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A motor control apparatus and method are provided. The motor control apparatus may include a power supply device supplying power to a motor, a power control device selectively blocking current supplied to the motor depending on whether or not the current supplied from the power supply device to the

A motor control apparatus and method are provided. The motor control apparatus may include a power supply device supplying power to a motor, a power control device selectively blocking current supplied to the motor depending on whether or not the current supplied from the power supply device to the motor is greater than a reference current value, a controller that controls an intensity of the current supplied from the power supply device to the motor, and a load torque detector that detects a load torque generated by the motor as the motor rotates. The controller controls a maximum value of the current to be supplied to the motor so that the maximum value is less than the reference current value when the maximum value of the load torque detected by the load torque detector is greater than a maximum motor output due corresponding to the reference current value.

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1. A motor control apparatus, comprising: a power supply device that supplies power to a motor;a power control device that selectively blocks a current supplied to the motor when current supplied by the power supply device to the motor is greater than a reference current value;a controller that cont

1. A motor control apparatus, comprising: a power supply device that supplies power to a motor;a power control device that selectively blocks a current supplied to the motor when current supplied by the power supply device to the motor is greater than a reference current value;a controller that controls an intensity of current supplied by the power supply device to the motor; anda load torque detector that detects a load torque generated in the motor when the motor is rotated, wherein the controller includes: a current calculator that calculates current to be supplied to the motor according to a rotation speed of the motor;a torque compensation calculator that calculates a current value to be supplied to the motor to generate a motor output corresponding to the detected load torque; anda correction value calculator that corrects the current value calculated by the torque compensation calculator, wherein, when a maximum value of the load torque detected by the load torque detector is greater than a maximum motor output corresponding to the reference current value, the correction value calculator corrects a maximum value of the current supplied to the motor such that the maximum value of the current is less than the reference current value. 2. The motor control apparatus according to claim 1, wherein, when the maximum value of the load torque detected by the load torque detector is greater than the maximum motor output corresponding to the reference current value, the correction value calculator corrects the current value calculated by the torque compensation calculator to control the motor rotation speed so that an acceleration rate of the motor rotation speed generated for one revolution of the motor is equal to a deceleration rate of the motor rotation speed for one revolution of the motor. 3. The motor control apparatus according to claim 2, wherein the controller further includes a maximum torque comparator configured to compare the maximum value of the load torque detected by the load torque detector to the maximum motor output. 4. The motor control apparatus according to claim 1, wherein the correction value calculator corrects the current value calculated by the torque compensation calculator so that an acceleration rate of the motor rotation speed generated for one revolution of the motor is equal to a deceleration rate of the motor rotation speed generated for the one revolution of the motor. 5. The motor control apparatus according to claim 1, wherein, when the maximum value of the load torque detected by the load torque detector is less than the maximum motor output corresponding to the reference current value, the correction value calculator corrects the current value calculated by the torque compensation calculator such that a current value greater than the value of the current being supplied to the motor is applied to generate a motor output corresponding to the load torque. 6. The motor control apparatus according to claim 4, wherein the correction value calculator corrects the current value calculated by the torque compensation calculator so that two time periods in which the motor rotation speed generated for the one revolution of the motor is accelerated, and acceleration rates of the motor rotation speed for the two time periods are equal. 7. The motor control apparatus according to claim 1, wherein the motor is configured to rotate a rolling piston of a rotary compressor. 8. The motor control apparatus according to claim 1, wherein the power control device includes a switch which is turned off or cut off when the current supplied to the motor is greater than the reference current value. 9. A motor control method, comprising: detecting, by a load torque detector, a load torque acting on a motor as the motor is rotated;determining, by a maximum torque comparator, whether a maximum value of the load torque is greater than a maximum motor output corresponding to a reference current value of a power control device connected to the motor; andperforming corrected torque compensation control when the maximum value of the load torque is greater than the maximum motor output, including: calculating by a torque compensation calculator, a current value to be supplied to the motor so that a motor output generated from the motor corresponds to the load torque acting on the motor;correcting, by a correction value calculator, a maximum value of current flowing into the motor such that the value of the current flowing into the motor is less than the reference current value; andcorrecting, by the correction value calculator, the current value calculated by the torque compensation calculator to control a motor rotation speed such that an acceleration rate of the motor rotation speed generated for one revolution of the motor is equal to a deceleration rate of the motor rotation speed generated for the one revolution of the motor. 10. The motor control method according to claim 9, further including performing torque compensation control when the maximum value of the load torque is less than the maximum motor output, including controlling current supplied to the motor to generate a motor output corresponding to the load torque, thereby rotating the motor at a constant speed. 11. The motor control method according to claim 10, wherein a time period corresponding to the one revolution of the motor includes: a first period from a position at which a vane and a rolling piston meet each other at a suction side to a position at which the load torque acting on the motor reaches the maximum motor output as the rolling piston rotates;a second period from the position at which the load torque reaches the maximum motor output to a position at which the load torque is less than the maximum motor output as the rolling piston rotates; anda third period from the position at which the load torque is less than the maximum motor output to a position at which the vane and the rolling piston meet each other at a discharge side as the rolling piston rotates, wherein performing the corrected torque compensation control includes controlling a value of the current supplied to the motor for the second period so that the current value is less than the reference current value. 12. The motor control method according to claim 11, wherein performing the corrected torque compensation control further includes controlling a value of the current supplied to the motor for the first and third periods so that the current value is greater than the value of the current supplied to the motor when the torque compensation control is performed. 13. The motor control method according to claim 11, wherein performing the corrected torque compensation control includes controlling the current supplied to the motor so that a sum of an acceleration rate of the motor rotation speed for the first period and an acceleration rate of the motor rotation speed for the third period is equal to a deceleration rate of the motor rotation speed for the second period. 14. The motor control method according to claim 11, wherein performing the corrected torque compensation control further includes controlling the current supplied to the motor so that an acceleration rate of the motor rotation speed for the first period and an acceleration rate of the motor rotation speed for the third period are equal.