Rotor position estimation method, rotor position estimation device and motor

A technology of rotor position and rotor flux linkage, applied in the direction of electronically commutated motor control, generator control, motor control, etc., can solve the problems of aggravated sensitivity and compensation parameters that cannot adapt to the frequency band, so as to reduce dependence and improve work efficiency. best, improve efficiency and accuracy

Active Publication Date: 2017-09-15
GUANGDONG MEIZHI COMPRESSOR
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Problems solved by technology

The first method exacerbates the sensitivity of the system to motor parameters and system noise, while for the second m

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  • Rotor position estimation method, rotor position estimation device and motor
  • Rotor position estimation method, rotor position estimation device and motor
  • Rotor position estimation method, rotor position estimation device and motor

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[0060] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0061] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0062] Refer below figure 1 with figure 2 A rotor position estimation method and a rotor position estimation device according to some embodiments of the present invention are described.

[0063] ...

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Abstract

The invention provides a rotor position estimation method, a rotor position estimation device and a motor. The rotor position estimation method comprises the following steps: acquiring a first phase current and a second phase current; acquiring a first phase voltage and a second phase voltage; acquiring a speed reference value; calculating a first back electromotive force and a second back electromotive force, and integrating the first back electromotive force and the second back electromotive force to get a first flux linkage and a second flux linkage; processing the first flux linkage and the second flux linkage through a high-pass filter to get a third flux linkage and a fourth flux linkage; calculating a first component of rotor flux linkage and a second component of rotor flux linkage through the third flux linkage and the fourth flux linkage; calculating the rotor position angle according to the first component of rotor flux linkage and the second component of rotor flux linkage; and calculating the rotor speed according to the first component of rotor flux linkage and the second component of rotor flux linkage. The rotor position estimation method provided by the invention improves problems such as phase angle deviation, sensitivity to parameters, and poor work in a weak magnetic area, and is of higher efficiency and accuracy.

Description

technical field [0001] The present invention relates to the technical field of motors, in particular to a rotor position estimation method, a rotor position estimation device and a motor. Background technique [0002] In recent years, many scholars have proposed various speed sensorless control methods, which are usually divided into two categories, one is based on the fundamental frequency mathematical model of the motor, because it depends on the motor parameters, it is more suitable for medium and high speed occasions; the other is based on The saliency effect of the motor is extracted by harmonic injection and other methods, and it can run at low speed (zero speed). The open-loop flux linkage method using the fundamental frequency mathematical model, model reference adaptive, observer, Kalman filter, etc. do not need to use the saliency effect of the motor, making it more widely used. Among them, the open-loop flux linkage method has reliable control, fast convergence a...

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Application Information

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IPC IPC(8): H02P21/18
CPCH02P2203/03H02P2203/09H02P21/18
Inventor 叶斌英宋万杰任新杰
Owner GUANGDONG MEIZHI COMPRESSOR
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