An Analog Encoder for Precise Angle Control of SRM

Jin-Woo Ahn; Sung-Jun Park

An Analog Encoder for Precise Angle Control of SRM

Jin-Woo Ahn

Sung-Jun Park

Vol. 3, No. 3, pp. 167-174, Jul. 2003

10.6113/JPE.2003.3.3.167

SRM

Analog encoder

Switching Angle Control

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Abstract

In a switched reluctance motor drive, it is important to synchronize the stator phase excitation with the rotor position, because the position of rotor is an essential information. Although high resolution optical encoders or resolvers are used to provide a precise position information, these sensors are expensive. Moreover, in the high-speed region, switching angles are fluctuated back and forth out of the preset value, which is caused by the sampling period of the microprocessor. In this paper, a low cost analog encoder suitable for practical applications is proposed. And the control algorithm to generate switching signals using a Simple digital logic is presented. The validity of the proposed analog encoder with a proper logic controller is verified from the experiments.

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Cite this article

[IEEE Style]

J. Ahn and S. Park, "An Analog Encoder for Precise Angle Control of SRM," Journal of Power Electronics, vol. 3, no. 3, pp. 167-174, 2003. DOI: 10.6113/JPE.2003.3.3.167.

[ACM Style]

Jin-Woo Ahn and Sung-Jun Park. 2003. An Analog Encoder for Precise Angle Control of SRM. Journal of Power Electronics, 3, 3, (2003), 167-174. DOI: 10.6113/JPE.2003.3.3.167.