After the current is disconnected, the magnetic powder quickly restores the non-excited state, releases the control of the clutch, and quickly restores the off state.Through the control of current, multiple functions of overload protection, clutch, no-load drive, torque adjustment, speed control, tension control, position control and commutation are realized.

　　The torque control has a wide range and high control accuracy.The torque is proportional to the excitation current in a considerable range, which can improve and simplify the control of the transmission torque, and can be used as a linear adjustment element.It has constant torque. The torque depends only on the size of the excitation current, and has nothing to do with the relative torque of the master and slave sides. It has a constant torque, and its static torque is the same as the dynamic torque.

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