An online parameter identification and simulation method for the excitation inductance of a linear traction motor

A technology of traction motor and excitation inductance, which is applied to the control of generators, motor generators, AC motors, etc., can solve the problems of motor parameter changes, and achieve the effects of good real-time performance, high precision, and strong versatility

Active Publication Date: 2019-12-20
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0004] The dynamic edge effect of the linear traction motor is particularly obvious when the linear traction motor operates at medium and high speeds. However, the existing linear traction motor model still uses the traditional rotary induction motor model, which is only suitable for dynamic edge effects at low speeds. In the case where the effect is not significant, it is not possible to study the situation where the motor parameters of the linear traction motor change significantly when the linear traction motor is running at medium and high speeds

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  • An online parameter identification and simulation method for the excitation inductance of a linear traction motor
  • An online parameter identification and simulation method for the excitation inductance of a linear traction motor
  • An online parameter identification and simulation method for the excitation inductance of a linear traction motor

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Embodiment Construction

[0052] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The online parameter identification method of the excitation inductance of a linear induction motor (LIM, linear induction motor) realizes the online parameter identification of the excitation inductance of the linear traction motor under different working conditions. Include the following steps:

[0053] Step 1: Establishment of linear traction motor vector control system

[0054] This embodiment improves on the basis of the traditional asynchronous motor vector control model, and obtains the vector control model of the linear traction motor; and processes and calculates the pulse and DC side voltage output by the modulation module to obtain the three-phase voltage, which is transformed into In the α-β coordinate system, the input quantity is provided for the establishment of the reference model and the establishment of the adjustable...

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Abstract

The invention discloses an online parameter identification and simulation method for the excitation inductance of a linear traction motor. According to the mathematical model of the linear traction motor, the linear traction motor is established under static coordinates with primary current and secondary flux linkage as state variables and primary voltage as input variables. The primary current is the state space equation of the output variable; the full-order state observer model of the linear traction motor is obtained after state reconstruction and state variable error feedback correction; the state space model of the linear traction motor is used as a reference model, and the full-order state observer model of the linear traction The first-order state observer model is used as an adjustable model, and a model reference adaptive system for online identification of linear motor parameters is established, and an online identification algorithm for excitation inductance is obtained. The invention can be applied to different operating conditions of the linear traction motor; fully considers the influence of the dynamic side-end effect on the linear traction motor, and realizes accurate modeling of the linear traction motor.

Description

technical field [0001] The invention relates to the technical field of electric traction AC drive, in particular to an online parameter identification and simulation method for the excitation inductance of a linear traction motor. Background technique [0002] As a new generation of urban rail transit system, the medium and low speed maglev train driven by linear traction motor (LIM, linear induction motor) is the best choice to meet the requirements of speed, reliability, stability and environmental impact. In addition, compared with traditional rail transit such as subways and light rails, medium and low-speed maglev trains have better performance, such as small turning radius, strong climbing ability, low operating noise, and low maintenance costs. Compared with the traditional rotary motor, the linear traction motor has a special structure without slots and primary disconnection, which causes the air gap magnetic field to be distorted during the operation of the motor, w...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/16H02P21/13H02P25/06
Inventor 葛兴来王惠民
Owner SOUTHWEST JIAOTONG UNIV
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