PWM wave dead zone generating circuit

A technology for generating circuits and dead zones, applied to electrical components, output power conversion devices, etc., can solve the problems of high cost, poor repeatability, and many signal lines for PWM wave dead zone generation circuits, and achieve easy adjustment, improved accuracy, The effect of fewer transmission cables

Inactive Publication Date: 2014-12-17
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a PWM wave dead zone generation circuit, which is used to solve

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[0036] The following describes the implementation of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0037] See Figure 1 ~ Figure 2 . It should be noted that the illustrations provided in this embodiment only illustrate the basic idea of ​​the present invention in a schematic way, and the figures only show the components related to the present invention instead of the number, shape, and shape of the components in actual implementation. For size drawing, the type, quantity, and proportion of each component can be changed at will during actu...

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Abstract

The invention discloses a PWM wave dead zone generating circuit, and the PWM wave dead zone generating circuit comprises a frequency multiplier generating high frequency clock signal; a dead zone generating module generating PWM wave signal of band dead zone; a straight protection monitoring module monitoring and protecting the PWM wave signal of band dead zone generated by the dead zone generating module and avoiding short circuit while the switches are in breakover mode. The input clock signal is the low speed difference clock signal, the anti-interference performance is strong, the generated PWM wave signal and the PWM wave signal output by the main controller are kept on phase synchronization and the operation is easily realized; the PWM wave signal with dead zone is generated in a digital mode and the dead zone time is easily adjusted, the consistency is high; the PWM wave signal is generated by the frequency doubling high speed clock for greatly raising the precision; the PWM wave signal and the clock signal are transmitted, the transmission cable for multi-path transmission is little and simple and the interference is small.

Description

technical field [0001] The invention relates to the field of power electronic control, in particular to a PWM wave dead zone generation circuit. Background technique [0002] Power electronics technology is one of the most widely used technologies in the 21st century. With the increasing role of power electronics technology in the national economy, the development of power electronics technology is also very rapid. Therefore, the requirements for the performance and reliability of power electronic systems are getting higher and higher. [0003] Typically in power electronic converters, PWM waves are used to control switching devices. The main controller generates control signals and PWM signals; the drive circuit receives the control signals and PWM signals from the main controller, processes the control signals and PWM signals, and outputs PWM waves that meet the control requirements to control the switches in the power electronic converter device. Signal transmission mu...

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Application Information

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IPC IPC(8): H02M1/38H02M1/08
Inventor 张琨锋曹彬
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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