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  1. What Is Rotor Balancing? A Quick Guide

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    Rotor Balancing

    Rotors are essential components in electric motor operation. Keeping them properly balanced by addressing any issues in electromechanical systems helps ensure motor longevity and optimal performance. Learn more about why rotor balancing is important, how electrical and mechanical conditions play into a rotor’s alignment, and how preventative and predictive rotor maintenance can help you protect your equipment.

    Importance of Rotor Balancing in Motors

    Rotors in electric motors generate rotational motion from electrical or electromagnetic energy. During operations, an imbalance can occur when more weight is applied to one side of the rotor than the other. Rotor balancing is necessary to ensure that the weight distribution on a rotor is even for optimal axis alignment, enhancing the reliability and efficiency of a motor while protecting critical components like seals and bearings. Imbalance can start off as increased vibration or noise. If left unaddressed, however, electrical imbalances and mechanical problems can result in premature failure of the motor.

    Role of Electrical & Mechanical Elements in Rotor Balancing

    Successfully balancing a rotor requires you to evaluate and address both mechanical and electrical factors. Failing to consider the electrical components within rotating equipment ignores the effect that electrical imbalance and other irregularities can have on mechanical components. The following are examples of the interconnected role that electrical and mechanical factors play in rotor balance:

    • Force generation. Voltage imbalance, uneven winding, and other such electrical problems will distribute force unevenly on a rotor, resulting in rotor imbalance and preventing smooth rotational movement.
    • Vibration induction. As machinery operates, electrical problems can lead to imbalance and then vibration for reduced rotor performance. These vibrations can then increase a rotor’s mechanical imbalance, negatively impacting the system’s stability.
    • Dynamic interactions. These interactions between mechanical and electrical parts take place during rotation and can cause mechanical instability. They also worsen problems with electrical balance and vibration in a rotor.
    • Winding integrity. Imbalanced rotors promote vibrations in electro-mechanical systems, degrading stator winding integrity. Winding analysis is a critical method for evaluating such electrical conditions and their effect on rotor balancing.

    Avoid Rotor Imbalance With Premium Preventative & Predictive Services From Renown Electric

    At Renown Electric Motors & Repair Inc., we’re here to assist with your rotor balancing concerns. We offer various preventative and predictive maintenance services for electric motors, including vibration analysis, winding analysis, and dynamic balancing, to provide you with comprehensive equipment care solutions.

    Vibration and winding analyses work together to assess the health of electric motors and generators. Vibration analysis diagnoses the equipment’s mechanical condition, looking for imbalance and misalignment as well as mechanical looseness, and winding analysis examines for electrical concerns like degrading insulation and the ingress of moisture or contamination. When vibration analysis detects imbalances, dynamic balancing as a preventative maintenance strategy fixes imbalances to improve equipment reliability and reduce wear and tear.

    Renown Electric combines these services to promote holistic motor and generator health through proactive monitoring and maintenance. We leverage our expertise with state-of-the-art equipment like the VIBXPERT II balancing system, a Baker D65R, an Advanced Winding Analyzer (AWA-IV), and i-Alert® sensors to evaluate your motor and its components for optimal efficiency and reliability. Our team can provide rotor balancing and related maintenance services in-house and in the field.

    As evidence of our commitment to quality in both products and services, Renown Electric also maintains the following certifications:

    • Avetta
    • Canadian Standards Association (CSA)
    • Cognibox
    • Contractor Check
    • Contractor Compliance
    • Electrical Safety Authority (ESA)
    • Electro-Mechanical Authority (EASA)
    • EXIROS
    • ISNetworld
    • ISO 9001:2015
    • QUAREM

    We combine our extensive knowledge, well-equipped facilities, and certified processes to drive efficiency and help you reach your operational goals.

    Contact Our Experts for Premium Rotor Balancing Services

    Rotor balancing services are critical to the electrical and mechanical health of your equipment. The expert team at Renown Electric is backed by nearly 40 years of experience in supplying and repairing high-performance electric motors and generators, enabling us to deliver premium rotor balancing solutions and quality services to clients worldwide. Contact us today to learn more about our capabilities or speak with an expert about your rotor balancing needs.

