A safe torque off and short winding braking
control circuit (10) and
elevator equipment (100). The safe torque off and short winding braking
control circuit (10) comprises a safety protection module (11), a safe torque off module (12), a
frequency conversion module (13), and a control module (14); the
frequency conversion module (13) comprises a switch unit (131), a driving unit (132), and a short winding braking
control unit (133); the safety protection module (11) is used for generating an off
signal when
elevator equipment (100) stops or fails, or the safety protection module (11) is disconnected; the safe torque off module (12) is used for being turned off on the basis of the off
signal so as to disconnect the control module (14) from the driving unit (132), and controlling the switch unit (131) to be turned off on the basis of the off
signal; and the control module (14) is used for generating a short winding braking instruction on the basis of the state of the safety protection module (11) and the state of the safe torque off module (12), so that on the basis of the short winding braking instruction, the short winding braking
control unit (133) controls the driving unit (132) to be short-circuited to a traction
machine so as to implement electronic short winding braking. It is ensured that two working
modes, i.e., electronic short winding braking and safe torque off, are independent of each other and do not conflict with each other; in addition, the working logic of mutual locking is also guaranteed, and the risk to the driving unit caused by simultaneous operation of the electronic short winding braking and the safe torque off is avoided.