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A New Detection Method of Slot Harmonics for Speed Sensorless Vector Control of Induction Motors

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3 Author(s)
Kiyotake, H. ; Oita Nat. Coll. of Technol., Oita ; Shinohara, K. ; Katoh, D.

In general, speed sensorless vector control system has a problem that an accurate speed and the torque control become difficult when the rotational speed lowers In this paper, we propose the method to estimate the rotor speed by making a pulse and counting a slot harmonics in the negative-sequence carrier signal current method and the removal method of the saturation induced harmonics with a high-pass filter. The feature of the proposed method is to be able to extract of a slot harmonics and to remove the saturation induced harmonics with an easy circuit. The summary is shown in Table 1 about the feature of the proposal method..

Published in:

Power Conversion Conference - Nagoya, 2007. PCC '07

Date of Conference:

2-5 April 2007