Controlling method of a motor state
First Claim
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1. 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:
- 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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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.
5 Citations
2 Claims
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1. 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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2. 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
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Current AssigneeDelta Electronics Incorporated
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Original AssigneeDelta Electronics Incorporated
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InventorsHsieh, Ting-Chung, Liao, Shih-Chieh
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Primary Examiner(s)Ro, Bentsu
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Application NumberUS11/201,433Publication NumberTime in Patent Office439 DaysField of Search318/376, 318/503, 318/504, 318/459US Class Current318/376CPC Class CodesH02P 27/06 using dc to ac converters o...
