ELECTRIC WASHING MACHINE

PROBLEM TO BE SOLVED: To effectively generate a braking force when a plug socket comes off by providing an inverter circuit receiving a DC voltage from a DC voltage generating circuit to feed a current to a motor, and controlling a power source circuit to which the DC voltage generated by the DC vol...

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Bibliographische Detailangaben
Hauptverfasser: UCHIYAMA TOSHIYUKI, KAWAHARA SHIGEMI, KOIBUCHI HIROYUKI, HOSOKAWA ATSUSHI, ITO SHOICHI
Format: Patent
Sprache:eng
Schlagworte:
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Zusammenfassung:PROBLEM TO BE SOLVED: To effectively generate a braking force when a plug socket comes off by providing an inverter circuit receiving a DC voltage from a DC voltage generating circuit to feed a current to a motor, and controlling a power source circuit to which the DC voltage generated by the DC voltage generating circuit is supplied on the basis of this DC voltage. SOLUTION: When a strong rotating drive force or high rotating speed is generated by a small brushless electric motor 51k, the DC output voltage of a DC voltage generating circuit 29a is raised, and when a relatively weak rotating drive force or constant rotating speed is required, a voltage restraining PWM control is executed by a three-phase inverter circuit 29b in the state where the DC output voltage of the DC voltage generating circuit 29a is kept in a relatively low fixed value. At this time, the voltage supplied to the inverter circuit 29b is supplied to a capacitor 1614 and used as the power source of power source voltage generating circuits 1602, 1604 of the capacitor 1614. When a plug socket comes off, a control circuit is operated by the induced voltage of the electric motor 51 to apply the brakes.