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Speed sensorless control system based on sliding-mode observer of Kalman filter

A Kalman filter, speed sensorless technology, applied in the field of speed sensorless control systems, can solve problems such as increased installation and maintenance costs, the system is susceptible to external environment interference, and the sensor accuracy is susceptible to vibration, dust and oil pollution.

Inactive Publication Date: 2016-10-12
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Abstract
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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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  • Speed sensorless control system based on sliding-mode observer of Kalman filter
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  • Speed sensorless control system based on sliding-mode observer of Kalman filter

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Embodiment Construction

[0126] 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.

[0127] 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 near the switching surface s=0, the moving point passes through point A; Point B is the starti...

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Abstract

The invention discloses a speed sensorless control system based on a sliding-mode observer of a Kalman filter. The system comprises an inverter module, a PMSM module, a first Clark transformation module, a Park transformation module, a second Clark transformation module, a Kalman observer module, a first comparator module, a first PI adjusting module, a second comparator module, a second PI adjusting module, a third comparator module, a third PI adjusting module, a Park inverse transformation module and an SVPWM module; the revolving speed and the rotor position are estimated by adopting the sliding-mode observer of the Kalman filter, and speed regulation of the motor is controlled by estimating the rotor position and the rotor speed. According to the speed sensorless control system, the rotor position and the revolving speed information of the motor are acquired by replacing a mechanical sensor with a speed sensorless control algorithm, therefore, errors in closed loop feedback information are reduced, the calculation amount of a sliding-mode observer control method is decreased, and the system is easily achieved on engineering.

Description

technical field [0001] The invention relates to the technical field of speed sensorless speed measurement, in particular to a speed sensorless control system based on a sliding mode observer using a Kalman filter. 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 affecte...

Claims

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Application Information

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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 INSTITUTE OF TECHNOLOGY
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