Patent ID: 9729042
Date: 2017-08-08
CPC Classifications: H02M,H03K

Claim:
1. A power supply apparatus for a power converter including a plurality of upper-arm switching elements and a plurality of lower-arm switching elements, the power supply apparatus comprising: a board; an upper-arm power supply circuit mounted to the board, the upper-arm power supply circuit comprising a plurality of upper-arm transformers connected to a DC power source and to the respective upper-arm switching elements, each of the upper-arm transformers being configured to generate, based on an output voltage of the DC power source, a first voltage for driving a corresponding one of the upper-arm switching elements; a lower-arm power supply circuit mounted to the board, the lower-arm power supply circuit comprising at least one lower-arm transformer connected to the DC power source and to the lower-arm switching elements, the at least one lower-arm transformer being configured to generate, based on the output voltage of the DC power source, a second voltage for driving each of the lower-arm switching elements; an upper-arm control unit mounted to the board, the upper-arm control unit comprising a first voltage-controlled switching element connected between the DC power source and a primary side of each of the upper-arm transformers, the upper-arm control unit controlling on and off operations of the first voltage-controlled switching element to thereby control supply of the output voltage of the DC power source to the primary side of each of the upper-arm transformers; and a lower-arm control unit mounted to the board, the lower-arm control unit comprising a second voltage-controlled switching element connected between the DC power source and a primary side of the at least one lower-arm transformer, the lower-arm control unit controlling on and off operations of the second voltage-controlled switching element to thereby control supply of the output voltage of the DC power source to the primary side of the at least one lower-arm transformers, each of the upper-arm transformers being arranged adjacent to the upper-arm control unit, the at least one lower-arm transformer being arranged adjacent to the lower-arm control unit.