Patent ID: 10566894

Abstract:
A three-phase alternating-current power supply compatible electrically driven hoisting machine having a three-phase alternating-current input terminal, a three-phase rectifier circuit, a direct-current circuit, an inverter, and a three-phase alternating-current motor is changed into a single-phase alternating-current power supply compatible electrically driven hoisting machine by attaching a single-phase AC-DC converter unit having a single-phase alternating-current input terminal, a single-phase AC-DC converter, and a direct-current circuit to the three-phase alternating-current power supply compatible electrically driven hoisting machine and connecting the P and N electrodes of a direct-current output terminal of the single-phase AC-DC converter unit to the P and N electrodes of the direct-current circuit, respectively, and further open-circuiting the three-phase alternating-current input terminal.