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IPFC-Slide9

The difference between an Interleaved PFC and a single stage PFC is that two inductors are used for energy storage. Since energy should be distributed equally, a load balancing controller is added to the interleaved PFC to make sure the system compensates for variation in inductance values or feedback circuits. The Interleaved PFC system has three main compensators: one for voltage, one for current, and one for load balance. Additionally, a feed-forward controller is implemented to compensate for sudden input voltage changes. The voltage error controller makes sure that the output voltage is not affected by load variations. The inputs to this controller are DC output voltage and the corresponding reference. The output of this controller is the current compensator reference.

PTM Published on: 2011-11-07