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Negative-logical IGBT/MOSFET driving circuit, driving system and driving method, and air conditioner

A drive circuit and drive system technology, applied in the direction of control/regulation systems, general control systems, instruments, etc., can solve problems such as being vulnerable to supply restrictions, single use environment of drive ICs, and high purchase prices, so as to reduce manufacturing costs and risk, reduce material cost, and enhance competitiveness

Inactive Publication Date: 2015-12-02
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Since the integrated driver IC is a special-purpose device, for the controller circuit designer, it will face problems such as a single use environment for the driver IC, easy to be limited by supply, and high purchase price.
In addition, if the previously used driver IC is out of the market, the controller circuit designer will have to re-select alternative products and re-develop, which will bring a series of unpredictable losses

Method used

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  • Negative-logical IGBT/MOSFET driving circuit, driving system and driving method, and air conditioner
  • Negative-logical IGBT/MOSFET driving circuit, driving system and driving method, and air conditioner
  • Negative-logical IGBT/MOSFET driving circuit, driving system and driving method, and air conditioner

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Embodiment Construction

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0029] figure 2 It is a structural diagram of an inverse logic IGBT / MOSFET drive circuit according to Embodiment 1 of the present invention.

[0030] Such as figure 2 As shown, an anti-logic IGBT / MOSFET drive circuit is characterized in that it includes two-stage drive circuits, which are respectively a first-stage drive circuit and a second-stage drive circuit; the first-stage drive circuit is electrically connected to the second-stage drive circuit ; The first-level drive circuit is used to convert the I / O drive level of the controller MCU to a specific drive level, wherein the value of the specific drive level can be determined according to needs, and the preferred value range is 15V-18V; the second The stage...

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Abstract

The invention relates to a negative-logical IGBT / MOSFET driving circuit, driving system and driving method, and an air conditioner. The negative-logical IGBT / MOSFET driving circuit comprises two stages of driving circuits, i.e., a first stage of driving circuit and a second stage of driving circuit; the first stage of driving circuit is used for converting the I / O driving level of a low voltage MCU into a specific driving level, and the second stage of driving circuit is used for ensuring the saturation conduction of a driving object IGBT / MOSFET. According to the invention, a cheap and general two-stage triode replaces a routine special-purpose integrated driving IC to control a high current IGBT / MOSFET, thereby reducing the manufacture cost and risk of a control circuit designer under the condition of not changing original performances; in addition, compared with a positive logic driving circuit, the negative-logical driving circuit can greatly reduce material costs and the dependence on a provider under the condition of not changing original performances, thereby enhancing the competitive power of a control circuit provider.

Description

technical field [0001] The invention relates to the field of air conditioner control, in particular to an inverse logic IGBT / MOSFET drive circuit, a drive system, a drive method and an air conditioner. Background technique [0002] Traditional air-conditioning controllers are not suitable for directly driving high-current IGBT / MOSFET due to the low output voltage of the I / O port of the MCU and weak load capacity, so a conversion circuit must be passed to ensure that the IGBT / MOSFET works in the saturation region . The conventional practice is: the I / O of the MCU generates PWM output, generally 3.3V or 5V drive level, which is converted into a 15V output level drive signal through a dedicated integrated driver IC, and drives and controls the IGBT / MOSFET, using a dedicated integrated driver The schematic diagram of IC driving IGBT / MOSFET is as follows: figure 1 shown. [0003] Since the integrated driver IC is a special-purpose device, for the controller circuit designer, i...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/042G05B2219/25314Y02P80/40
Inventor 郭绍新贺伟衡刘校强杨大有周峰康力刘启国
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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