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Switched reluctance motor low-speed variable load control method and device and switched reluctance motor

A technology of switched reluctance motor and control method, applied in the direction of AC motor control, control system, general control strategy, etc., can solve the problems of light-load start-up overshoot, slow start, variable load response stuck, etc., to increase the response speed Effect

Active Publication Date: 2021-08-27
SHENZHEN TOPBAND
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004]When the switched reluctance motor is started and operated at low speed and variable load, it is difficult for traditional PI control to adjust the appropriate proportional coefficient KP and integral coefficient KI in real time according to system changes, resulting in light Overshooting at start-up under load, too slow start-up under heavy load, and untimely response to load changes during operation, resulting in stuck problems

Method used

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  • Switched reluctance motor low-speed variable load control method and device and switched reluctance motor
  • Switched reluctance motor low-speed variable load control method and device and switched reluctance motor

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Embodiment Construction

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] In a preferred embodiment, refer to figure 1 , the switching reluctance motor low-speed variable load control method of the present embodiment includes the following steps:

[0040]S1. Obtain the feedback speed of the switched reluctance motor in real time, obtain the error magnitude Err from the difference between the feedback speed and the reference speed, and obtain the error change magnitude from the difference between the current error magnitude Err and the stored last error magnitude Err The value DErr. Specifically, after the switched reluctance motor starts to run, the rotational speed sensor is used to acquire the current actual rotational speed of the switched reluctance motor in real time, and the cur...

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Abstract

The invention relates to a switched reluctance motor low-speed variable load control method and device and a switched reluctance motor. The method comprises the following steps: S1, obtaining a feedback rotating speed of the switched reluctance motor in real time, obtaining an error amplitude Err according to a difference value between the feedback rotating speed and a reference rotating speed, and obtaining an error change amplitude DErr according to a difference value between a current error amplitude Err and a stored previous error amplitude Err; and S2, adjusting a proportionality coefficient KP and an integral coefficient KI of the switched reluctance motor according to the error amplitude Err and the error change amplitude DErr. Parameters of PI control are automatically adjusted along with different running states of the motor, overshoot values during starting, load changing and speed increasing and decreasing can be effectively reduced, and the response speed of the system is increased.

Description

technical field [0001] The invention relates to the field of switched reluctance motors, more specifically, to a method and device for controlling low-speed variable load of a switched reluctance motor and a switched reluctance motor. Background technique [0002] The switched reluctance motor is the latest generation speed control system following the frequency conversion speed control system and the brushless DC motor speed control system. It has a simple and firm structure, a wide speed range and high system reliability. The complete system mainly consists of motor entity, power converter, controller and position detector. The controller contains the power converter and control circuit, while the rotor position detector is installed at one end of the motor. [0003] PI control is a kind of linear control, which forms a control deviation according to the given value and the actual output value, and uses the proportion and integral of the deviation to form a control quanti...

Claims

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Application Information

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IPC IPC(8): H02P25/08H02P23/00
CPCH02P25/08H02P23/0004
Inventor 孙琍何舟付彦超
Owner SHENZHEN TOPBAND
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