  2. What Are Non-NEMA Motors?

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    The National Electrical Manufacturers Association, or NEMA, is a trade association that sets industry standards for a range of electrical components, equipment, and medical technologies, including electrical motors. When motors are larger than the frame sizes outlined by NEMA, they are referred to as Above-NEMA, or A-NEMA, motors. In this blog, we’ll provide an overview of A-NEMA motors and the key factors to consider when selecting the right A-NEMA motor for your application.

    What Are Above-Nema (A-NEMA) Motors?

    Non NEMA Motor

    North American manufacturers of electric motors must follow NEMA guidelines when it comes to frames, efficiency, and production. However, the rest of the world complies with International Electrotechnical Commission (IEC) standards, which are the European-based equivalent to NEMA guidelines for electric component and motor manufacturing.

    A manufacturer that complies with IEC standards can choose from a more extensive variety of products throughout the global market. This allows companies to boost their flexibility, reduce production costs, and diversify their supply chains. IEC standards also focus on energy efficiency and sustainability in compliance with European and global regulations, making the rating more favorable in international markets where energy efficiency is a priority.

    An electric motor that is Above-NEMA (A-NEMA) is not unregulated; rather, it is a custom-engineered size. These motors follow many of the same standards as regularly sized motors; however, they are specifically manufactured for larger rotating electrical machines that range from hundreds to tens of thousands of horsepower. These motors are engineered to meet certain specifications for:

    • Voltage
    • Mounting type or requirements
    • Hazardous area classification
    • Frame size
    • Documentation
    • Design aspects

    Do Standardized Frame Sizes Exist for A-NEMA Motors?

    A-NEMA motors have standardized frame sizes ranging from 440T to 1000L. The frame sizes for A-NEMA motors can differ depending on the manufacturer; however, there are still standard frame sizes that are popular throughout the industry.

    Considerations When Selecting A-NEMA Motors

    The following considerations are vital to selecting the right A-NEMA motor:

    • Application requirements. It’s crucial to consider your application’s requirements for power output, speed, duty cycle, torque, and environmental conditions. This will ensure the A-NEMA motor you select will perform reliably and efficiently for the intended use.
    • Physical dimensions. A-NEMA motors come in a wide range of standard and non-standard shapes and sizes. As such, it’s important to choose an A-NEMA motor that will fit properly within the available space and mounting configuration. The size of the motor’s frame is especially important to consider in this regard.
    • Operating efficiency. A-NEMA motor efficiency can vary widely, so it’s critical to choose a motor that meets or exceeds the standards set by regulatory agencies regarding efficiency levels. Doing so will reduce costs associated with operations and energy usage over your motor’s lifespan.
    • Motor options and features. A-NEMA motors come with various options and features, including vibration monitoring, numerous types of enclosures, and high-speed bearings. Be sure to consider which of these options your application requires and choose an A-NEMA motor that fits those criteria.
    • The reputation of the manufacturer or supplier. Choosing a reputable supplier or manufacturer is paramount in ensuring the quality of your A-NEMA motor. These companies will also be able to support your motor over its lifetime to ensure you don’t experience costly downtime. When looking for the right manufacturer or supplier, consider their service capabilities, product warranties, and technical support.

    Power Up Your Applications With the Right A-NEMA Motor

    Although North American manufacturers must comply with NEMA standards for motor frames and production, other applications may require larger A-NEMA or non-NEMA motors. At Renown Electric, we’re a distributor of non-NEMA motors, including those that are compliant with IEC standards. In addition to our wide selection of IEC motors, we also offer predictive maintenance programs that include balancing, infrared thermography, vibration analysis, and more to keep your motors in optimal condition.

    For more information about our non-NEMA motors, or for help selecting the right motor for your application, contact the experts at Renown Electric today.

  3. What are NEMA Motor Standards?

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    Knowing the difference between NEMA and non-NEMA motors will help you and your product team choose the right motors for your designs, both in terms of product performance and in terms of the efficacy of design and manufacturing in an increasingly global market. At Renown Electric, we specialize in large non-NEMA motors, as well as NEMA and IEC motors, that are designed to provide a high level of performance. Learn more about NEMA electric motor standards and NEMA motor class designations.

