Method and device for determining position of rotor in brushless motor
A brushless motor, rotor position technology, applied in motor control, electronic commutator, electrical components, etc., can solve the detection accuracy deviation, brushless DC motor cannot be popularized, hinder the miniaturization and cost reduction of the motor, etc. question
Active Publication Date: 2022-03-18
拓尔微电子股份有限公司
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Problems solved by technology
[0004] Since the Hall element must be installed to detect the position of the rotor, it will hinder the miniaturization and cost reduction of the motor, and the installation condition of the Hall element will also cause deviations in detection accuracy, making it impossible for brushless DC motors universal
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[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0040] It should be understood that the "plurality" mentioned in this application means two or more. In the description of this application, unless otherwise specified, " / " means or means, for example, A / B can mean A or B; "and / or" in this article is just a description of the relationship between associated objects, It means that there can be three kinds of relationships, for example, A and / or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in order to clearly describe the technical solution of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can unde...
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The invention discloses a method and device for determining the position of a rotor in a brushless motor, and belongs to the field of motors. Comprising the steps that under the condition that any two phases of windings in the three-phase windings in the brushless motor are powered on, induction current signals generated on suspended windings except the two phases of windings in the three-phase windings are detected, and the induction current signals comprise effective current signals and interference signals flowing through the suspended windings. And processing the induction current signal by adopting a preset algorithm, wherein the preset algorithm is used for filtering the interference signal to obtain a target current signal. The waveform of the target current signal is amplified to obtain an amplified target current signal, and the amplified target current signal is used for determining the position of a rotor of the brushless motor. According to the brushless motor applying the method, the position of the rotor does not need to be detected by using a Hall element, the position of the rotor can be determined only by detecting the current of the suspended winding in the rotor, and the brushless motor can be developed towards miniaturization and low cost.
Description
technical field [0001] The present application relates to the field of motors, in particular to a method and device for determining the position of a rotor in a brushless motor. Background technique [0002] With the development of modern motor technology, traditional brushed motors can no longer better meet the requirements of industrial technology development due to problems such as large volume, serious heat generation, and short lifespan, and thus brushless DC motors were born. [0003] Brushless DC motors do not need brushes to detect the rotor position. The current way for brushless DC motors to detect the rotor position is to use Hall elements, such as Hall sensors. [0004] Since the Hall element must be installed to detect the position of the rotor, it will hinder the miniaturization and cost reduction of the motor, and the installation condition of the Hall element will also cause deviations in detection accuracy, making it impossible for brushless DC motors unive...
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IPC IPC(8): H02P6/16
CPCH02P6/16H02P2203/03Y02T10/64
Inventor 郭晋亮胡军
Owner 拓尔微电子股份有限公司