The Simplified DSP/CPLD-Based Resistor Compensation for the Induction Motor under Low Frequency Operation
碩士 === 國立交通大學 === 電機與控制工程系 === 87 === This thesis presents a newly simplified design of the resistor compensation of the induction motor under the load at the low speed. The simplified compensation and realization based on the space-vector PWM are also presented by using the CPLD and DSP...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
1999
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| Online Access: | http://ndltd.ncl.edu.tw/handle/19920769574435013457 |
| Summary: | 碩士 === 國立交通大學 === 電機與控制工程系 === 87 === This thesis presents a newly simplified design of the resistor compensation of the induction motor under the load at the low speed. The simplified compensation and realization based on the space-vector PWM are also presented by using the CPLD and DSP chips. Under the load change situation, the voltage utilization of this compensation method is well controlled. It also reduces the current harmonic and the switching loss by using the optimal space-vector PWM in this study. The V/f concept is used for deriving the relation between the compensated voltage and the modulation inside the space-vector PWM. With the measured stator resistor of the induction motor, the proposed system only requires one-line stator current feedback to achieve the compensation. It is shown that by using the proposed method, the speed of the induction motor can be controlled down to 1.5Hz with more than 5 times load torque than that before compensation.
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