    The NEMA standards cover a wide range of electric motor frame sizes used in North America. However, there are some electric motors that are larger than the largest NEMA frame sizes. These motors are typically used in heavy industrial applications, and their frame sizes are often designated by different standards.

    One common standard for larger electric motor frame sizes is the IEEE (Institute of Electrical and Electronics Engineers) standard. The IEEE standard defines frame sizes for large AC and DC motors used in industrial applications. These frame sizes range from 315 to 1000, with corresponding shaft heights ranging from 400 mm to 1600 mm.

    Another standard for large electric motor frame sizes is the IEC (International Electrotechnical Commission) standard. The IEC standard defines frame sizes for AC motors used in Europe and other parts of the world. These frame sizes range from 315 to 1000, with corresponding shaft heights ranging from 400 mm to 1600 mm.

    It’s worth noting that electric motors larger than the NEMA standards are often custom-built to meet the specific needs of the application they will be used in. These motors may have unique frame sizes, configurations, and performance characteristics that are tailored to the requirements of the application.

    What Are NEMA Standards?

    NEMA standards are the North American equivalent of IEC electric motor standards, and they primarily focus on the type of enclosure electrical components have (though NEMA standards encompass far more than this). Manufacturers can choose to design and produce components that comply with NEMA standards, but this is a voluntary distinction for electrical component manufacturers.

    Electrical enclosures with a NEMA rating are assessed as meeting certain standards related to protection from corrosion, dust, and chemical damage. These standards are updated every five years and communicate to potential purchasers the level of durability that electrical enclosures have in certain environmental conditions. Non-NEMA motors and electrical enclosures can be just as safe as — or even safer — than NEMA products based on the regulations and quality standards of the specific manufacturer.

    NEMA Design Classes

    NEMA Motor

    NEMA standards establish four distinct design classes. Motors that fall within each design class have different characteristics and are manufactured to have different levels of durability in their operational environments. The four NEMA design classes are:

    NEMA Class A

    Electric motors within NEMA Classes A, B, and C each have a maximum 5% slip standard. NEMA Class A motors must meet that standard with a medium or high starting current. They must also have a normal breakdown torque, or the maximum torque at a rated voltage and frequency level without decreasing in speed, and locked rotor torque, the torque the motor develops from a zero-speed start. NEMA Class A motors are trusted in a wide variety of commercial, industrial, and building applications, such as in fans and pump systems.

    NEMA Class B

    NEMA Class B motors must also have a normal breakdown torque, just like Class A motors. However, they need to have a low starting current and be able to accommodate normal starting torque levels. They also must be able to provide or withstand a high locked rotor torque. This distinction is ideal for motors that will power elements through HVAC systems.

    NEMA Class C

    NEMA Class C motors share many of the requirements of NEMA Class B products. However, they’re built for applications with a high starting torque and high level of inertia, such as large conveyor systems and heavy-duty systems.

    NEMA Class D

    NEMA Class D motors are built for high-inertia applications, such as oversized equipment including cranes and hoists found in construction or mining settings. These motors have a low starting current but a high locked rotor torque. They also have a maximum slip range of 5 to 13%.

    NEMA Frame Sizes

    Ranging from 42 to 449, NEMA frame sizes provide a standard by which all manufacturers can provide the same shaft, shaft height, length, etc. so that designers of equipment know in advance the dimensions a given motor based on HP and RPM.

    NEMA (National Electrical Manufacturers Association) standards are a set of guidelines that establish standardization for various electrical equipment, including electric motor frame sizes. The NEMA standard for electric motor frame sizes defines the physical dimensions, mounting, and other characteristics of electric motor frames used in North America.

    The NEMA standard for electric motor frame sizes covers a wide range of motor sizes, from fractional horsepower motors to large motors used in industrial applications. The standard defines specific frame sizes, which are designated by a number that indicates the overall size of the frame. For example, a NEMA frame size 56 is a common size for fractional horsepower motors used in appliances and power tools.

    The NEMA standard also defines the mounting dimensions and other physical characteristics of the motor frame. This ensures that motors from different manufacturers can be easily interchanged and that the motor will fit properly in the equipment it is being used in. In addition to the frame size, the standard defines mounting options such as foot mounting or flange mounting, and specifies the shaft diameter and length.

