Patent ID: 11881800
Assignee: KITO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 1:
2. The electric motor-driven hoisting-lowering device control apparatus of claim 1, wherein when the three-phase alternating-current electric motor is used, switching between forward and reverse rotation of the three-phase alternating-current electric motor is performed by interchanging two phases of the three-phase alternating current through on-off control of the non-contact switching devices; and
when the single-phase alternating-current electric motor is used, switching between forward and reverse rotation of the single-phase alternating-current electric motor is performed by performing switching such that a phase of a main current flowing through the main winding of the single-phase alternating-current electric motor is reversed 180 degrees when rotation is switched between forward and reverse through on-off control of the non-contact switching devices.