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Practical implementation of the sensorless field oriented control of a PMSM for wide speed range.
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| Author(s) |
PETZOLDT JueRgen; PERASSI Hector; BERGER Gotthard |
| Abstract |
The aim of this paper is to present the implementation of the sensorless field oriented control of a surface mounted permanent magnet machine for wide speed range. From standstill up to a certain low speed range a high-frequency carrier signal based model is employed. The injected test signal is a rotating voltage vector in the stator reference frame and the rotor angle is estimated by filtering and demodulating of the resultant high frequency currents. A modified PWM signal generation algorithm is implemented to extremely reduce the dead-time, in order to overcome the effects of the inverter non-linearity in the estimation process. A hybrid flux estimator based on the voltage model of the machine, dominating at higher speed, is used combined with the signal injection model. Even a smooth transition between them is achieved. The experimental measurements show the effective performance of the position estimation method, which is implemented on a low cost fixed-point DSP. |
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| Filename: | 0585 |
| Filesize: | 460.9 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-12 by System |
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