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Inverter derating protection method and controller

An inverter and derating technology, applied in the direction of automatic disconnection emergency protection device, control system, AC motor control, etc. Small derating protection range, etc., to avoid over-temperature damage, improve output capability, and achieve the effect of over-temperature protection

Active Publication Date: 2022-05-27
合肥阳光电动力科技有限公司
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Problems solved by technology

[0004] Among them, the derating protection effect on the power tube is determined by the setting strategy of the derating curve. If the setting strategy is too conservative, the output capacity of the inverter cannot be fully utilized; if the setting strategy is too aggressive, the power tube The range of derating protection is small, and it is easy to cause over-temperature damage to the inverter when dealing with complex and changeable working conditions in practical applications.

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  • Inverter derating protection method and controller
  • Inverter derating protection method and controller

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Embodiment Construction

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0054]In this application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that any such relationship exists between these entities or operations. an actual relationship or sequence. Also the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a pro...

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Abstract

The present application relates to an inverter derating protection method and controller, which determines the derating coefficient of the inverter, and can wait for the time in the high temperature zone when the junction temperature of its own power tube rises above the initial protection value After the time limit of the limit value, the inverter is derated to run, that is, the power tube can still operate normally within the time limit value of the high temperature zone, thereby improving the output capacity of the inverter; and in the high temperature zone time limit value After a certain period of time, the inverter will be derated, and the inverter will resume normal operation after the junction temperature of its own power tube drops to less than or equal to the initial protection value and wait for a preset period of time, so as to avoid over-temperature damage to the power tube. , and then the derating protection method of the inverter realizes the over-temperature protection of the inverter; in summary, the derating protection method of the inverter provided by the present application takes both the output capability and the over-temperature protection of the inverter into consideration.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a derating protection method and a controller of an inverter. Background technique [0002] At present, during the operation of the inverter, the internal power tube has steady-state loss and dynamic loss. With the increase of its own loss, the heat is gradually serious. When its own temperature is too high, the power tube will be damaged, which will affect the inverter. The equipment carried by the inverter, such as the normal operation of the motor. [0003] Therefore, a derating protection device is provided in the inverter, so that when the temperature of the power tube in the inverter is too high, according to the set derating curve, the power tube in it is derated and protected, that is, to reduce the reverse voltage. The temperature of the power tube in the inverter. [0004] Among them, the derating protection effect of the power tube is determined by the sett...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02H7/122H02H5/04H02P27/08
CPCH02M1/32H02H7/122H02H5/04H02P27/085
Inventor 周鹏陈文杰
Owner 合肥阳光电动力科技有限公司
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