How VFD Maintenance Can Save Your Bottom Line
Variable frequency drives (VFDs) are devices that regulate the operation of a motor by adjusting the frequency and voltage levels of the electrical input. They are commonly used in various electromechanical systems, from home appliances to industrial equipment.
Like other electrical and electronic components, VFDs need proper and regular maintenance to ensure consistent and reliable performance. This article explores some key considerations and benefits related to preventative maintenance for variable frequency drives.
An Overview of Preventative Maintenance for VFDs
When using variable frequency drives, it is important to keep in mind the following tips:
- Keep them clean
- Keep them dry
- Keep connections tight
Keeping VFDs clean and dry and their connections secure can result in better system performance and fewer unanticipated repair and replacement needs. However, even if all of these requirements are fully met, component and complete system failure can occur as a result of many other reasons (e.g., component aging or adverse operating conditions such as excessive temperatures or loads). As such, preventative maintenance is still essential to ensuring a motorized system remains in working order throughout the duration of its expected service life.
Preventative maintenance operations should occur periodically—e.g., for low-voltage VFDs, maintenance should occur at least once a year. Some of the activities that appear on typical checklists include:
- Visually inspecting the device
- Removing dust and debris using dry compressed air
- Checking connections for proper tightness
- Setting up a replacement schedule for consumable parts
Benefits of Performing Preventative Maintenance on Variable Frequency Drives
By performing regular preventative maintenance on VFDs, industry professionals experience a number of benefits, such as:
Longer Service Lives in VFDs
Regularly scheduled preventative maintenance programs help industry professionals identify potential operational issues before they cause component or system failure. As a result, they help enhance the reliability and extend the life of essential equipment, including VFDs.
Better Performance from VFDs
Preventative maintenance ensures VFDs operate as intended for longer periods of time. This greater reliability also translates to better control and operational capacities, which allows the devices to accommodate a wider range of applicational requirements without risk of failure.
Bigger Cost Savings Over Time
Investing in regular preventative maintenance operations saves money in several ways. First, it reduces the need for unplanned repair and replacement costs. Second, it lowers the chance of the device requiring complete replacement. Third, it minimizes the amount of time a piece of equipment is out of commission and, consequently, the amount of money lost during downtime. Fourth, some state and local agencies offer incentives for regular VFD usage and maintenance.