CONTROL DEVICE FOR WINDING-TYPE MOTOR

• Main Authors: YOSHIDA SATORU, FURUTA KATSUMI, ASANO YOSHINOBU
• Format: Patent
• Language: English
• Published: 16.09.2004
• Edition: 7
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To obtain a control device for a winding-type motor improved in connection and high in withstand voltage by using a semiconductor as a switch means used at the secondary side of the winding-type motor. SOLUTION: The control device for the winding-type motor comprises resistors 4, 5 and 6 connected to phases at the secondary side of the three-phase winding-type motor each having a plurality of taps; semiconductor switch means 12 to 16 that are composed of semiconductor elements each of which is arranged at each tap of the resistor of each phase, which turns on a short circuit between the taps between the phases, and are back-to-back connected to one another; and a means 18 that accelerates the three-phase winding-type motor by gradually reducing the resistance of each resistor by sequentially turning on the semiconductor switch means. The control device is also characterized in that the semiconductor switch means 12 at the tap of a first stage, which is firstly turned on when accelerating the motor in common at each phase, is connected in series to each of the semiconductor switch means 13 to 16 of the taps on and after a second stage. COPYRIGHT: (C)2004,JPO&NCIPI