Stepper Motor Stall Detection Method
A technology of stepping motor and detection method, applied in the direction of motor generator testing, measuring electricity, measuring device, etc., can solve the problems of abnormal operation of the motor system and abnormal operation of the motor system, so as to improve the anti-electromagnetic interference ability and improve the blocking effect. The effect of turning precision
Active Publication Date: 2020-11-20
HANGZHOU SANHUA RES INST CO LTD
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Problems solved by technology
When the stepper motor is blocked, if the controller cannot detect the stalled information correctly and take corresponding measures, the motor system will work abnormally; or if the controller misreports the stalled information of the stepping motor, It will cause the motor system to work abnormally
Method used
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Embodiment Construction
[0017] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
[0018] see figure 1 , the stepper motor 1 and the controller 2 work together, and the external power supply supplies power to the stepper motor 1 and the controller 2 . The controller 2 sends a control signal to the stepping motor 1, and the stepping motor 1 receives the control signal and performs corresponding actions. The motor 2 sends out different control signals, so that the controller 2 controls the stepping motor 1 . Generally, the collected operation signal is back electromotive force (hereinafter referred to as BEMF). In the process of collecting BEMF, it is usually interfered by external interference signals, and the external interference signals include electromagnetic interference signals. In this embodiment, the stepper motor 1 can be applied to a vehicle electronic expansion valve, and the controller 2 includes a central controller a...
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The invention relates to a stepping motor stalling detection method. According to the method, after a stepping motor operates normally, a controller collects the counter electromotive force of the stepping motor for a certain period of time; mathematical transformation is performed on the collected counter electromotive force, so that the mathematical transformation can transform the counter electromotive force to a frequency spectrum, and characteristic frequencies are obtained, wherein the characteristic frequencies comprise a main characteristic frequency, wherein the main characteristic frequency is corresponding to a characteristic amplitude value; and the characteristic amplitude value is compared with a first preset threshold value; if the characteristic amplitude value is greater than the first preset threshold value, the stepping motor stalls, and a stalling alarm is given out; the controller continues to collect the counter electromotive force of the stepping motor for the same period of time at one sampling interval; and the main characteristic frequency is the ratio of the rotation speed of the stepping motor to a first constant, so that the accuracy of the stalling detection of the stepping motor can be improved.
Description
【Technical field】 [0001] The invention relates to a control method of a stepping motor. 【Background technique】 [0002] The motor system includes a stepper motor and a controller. The stepper motor is controlled by the controller to rotate. When the stepper motor encounters obstacles during its rotation, the stepper motor will stall. When the stepper motor is blocked, if the controller cannot detect the stalled information correctly and take corresponding measures, the motor system will work abnormally; It will cause abnormal operation of the motor system. [0003] Therefore, it is necessary to improve the existing technology to solve the above technical problems. 【Content of invention】 [0004] The purpose of the present invention is to provide a stepping motor stall detection method, which can improve the detection accuracy of the stepping motor stall signal and has strong anti-electromagnetic interference capability. [0005] In order to achieve the above object, the...
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IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 不公告发明人
Owner HANGZHOU SANHUA RES INST CO LTD