Temperature control method of intelligent power module and frequency conversion device

A technology of intelligent power module and temperature control method, which is applied in the field of frequency conversion system, can solve problems such as incoherent system operation and user troubles, and achieve the effect of ensuring continuity and improving comfort

Active Publication Date: 2013-12-04
HISENSE (SHANDONG) AIR CONDITIONING CO LTD
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Problems solved by technology

[0004] With this kind of protection measures, once the internal temperature Tc of the intelligent power module is too high and the system execute

Method used

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  • Temperature control method of intelligent power module and frequency conversion device
  • Temperature control method of intelligent power module and frequency conversion device
  • Temperature control method of intelligent power module and frequency conversion device

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Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] In this embodiment, in order to limit the internal temperature rise of the intelligent power module so that it can always work in a safe temperature range to ensure the continuity of system operation, a method is proposed to reduce the output frequency of the intelligent power module by limiting the output frequency of the intelligent power module. The temperature rise control strategy is to regularly detect the internal temperature Tc of the intelligent power module, and when the internal temperature Tc is close to the set safety threshold Tmax, control the output frequency of the intelligent power module to reduce or maintain the current frequency. To achieve the purpose of limiting the temperature rise of the intelligent power module.

[0028] Specifically, according to the temperature response characteristics of the intelligent powe...

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Abstract

The invention discloses a temperature control method of an intelligent power module and a frequency conversion device. The method comprises the steps that the inner temperature Tc of the intelligent power module is detected; when the temperature Tc approaches a set safety threshold Tmax, the output frequency of the intelligent power module is controlled to descend or the current frequency is maintained, so that the rise of the temperature of the intelligent power module is limited. According to the temperature control method of the intelligent power module, frequency rise limitation motion or frequency reduction motion is conducted before the inner temperature of the intelligent power module reaches the protecting detection temperature, so that the temperature of the intelligent power module is controlled in a safe range all the time without protecting detection, the intelligent power module is operated stably at the safe and reliable temperature, meanwhile, the consistency of system operation is guaranteed, and the use comfort of frequency conversion household appliance users is improved.

Description

technical field [0001] The invention belongs to the technical field of frequency conversion systems, and in particular relates to a method for controlling the temperature rise of an intelligent power module and a frequency conversion device designed using the temperature control method. Background technique [0002] In the current frequency conversion air conditioner or other frequency conversion household appliances, the intelligent power module IPM is often used, and its function is to convert the DC power into AC power under the action of the input control signal and load it to the controlled object such as the compressor or the motor. Above, it drives the compressor or the motor to run, and by changing the frequency of the AC power applied to the compressor or the motor, the automatic control of the speed of the compressor or the motor is realized. Since such an intelligent power module often works under high current and high temperature, it is prone to failures such as...

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Application Information

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IPC IPC(8): H02M7/00G05D23/19
Inventor 张永良殷显鑫王宗良孙德伟
Owner HISENSE (SHANDONG) AIR CONDITIONING CO LTD
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