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Infrared thermal imaging temperature detection in the power industry
- 2019-07-05-

Compared with data collectors and infrared point thermometers, infrared cameras have their own advantages: when detecting targets, they do not need to be powered off, are easy to operate, and respond quickly. The supporting infrared analysis software allows users to obtain the temperature of the power supply. The data is analyzed in detail and comprehensively, and a complete report is generated at the same time.

What are the applications of thermal imaging cameras in power detection?

Power supply temperature control is an important way to improve the reliability and service life of power modules and systems. In the design and application of the power supply, selecting the appropriate components, that is, reducing circuit losses, improving module conversion efficiency, and selecting a reasonable cooling method are the key technologies to ensure the reliable and stable operation of the power supply. The organic combination of the two will make the power supply have Technical advantages such as stronger adaptability to the environment, long life, low cost, and easy maintenance.

Infrared cameras can provide clear images of the temperature distribution of the power circuit and its entire power system and accurate temperature measurements.


1 ) Electronic components

A power supply is a kind of electrical energy conversion equipment. During the conversion process, it needs to consume some electrical energy, and this electrical energy is converted into heat and released. The stability of electronic components and the aging rate are closely related to the ambient temperature. Whenever the ambient temperature rises by 10 ° C , the life of the main power components is reduced by 50 %, which requires that the electronic components should work in a relatively stable and low temperature range.

Infrared thermal imaging cameras can provide engineers with thermal maps of the heating conditions of various components in the circuit of the engineer, help engineers analyze the impact of the components on the temperature of the entire power circuit, and also help engineers choose a conversion module with a suitable load capacity.


2 ) Transformer

Transformer is the main component of power supply, and its heating temperature is limited. At present, domestic 3C certification limits the transformer temperature to 120 , and European UL certification limits the transformer temperature to 115 . The main heating source of the power supply is also the transformer, and the core loss and copper loss are the main reasons for the temperature rise of the transformer. In addition, as the transformer's operating temperature increases, the core load will inevitably be weakened, and the coil will age, and when its insulation performance is reduced, the ability to withstand the impact of the utility power will be weakened. At this time, if there is a lightning strike or a mains surge, the high reverse voltage that appears in the primary stage of the transformer will break down the transformer and cause the power supply to fail. At the same time, high voltage will be connected to the main equipment, causing the main equipment to be damaged.

The thermal imager provides accurate transformer temperature through quick and easy operation.


3 ) Circuit heat distribution

The components of the same circuit board should be arranged as much as possible according to the amount of heat generated and the degree of heat dissipation. A reasonable arrangement of the components can effectively reduce the temperature rise of the printed circuit, thereby significantly reducing the failure rate of the components and equipment.

The infrared thermal imager can help engineers analyze the temperature distribution of the entire circuit board by providing the infrared thermal map, and improve the engineer's design and application.


4 ) Power supply cooling

Power cooling technology is the basic means to meet the various technical performance requirements of the industry. At present, there are three common cooling methods for each power module: natural cooling, pure fan cooling, natural cooling and fan cooling.

There is a large transformer and some large capacitors in power products. These are large heat sources. These heat sources may affect the stability and service life of some other circuits and components in your product. . The use of infrared thermal imaging cameras can directly measure the heat generation and heat dissipation in three cases. Engineers improve the design, use reasonable cooling methods in practical applications, improve the reliability and stability of the power supply, and reduce the failure rate of the equipment.


5 ) Process improvement

During the processing of power equipment, process problems are prone to occur at the joints and crimping lines. Using thermal imaging cameras can more easily, intuitively and safely find fault points, helping production personnel and quality inspectors to better find and solve problems and improve product quality.

In addition to the R & D department, the application department of the infrared camera in the power supply company mainly includes: quality control department, after-sales service department and equipment maintenance department.