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Temperature control method and device for power module of frequency converter

A temperature control method and power module technology, applied in heating and ventilation control systems, control inputs involving air characteristics, space heating and ventilation control inputs, etc., can solve problems such as incoherent system operation and reduced user experience, To achieve the effect of ensuring safe and stable operation

Active Publication Date: 2017-05-17
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

When this control method is used, once the internal temperature of the power module is too high and the system performs protection detection actions, it often causes incoherent system operation and reduces user experience.

Method used

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  • Temperature control method and device for power module of frequency converter
  • Temperature control method and device for power module of frequency converter
  • Temperature control method and device for power module of frequency converter

Examples

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Embodiment Construction

[0027] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. Herein, various embodiments may be referred to individually or collectively by the term "invention", which is for convenience only and is not intended to automatically limit the scope of this application if in fact more than one invention is disclosed. A single invention or inventive concept. Herein, relational terms such...

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Abstract

The invention discloses a temperature control method and device for a power module of a frequency converter. The temperature control method for the power module of the frequency converter comprises the following steps: detecting an outdoor environment temperature; determining maximum permissible running current of the power module according to the outdoor environment temperature; and detecting actual running current of the power module, adjusting the actual running current, and enabling the actual running current to run in a maximum permissible running current range. According to the temperature control method for the power module of the frequency converter, the circumstance that a system carries out protection detection action due to over-high inside temperature of the power module can be avoided effectively, and therefore, the system can run safely and stably.

Description

technical field [0001] The invention relates to the technical field of variable frequency compressor control, in particular to a temperature control method and a control device for a frequency converter power module. Background technique [0002] In the current inverter air conditioner, the power module IPM is used. Its function is to convert the DC power into AC power under the action of the input control signal and load it on the controlled object such as the compressor or the motor to drive the compressor or the motor to run. By changing the frequency of the AC power applied to the compressor or motor, the automatic control of the compressor or motor speed is realized. Since such an intelligent power module often works under high current and high temperature, it is prone to failures such as overheating damage during long-term operation. [0003] At present, the most common method to solve the overheating damage of the intelligent power module is: implant the thermistor i...

Claims

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Application Information

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IPC IPC(8): F24F11/00
CPCF24F11/30F24F11/70F24F2110/00F24F2110/12
Inventor 王冰董德智国德防
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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