Method of Reducing Torque Fluctuation of Spliced ​​Servo Motor by Reluctance Compensation

A servo motor, reluctance torque technology, used in the control of generators, motor generator control, control of electromechanical brakes, etc.

Active Publication Date: 2016-08-31
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Abstract
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Problems solved by technology

[0006] Aiming at the problem of large torque fluctuations in spliced ​​servo motors, the present invention provides a method for reducing torque fluctuations of spliced ​​servo motors through magnetic resistance compensation

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  • Method of Reducing Torque Fluctuation of Spliced ​​Servo Motor by Reluctance Compensation
  • Method of Reducing Torque Fluctuation of Spliced ​​Servo Motor by Reluctance Compensation
  • Method of Reducing Torque Fluctuation of Spliced ​​Servo Motor by Reluctance Compensation

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] The actual output torque of the motor mainly includes two parts, electromagnetic torque and disturbance torque. The disturbance torque here specifically refers to the reluctance torque of the motor itself. Assuming that the motor winding does not contain high-order harmonics and the air-gap flux density of the motor is a sine wave, the electromagnetic torque output by the motor is a constant value. The reluctance torque of the motor is a function of periodic fluctuations related to its own structural form. When using vector control, there is a linear relationship between the electromagnetic torque of the motor and the quadrature axis current. Since the reluctance torque is a periodic function of the rotational po...

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Abstract

Aiming at the problem of large torque fluctuations in the spliced ​​servo motor, the present invention provides a method for reducing the torque fluctuation of the spliced ​​servo motor through magnetic resistance compensation: 1. Measure the torque fluctuation of the spliced ​​servo motor during one rotation The magnetic resistance torque T c . 2. Construct the expression of magnetic resistance torque and rotational position . 3 Obtain the direct axis current value I of the motor d and quadrature axis current value I q . 4. will and motor torque coefficient to obtain the compensation current that varies with the position . 5. By I d and I q Obtain the theoretical reference current I of the motor * qv . The theoretical reference current I * qv Compensation current I with position variation qr Subtract to obtain the actual quadrature axis reference current I * q And input PWM to drive the motor. Beneficial technical effect: after adopting the method, the torque fluctuation of the spliced ​​servo motor is reduced by an average of 40% compared with the fluctuation before use.

Description

technical field [0001] The invention belongs to the field of electromechanical control, and in particular relates to a multi-stator spliced ​​servo motor control method for a large turntable, specifically a method for reducing torque fluctuations of the spliced ​​servo motor through magnetic resistance compensation. Background technique [0002] With the development of science and technology, the size of machine tools, radars, telescopes and other equipment is getting larger and larger, and the size of the required turntable is also getting larger. For example, the size of the latest foreign astronomical telescopes has reached 30 to 50 meters (m). The previous transmission system can no longer meet the requirements of the moment of inertia and mechanical stiffness required by these devices - if the traditional transmission design scheme is adopted, the diameter of the torque motor that needs to be directly driven will reach more than 10m. This will bring great trouble to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/05
Inventor 常九健倪田荣梅亮
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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