Industrial Technology Research Institute

Ya-Ling Chang

Chia-Min Ting

Chun-Chieh Chang

Yu-Hsun Wu

Hsin-Hung Chou

Chun-An Lin

Kuo-Lin Chiu

Wen-Che Shen

Cheng-Min Chang

Chiu-Pao Tien

An electric motor with double stators includes a first stator, a first stator and a rotor assembly. The rotor assembly is located between the first stator and the second stator in a radial direction. The rotor assembly includes a rotor body, a plurality of first rotor slots, a plurality of second rotor slots, a plurality of first magnets, and a plurality of second magnets. A first air gap is formed between the rotor body and the first stator, and a second air gap is formed between the rotor body and the second stator. The material of the first magnets is different to the material of the second magnets, and any position of the first magnets is different to any position of the second magnets.

Electric motor with double stators

A motor parameter estimation method includes obtaining an operation signal of a motor, wherein the operation signal includes an encoder signal, a phase current and a driving voltage, obtaining a number of poles according to the encoder signal and the phase current, performing a simulation procedure according to the driving voltage, the number of poles and an initial random parameter set, wherein the simulation procedure is calculating a simulation response current, calculating an error value between the simulation response current and the phase current, determining whether the error value falls into a threshold range, if the error value falls outside of the threshold range, performing the simulation procedure according to the driving voltage, the number of poles and an update random parameter set, and if the error value falls into of the threshold range, outputting the number of poles and the initial random parameter set.

Motor parameter estimation device and method

A low speed control method and an apparatus for a servo motor. The control apparatus comprises: an encoder capable of acquiring a speed signal from a servo motor and encoding the speed signal to output a low-resolution encoded signal; an insertion calculation unit capable of receiving the low-resolution encoded signal from the encoder to be processed by an interpolation operation for converting the low-resolution encoded signal into a high-resolution encoded signal to be outputted therefrom; a servo control chip capable of setting internal parameters and receiving the high-resolution encoded signal from the insertion calculation unit to be processed by a calculation process so as to output a switch control instruction; and a power module capable of receiving the switch control instruction from the servo control chip and then transmitting the same to the servo motor for adjusting the operation speed of the servo motor.

Low speed control method and apparatus for servo motor

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Hsinchu County, Taiwan

Ya-Ling Chang