A Hall signal acquisition device and its working method
A hall signal and acquisition device technology, applied in the direction of electronic commutator, torque ripple control, etc., can solve the problems of speed fluctuation, rotor position information lag, etc., and achieve the effect of alleviating information lag and improving low-speed performance
Active Publication Date: 2021-05-04
上海深启半导体科技有限公司
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[0004] The invention provides a Hall signal acquisition device and its working method, which are used to solve the problem of the speed fluctuation caused by the lag of the rotor position information of the permanent magnet synchronous motor at low speed
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[0025] In order to make the object, hardware design scheme and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] A Hall signal acquisition device provided by the present invention includes: a DC power supply unit, an interface unit, a Hall signal acquisition unit, a trigger voltage adjustment unit and a single-chip microcomputer.
[0027] The interface unit is connected to the Hall signal acquisition unit for accessing the Hall signal of the permanent magnet synchronous motor; the Hall signal acquisition unit is connected to the trigger voltage adjustment unit for level conversion of the Hall signal of the permanent magnet synchronous motor and filter processing; the trigger voltage adjustment unit...
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The invention provides a Hall signal acquisition device, which is characterized by comprising: an interface unit, a Hall signal acquisition unit, a trigger voltage adjustment unit, and a DC power supply unit; the interface unit is connected with the Hall signal acquisition unit and is used for connecting The hall signal of the permanent magnet synchronous motor; the hall signal acquisition unit is connected with the trigger voltage adjustment unit, which is used for level conversion and filtering processing of the hall signal of the permanent magnet synchronous motor; the trigger voltage adjustment unit is used for according to the trigger voltage The size further converts the output signal of the Hall signal acquisition unit, and outputs the processing result; the DC power supply unit is connected with the Hall signal acquisition unit and the trigger voltage adjustment unit to supply the connected unit. When the permanent magnet synchronous motor is at low speed, the present invention can effectively alleviate the problem of rotor position information lag by changing the trigger voltage of the edge signal of the Hall sensor, and improve the low speed performance of the permanent magnet synchronous motor.
Description
technical field [0001] The invention relates to a Hall detection technology of a brushless DC motor, in particular to a Hall signal acquisition device for improving the low-speed performance of a permanent magnet synchronous motor and a working method thereof. Background technique [0002] The permanent magnet synchronous motor has the advantages of simple structure, small size, light weight, low loss, high efficiency, high power factor, etc. It is mainly used for the update of high-performance servo drive systems and DC motors that require fast response, wide speed range, and accurate positioning. Replacement motor. [0003] Hall sensors are commonly used as position sensors for permanent magnet synchronous motors. The Hall sensor is a low-precision position sensor, especially when the permanent magnet synchronous motor is at low speed, the edge signal of the Hall sensor is close to the trapezoidal wave, which will directly cause the rotor position information obtained by ...
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IPC IPC(8): H02P6/17H02P6/10
CPCH02P6/10H02P6/17
Inventor 董鑫魏海峰王浩陈张懿李垣江刘维亭
Owner 上海深启半导体科技有限公司