发明名称 |
A multi-speed motor controller |
摘要 |
<p>Three phase sinusoidal waveforms generated from a DC bus voltage using Space Vector PWM method, are used to obtain multi-speeds from a 3 Phase AC Induction motor. A novel algorithm generates the switching signals from a micro controller to drive the power devices of the Inverter Bridge, the output of which is applied to the motor. At different speeds, below the rated value, the output voltage V and the frequency f are maintained to keep V/f constant so that the motor torque is kept constant. At above the rated voltage of the motor, only the frequency is increased to obtain constant output from the motor at increased speeds. <IMAGE> <IMAGE></p> |
申请公布号 |
EP1081842(A1) |
申请公布日期 |
2001.03.07 |
申请号 |
EP19990307478 |
申请日期 |
1999.09.21 |
申请人 |
RAMARATHNAM, RAMACHANDRAN |
发明人 |
RAMARATHNAM, RAMACHANDRAN |
分类号 |
H02M7/5387;H02P27/08;(IPC1-7):H02M7/538 |
主分类号 |
H02M7/5387 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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