POWER CONVERSION CIRCUIT BOARD AND ELECTRIC COMPRESSOR

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Quick Facts

Patent No.: US None
App. No.: 15/567,283

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Abstract

A power conversion circuit board ( 1 ) is a circuit board on which a power conversion circuit configured to convert a direct current into an alternating current is mounted. A low-voltage circuit ( 10 b ) to which a low voltage is applied and a high-voltage circuit ( 10 a ) to which a high voltage is applied are separately disposed in different areas on the same circuit board surface. Furthermore, part of wiring of the high-voltage circuit ( 10 a ) is formed on the circuit board surface, and the other wiring is constituted by a bus bar provided at a predetermined distance from the circuit board surface.

Claims (35)

1 - 7 . (canceled)

8 . A power conversion circuit board that is a circuit board on which a power conversion circuit configured to convert a direct current into an alternating current is mounted, wherein

a low-voltage circuit to which a low voltage is applied and a high-voltage circuit to which a high voltage is applied are disposed in different areas on the same circuit board surface,

fixing holes are formed at least in four corners of the circuit board surface and in an area other than the four corners, and a grounding land provided at an edge of each of the fixing holes is formed,

the high-voltage circuit includes series capacitor groups each formed of a plurality of capacitor elements connected in series between power source wiring and ground wiring, and

a position grounded through the grounding land provided at the edge of each of the fixing holes is close to a position connected to a series capacitor group of the series capacitor groups on the ground wiring in the high-voltage circuit.

9 . The power conversion circuit board according to claim 8 , wherein

the series capacitor groups are mounted in the same positions on each of a front surface side and a back surface side of the circuit board, and

two groups of the series capacitor groups mounted in the same positions on the front surface side and the back surface side are mounted with the plurality of capacitor elements having the same arrangement pattern.

10 . The power conversion circuit board according to claim 8 , wherein

wiring of the high-voltage circuit from high-voltage input terminals to switching elements is formed on the circuit board surface while wiring of the high-voltage circuit from the switching elements to high-voltage output terminals is constituted by a bus bar provided at a predetermined distance from the circuit board surface.

11 . The power conversion circuit board according to claim 10 , wherein

the wiring from the high-voltage input terminals to the switching elements and the wiring from the switching elements to the high-voltage output terminals are disposed crossing with each other.

12 . An electric compressor, comprising:

the power conversion circuit board according to claim 8 ; and