Electric vehicle power conversion system
First Claim
Patent Images
1. An electric vehicle power conversion system, comprising:
- a motor driving power system to output a DC voltage from a DC main power supply to a motor generator through a voltage booster circuit and an inverter circuit; and
a control circuit to control the motor driving power system, wherein;
the motor driving power system includes a first smoothing condenser for smoothing the DC voltage, a second smoothing condenser between the voltage booster circuit and the inverter circuit, and an exclusive discharge circuit which includes a resistor connected to a semiconductor switch element in series, the exclusive discharge circuit to discharge stored charge from the first smoothing condenser and the second smoothing condenser,the control circuit includes a discharge controller to simultaneously turn on a first set of upper and lower arms when a failure of the exclusive discharge circuit is detected, the upper and lower arms including power semiconductors of the inverter circuit, andthe discharge controller to discharge the stored charge from the first smoothing condenser and the second smoothing condenser through the voltage booster circuit and through parasitic resistance components of the upper and lower arms.
1 Assignment
0 Petitions
Accused Products
Abstract
A power conversion system includes a controller to control discharge of a smoothing condenser based on at least one signal received through an input. The at least one signal indicates a failure of a discharge circuit configured to discharge the smoothing condenser The controller controls discharge of stored charge in the smoothing condenser through parasitic resistance components of a power system which includes the smoothing condenser. The power conversion system may be used with an electric vehicle.
30 Citations
13 Claims
-
1. An electric vehicle power conversion system, comprising:
-
a motor driving power system to output a DC voltage from a DC main power supply to a motor generator through a voltage booster circuit and an inverter circuit; and a control circuit to control the motor driving power system, wherein; the motor driving power system includes a first smoothing condenser for smoothing the DC voltage, a second smoothing condenser between the voltage booster circuit and the inverter circuit, and an exclusive discharge circuit which includes a resistor connected to a semiconductor switch element in series, the exclusive discharge circuit to discharge stored charge from the first smoothing condenser and the second smoothing condenser, the control circuit includes a discharge controller to simultaneously turn on a first set of upper and lower arms when a failure of the exclusive discharge circuit is detected, the upper and lower arms including power semiconductors of the inverter circuit, and the discharge controller to discharge the stored charge from the first smoothing condenser and the second smoothing condenser through the voltage booster circuit and through parasitic resistance components of the upper and lower arms. - View Dependent Claims (2, 3, 4)
-
-
5. An apparatus, comprising:
-
an input coupled to a circuit including a voltage booster circuit, a discharge circuit, and an inverter circuit; and a controller to control discharge of a smoothing condenser between the voltage booster circuit and the inverter circuit based on at least one signal received through the input, the at least one signal indicating failure of the discharge circuit that is to discharge the smoothing condenser, the controller to control discharge of stored charge in the smoothing condenser through the voltage booster circuit and parasitic resistance components of a power system which includes the smoothing condenser. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
-
Specification