    Overall, the NEMA standards for electric motor frame sizes help to ensure that electric motors are compatible with the equipment they are being used in, and that they meet certain quality and performance standards.

    Find NEMA Motors With Renown Electric

    Renown Electric has been providing high-quality motors and motor repair services for over 35 years. Contact us today to learn more about sourcing the right electric motors for your next project.

  4. How the Hydroelectric Sector Uses Electric Generators

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    Using a hydraulic turbine, hydroelectric generators convert the mechanical energy of flowing water into electricity. Hydroelectric generators are connected to the turbine via a salient pole rotor. Generator rotors have field poles, which are multi-layered electromagnetic steel laminations surrounded by loops of wire arranged on the perimeter of the rotor. The number of field poles on a rotor depends on the rated speed of the generator. The water’s mechanical energy spins a turbine, forcing the field poles to rotate. As the generator circulates direct current through the rotating field poles, the poles pass by stationary conductors in the generator’s stator. This interaction generates a flow of electricity with a voltage, thereby generating usable electricity for storage and distribution.

    (Click to Expand)

    How the Hydroelectric Sector Uses Electric Generators


    How Does a Hydroelectric Generator Work?

    Since hydro power relies on flowing water, most hydroelectric plants are built near a source of moving water, such as a river or a dam. In fact, most plants either directly use run-of-the-river water or pumped water storage to power the system. The volume of moving water and the change in elevation determines the energy available to the generator. The greater the water flow and change in elevation, the greater the mechanical energy that can be converted to electrical energy.

    In the plant, the water itself flows through a penstock or pipe, surging against and spinning the blades of a turbine, causing the rotor with the field poles to rotate. This motion spins the generator and creates electricity.

    Repairs for Hydroelectric Generators

    Hydroelectric generators transform mechanical energy from the spinning turbines into electrical energy using electromagnetic coils within the generator stator and rotor. The harsh operating environment and sheer amount of energy flowing through the hydroelectric system places enormous stress on the components within the generator. Coil winding failures and mechanical failures are the two most common issues faced by operators of hydroelectric generators.

    Coil Winding Failures

    When a stator or rotor in a hydroelectric generator fails due to damage or the effects of thermal aging, they must be rewound. The rewinding process involves taking detailed as-found data and measurements of the existing windings to enable new coils to be reverse engineered. The original windings are then stripped from the generator, and further measurements of these coils are taken to ensure that the correct geometry is maintained for the new coils.

    Rewinding a hydroelectric generator stator also provides an ideal opportunity to enhance the performance of the generator by utilizing conductors having an increased cross-sectional area over the original coils. Using larger conductors will reduce I2R losses in the winding and thereby improve the overall efficiency of the generator.

    Mechanical Failures

    Mechanical failure of a hydroelectric generator can be caused by a number of underlying issues. If any part of the system is misaligned or unbalanced, the hydroelectric equipment may experience high levels of vibration that can damage the overall system. A vibration analysis conducted while the generator is operating allows technicians to detect the location and nature of balance or alignment issues to facilitate correction at the source. Imbalance and misalignment can be caused by anything from a loose fastener or bearing to broken welds and rotor defects.

    Other common repairs and maintenance for hydroelectric generators include the repair and replacement of:

    • Bearings
    • Slip rings
    • Brush rigging
    • Exciter components
    • Rotors
    • Stators

    Maintenance can also include the cleaning of rotors and stators in-situ. The size and weight of a hydroelectric generator can make repairs and maintenance difficult, but experienced and competent technicians are capable of conducting many repairs on location. Dry-Ice blasting, certain machining operations and rebuilding brush rigging are all examples of common repairs done in the field.

    The Importance of Electric Motor and Generator Repairs

    Electric motors and generators need regular repair and maintenance to keep them running efficiently and to minimize the risk of more severe breakage down the line. If left unsolved, mechanical and electrical issues will only be exacerbated, leading to more downtime, more expensive repairs, and increased safety risks. With the right repair and maintenance services, you can minimize both unscheduled and scheduled downtime to ensure an uninterrupted power generation schedule.

