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Device and method for position-sensorless control of switched reluctance motor

A technology of switched reluctance motor and control device, which is applied in the direction of AC motor control, model/simulation of control purpose, control system, etc. It can solve the problem of difficulty in accurately estimating the rotor position, and achieve the effect of small scale and high accuracy

Inactive Publication Date: 2018-02-23
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

[0003] Since the SRM is a double-convex machine structure, it uses unilateral excitation on the stator side, and the motor usually operates in a deep magnetic saturation state to increase the output power density, resulting in a highly nonlinear electromagnetic characteristic. The accurate mathematical model is used to achieve accurate rotor position. estimated to be very difficult

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  • Device and method for position-sensorless control of switched reluctance motor
  • Device and method for position-sensorless control of switched reluctance motor
  • Device and method for position-sensorless control of switched reluctance motor

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing:

[0033] figure 1 It is a structural block diagram of a position sensorless control system for a switched reluctance motor, which includes a controller, a drive circuit, a protection circuit, a rectifier circuit, a three-phase asymmetrical bridge circuit, a switched reluctance motor, a load, a voltage sensor, and a current sensor; Among them, the controller also includes a voltage / current sampling module, a flux calculation module, a neural network model of the switched reluctance motor, a speed regulator, a current regulator and commutation logic.

[0034] BPNN is a multi-layer feed-forward neural network with error backpropagation, and it is one of the most widely used neural networks at present. It consists of an input layer, one or more hidden layers, and an output layer. Each neuron is represented by a node, there is no connection between nodes in the same layer, and t...

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Abstract

The invention relates to a device and a method for position-sensorless control of a switched reluctance motor. The device and the method have the beneficial effects of estimating an initial rotor position according to an accurate formula, adopting a feedforward neural network for modeling rotor position characteristics of the switched reluctance motor, further optimizing the model by adopting an i / Psi preprocessing method on the basis, establishing a small-scale and highly-accurate switched reluctance motor neural network model, and satisfying requirements of a driving system for rotor position estimation.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to the positionless control of switched reluctance motors. Background technique [0002] Switched reluctance motor (Switched Reluctance Motor, SRM) has the advantages of simple structure, reliable operation, high efficiency, low cost, stable operation in a wide speed range and no need for rare materials. , mining, textiles, household appliances and other fields have been applied. The switched reluctance motor drive system (SRD) composed of SRM is a position closed-loop system, which requires the position signal provided by the rotor position sensor to excite or turn off the phase winding, and calculates the speed from the position signal to form a speed closed loop to realize self-synchronous operation . The introduction of traditional photoelectric, electromagnetic and magnetic-sensitive position sensors not only weakens the advantages of SRM's simple structure, increases t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/34H02P6/18H02P25/089
CPCH02P6/18H02P6/34H02P25/089
Inventor 蔡燕徐海南王宇姜文涛孙思远王晨辉
Owner TIANJIN POLYTECHNIC UNIV
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