Whether electric hoist can be used for frequency converter

Electric hoist can not be used for speed control of the inverter. Reason: electric hoist motor is conical rotor. In the end cover side (by the elastic force of the spring brake (brake), at startup to full voltage to pull the rotor from the brake pads, if with frequency converter, is gradually pressurized (voltage) from small to large, because of insufficient voltage, tension, rotor is stopped, inverter due to the rotor blocking instead overcurrent fault parking.
If you do not brake, remove the brake device, you can use the inverter, but no brake, it can not be installed on the crane


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