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A signal processing method and device

A method of processing, signal technology

Inactive Publication Date: 2018-09-11
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are following defects in the prior art, because when calculating the stable pulse width time, it is necessary to sum and then average the obtained multiple pulses, so the sensitivity of the control system is low

Method used

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  • A signal processing method and device
  • A signal processing method and device
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Experimental program
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Effect test

Embodiment 1

[0050] figure 1 It is a flow chart of a signal processing method provided by Embodiment 1 of the present invention. This embodiment is applicable to controlling the rotational speed of a brushless motor, and the brushless motor is preferably a three-phase brushless motor. This method can be carried out by micro control unit, specifically comprises the following steps:

[0051] S11, when the micro control unit MCU receives the target Hall feedback signal sent by the motor control unit, a Hall feedback interrupt is generated.

[0052] In the application scenario of a three-phase brushless motor, the generation of the target Hall feedback signal is firstly generated by the micro control unit with a fixed frequency pulse width modulation (PulseWidth Modulation, PWM) waveform, which is provided to the brushless motor control chip, and the control chip generates The three-phase PWM control signal is output to the three-phase MOS tube, which is amplified by the MOS power drive and d...

Embodiment 2

[0061] figure 2 It is a flowchart of a signal processing method provided by Embodiment 2 of the present invention. Based on the above embodiment, the above micro control unit further includes an external interrupt module and a common timer, and the common timer is used by other modules to time the cycle measurement of the Hall feedback signals of at least two motors.

[0062] The function of the external interrupt module is to interrupt the internal execution state of the microcontroller unit when the microcontroller unit receives the target Hall feedback signal. The common timer is used to time the hall feedback signal of the motor. When the number of motors is extended to 2, 3 or more, after the Hall feedback signals of each motor are received by the micro control unit in sequence, the public timing will time them respectively according to the sequence of the Hall feedback signals of each motor .

[0063] The processing method of the Hall feedback signal provided in this...

Embodiment 3

[0071] image 3 It is a flowchart of a signal processing method provided by Embodiment 3 of the present invention. Based on the above-mentioned embodiments, the processing method of the Hall feedback signal specifically includes the following steps:

[0072] S31, when the micro control unit MCU receives the target Hall feedback signal sent by the motor control unit, generate a Hall feedback interrupt;

[0073] S32, acquiring the target duty ratio of the target Hall feedback signal;

[0074] S33. Find the first duty cycle whose configuration time is the longest from the current time from the preset duty cycle sequence,

[0075] updating the first duty cycle to a target duty cycle.

[0076] In this embodiment, the duty cycles in the preset duty cycle sequence are filled into a buffer that can accommodate all the duty cycles in the duty cycle sequence in chronological order, and the first one whose configuration time is the longest from the current time The duty cycle is the ...

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Abstract

The invention discloses a signal processing method and apparatus. The signal processing method includes the following steps that: when receiving target Hall feedback signals sent by a motor control unit, a micro control unit (MCU) generates Hall feedback interruption; the target duty ratio of the target Hall feedback signals is obtained; motor feedback signals are determined according to the target duty ratio and a preset duty ratio sequence, wherein the preset duty ratio sequence comprises at least two preset duty ratios; and the motor feedback signals are transmitted to a motor control chip, and the interruption return of the Hall feedback interruption is carried out, so that the motor control chip can adjust the rotation speed of a motor according to the motor feedback signals. According to the signal processing method and apparatus of the invention, the Hall feedback signals are processed, so that the sensitivity of motor speed control can be improved.

Description

technical field [0001] The embodiment of the present invention relates to the brushless motor speed control technology, in particular to a signal processing method and device. Background technique [0002] In today's industrial production and daily life, various equipment such as common printers, ATMs, washing machines and automobiles need power sources to drive. Brushless motors have low interference, low noise, long life and maintenance costs. It has been widely used due to low advantages, and the control of brushless motor speed is the focus of technical personnel. [0003] The control of the speed of the brushless motor is mainly through the following method. First, the Hall feedback signal of the motor is calculated, and then the signal output of the control chip in the motor is corrected according to the calculation result to realize the control of the motor speed. The way to detect and process the Hall feedback signal in the prior art is to obtain the signal duty rat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/06
CPCH02P6/06
Inventor 蒋红平
Owner SHENZHEN YIHUA COMP
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