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Control method for improving compensation control accuracy of motor dead zone

A technology of dead zone compensation and control accuracy, which is applied in the direction of motor generator control, electronic commutation motor control, control of electromechanical brake, etc.

Inactive Publication Date: 2016-01-20
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a control method for improving the control precision of motor dead zone compensation, which is used to solve the problem of arctangent angle acquisition while improving the accuracy of angle acquisition, thereby improving the precision of dead zone compensation

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  • Control method for improving compensation control accuracy of motor dead zone
  • Control method for improving compensation control accuracy of motor dead zone
  • Control method for improving compensation control accuracy of motor dead zone

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Embodiment Construction

[0029] The invention aims to propose a control method for improving the control precision of motor dead zone compensation, which is used to solve the problem of arctangent angle acquisition, improve the angle acquisition precision, and further improve the dead zone compensation precision.

[0030] Since the motor angle control is generally 0-360°, through analysis, it can be subdivided into 0-45°, and then the angle of 0-360° is obtained through the algorithm, and the vector When the angle θ between the x coordinate axis and the x coordinate axis, due to Such as figure 1 As shown, and tan(45°)=1, the following method can be used for control acquisition:

[0031] Subdivide the tangent function value from 0 to 45 degrees into 2 n parts, the tangent value of each part is separated by Divide 1 into 2 n , each for the interval build data from 0, Calculate the established arctangent value and find its corresponding angle (in degrees or radians). Since the corresponding ...

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Abstract

The invention relates to the air-conditioning control technique, and discloses a control method for improving the compensation control accuracy of a motor dead zone, which solves the acquisition problem of an arc tangent angle while improving the acquiring accuracy of the arc tangent angle so as to improve the compensation accuracy of the dead zone. The method comprises the steps of establishing a high-accuracy arc tangent data look-up table for a single-chip microcomputer to acquire the compensation data of the dead zone and compensate the dead zone, wherein the high-accuracy arc tangent data look-up table is subdivided into 2n parts based on 0-45 degree tangent function values and tangent values in each part are set apart; determining an angle value corresponding to each tangent function value and amplifying the angle value; rounding the amplified angle value and storing the rounded value in the ROM of the single-chip microcomputer for the single-chip microcomputer to inquire and use. According to the invention, generally, n is larger than or equal to 8, and m is larger than or equal to 16. The above method is used for controlling the permanent-magnet brushless direct current motor of an air conditioner.

Description

technical field [0001] The invention relates to the air conditioner control technology, in particular to a control method for improving the control accuracy of motor dead zone compensation. Background technique [0002] Permanent magnet brushless DC motor control generally adopts vector control. When calculating the direction of the vector, it is necessary to calculate the angle between the current vector and the stationary coordinate axis α (or the fixed coordinate axis u axis), that is, the arctangent calculation is required to obtain it. The dead zone compensation control method introduced in the patent "A Dead Zone Compensation Control Method and System (201310534766.3)" also needs to be obtained by I d * , I q * The angle between the determined vector and the U coordinate axis is used to determine the sign and size of the vector compensation, but no specific arctangent acquisition control method is given, and the arctangent-based dead zone compensation control method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 陈跃涂小平刘启武高向军王声纲
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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