Comparison on Sensorless Control of Synchronous Motors
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The paper compares two different methods for speed and position estimation in AC permanent magnet synchronous motors vector control applications. The first method implies two observer blocks — one for the speed, and the other for the electrical position, using the voltage equations in the (d,q) reference frames. The second method estimates the same variables starting from the calculation of instantaneous reactive power. The tests have proved excellent behaviour in steady state (method 1) as well as in transient state (method 2). The implementation has been made on the 16 bits fixed-point DSP - TMS320F240 from Texas Instruments.
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