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;
switching means for opening and closing 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 switching means, 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.
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Citations
18 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;
switching means for opening and closing 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 switching means, 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)
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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;
switching means for opening and closing 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 switching means, 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.
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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;
switching means for opening and closing 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 switching means, by allowing a short-circuiting current to flow between an upper arm and lower arm by simultaneously turning all of switching elements constituting said main inverter circuit ON.
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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) switching means for opening and closing 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 switching means, 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) switching means for opening and closing 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 switching means, 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.
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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) switching means for opening and closing 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 switching means, by allowing a short-circuiting current to flow between an upper arm and lower arm by simultaneously turning all of switching elements constituting said main inverter circuit ON.
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Specification