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Power supply circuit having partial switching circuit, method of detecting abnormality of power supply circuit, abnormality detection program of power supply circuit, and air conditioner
Power supply circuit having partial switching circuit, method of detecting abnormality of power supply circuit, abnormality detection program of power supply circuit, and air conditioner
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机译:具有部分开关电路的电源电路,检测电源电路异常的方法,电源电路异常检测程序以及空调机
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摘要
PROBLEM TO BE SOLVED: To determine whether a partial switching circuit is normal or abnormal.SOLUTION: A power supply circuit 10 includes: a reactor 11 connected to one end of a single phase commercial power supply AC; forward converting circuits 12 and 13 connected between the other end of the reactor and the other end of the commercial power supply, and supplying direct-current power to a load (an inverter 2); a partial switching circuit 14 connected to the forward converting circuit side of the reactor through a fuse 15, and sequentially executing short-circuit/open-circuit between the other end of the commercial power supply and the partial switching circuit; and a control portion 9 which performs feedback-control on pulse width of a control pulse for controlling the partial switching circuit so as to make direct-current voltage applied on the load become target voltage. The control portion varies the control pulse width or the target voltage when the direct-current voltage is out of the target voltage width, determines as normal when the direct-current voltage applied on the load follows the change, and determines as abnormal when the direct-current voltage applied on the load does not follow the change.
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