PFC (Power Factor Correction) fault detection method for direct-current variable frequency air conditioner controller
An air-conditioning controller, DC frequency conversion technology, applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problems of only one-way, the main controller can not detect, PFC can not play the role of adjustment, etc., to achieve easy discovery, The effect of great practical value and potential practical significance
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[0013] The present invention is further described in detail below through examples, but the present invention is not limited only to the following examples.
[0014] In this embodiment, a conventional DC inverter air conditioner is taken as an example to detect whether the PFC of the controller is faulty, and the specific processing steps are as follows:
[0015] (1) The DC bus voltage detection overvoltage value Up (fixed value) of the DC inverter controller is 380V, and the undervoltage value Ud (fixed value) is 187V. The DC bus voltage detection circuit on the DC inverter air conditioner controller detects the DC voltage U;
[0016] (2) When U≤Ud or U≥Up, the compressor stops immediately and reports an undervoltage protection fault;
[0017] (3) It is tested that the maximum DC voltage Umax is 330V and the minimum DC voltage Umin is 260V when the PFC is normally regulated within the allowable voltage range;
[0018] (4) When the DC bus voltage works at Umin≤U≤Umax, it is ...
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