CONTROLLING METHOD OF A MOTOR STATE
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Accused Products
Abstract
A controlling method of a motor state described herein detects the motor operation in a regeneration state or a motor state. The output frequency value of an AC motor drive is calculated and adjusted to stabilize the voltage of a DC bus such that over-voltage protection is avoided. Therefore, a stable load current is obtained and the time for slowing down the motor is shortened.
7 Citations
8 Claims
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1-6. -6. (canceled)
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7. A controlling method of a motor state that adjusts an output frequency of an AC motor drive to control an operation state of the motor, comprising the steps of:
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determining the operation state of the motor;
driving the motor according to a first frequency to change the operation state of the motor into a motor state;
adjusting the output frequency to a second frequency when the motor is in the motor state, wherein the second frequency is the sum of the output frequency and a frequency adjustment, and the frequency adjustment is computed according to a setting time for acceleration; and
driving the motor according to the second frequency.
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8. A controlling method of a motor state that adjusts an output frequency of an AC motor drive to control an operation state of the motor, comprising the steps of:
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determining the operation state of the motor;
driving the motor according to a first frequency to change the operation state of the motor into a motor state;
adjusting the output frequency to a second frequency when the motor is in the motor state wherein the second frequency is the sum of the output frequency and a frequency adjustment, and the frequency adjustment is computed according to a setting time for deceleration; and
driving the motor according to the second frequency.
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Specification