Improved Kalman observer based control method free of speed sensor

A technology without speed sensor and control method, applied in the direction of control system, control generator, vector control system, etc., can solve the problem of increasing installation and maintenance costs, the system is susceptible to external environment interference, and the sensor accuracy is susceptible to vibration, dust and oil pollution. impact, etc.

Inactive Publication Date: 2016-10-26
SHANGHAI INST OF TECH
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Problems solved by technology

Among them, using angle and speed sensors to obtain this information is a direct way. However, in many applications, installing angle and speed sensors increases installation and maintenance costs. At the same time, due to the harsh on-site environment, the accuracy of the sensors is easily affected by vibration. , dust and oil, making the system susceptible to external environment interference, reducing the reliability of the system

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  • Improved Kalman observer based control method free of speed sensor
  • Improved Kalman observer based control method free of speed sensor
  • Improved Kalman observer based control method free of speed sensor

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Embodiment Construction

[0099]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.

[0100] see figure 1 , now consider the general situation in the patent of the present invention, there is a switching surface s(x)=s(x 1 ,x 2 ,···,x n )=0, it will x=f(x)(x∈R n ) The state space of this system is divided into upper and lower parts s>0 and sfigure 1 As shown, there are three cases of moving points on the switching surface. Point A is a common point, and when it reaches the vicinity of switching surface s=0, the moving point passes through point A; Point B is the ...

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Abstract

The invention discloses an improved Kalman observer based control method free of a speed sensor. A sliding-mode observer of a Kalman filter is used to estimate the rotating speed and the rotor position, and speed regulation of a motor is controlled according to the estimated rotor position and rotor speed. A speed-sensor-free control algorithm is used to replace a mechanical sensor, the rotor position and rotating speed information of the motor are obtained, errors in closed-loop feedback information is reduced, and the control method based on the sliding-mode controller is low the computational complexity and easy to realize in the engineering aspect. The method of the invention has the advantages of including low cost, simple control algorithm, and capable of estimating the rotating speed and rotor position rapidly and precisely.

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 an improved Kalman observer. Background technique [0002] Due to its compact structure and reliable performance, permanent magnet synchronous motors have been widely used in wind power generation, electric vehicles, ship drives and other fields. Since the control of the permanent magnet synchronous motor is usually completed in the rotor rotating coordinate system, in order to complete the control of the permanent magnet synchronous motor, it is necessary to obtain the angle and speed of the rotor. Among them, using angle and speed sensors to obtain this information is a direct way. However, in many applications, installing angle and speed sensors increases installation and maintenance costs. At the same time, due to the harsh on-site environment, the accuracy of the sensors is easily affected by vibration. ,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/13H02P21/18
CPCH02P21/0007H02P21/13
Inventor 张海刚张磊叶银忠徐兵王步来万衡华容卢建宁
Owner SHANGHAI INST OF TECH
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