Patent ID: 9595890
Date: 2017-03-14
CPC Classifications: H02M,Y02B

Claim:
1. A switching control apparatus applied to a load drive system that includes controlling a switching of the switching element in the DC voltage converter and the switching element pairs in the power transducer, the switching control apparatus comprising: a DC voltage converter control circuit calculating a control amount of the DC voltage converter according to a command voltage to the output voltage of the DC voltage converter; a DC voltage converter drive circuit driving the switching element in the DC voltage converter according to the control amount of the DC voltage converter calculated by the DC voltage converter control circuit; a power transducer control circuit calculating a control amount of the power transducer according to a required output that the load requests; a power transducer drive circuit driving the switching element pairs in the power transducer according to the control amount of the power transducer calculated by the power transducer control circuit; a switching prohibition period calculation portion calculating a switching prohibition period of the switching element in the DC voltage converter or the switching element pairs in the power transducer, wherein a switching correction portion determining a correction direction of a correction object switching time and correcting the correction object switching time to the correction direction, wherein when the first switching time of the at least one of the switching element pairs in the power transducer or the second switching time of the at least one switching element in the DC voltage converter is predicted to be included in the switching prohibition period, the first switching time or the second switching time correspond to the correction object switching time, the switching correction portion determines the correction direction of the correction object switching time and determines whether the correction object switching time is advanced to an initiation of the switching prohibition period or the correction object switching time is delayed to an end of the switching prohibition period, when the switching correction portion determines the correction direction, the switching correction portion corrects the correction object switching time a determined correction direction.