ELECTRIC POWERED VEHICLE AND ITS CONTROL METHOD
First Claim
1. An electric powered vehicle, comprising:
- an AC electric motor generator having a rotor with a magnet attached, and configured to allow alternate transmission of rotating force to/from a wheel;
an inverter device having a plurality of power semiconductor switching elements, and configured to convert a DC voltage of a power source to a driving voltage for said AC electric motor generator;
a controller for controlling said inverter device;
a shift position selecting unit for selecting one of a plurality of shift positions including at least a parking position, in accordance with an operation by a driver;
a parking lock mechanism activated when said parking position is selected; and
a power source position selecting unit for selecting one of a plurality of power source positions determining a group of devices to be objects of power supply among devices mounted on the vehicle, in accordance with an operation by the driver;
whereinsaid plurality of power source positions include a first power source position allowing control of said power semiconductor switching element by said controller and a second power source position not allowing said control;
said electric powered vehicle further comprisingan overlapped state avoiding unit for avoiding a state in which selection of said second power source position and selection of a shift position at which said parking lock mechanism is inactive are overlapped, when a short-circuit failure of any of said plurality of power semiconductor switching elements has been detected.
1 Assignment
0 Petitions
Accused Products
Abstract
A shift position of an electric powered vehicle is selected by operating a shift lever and a P position switch. A power source position is selected by operating a power switch. When any of switching elements forming an inverter device is short-circuited, selection of the shift position and the power source position is controlled such that simultaneous selection of a power source position at which inverter control is turned off and a shift position at which a parking lock mechanism is inactivated can be avoided. Therefore, inverter control for reducing short-circuit current caused by back electromotive force derived from rotation of a motor generator after occurrence of short-circuit failure can reliably be executed.
-
Citations
14 Claims
-
1. An electric powered vehicle, comprising:
-
an AC electric motor generator having a rotor with a magnet attached, and configured to allow alternate transmission of rotating force to/from a wheel; an inverter device having a plurality of power semiconductor switching elements, and configured to convert a DC voltage of a power source to a driving voltage for said AC electric motor generator; a controller for controlling said inverter device; a shift position selecting unit for selecting one of a plurality of shift positions including at least a parking position, in accordance with an operation by a driver; a parking lock mechanism activated when said parking position is selected; and a power source position selecting unit for selecting one of a plurality of power source positions determining a group of devices to be objects of power supply among devices mounted on the vehicle, in accordance with an operation by the driver;
whereinsaid plurality of power source positions include a first power source position allowing control of said power semiconductor switching element by said controller and a second power source position not allowing said control; said electric powered vehicle further comprising an overlapped state avoiding unit for avoiding a state in which selection of said second power source position and selection of a shift position at which said parking lock mechanism is inactive are overlapped, when a short-circuit failure of any of said plurality of power semiconductor switching elements has been detected. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of controlling an electric powered vehicle, wherein
said electric powered vehicle includes an AC electric motor generator having a rotor with a magnet attached, and configured to allow alternate transmission of rotating force to/from a wheel, an inverter device having a plurality of power semiconductor switching elements, and configured to convert a DC voltage of a power source to a driving voltage for said AC electric motor generator, a controller for controlling said inverter device, a shift position selecting unit for selecting one of a plurality of shift positions including at least a parking position, in accordance with an operation by a driver, a parking lock mechanism activated when said parking position is selected, and a power source position selecting unit for selecting one of a plurality of power source positions determining a group of devices to be objects of power supply among devices mounted on the vehicle, in accordance with an operation by the driver; - and wherein
said plurality of power source positions include a first power source position allowing control of said power semiconductor switching element by said controller and a second power source position not allowing said control; said control method comprising the steps of; determining whether or not a short-circuit failure of any of said plurality of power semiconductor switching elements has been detected; and avoiding, when it is determined that said short-circuit failure has been detected, a state in which selection of said second power source position and selection of a shift position at which said parking lock mechanism is inactivated, are overlapped. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- and wherein
Specification