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Flux weakening control method and device for permanent magnet direct-current motor

A technology of field-weakening control and permanent-magnet direct current, which is applied in motor generator control, electromechanical transmission control, electronic commutation motor control, etc., can solve problems such as jitter, algorithmic complex torque, etc., and achieve less calculation links and faster debugging process Simple, high-frequency noise reduction effect

Active Publication Date: 2017-01-25
深圳市双驰科技有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a field-weakening control method and device for a permanent magnet DC motor, which has a simple algorithm and does not easily cause torque jitter in view of the above-mentioned complex algorithm in the prior art and the defect of torque jitter

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  • Flux weakening control method and device for permanent magnet direct-current motor
  • Flux weakening control method and device for permanent magnet direct-current motor
  • Flux weakening control method and device for permanent magnet direct-current motor

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Embodiment Construction

[0031] The present invention obtains the error of the voltage model by limiting the voltage model of the dq axis, and the error of the voltage model is multiplied by the current rotor electrical angular velocity and a suitable constant after the integration process, and the obtained product is used as the output of the compensation angle, and finally Then add it to the MTPA angle as the output of the phase angle after field weakening. The realization principle of the technical solution of the present invention is illustrated below:

[0032] 1. Neglecting the stator resistance voltage drop, the difference between the reference voltage output by the current loop controller and the actual voltage ud and uq output after overmodulation is expressed in the dq coordinate system as:

[0033] { Δ u d = - ω e L ...

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Abstract

The invention relates to a flux weakening control method and device for a permanent magnet direct-current motor. The flux weakening control method comprises steps as follows: calculating an error of a voltage mode according to a voltage value output by a current loop controller in a dq rotating coordinate system and a limit value of the voltage mode; calculating a compensation angle according to the error of the voltage mode and an electrical angular velocity of a rotor; obtaining an MTPA (maximum torque per ampere) angle according to a current reference vector; adding the compensation angle to the MTPA angle to generate a flux weakened phase angle; calculating a current reference value in the dq rotating coordinate system according to the flux weakened phase angle and the current reference vector and transmitting the current reference value in the dq rotating coordinate system into the current loop controller. With the implementation of the technical scheme, few algorithm links are needed, the debugging process is simple, and high-frequency noise is reduced.

Description

technical field [0001] The invention relates to the field of motors, in particular to a field weakening control method and device for a permanent magnet DC motor. Background technique [0002] With the continuous improvement and improvement of the performance of permanent magnet materials and the gradual maturity of the research and development experience of permanent magnet motors, permanent magnet synchronous motors are developing towards high power, high performance and miniaturization. Due to the use of permanent magnets to provide air-gap flux, permanent magnet synchronous motors have the advantages of simple structure, small size, light weight, low loss, and high efficiency, and have been widely used in performance servo control and other fields. [0003] For permanent magnet DC motor control, since the DC side voltage of the inverter reaches the maximum value, the current loop controller will be saturated. In order to obtain a wider range of speed regulation and achie...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/14
CPCH02P21/0003H02P21/14
Inventor 孙冬晨
Owner 深圳市双驰科技有限公司
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