Power module driving circuit and air conditioner

A technology for driving circuits and power modules, applied in the field of frequency converters, can solve problems such as bridge arm pass-through, and achieve the effects of avoiding pass-through, reducing operating costs, and improving operational reliability.

Pending Publication Date: 2022-01-07
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the problem in the prior art that the bridge arm is directly connected due to the M

Method used

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  • Power module driving circuit and air conditioner
  • Power module driving circuit and air conditioner
  • Power module driving circuit and air conditioner

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Embodiment Construction

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, 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.

[0025] Thus, a feature indicated in this specification will be used to describe one of the features of an embodiment of the present invention, rather than implying that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes a number of features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly described. Thus, the illustrated combinations are not intended to be limiting unless oth...

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Abstract

The invention discloses a power module driving circuit and an air conditioner, the power module driving circuit comprises a switch driving circuit and a power supply circuit for supplying power to the switch driving circuit, the switch driving circuit comprises at least one bridge arm formed by connecting switch tubes in series, and the power module driving circuit further comprises a fault-tolerant circuit connected between the switch driving circuit and the power supply circuit, and and the fault-tolerant circuit discharges the Miller current generated by the switching tube. Compared with the prior art, the Miller current is discharged through the fault-tolerant circuit, and the problem that the same bridge arm in the switch driving circuit is straight through and the power module is blown up is solved.

Description

technical field [0001] The invention relates to the technical field of frequency converters, in particular to a power module drive circuit and an air conditioner. Background technique [0002] At present, the intelligent power module (IPM) has been widely used in power electronic devices represented by inverters and various power supplies, and its internal switch tube is usually an IGBT. When using a high-performance IGBT drive circuit to work, it can reduce switching delay and switching loss to obtain good turn-on and turn-off performance, which plays a key role in the reliable operation of the inverter. When the IGBT is switched, due to the parasitic capacitance of the bridge arm of the inverter, that is, the Miller capacitance. At higher rates of voltage change The induced current is generated under the current, and a voltage spike is formed through the resistance, which may cause the IGBT to be turned on by mistake, the inverter bridge arm to pass through, and the int...

Claims

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Application Information

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IPC IPC(8): H02M1/32H02M1/08
CPCH02M1/32H02M1/08
Inventor 李修贤杨湘木杨帆郑嘉良赵浩
Owner GREE ELECTRIC APPLIANCES INC
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