A Speed ​​Sensorless Control Method Based on Rotating High Frequency Injection Method

A speed sensorless, high-frequency injection technology, which can be used in control systems, control generators, vector control systems, etc., and can solve problems such as complex principles and large amount of calculation.

Active Publication Date: 2019-01-08
杭州鋆磊产教科技有限公司
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Problems solved by technology

[0005] In order to overcome the existing problems of the rotor angle and rotational speed estimation method of the permanent magnet synchronous motor based on the speed sensor, the principle is complicated, the calculation amount is large, and the integral saturation is solved. A speed sensorless control method based on the rotating high-frequency injection method, which adjusts the proportional integral coefficient of the PI regulator through the fuzzy controller, so that the PI regulator can have good dynamic and steady-state performance in a wide speed range of the motor

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  • A Speed ​​Sensorless Control Method Based on Rotating High Frequency Injection Method
  • A Speed ​​Sensorless Control Method Based on Rotating High Frequency Injection Method
  • A Speed ​​Sensorless Control Method Based on Rotating High Frequency Injection Method

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Embodiment Construction

[0102]The technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all examples. Based on the present invention All other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0103] Such as figure 1 As shown, the present invention discloses a speed sensorless control method based on the rotating high-frequency injection method, which includes the following steps:

[0104] Step 1: AC permanent magnet synchronous motor detects and outputs three-phase current i a i b and i c ;

[0105] Step 2: Three-phase current i a i b and i c After Clark transformation, output the two-phase stator current i in the two-phase static Cartesian coordinate system α-β ...

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Abstract

The invention discloses a speed-less sensor control method based on a rotation high-frequency injection method and fuzzy PI (proportional integral) control. In the estimation of a rotor angle and a rotating speed, a high-frequency signal injection method is particularly suitable for a zero speed and a low speed, and meanwhile, a fuzzy controller is adopted to replace a traditional PI speed regulator. In a vector control system of a permanent magnet synchronous motor, because of the factors of obvious time delay, low self-adaptive ability and the like of the traditional PI regulator, and strong robustness of fuzzy control, the influence of interference and parameter variation on the control effect is greatly weakened, and the method is particularly suitable for control of nonlinear, time-variation and pure delay systems; and the fuzzy control is designed based on suggestive knowledge and language decision-making rules, so that the method is favorable for simulating a process and a method for manual control, and enhancing the adaptability of a control system. The control method has a certain intelligent level, and is very suitable for those objects of which mathematical models are difficult to obtain, dynamic characteristics are not easy to grasp, and change is very significant.

Description

technical field [0001] The invention relates to the technical field of speed sensorless speed measurement, in particular to a speed sensorless control method based on a rotating high-frequency injection method. Background technique [0002] Permanent Magnet Synchronous Motor (PMSM) has the advantages of high power density, high energy conversion efficiency, wide speed range, small size, light weight, etc., and has been widely used in industrial, civil, military and other fields. [0003] The control of the permanent magnet synchronous motor needs to obtain the position and speed information of the motor rotor. At present, the commonly used position sensors include photoelectric encoders, resolvers and other devices. The use of these devices not only increases the size and cost of the system, but also reduces the system cost. It also limits the application of permanent magnet synchronous motors in special environments. In order to solve many defects caused by mechanical senso...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/13H02P21/00H02P21/26H02P27/12
CPCH02P21/001H02P21/13H02P27/12
Inventor 张海刚胡添添张磊王步来叶银忠华容钱平万衡徐兵卢建宁储雷杨俊童中祥
Owner 杭州鋆磊产教科技有限公司
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