Inverter control device and electric vehicle thereof
First Claim
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1. An inverter control device, comprising:
- a capacitor smoothing a DC power source voltage that is output from a battery;
a main inverter circuit driving a motor by converting a DC power smoothed by said capacitor into a three-phase AC power;
a switch configured to open and close a connection of said battery and said capacitor; and
a control circuit discharging a charge accumulated on said capacitor when said connection between said battery and said capacitor is disconnected by said switch, by controlling said main inverter circuit to apply a high-frequency voltage to a stator winding of said motor.
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Abstract
In a discharge control section of an inverter control device, when the connection of the battery and the smoothing capacitor is disconnected by means of a contactor, the charge accumulated on the smoothing capacitor is discharged by applying high-frequency voltage to the stator windings of the motor by controlling the main inverter circuit.
68 Citations
26 Claims
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1. An inverter control device, comprising:
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a capacitor smoothing a DC power source voltage that is output from a battery; a main inverter circuit driving a motor by converting a DC power smoothed by said capacitor into a three-phase AC power; a switch configured to open and close a connection of said battery and said capacitor; and a control circuit discharging a charge accumulated on said capacitor when said connection between said battery and said capacitor is disconnected by said switch, by controlling said main inverter circuit to apply a high-frequency voltage to a stator winding of said motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 19, 20)
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11. An inverter control device, comprising:
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a capacitor smoothing a DC power source voltage that is output from a battery; a main inverter circuit driving a motor by converting a DC power smoothed by said capacitor into a three-phase AC power; a switch configured to open and close a connection of said battery and said capacitor; and a control circuit discharging a charge accumulated on said capacitor when said connection between said battery and said capacitor is disconnected by said switch, by performing switching so that a minute short-circuiting current flows during ON/OFF changeover of an upper arm and lower arm of said main inverter circuit. - View Dependent Claims (21, 25)
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12. An inverter control device, comprising:
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a capacitor smoothing a DC power source voltage that is output from a battery; a main inverter circuit driving a motor by converting a DC power smoothed by said capacitor into a three-phase AC power; a switch configured to open and close a connection of said battery and said capacitor; a control circuit for discharging a charge accumulated on said capacitor when said connection between said battery and said capacitor is disconnected by said switch, by allowing a short-circuiting current to flow between an upper arm and lower arm by simultaneously turning ON all switching elements constituting said main inverter circuit. - View Dependent Claims (22, 26)
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15. An electric vehicle incorporating an inverter control device, said inverter control device comprising:
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(a) a capacitor smoothing a DC power source voltage that is output from a battery; (b) a main inverter circuit driving a motor by converting a DC power smoothed by said capacitor into a three-phase AC power; (c) a switch configured to open and close a connection of said battery and said capacitor; and (d) a control circuit discharging a charge accumulated on said capacitor when said connection between said battery and said capacitor is disconnected by said switch, by controlling said main inverter circuit to apply a high-frequency voltage to a stator winding of said motor. - View Dependent Claims (18)
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16. An electric vehicle incorporating an inverter control device, said inverter control device comprising:
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(a) a capacitor smoothing a DC power source voltage that is output from a battery; (b) a main inverter circuit driving a motor by converting a DC power smoothed by said capacitor into a three-phase AC power; (c) a switch configured to open and close a connection of said battery and said capacitor; and (d) a control circuit for discharging a charge accumulated on said capacitor when said connection between said battery and said capacitor is disconnected by said switch, by performing switching so that a minute short-circuiting current flows during ON/OFF changeover of an upper arm and lower arm of said main inverter circuit. - View Dependent Claims (23)
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17. An electric vehicle incorporating an inverter control device, said inverter control device comprising:
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(a) a capacitor smoothing a DC power source voltage that is output from a battery; (b) a main inverter circuit driving a motor by converting a DC power smoothed by said capacitor into a three-phase AC power; (c) a switch configured to open and close a connection of said battery and said capacitor; and (d) a control circuit discharging a charge accumulated on said capacitor when said connection between said battery and said capacitor is disconnected by said switch, by allowing a short-circuiting current to flow between an upper arm and lower arm by simultaneously turning ON all switching elements constituting said main inverter circuit. - View Dependent Claims (24)
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Specification