A switched reluctance motor current tracking control method, controller and speed regulating system

A switched reluctance motor and current tracking technology, which is applied in control systems, vector control systems, motor generator control, etc., can solve problems such as ignoring mutual inductance effects, achieve improved current tracking accuracy, strong reliability, and simple and easy control methods line effect

Active Publication Date: 2019-08-30
HUNAN UNIV
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Problems solved by technology

[0004] Therefore, it is necessary to design a new switched reluctance motor control method for the shortcomings of the above-mentioned traditional current hysteresis control and the existing control method ignoring the mutual inductance effect.

Method used

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  • A switched reluctance motor current tracking control method, controller and speed regulating system
  • A switched reluctance motor current tracking control method, controller and speed regulating system
  • A switched reluctance motor current tracking control method, controller and speed regulating system

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Embodiment 1

[0035] based on figure 1 and figure 2 In the simulink simulation model shown, the electrical equation of the kth phase winding is:

[0036]

[0037]s(j) is the energized state of the k-th phase winding in the j-th control cycle, and the value is 1, -1 or 0, which correspond to the three states of positive pressure, negative pressure and zero pressure respectively. For 8 / 6 switching magnetism For a resistance motor, k represents any of the four phases A, B, C, and D, while for a 6 / 4 switched reluctance motor, k represents any of the three phases A, B, and C. The current equation of the k-phase winding at time t is derived from formula (1):

[0038]

[0039] Among them, θ is the rotor position angle at time t, U dc is the bus voltage, L k (θ) is the average value of the inductance of the k-phase winding in the next control period T, R is the resistance value of the k-phase winding, and ω is the actual speed of the switched reluctance motor.

[0040] Such as image 3...

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Abstract

The invention discloses a switched reluctance motor current tracking control method, a switched reluctance motor current tracking controller and a switched reluctance motor speed adjusting system. The switched reluctance motor current tracking control method comprises the steps that: a voltage duty ratio of each control cycle is calculated according to positive and negative as well as magnitude of current deviation signals, and the updating of a control quantity is realized; and a voltage control quantity output at a phase changing stage further takes mutual inductance influence of adjacent opposing conduction phases into account. The switched reluctance motor current tracking control method, the switched reluctance motor current tracking controller and the switched reluctance motor speed adjusting system improve the current tracking precision at low-control frequency, achieve the effect of high switching frequency, enhance the current dynamic tracking capacity, and effectively decrease torque ripples during a phase-changing period and a non-phase-changing period; and a switching device does not need to be exposed to high current under the situation that the power device switching frequency is limited, and the control method is simple and feasible, high in reliability and suitable for popularization.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a current tracking control method, controller and speed regulating system of a switched reluctance motor. Background technique [0002] Switched reluctance motor (SRM) is considered to be a promising member of the variable speed drive field due to its simple structure, reliable operation, high starting torque and high mechanical efficiency. However, due to the double salient pole structure of the stator and rotor, the phase inductance value changes significantly with the rotor position, which makes the switched reluctance motor have the characteristics of no accurate mathematical model and severe nonlinearity, and it is difficult to achieve accurate control of its phase current. The suppression of torque ripple depends largely on the control accuracy of the phase winding current, so it is urgent to design a current controller with high tracking performance. [0003] When the control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P25/098
Inventor 李孟秋蔡辉史林然王辉罗德荣刘平
Owner HUNAN UNIV
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