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On-line identifying method and device for stator resistor

A stator resistance and identification method technology, which is applied to the control of electromechanical transmission devices, electronic commutation motor control, electrical components, etc., can solve the problem of high complexity of online identification methods

Active Publication Date: 2012-07-25
合肥阳光电动力科技有限公司
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Problems solved by technology

[0007] In view of this, the present invention provides a stator resistance online identification method and device to solve the problem of high complexity of the existing online identification method

Method used

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  • On-line identifying method and device for stator resistor
  • On-line identifying method and device for stator resistor

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specific Embodiment approach

[0111] In other embodiments of the present invention, the acquisition of the three-phase stator current I in the above-mentioned embodiment s_abc , three-phase stator voltage U s_abc Specific implementation methods include:

[0112] Obtain the output value I of the current sensor that matches the rated current of the motor s_abc ;

[0113] Obtain the output value U of the voltage sensor that matches the rated voltage of the motor s_abc .

[0114] The above current sensor and voltage sensor guarantee the I s_abc and U s_abc With high precision.

[0115] In addition, the stator voltage can also be obtained through voltage reconstruction.

[0116] In other embodiments of the present invention, the specific implementation manners of judging whether the motor is in a steady state in steps S100 and S300 of the above embodiment include:

[0117] Calculate the total change Δω of the rotor speed of the motor within the preset time interval ΔT r ;

[0118] Judgment Δω r Is it...

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Abstract

The embodiment of the invention discloses an on-line identifying method for a stator resistor. The method comprises the following steps of: judging if a motor is under a stable state, and if yes, obtaining a three-phase stator current Is_abc and a three-phase stator voltage Us_abc; orientating the Is_abc in d direction of a synchronous rotating dq coordinate system and calculating the component Is_d of the d direction, or orientating the Is_abc in q direction of the synchronous rotating dq coordinate system and calculating the component Is_q of the q direction; calculating locking phase angle theta-i and synchronous rotating speed Omega-s; calculating the component Us_d in the d direction and the component Us_q in the q direction of the Us_abc, according to the theta-i; obtaining a stator flux linkage Psi-s and calculating the component Psi-sq of the Psi-s in the q direction or the component Psi-sd in the d direction; and calculating a stator resistance value Rs according to a stator resistance calculation formula. According to the method provided by the invention, the problem of high complexity of the present identifying method is solved. The embodiment of the invention also discloses an on-line identifying device for the stator resistor.

Description

technical field [0001] The invention relates to the technical field of electric vehicle drive system control, in particular to a stator resistance online identification method and device. Background technique [0002] In the control process of the electric vehicle drive system, accurate flux linkage information needs to be mastered, so flux linkage estimation is required. In the estimation of stator flux linkage based on voltage model, only the stator resistance is the motor parameter involved, so the accurate online identification of stator resistance can improve the accuracy of flux linkage estimation. [0003] The existing stator resistance online identification methods mainly include the identification method based on the steady-state model of the motor and the identification method based on the adaptive theory. [0004] Based on the identification method of the motor steady-state model, the reactive power, stator flux linkage, rotor flux linkage, and electromagnetic to...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P21/16
Inventor 曹仁贤张兴余鸿杨淑英余勇谢震方向军柴盛丛
Owner 合肥阳光电动力科技有限公司
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