On-line parameter identification simulation method for excitation inductance of linear traction motor

Abstract

The invention discloses an on-line parameter identification simulation method for excitation inductance of a linear traction motor. The on-line parameter identification simulation method comprises thesteps of building a state space equation taking a primary current and secondary magnetic flux as a state variable, a primary voltage as an input variable and a primary current as an output variable of the linear traction motor under static coordinate according to a mathematical model of the linear traction motor; obtaining an all-order state observer model of the linear traction motor after statereconfiguration and state variable error feedback correction; and building an on-line parameter identification model reference adaptive system of the linear motor to obtain an on-line identificationalgorithm of the excitation inductance by taking the state space model of the linear traction motor as a reference model and the all-order state observer model of the linear traction motor as an adjustable model. The on-line parameter identification simulation method can be applied to different working conditions of running of the linear traction motor, the influence of a dynamic side edge effecton the linear traction motor is fully considered, and the accurate modeling on the linear traction motor is achieved.

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, medium and low speed maglev trains driven by linear induction motors (LIM, linear induction motor) are 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 rotating 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,...

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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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