Control apparatus for electric motor-driven hoisting-lowering device

An electric motor-driven hoisting-lowering device control apparatus characterized by comprising:

• a control board having mounted thereon non-contact switching devices and a microcomputer performing on-off control of the non-contact switching devices, the control board having three supply terminals on an input side thereof and three output terminals on an output side thereof in correspondence to the supply terminals, respectively;
• wherein when a three-phase alternating-current electric motor is to be used, a three-phase alternating-current power supply is connected to the supply terminals, and the three-phase alternating-current electric motor is connected to the output terminals, and an alternating current to be supplied to the three-phase alternating-current electric motor is controlled by controlling the non-contact switching devices with the microcomputer;
• when a single-phase alternating-current electric motor is to be used, two supply terminals of the three supply terminals of the control board are electrically connected together through a first connecting member to form a single-phase alternating-current power supply terminal to which is connected one terminal of a single-phase alternating-current power supply, and a second connecting member is connected to a remaining supply terminal to form a single-phase alternating-current power supply terminal to which is connected an other terminal of the single-phase alternating-current power supply;
• the single-phase alternating-current power supply being connected between the single-phase alternating-current power supply terminals;
• a main winding current path being formed so that an alternating current output from one output terminal of the output terminals corresponding to the supply terminals electrically connected together and the output terminal corresponding to the remaining supply terminal passes through a main winding of the single-phase alternating-current electric motor;
• and
• an auxiliary winding current path being formed so that an alternating current output from the other output terminal and the second connecting member passes through an auxiliary winding of the single-phase alternating-current electric motor, the alternating currents to be supplied to the main winding and the auxiliary winding being controlled by controlling the non-contact switching devices with the microcomputer.