Tag: vfd

The advantages of VFD controls plastic extrusion machine

1. VFD controls the driving motor of the main engine and auxiliary engine, satisfy the required revolving speed and power of the process, make sure that the main engine and auxiliary engine can operate coordinately. ATO VFD realize the automatic control of the whole unit, ensure good quality and high yield.
2. Realize remote control, fine adjustment of the speed.

The variable frequency drive has the following ten protections on the motor:
Over-voltage protection: The variable frequency drive output has automatic voltage regulator function to control the external overtop power input to be not exceed the motor rated voltage.

If you want to connect a 3-phase motor to a single phase power supply, then you have several solutions:
1) use a VFD with a single phase input and convert to 3-phase output, this is generally available for low power VFD (few horsepower).
2) apply a specially wound transformer that also mimic a 3-phase system from a single phase power supply. Expect difficulties to source and high price.
3) calculate a capacitor that will be connected between the remaining phases, such to apply it a phase shift and to mimic a 3-phase system.