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Method for controlling dead time of PWM signal, controller and related electronic equipment

A technology of PWM signal and dead time, applied in the field of electric pulse, can solve problems such as complex circuits

Pending Publication Date: 2021-12-07
北京维普无限智能技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the system uses a large number of PMOS transistors, NMOS transistors and logic gate circuits, and the circuit is relatively complicated.

Method used

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  • Method for controlling dead time of PWM signal, controller and related electronic equipment
  • Method for controlling dead time of PWM signal, controller and related electronic equipment
  • Method for controlling dead time of PWM signal, controller and related electronic equipment

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Embodiment Construction

[0052] The technical content of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] figure 1 It is a flowchart of a method for controlling the dead time of a PWM signal provided by the first embodiment of the present invention. The method at least includes the following steps:

[0054] Step S1, start the first PWM waveform generator, so that the first PWM waveform generator outputs the first signal; the first PWM waveform generator is negative;

[0055] Step S2, waiting for a predetermined time;

[0056] Step S3, start the second PWM waveform generator, so that the second PWM waveform generator outputs the second signal; the second PWM waveform generator is positive;

[0057] Wherein, the frequency of the first signal is the same as the frequency of the second signal, and the dead time is the sum of the predetermined time and the execution time of step S3; the dead time, the duty ratio of t...

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Abstract

The invention discloses a method for controlling dead time of a PWM signal, a controller and related electronic equipment. The method comprises the following steps: S1, starting a first PWM waveform generator to enable the first PWM waveform generator to output a first signal, wherein the first PWM waveform generator has negative polarity; S2, waiting for preset time; and S3, starting a second PWM waveform generator to enable the second PWM waveform generator to output a second signal, wherein and the second PWM waveform generator has positive polarity. According to the invention, after a first signal output by a first PWM signal generator has a falling edge, a second PWM signal generator outputs a high level of a second signal by waiting for a dead zone time, and the duty ratio of the output signals of the two PWM signal generators is controlled to ensure that the falling edge of the second signal at least passes through the dead zone time; the first signal has high level, and the signals output by the two PWM signal generators are ensured not to have high level at the same time through two dead zone time.

Description

technical field [0001] The invention relates to a method for controlling the dead time of a PWM signal, and at the same time relates to a controller for controlling the dead time of a PWM signal and related electronic equipment, belonging to the technical field of electric pulses. Background technique [0002] PWM (Pulse Width Modulation) is the abbreviation of Pulse Width Modulation. It is by modulating the width of a series of pulses, equivalent to the required waveform (including shape and amplitude), and digitally encoding the analog signal level, that is to say, adjusting the signal and energy by adjusting the change of the duty cycle etc. changes. [0003] In recent years, the smart home industry has become a new outlet. In the field of smart home, PWM is widely used, such as smart lamps. The requirements of smart homes for PWM signals are becoming higher and higher. Smart home appliances often use two power devices before and after. Power devices generally have a d...

Claims

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Application Information

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IPC IPC(8): H02M1/38H02M1/088
CPCH02M1/38H02M1/088
Inventor 肖良欧曦李萌白俊华董俊丽
Owner 北京维普无限智能技术有限公司
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