| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyphase power conversion circuit that controls phases of current with the use of a single current sensor.SOLUTION: The polyphase power conversion circuit includes a controller for capturing an output current ih and an output voltage vh measured on a high voltage side, and outputting driving signals to gates of switches. The controller includes: a generator for outputting a sampling signal and carriers synchronous with the sampling signal; an inductor current estimator for sampling and operating on the output current ih on the generated sampling signal to estimate phase output currents flowing through inductors; and a PWM circuit for receiving the output voltage vh, the estimated phase output currents, and the carriers, and adjusting switch-specific phases of turning on/off the switches. |
