Control system for speed of rotor of hybrid stepping motor and control method therefor

A stepping motor and rotor speed technology, which is applied in the control system, vector control system, motor generator control, etc., can solve the problems of high cost, complicated acquisition method, and small rotor oscillation suppression effect, and achieve good current sine degree, Reduced running noise and stabilized rotor rotation

Active Publication Date: 2011-11-16
CHINA LEADSHINE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Disadvantage 1: Although the winding current closed-loop control structure has a good effect on the low-speed operation area of ​​the stepping motor, it has little inhibitory effect on the rotor oscillation in the high-speed area
Moreover, when the motor runs in the high-speed area, the stator winding current contains many harmonic components, and these harmonics directly affect the stable operation of the motor, so the current closed-loop control in the high-speed area cannot achieve good results
[0010] Shortcoming two: the control variable (such as the instantaneous power in US4455520, the current error signal in US4675590, the average value of the current sum in US4683409, the analog torque signal in US5847535) that prior art adopts when suppressing rotor rotation oscillation The acquisition method is either more complicated, higher cost, or not suitable for high-speed areas, so further improvement is required

Method used

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  • Control system for speed of rotor of hybrid stepping motor and control method therefor
  • Control system for speed of rotor of hybrid stepping motor and control method therefor
  • Control system for speed of rotor of hybrid stepping motor and control method therefor

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Effect test

Embodiment 1

[0094] According to the above analysis of the rotor oscillation suppression strategy, the block diagram of the new hybrid stepper motor open-loop drive system proposed in this example is as follows Figure 7A shown.

[0095] Figure 7A The middle rectifier bridge 1 rectifies the front-end AC voltage 31 into a DC voltage 13 . If there is a DC power supply outside the driver, the rectifier bridge 1 can be omitted. A-phase inverter 3 and B-phase inverter 2 have exactly the same structure, both are single-phase full-bridge topology, supply power to A-phase winding 29 and B-phase winding 28 respectively, and generate required voltage under the control of PWM signals 27 and 26 Stator winding voltage. According to the direction of rotation 14, the subdivision of microsteps 30, and the frequency of the external pulse 15, the given rotor speed 16 can be calculated as follows:

[0096] n r * = 60 · ...

Embodiment 2

[0109] The above-mentioned rotor oscillation suppression function can also be applied to the multi-phase hybrid stepping motor system. In specific applications, it is necessary to statically transform the multi-phase stator winding variable to figure 1 αβ two-phase stationary coordinate system. Then construct the control algorithm in the αβ coordinate system, the control algorithm in the αβ coordinate system is exactly the same as the control algorithm of the previous two-phase hybrid stepping motor. It can be seen that the scheme of the present invention adopts the coordinate system static transformation method, and the rotor oscillation suppression function can be easily transplanted into the multi-phase hybrid stepping motor open-loop drive system.

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Abstract

The invention relates to a control system for speed of a rotor of a hybrid stepping motor and a control method therefor used for inhibiting the rotating oscillating of the rotor in a speed / position open-loop driving system of the hybrid stepping motor. The device and the method adopt a stator flux closed-loop structure. In the preferred embodiment, a bandpass filter is also utilized for extracting the flutter component in an electromagnetic torque, and the rotor position angle flutter component is obtained through integration thereof. The stator flux phase is modulated in real time by the rotor position angle flutter component so as to inhibit the rotor oscillating. The invention has the advantages that the cost is low, no position angle accumulated error occurs in the rotating of the rotor, the range of the operating speed of the motor is wide, and the load capability of the motor in medium and high speed is strong.

Description

technical field [0001] The invention relates to a hybrid stepping motor, in particular to a hybrid stepping motor rotor speed control system and control method. Background technique [0002] Among many stepping motors, the hybrid stepping motor not only has the characteristics of small step distance and high operating frequency of the reluctance stepping motor, but also has the advantages of small power consumption of the permanent magnet stepping motor, and has the advantages of large output torque. and other advantages, and thus widely used. [0003] However, due to the characteristics of the design structure of the hybrid stepping motor, the damping coefficient of this kind of motor is very small when the simple open-loop control is adopted, and the rotor rotates and oscillates severely. In particular, the intermediate frequency oscillation limits the speed range and dynamic response speed of the motor. As a result, the application of a simple open-loop control hybrid s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/05
Inventor 周扬忠李卫平熊世辉赖九才
Owner CHINA LEADSHINE TECH CO LTD
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