Control

VFD Applications

Motor Starter and Variable Frequency Drive applications range from a simple stand alone starter application to a full blown Starter/VFD/Bypass system. On the VFD side, most applications require careful sizing of the system components as well as proper feature selection (Vector/Frequency/Servo control VFD, external references, communication, etc.). The starter applications (across-the-line or soft-start with a bypass) typically present complications only when large motors are involved (200 HP and higher). In such cases, a system simulation to assess large motor starting current effects is advisable to avoid voltage stability problems in the facility.

PowerCore Engineering helps with such aspects of independent Customized VFD/Starter Application as:

• VFD/Starter selection based on process requirement
• System simulation of the large starter application (across-the-line vs. Soft-start)
• Line/Load reactors for VFD selection
• Drive/Starter supply, installation, and programming
• External control interface (Digital and Analogue controls)
• Communication interface to external SCADA or energy management systems
• Control and interface drawings

A VFD or a soft starter installed can be a very effective and economical way to control large motor loads. Having it properly sized and selected can avoid many problems and pitfalls that may be associated with such an application.