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Walsh function‐based position sensorless control for interior permanent magnet motor drives using ripple‐current of high‐frequency triangular‐wave‐carrier PWM inverter
Author(s) -
Choeisai Krit,
Kobayashi Naoto,
Kondo Seiji
Publication year - 2003
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.10205
Subject(s) - pulse width modulation , ripple , inverter , control theory (sociology) , rotor (electric) , harmonic , torque ripple , induction motor , detector , engineering , harmonics , electronic engineering , physics , computer science , electrical engineering , acoustics , voltage , direct torque control , control (management) , artificial intelligence
This paper proposes the Walsh function‐based position sensorless drive method of a PM motor by using high‐frequency 20‐kHz triangular‐wave‐carrier PWM inverter ripple current. The proposed method uses the Walsh harmonic of PWM inverter ripple current to estimate the motor rotor position. By using the high‐frequency switching ripple current, the period of the rotor position estimation has been decreased and improves the step response of PM motor. The Walsh function makes it possible to use a definite integrator as the Walsh harmonic detector that can separate the small ripple‐current signal from the motor drive‐current signal. The Walsh harmonic detector circuit consists of less parts than the Fourier harmonic detector circuit. The validity of the proposed method was clarified by several experimental results. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 145(3): 80–88, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10205