Motor control apparatus and control method thereof
First Claim
1. A motor control apparatus supplying AC power to a motor having a plurality of motor windings, comprising:
- an inverting part comprising;
a bridge circuit having a plurality of first and second switching units, and supplying the AC power to the motor;
brake relays short circuiting the motor windings by turning on when the motor brakes;
brake resistors, respectively, connected to the plurality of motor windings and consuming an overcurrent generated by the motor when the brake relays short circuit the plurality of motor windings; and
a switching controller turning on and turning off one of the first and second switching units provided in respective opposite ends of the inverting part so that the overcurrent consumed by the brake resistors is changeable in proportion to a rotation speed of the motor, when the brake relays short circuit the plurality of motor windings.
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Accused Products
Abstract
A motor control apparatus supplying AC power to a motor having a plurality of motor windings having an inverting part including a bridge circuit having a plurality of switching units, and supplying the AC power to the motor; brake relays short circuiting the motor windings by turning on when the motor brakes; brake resistors, respectively, connected to the motor windings and consuming an overcurrent generated from the motor when the brake relays short circuit the motor windings; and a switching controller turning on and turning off the switching units provided in one of opposite ends of the inverting part so that the overcurrent consumed by the brake resistors is changeable in proportion to a rotation speed of the motor, when the brake relays short circuit the motor windings to improve an effect of a dynamic braking operation and to prevent breakdown thereof.
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Citations
29 Claims
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1. A motor control apparatus supplying AC power to a motor having a plurality of motor windings, comprising:
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an inverting part comprising;
a bridge circuit having a plurality of first and second switching units, and supplying the AC power to the motor;
brake relays short circuiting the motor windings by turning on when the motor brakes;
brake resistors, respectively, connected to the plurality of motor windings and consuming an overcurrent generated by the motor when the brake relays short circuit the plurality of motor windings; and
a switching controller turning on and turning off one of the first and second switching units provided in respective opposite ends of the inverting part so that the overcurrent consumed by the brake resistors is changeable in proportion to a rotation speed of the motor, when the brake relays short circuit the plurality of motor windings. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control method of a motor control apparatus having an inverting part comprising a bridge circuit including a plurality of first and second switching units, and supplying AC power to a plurality of motor windings of a motor, and brake resistors connected to the plurality of motor windings and consuming an overcurrent generated from the motor when the motor brakes, comprising:
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braking the motor by short circuiting the plurality of motor windings; and
turning on and turning off one of the first and second switching units provided in respective opposite ends of the inverting part so that the overcurrent consumed by the brake resistors is changeable according to a rotation speed of the motor. - View Dependent Claims (8, 9)
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10. A motor control apparatus supplying AC power to a motor having a plurality of motor windings, comprising:
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an inverting part including a plurality of first and second switching units to supply the AC power to the motor;
brake relays short circuiting the motor windings when the motor brakes;
brake resistors, respectively, connected to the plurality of motor windings to control an overcurrent generated by the motor when the brake relays short circuit the plurality of motor windings by selectively switching the plurality of first and second switching units; and
a controller to control the plurality of first and second switching units in accordance with a rotation speed of the motor, when the brake relays short circuit the plurality of motor windings.
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11. A motor control apparatus supplying AC power to a motor having a plurality of motor windings, comprising:
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an inverting part having a plurality of first and second switching units to supply the AC power to the motor;
brake relays short circuiting the motor windings by turning on when the motor brakes;
brake resistors, respectively, connected to the plurality of motor windings to exhaust power from an overcurrent generated by the motor when the brake relays short circuit one or more of the plurality of motor windings; and
a controller to turn on and turn off one of the plurality of first and second switching units so that the power exhausted by the brake resistors corresponds to a rotation speed of the motor, when the brake relays short circuit the one or more of the plurality of motor windings.
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12. A motor control apparatus supplying power to a motor having a plurality of motor windings, comprising:
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a plurality of first and second switching units to supply AC power to the motor;
brake resistors, respectively, connected to the plurality of motor windings to exhaust power from an overcurrent generated by the motor; and
a controller to control selective ones of the plurality of first and second switching units so that the power exhausted by the brake resistors corresponds to a rotation speed of the motor.
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13. A motor control apparatus supplying power to a motor having a plurality of motor windings, comprising:
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a plurality of switching units to supply AC power to the motor;
brake resistors, respectively, connected to the plurality of motor windings to exhaust power from an overcurrent generated by the motor; and
a controller to control selected ones of the plurality of switching units so that the power exhausted by the brake resistors corresponds to a rotation speed of the motor. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 25)
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22. A method of controlling a motor, comprising:
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supplying power to the motor by a plurality of first and second switching units;
short circuiting the motor windings when braking the motor;
connecting brake resistors, respectively, to the plurality of motor windings; and
controlling an overcurrent generated by the motor when short circuiting the plurality of motor windings by selectively switching the plurality of first and second switching units in accordance with a rotation speed of the motor. - View Dependent Claims (23, 24)
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26. A method of controlling a motor, comprising:
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supplying power to the motor by a plurality of first and second switching units;
short circuiting the motor windings when braking the motor;
connecting brake resistors, respectively, to the plurality of motor windings; and
exhausting power by the brake resistors corresponds to a rotation speed of the motor, when short circuiting one or more of the plurality of motor windings.
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27. A method of controlling a motor, comprising:
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supplying power to the motor by a plurality of first and second switching units;
connecting brake resistors, respectively, to a plurality of motor windings and exhausting power from an overcurrent generated by the motor; and
controlling selected ones of the plurality of first and second switching units so that the power exhausted by the brake resistors corresponds to a rotation speed of the motor.
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28. A method of controlling a motor, comprising:
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supplying power to the motor by a plurality of switching units; and
exhausting power from an overcurrent generated by the motor by controlling selected ones of the plurality of switching units so that the power exhausted by the brake resistors corresponds to a rotation speed of the motor.
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29. A method of controlling a motor, comprising:
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supplying power to the motor;
detecting a rotation speed of the motor braking the motor; and
consuming an overcurrent according to the rotation speed of the motor when braking the motor.
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Specification