    Regular maintenance is a cost-effective, predictable, and efficient way to manage the productivity and costs of hydroelectric operations. A maintenance strategy gives you an overview of your equipment’s components, current condition, and expected service life. You can avoid prolonged downtime and costly emergency repairs with proper contingency planning (link to Renown’s contingency planning guide (planned outage?) for more details).

    Your Source for Hydroelectric Industry Generator and Motor Solutions

    Without all these critical components in working order, hydroelectric generators cannot function properly. At Renown Electric, we specialize in the repair and maintenance of electrical rotating machines for organizations throughout the power generation sector. Learn more about hydroelectric generators, some of the most common repairs, and how our team can help.

    With the increased demand for renewable energy facilities, proper repairs and maintenance of hydroelectric power plants are more important than ever. For nearly 40 years, Renown Electric’s technicians and engineers have been providing customers in the power industry with reliable, high-quality products and services. Renown Electric is ISO 9001:2015 and CSA certified, and our quality assurance inspections and testing ensure our repair processes comply with strict OEM regulations.

    Contact us today to learn more or to create the right maintenance plan for your motors and generators.

  5. Mining Hoists

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    Today’s high-efficiency mines rely on effective hoisting and transportation systems to move people, goods, and equipment. Having the right hoists and safety equipment is essential for growing your operation while protecting your employees. Learn more about mining hoists, our upgrade and repair services, and Canadian regulations for surface hoist operations.

    Mining Hoists Explained

    Mining Industry

    Electric hoists raise and lower the conveyances in underground mines. Miners rely on them for daily operations: moving equipment, crushed ore, and people between the surface and the mining zone thousands of feet underground. In fact, mine hoists are often the only way to transport mining equipment and personnel to and from mining sites. Because human life depends on these systems, they need to provide consistent reliability with no risk of failure or miscalibration.

    The electric components that control these hoists need to have the right power levels for these heavy loads and the right protections to ensure safe, reliable operation. Mining hoists commonly use electric motors powered by either AC motors with variable frequency drives or DC motors with solid-state converters. Drum hoists feature a sheave and headframe assembly, which are vital to the safe operation of underground mines.

    At Renown Electric, we provide repair and troubleshooting services for AC and DC mining hoist motors and controls. Not only are our drive repairs tested for complete reliability, but we also offer controller trending and PMs to increase mine production and optimize cycle times.

    Types of Electric Mine Hoists

    There are many different types of mine hoists available for mining companies to select from, including:

    • Blair hoists
    • Escape hoists
    • Friction hoists (Koepe hoists)
    • Single drum hoists
    • Double drum hoists

    Each system includes digital controls, full automation, hydraulic brakes, motors, and drives. Powered with an electric or hydraulic drive, our team will work with your preferred partners to assist with assembly, factory or field testing, and commissioning.

    Updates and Repairs for Mining Hoists

    At Renown Electric, we specialize in servicing electric drive systems for critical applications such as underground mining. We design, manufacture, and thoroughly test hoist systems so our clients have a complete solution for their worksites. In addition to these services, we also provide:

    Part Repair and Replacement

    Mining companies around the world trust Renown Electric for:

    • Replacing old or worn drives quickly to minimize unscheduled downtime
    • Repairs for motors, generators, and drives
    • Repairs for electronic components

    Part Remanufacturing

    Our team can rebuild or recover non-functional components for legacy systems and complex hoist equipment. Some of our most common remanufacturing projects are for:

    • Bull gears and pinions
    • Clutches
    • Enclosed gearboxes

    Mining Hoist Regulations in Canada

    Mining environments can be extremely hazardous, so equipment needs to meet strict standards to ensure the safety of workers and the efficacy of the worksite. The Coal Mining Occupational Health and Safety Regulations establish these standards in Canada, dictating the minimum requirements for surface hoist systems, from the framing and installation requirements of the system to the safety and emergency systems that must accompany each unit. The full list of regulations can be found here.

    At Renown Electric, we take care to ensure all of our products and services meet or exceed these safety and performance requirements so you can operate your site with peace of mind.

