Input current detection method and device of bridgeless pfc circuit
A technology of input current and detection device, applied in measurement device, output power conversion device, measurement current/voltage and other directions, can solve problems such as difficulty in sampling AC input current, and achieve the effect of reducing sampling difficulty
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] The input current detection device of the bridgeless PFC circuit of the present invention mainly includes two parts, namely: a current detection part and a calculation control part.
[0031] The bridgeless PFC circuit is connected between an AC power source and a load. In order to detect the input current in the bridgeless PFC circuit, that is, to detect the inductor current in the bridgeless PFC circuit, the present invention connects the positive half cycle shunt unit and The negative half-cycle shunt unit is used as the current detection part, so that in the positive half-cycle loop, the...
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