PWM wave adaptive generating circuit, an inverting circuit and air conditioner

A generation circuit and self-adaptive technology, which is applied in the direction of electrical components, AC power input conversion to DC power output, output power conversion devices, etc., can solve the problems of IGBT upper and lower bridges and other problems, so as to reduce the difficulty and improve the driving efficiency. The effect of reliability and simple structure

Inactive Publication Date: 2019-10-01
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to solve the defect that the IGBT upper and lower bridges are easy to pass through in the prior art, the present invention proposes a PWM wave adaptive generation circuit, an inverter circuit and an air conditioner using the circuit

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  • PWM wave adaptive generating circuit, an inverting circuit and air conditioner
  • PWM wave adaptive generating circuit, an inverting circuit and air conditioner

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[0017] In order to make the object, technical solution and advantages of the present invention more clear, 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.

[0018] The invention provides a simple hardware control method, through the technology of interlocking on the hardware and automatically generating PWM waves of the upper and lower bridges according to the logic, the on-off of the IGBT can be controlled more simply and reliably.

[0019] The invention discloses a PWM wave self-adaptive generating circuit, which comprises a PWM wave generating module and a driving module connected to the output end of the PWM wave generating module, and an inverting module is also arranged between the output end of the PWM wave generating module and the driving mo...

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Abstract

The invention discloses a PWM wave adaptive generating circuit, which includes a PWM wave generating module and a driving module connected with the output end of the PWM wave generating module. A phase reversing module is arranged between the output end of the PWM wave generating module and the driving module, so that the driving module can obtain two opposite PWM waves. The driving module drivesa post-stage power switch according to the two opposite PWM waves. Through a simple hardware circuit, self-adaptive on-off control of IGBT is realized, the difficulty of software development is reduced, the damage of the driving board caused by direct connection of the upper and lower bridges of IGBT is prevented, and the driving reliability is improved. At the same time, the PWM wave adaptive generating circuit has the advantages of simple structure, fewer devices, low cost and high reliability.

Description

technical field [0001] The invention relates to a PWM wave control circuit, in particular to a PWM wave self-adaptive generation circuit, an inverter circuit and an air conditioner using the circuit. Background technique [0002] At present, for the drive board used in the inverter air conditioner, the control of the IGBT drive adopts PWM wave control, see figure 1 , mainly the main chip sends out six PWM waves through algorithm calculation, and then controls the IGBT on and off to realize frequency conversion, but if the main program control is abnormal, or the sampling feedback part is abnormal, it will lead to control confusion, and even the phenomenon of direct connection between the upper and lower bridges , leading to serious accidents such as fried boards. [0003] Therefore, it is an urgent technical problem to be solved in the industry to design an adaptive PWM wave control circuit to prevent the phenomenon of IGBT upper and lower bridge through-through. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/38H02M1/088H02M7/5387
CPCH02M1/088H02M1/38H02M7/5387H02M7/53873H02M1/0012
Inventor 龙首江
Owner GREE ELECTRIC APPLIANCES INC
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