    Expert Services From Renown Electric

    A reliable and well-maintained mining hoist can make all the difference for the safe and efficient performance of your mining operations. Renown Electric’s team is here to help with your mining hoist repair and maintenance needs for safe movement in mines, with levels reaching hundreds to thousands of feet below the surface.Contact us today to learn more about our mining hoist repair services.

  6. Rewinding Services

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    At Renown Electric Motors & Repair Inc., we understand the importance of properly maintaining motors and generators. Not only does this help your operation avoid unexpected downtime and the costs involved with equipment failure, but keeping up with repairs will enhance the efficiency and capacity of a motor and generator, help keep energy costs from rising, and improve system safety.

    Since 1984, Renown Electric has built a reputation with clients across the world for providing top-tier motor and generator rewinding and rebuilding services for all leading brands. Read on to learn more about the equipment, brands, and industries we serve, as well as our qualifications in the field.

    What Kind of AC/DC Does Renown Electric Work On?

    Our staff excels in mechanical and electrical rewindings, repairs, overhauls, and remanufactures. The team’s extensive expertise in remanufacturing enables us to offer superior engineering support both on-site and in-house, giving us the ability to rewind and rebuild top-brand AC/DC motors up to 60,000 HP. Over the years we have developed expertise with and repaired many brands of motors including:

    • ABB
    • Allen-Bradley
    • Baldor
    • Bull
    • Emod Motoren
    • Fanuc
    • General Electric
    • Imperial Electric
    • Leroy Somer
    • Otis
    • SEW-Eurodrive Inc.
    • Siemens
    • TECO Westinghouse
    • Torin
    • Toshiba
    • US Motors
    • WEG

    Renown Electric works out of a 34,000-sq.-ft. large motor and generator service centre, a separate 25,000-sq.-ft. facility for multi-purpose motors & headquarters, and a 12,000-sq.-ft. warehouse for inventory and motor management. To provide innovative solutions, our facilities feature state-of-the-art remanufacturing technologies, such as computerized winders and testing machinery.

    Some of our service shop offerings include:

    • Computer-controlled winding and stripping
    • Custom coil design
    • Programs for management, predictive maintenance, and vibration analysis
    • Balancing
    • Laser alignment
    • Thorough and in-depth testing
    • Fast turnaround

    In Southern Ontario, we also offer free, easy, and convenient equipment pickups and returns through our expansive fleet of delivery and service vehicles.

    What Industries Do We Support With Rebuild and Rewind Services?

    At Renown Electric, we work with businesses of all sizes to help restore equipment to its OEM specifications. Our knowledgeable team has extensive experience in rewind services for customers in diverse industries, such as:

    • Elevators
    • HVAC systems
    • Hydroelectric, steam, and turbine power
    • Petrochemical
    • Pulp and paper mills
    • Refineries
    • Steel and metal production
    • Underground mining operations
    • Water and wastewater treatment

    Renown Electric’s Motor Rebuilding and Rewinding Certifications and Qualifications

    In addition to 24/7 customer service and innovative processes, Renown Electric is committed to the highest level of quality. Part of this commitment is built on our qualifications and the prominent industry certifications we hold. These include:

    • ISO 9001:2015
    • Compliance with BROWZ, EXIROS, ISN, and QUADREM
    • CSA Qualification for the Repair and Service of Motors and Generators in Hazardous Locations

    Contact the Professionals at Renown Electric

    Renown Electric offers some of the most dependable rewinding services available. We’ll work with you to meet your requirements and return your equipment to like-new levels of efficiency. Depending on your needs, one of our 50+ dedicated employees will provide either in-house or on-site services. In addition to rebuilding and rewinding, we offer dynamic balancing, infrared thermography, vibration analysis, oil analysis, and other critical services to best serve you with comprehensive capabilities.

    Regardless of your needs or equipment type, our experts are here to help. Get in touch with our team to learn more about our service offerings. You can reach us by email, calling 1-877-742-3665, or through our online contact form. To start your project, request a quote today.

  7. Mining Industry

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    Electric motors and generators are vital to the mining industry, allowing equipment such as mills, crushers, hoists, pumps, and haulers to operate. Tools and machinery for this work must be durable and reliable to enable seamless production in even the harshest of environmental conditions. When motors or generators do fail, this can cause significant interruptions to your operation for equipment repair, which results in lost revenue or even worker injury. Periodic maintenance will help your mining operation avoid costly downtime and replacement parts, as well as unsafe working conditions.

