DC motor rotating speed detection method and device thereof
A DC motor and rotational speed detection technology, which is applied to devices using electric/magnetic methods, can solve the problems of unstable measurement results, inaccurate measurement, and DC motors being susceptible to external interference, so as to avoid being susceptible to external interference, Guarantee the effect of accuracy and stability
Active Publication Date: 2020-04-10
东莞市深鹏电子有限公司
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[0004] The purpose of the present invention is to provide a method and device for detecting the rotational speed of a DC motor, aiming to solve the technical problems in the prior art that the Hall sensor is easily affected by external interference when measuring the DC motor, resulting in inaccurate measurement and unstable measurement results
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[0045] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the embodiments of the present invention, but should not be understood as limiting the present invention.
[0046] In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are proposed for a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circ...
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The invention belongs to the technical field of direct-current motors, and particularly relates to a direct-current motor rotating speed detection method and a device thereof. The direct-current motorrotating speed detection method comprises the following steps: obtaining a bus current of a direct-current motor, and converting the bus current into a first voltage signal; amplifying the first voltage signal to obtain a first amplified signal; performing filtering conversion processing on the first amplified signal to obtain a square-wave signal; and calculating the rotating speed value of thedirect-current motor according to the square-wave signal. The method comprises the steps of firstly obtaining bus current of the direct-current motor, converting the bus current into the first voltagesignal, amplifying the first voltage signal to obtain the first amplified signal, performing filtering conversion processing on the first amplified signal to obtain a the square-wave signal and finally calculating the rotating speed value of the direct-current motor according to the square-wave signal, thereby avoiding the problem that a Hall sensor is susceptible to external interference when measuring the rotating speed and ensuring the accuracy and stability of rotating speed measurement.
Description
Technical field [0001] The invention belongs to the technical field of DC motors, and in particular relates to a method and device for detecting the rotation speed of a DC motor. Background technique [0002] DC motors include brushless DC motors and brushed DC motors. Among them, brushless DC motors are increasingly used in various industries due to their high efficiency, low noise, long life, and simple assembly structure. [0003] The speed of the DC motor needs to be detected during use. Traditional speed measurement methods mostly use Hall sensors, which use Hall sensors to sense the rotor magnetic field and convert it to the motor speed. However, this method needs to add a Hall sensor to the motor, and also needs to reserve a Hall installation position on the mechanical structure, which increases the difficulty of assembly and increases the installation cost. In addition, due to the need to sense the rotor magnetic field, the accuracy of the Hall sensor's speed measurement...
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IPC IPC(8): G01P3/46
CPCG01P3/46
Inventor 黄志飞孙家广
Owner 东莞市深鹏电子有限公司