Patent ID: 6642679
Filing Date: 2003-11-04
Classification: B60L,Y02T

Abstract:
A car motor driving apparatus comprising:an electromechanical energy converting section having an inverter section for converting direct current into alternating current and a control circuit for controlling at least the inverter section, said electromechanical energy converting section driving a car-mounted motor by applying a specific voltage output from the inverter section; a main storage battery for supplying power at a battery voltage to the electromechanical energy converting section; a step-up unit connectably or disconnectably arranged between said main storage battery and said electromechanical energy converting section in accordance with the battery voltage from the main storage battery: a power board on which the inverter section is mounted: a control board on which the control circuit is mounted: and a step-up board on which the step-up unit is mounted: wherein a control signal is output from the control circuit to the step-up unit, the battery voltage from the main storage battery is stepped up by the step-up unit, and it is supplied to the electromechanical energy converting section when the step-up unit is mounted on a car body, and a control signal is output from the control circuit to the inverter section and the battery voltage from the main storage battery is supplied to the electromechanical energy converting section without being stepped-up when the step-up unit is not mounted on a car body.