    As an authorized dealer, service provider, and warranty center for the majority of big-name motor and generator manufacturers, Renown Electric Motors & Repair Inc. understands what it takes to keep your AC and DC motors and generators running at their best. Since 1984, we have provided electrical and mechanical motor and generator preventative maintenance programs and engineering support, repair, remanufacture, and overhaul services to diverse industries across the world.

    Motor & Generator Maintenance & Repair in the Mining Industry

    Mining Industry

    Considering the ways in which mining operations can go awry, regular electric motor and generator maintenance is a necessity to help assure equipment life span and reliability. To that end, Renown Electric provides the following services:

    • Preventative maintenance. Inspecting machines periodically helps identify potential operational and performance issues before they become a challenge.
    • Winding analysis. We’ll check your equipment’s dielectric strength, or its insulation value in protecting against contaminants and spikes in voltage, to determine if replacement or overhaul is required.
    • Motor and generator rewinding. Motor and generator rewinds are an economical way to restore a motor or generator to like-new efficiency and enhance horsepower output.
    • Bearing maintenance and replacement. Bearings, as load-carrying components, usually wear out quickly compared to other motor parts, so regular bearing inspections can prevent unexpected motor breakdowns.
    • Inverter/drive maintenance and repair. Electric motor drives enable control over the speed and torque of a motor. Carrying out predictive or preventative maintenance on these drives reduces damage risk within a machine and provides smooth operational performance.
    • Diagnosing and repairing motor drives. Renown Electric’s wide range of services includes diagnostics for AC and DC inverters and drives, as well as any necessary repairs and load testing.

    Partner With Renown Electric for Electric Motor & Generator Repair Services

    Renown Electric supports the mining industry with trusted maintenance and repair services for electric motors and more to reduce operational downtime. We combine our team’s extensive experience; our ISO 9001:2015-certified, state-of-the-art facility; and quality, cost-effective repair and maintenance solutions to meet the goal of being a one-stop shop for mining professionals. In addition to general rotating equipment repair and machine shop services, we offer:

    • Rebuilding and rewinding motors and generators
    • Repairing and rebuilding gearboxes
    • Repairing servo motors, motor drives, and pumps
    • Manufacturing and regrooving sheaves
    • Surveilling motors and drives
    • Analyzing repeat failures for root cause through the use of Motion Amplification technology.

    Electric Motor & Generator Repair Is Crucial to the Mining Industry

    The mining industry is moving to AC motors with variable frequency drives (VFDs) to regulate their speed through analog controls. These VFD motors utilize cooling systems to maintain performance quality, pulling heat from power-generating semiconductor components to increase the motors’ life span. Their compact footprint makes them suitable for small spaces or harsh conditions in mining applications.

    High-voltage drives are efficient for mining tasks. In the power delivery systems of large, soft-starting mill motors, these drives reduce stress by safeguarding against low current inrush and voltage dips. They effectively control torque, speed, and power within a motor to optimize operations and enhance equipment longevity.

    To make sure such equipment remains highly functional and safe to use, Renown Electric inspects VFDs and soft starters, tracking a drive’s output and input over time. Our team gathers these measurements to set up a baseline of capacitor performance. This allows us to pinpoint any variations in ripple, DC bus voltage, or the workings of internal drives to avoid unexpected downtime and lost revenue.

    Learn More in Our Mining eBook

    Proactive maintenance and repairs ensure that equipment with applications in the mining industry operates effectively and efficiently. To learn more about this topic and how Renown Electric can support your business, read our eBook, “Mining Industry: Importance of Motor & Generator Maintenance & Repair in the Mining Industry.” We cover such topics as the importance of maintaining and repairing motors and generators, the types of repair services that are vital for this electric equipment, and our own team’s capabilities. 

    For more information, you can visit our office at 99 Ortona Court, Vaughan, Ontario L4K Canada, or call us at 877-742-3665. We are also reachable by email at [email protected], or you can go through our website and contact us to request a quote.

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