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A sensorless drive by applying test pulses without affecting the average-current samples

Frederik De Belie (UGent) , Peter Sergeant (UGent) and Jan Melkebeek (UGent)
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Abstract
The rotor position of a salient-pole permanent-magnet synchronous machine (PMSM) at standstill or rotating at low speed is often estimated by measuring the responses on high-frequency test signals. In some drives, the rotor position is computed by measuring important current ripples that are generated by supplying the PMSM periodically with high-frequency voltage test pulses. Besides these ripples, undesired distortions in the average-current samples have been measured. Simulation results have revealed that these distortions are caused by a test signal, as it produces a nonzero voltage deviation from the steady-state stator voltage. In this paper, a low-speed sensorless strategy is discussed where a strong reduction of the aforementioned distortions is obtained by adapting the test signals to the steady-state stator voltage. The main assumption is that an accurate estimation of the steady-state voltage is made by using the controller output. The computation of the adaptive test signals is done by taking into account the voltage restriction of the dc-bus voltage. Simulation results, as well as experimental measurements, indicate the effectiveness of the adaptive test signals in a sensorless controlled interior PMSM.
Keywords
SIGNAL-INJECTION, MOTOR-DRIVES, POSITION ESTIMATION, MAGNETIC SATURATION, SYNCHRONOUS MACHINES, ZERO-SPEED, Current control, high-frequency signal injection, permanent-magnet machines, position estimation, sensorless control

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Citation

Please use this url to cite or link to this publication:

Chicago
De Belie, Frederik, Peter Sergeant, and Jan Melkebeek. 2010. “A Sensorless Drive by Applying Test Pulses Without Affecting the Average-current Samples.” Ed. Frederik De Belie. Ieee Transactions on Power Electronics 25 (4): 875–888.
APA
De Belie, F., Sergeant, P., & Melkebeek, J. (2010). A sensorless drive by applying test pulses without affecting the average-current samples. (F. De Belie, Ed.)IEEE TRANSACTIONS ON POWER ELECTRONICS, 25(4), 875–888.
Vancouver
1.
De Belie F, Sergeant P, Melkebeek J. A sensorless drive by applying test pulses without affecting the average-current samples. De Belie F, editor. IEEE TRANSACTIONS ON POWER ELECTRONICS. 2010;25(4):875–88.
MLA
De Belie, Frederik, Peter Sergeant, and Jan Melkebeek. “A Sensorless Drive by Applying Test Pulses Without Affecting the Average-current Samples.” Ed. Frederik De Belie. IEEE TRANSACTIONS ON POWER ELECTRONICS 25.4 (2010): 875–888. Print.
@article{923218,
  abstract     = {The rotor position of a salient-pole permanent-magnet
synchronous machine (PMSM) at standstill or rotating at low speed is often estimated by measuring the responses on high-frequency test signals. In some drives, the rotor position is computed by measuring important current ripples that are generated by supplying the PMSM periodically with high-frequency voltage test pulses. Besides these ripples, undesired distortions in the average-current samples have been measured. Simulation results have revealed that these distortions are caused by a test signal, as it produces a nonzero voltage deviation from the steady-state stator voltage. In this paper, a low-speed sensorless strategy is discussed where a strong reduction of the aforementioned distortions is obtained by adapting the test signals to the steady-state stator voltage. The main assumption is that an accurate estimation of the steady-state voltage is made by using the controller output. The computation of the adaptive test signals is done by taking into account the voltage restriction of the dc-bus voltage. Simulation results, as well as experimental measurements, indicate the effectiveness of the adaptive test signals in a sensorless controlled interior PMSM.},
  author       = {De Belie, Frederik and Sergeant, Peter and Melkebeek, Jan},
  editor       = {De Belie, Frederik},
  issn         = {0885-8993},
  journal      = {IEEE TRANSACTIONS ON POWER ELECTRONICS},
  keywords     = {SIGNAL-INJECTION,MOTOR-DRIVES,POSITION ESTIMATION,MAGNETIC SATURATION,SYNCHRONOUS MACHINES,ZERO-SPEED,Current control,high-frequency signal injection,permanent-magnet machines,position estimation,sensorless control},
  language     = {eng},
  number       = {4},
  pages        = {875--888},
  title        = {A sensorless drive by applying test pulses without affecting the average-current samples},
  url          = {http://dx.doi.org/10.1109/TPEL.2009.2036617},
  volume       = {25},
  year         = {2010},
}

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