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PWM signal conversion method and conversion system

A PWM signal and conversion method technology, applied in the direction of pulse duration/width modulation, etc., can solve the problems of signal attribute differences, difficulty in matching controllers and slave devices from different manufacturers, and inability to achieve optimal design of device matching.

Active Publication Date: 2018-07-31
GREAT WALL MOTOR CO LTD
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Problems solved by technology

According to the current situation, it is found that the signal properties of PWM controllers and slave devices produced by different manufacturers will be slightly different. Because of this, it is difficult to realize the mutual matching of controllers and slave devices from different manufacturers, and it is impossible to realize the optimal design of equipment matching.

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  • PWM signal conversion method and conversion system
  • PWM signal conversion method and conversion system

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Embodiment Construction

[0027] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] like figure 1 As shown, the PWM signal conversion method according to one embodiment of the present invention includes the following steps:

[0030] S1: Obtain the information of the rising edge and the falling edge of the PWM input signal output by the first PWM device.

[0031] Specifically, the first PWM device is connected to the external interrupt pin of the single chip microcomputer used for signal collection, so as to obtain the information of the rising edge and the falling edge of the PWM input signal output by the first PWM device.

[0032] S2: Obtain the frequency and duty cycle of the PWM input signal according to the information of the rising edge and falling edge o...

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Abstract

The invention provides a PWM signal conversion method and conversion system. The method comprises the following steps: obtaining information of a rising edge and a falling edge of a PWM input signal output by a first PWM device; obtaining the frequency and a duty ratio of the PWM input signal according to the information of the rising edge and the falling edge of the PWM input signal; obtaining aPWM output signal according to the frequency and the duty ratio of the PWM input signal, and a signal change requirement; and transmitting the PWM output signal to a second PWM device, so that the second PWM device operates in accordance with the PWM output signal. By adoption of the method provided by the invention, the matching control between different single chip microcomputers can be achieved, and linear transformation and nonlinear transformation can also be performed on the PWM input signal; and the accuracy of signal transformation is improved by filtering out clutter.

Description

technical field [0001] The invention relates to the field of power control and conversion, in particular to a PWM signal conversion method and conversion system. Background technique [0002] PWM (Pulse-Width Modulation) is pulse width modulation, which has the advantages of simple control, flexibility and good dynamic response. It is widely used in the fields of measurement, communication, power control and conversion, especially in robots, drones, vehicles, chemical In the field of electrical control, it plays an increasingly important role. [0003] The main properties of a PWM signal include: frequency (or period) and duty cycle (or high level time). According to the current situation, it is found that the signal properties of PWM controllers and slave devices produced by different manufacturers will be slightly different. Because of this, it is difficult to realize the mutual matching of controllers and slave devices from different manufacturers, and it is impossible t...

Claims

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Application Information

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IPC IPC(8): H03K7/08
CPCH03K7/08
Inventor 李超杨丽孙明梁正伟郑磊
Owner GREAT WALL MOTOR CO LTD
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