ELECTRIC VEHICLE POWER CONVERSION SYSTEM
First Claim
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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 an inverter circuit; and
a control circuit to control the motor driving power system, wherein;
the motor driving power system is to connect a smoothing condenser for smoothing the DC voltage, a resistor, and a semiconductor switch element in series,the motor driving power system includes an exclusive discharge circuit to discharge stored charge from the 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 smoothing condenser through parasitic resistance components of the upper and lower arms.
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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.
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Citations
20 Claims
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1. An electric vehicle power conversion system, comprising:
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a motor driving power system to output a DC voltage from a DC main power supply to a motor generator through an inverter circuit; and a control circuit to control the motor driving power system, wherein; the motor driving power system is to connect a smoothing condenser for smoothing the DC voltage, a resistor, and a semiconductor switch element in series, the motor driving power system includes an exclusive discharge circuit to discharge stored charge from the 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 smoothing condenser through parasitic resistance components of the upper and lower arms. - View Dependent Claims (2, 3, 4)
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5. An apparatus, comprising:
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an input coupled to a circuit; and a controller to control discharge of a smoothing condenser based on at least one signal received through the input, the at least one signal indicating failure of a discharge circuit configured to discharge the smoothing condenser, the controller to control discharge of stored charge in the smoothing condenser through parasitic resistance components of a power system which includes the smoothing condenser. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus, comprising:
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a first discharge circuit; a second discharge circuit; and a controller to control discharge of a charge storage device through one of the first discharge circuit or the second discharge circuit, wherein the controller is to control discharge of the charge storage device through the first discharge circuit when the first discharge circuit does not have a failure and is to control discharge of the charge storage device through the second discharge circuit when the first discharge circuit has a failure, and wherein the charge storage device is discharged through the second discharge circuit along a path that bypasses the first discharge circuit. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification