The transmission torque capacity of hydraulic cam and groove coupling is proportional to the square of speed

　　After using the cam and groove coupling to drive motor, generally do not start by reducing the pressure. Because the hydraulic cam and groove coupling has light load start function, can protect the motor from being damaged during the startup process; the coupler drive, high current when the motor is started only last 1-3s, will not cause the motor heating.

　　But if adopting the large-power motor, even in a short time, large currents may cause adverse consequences, then still need to use step-down start.

　　After starting by reducing pressure, delay start time can not be set too long. The transmission torque capacity of hydraulic cam and groove coupling is proportional to the square of speed, if the start time setting is too long, the motor will run at the rated speed in a long time, in other words, the hydraulic cam and groove coupling for long time is not up to the rated speed and can not reach the rated torque, so it can't start working machine, may even make coupler heating spray. As for the start time to set how long as well, different motor, different operating conditions are different, can be determined by test.

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