Vehicle-mounted motor driving control board

摘要

An object of the present invention is to achieve reductions in size and costs of a vehicle-mounted motor driving control board in a configuration which allows the redundancy of a power supply to be ensured. The vehicle-mounted motor driving control board is formed by one printed circuit board on which are formed two inverter driving circuits for driving two inverter circuits for three-phase motors, and a voltage step-up/step-down driving circuit for driving a voltage step-up/step-down circuit for supplying electric power to the inverter circuits. The vehicle-mounted motor driving control board further includes a first power supply circuit for supplying electric power to part of constituent circuits constituting the voltage step-up/step-down driving circuit and the two inverter driving circuits, and a second power supply circuit for supplying electric power to the remainder of the constituent circuits in the voltage step-up/step-down driving circuit and the two inverter driving circuits.

主权项

1. A vehicle-mounted motor driving control board formed by one printed circuit board and including a circuit formed thereon which drives two inverter circuits connected respectively to two three-phase motors mounted on a vehicle and a voltage step-up/step-down circuit for supplying electric power to the inverter circuits, the vehicle-mounted motor driving control board comprising:
a voltage step-up/step-down driving circuit for driving said voltage step-up/step-down circuit; a first inverter driving circuit for driving one of said two inverter circuits; a second inverter driving circuit for driving the other of said two inverter circuits; a first power supply circuit for supplying electric power to part of constituent circuits constituting said voltage step-up/step-down driving circuit, said first inverter driving circuit and said second inverter driving circuit; and a second power supply circuit for supplying electric power to the remainder of said constituent circuits constituting said voltage step-up/step-down driving circuit, said first inverter driving circuit and said second inverter driving circuit, wherein: said voltage step-up/step-down driving circuit includes an N-phase voltage step-up/step-down driving circuit that is one of said constituent circuits for driving a circuit for generating an N-phase potential in said voltage step-up/step-down circuit, and a P-phase voltage step-up/step-down driving circuit that is one of said constituent circuits-for driving a circuit for generating a P-phase potential in said voltage step-up/step-down circuit; said first power supply circuit supplies electric power to one of said N-phase voltage step-up/step-down driving circuit and said P-phase voltage step-up/step-down driving circuit and to all of said constituent circuits constituting said first inverter driving circuit; and said second power supply circuit supplies electric power to the other of said N-phase voltage step-up/step-down driving circuit and said P-phase voltage step-up/step-down driving circuit and to all of said constituent circuits constituting said second inverter driving circuit.