Electric power conversion systems – Current conversion – Including automatic or integral protection means
Reexamination Certificate
2009-01-26
2011-10-11
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
Including automatic or integral protection means
C363S056090, C363S049000
Reexamination Certificate
active
08036003
ABSTRACT:
The present invention provides a switching power supply device capable of automatically restarting an electrical apparatus without a user operation when a voltage of the electrical apparatus or an operation of the electrical apparatus is abnormal. The switching power supply device is provided with a short-circuiting switch for a shunt regulator included in the feedback circuit. When an abnormal condition occurs in a secondary side circuit, the short-circuiting switch is turned on by means of a control signal to reduce a voltage of a primary side auxiliary winding and temporarily stop an operation of a primary side control circuit and of a switching element. A primary side capacitor continues to be charged by a power supply through a starting resistor. The primary side control circuit and the switching element automatically restart to operate.
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Antonelli, Terry Stout & Kraus, LLP.
Han Jessica
Hitachi , Ltd.
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