Why can the motor not turn up after the installation of cam and groove coupling?

　　The starting time is too long. After using the hydraulic cam and groove coupling to transmit, if still using the original start system, and start time is too long, it can make the motor start. The reason is the step-down start can reduce the voltage, but also reduces the starting torque, and the motor speed from zero to the rated value. The ability of cam and groove coupling to pass torque is proportional to the speed square of the motor, so not to normal speed and make the cam and groove coupling clutch torque reduced, thus starting time prolonged, even can't start.

　　The load is too large, motor has little selection. If the motor selection is small. The motor force is too large, large current was maintained for a long time at startup, so heat protection device burned.

　　Starting torque of cam and groove coupling is low. From the bottom, the torque of cam and groove coupling is too low fundamentally, only affect the work machine start-up time, without affecting the motor starting, but coupling long time won't start load, motor startup time in overcoming the work machine static resistance distance, may also be fever. The above is the hydraulic cam and groove coupling in some of the reasons for any condition motor will not start.

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