Veriable Frequency Drives Specfication

[adnan012]

hi,

I want to discuss a vfd such as

https://uk.rs-online.com/web/p/inverter-drives/7858544/

The output frequency is 0.1 → 600Hz.

What is the purpose of generating high frequency (grater than 60 HZ) .
Is it for torque compensation at low voltage?
What is the amplitude range of the voltage generated by the vfd at high frequency?
How V\F ratio is maintained at high frequency?

 

[FvM]

Maximum output phase-to-phase voltage is roughly equal input phase-to-phase voltage.

Industry standard 50/60 Hz induction motor can be operated at slightly higher frequencies in "field weaking" mode with reduced torque. Practically, up to double speed (1/4 of rated torque) may be reasonable in some cases.

The high inverter frequency range is only suitable for specially designed motors, e.g. aviation motor with 400 Hz rated frequency or small borehole pumps.

 

[adnan012]

So there is no voltage boosting available in VFD.

Thanks a lot.

 

[FvM]

It's not available in standard VFD topology (single or three-phase bridge rectifier + three-phase output bridge).