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Direct-current electronic load radiator

A DC electronic load and radiator technology, which is applied to the parts, instruments, and measuring electrical variables of electrical measuring instruments, can solve problems such as affecting the sampling accuracy of sampling resistors, and achieve the effects of simple structure, reasonable design and convenient assembly.

Pending Publication Date: 2021-12-24
BEIJING DAHUA RADIO INSTR FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the PCB layout, based on the rationality of the current flow direction, the sampling resistor is placed on the back side of the chassis. The temperature in this area is relatively high. If the radiator is not specially treated, the sampling accuracy of the sampling resistor will be seriously affected.

Method used

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  • Direct-current electronic load radiator
  • Direct-current electronic load radiator
  • Direct-current electronic load radiator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the radiator is divided into three parts: MOS tube radiator 11 (1), sampling resistor radiator 12 (2), and heat shield 13 (2), which are used as a set.

[0043] Such as diagram 2-1 As shown, there are multiple M3 threaded holes 1 on the MOS tube radiator, which are used to fix the MOS tube, and the MOS tube is attached to the surface of the radiator for heat dissipation; there are 6 M3 pressure riveting nuts on the left and right sides of the MOS tube radiator Column 2, can be used to fix the PCB board;

[0044] Such as Figure 2-2 As shown, there are 2 rectangular notches on the rear side of the MOS tube radiator, and there are 4 M3 threaded holes 3 on the side of the radiator. The heat shield 13 can be fixed to the threaded holes of the MOS tube radiator with countersunk screws 14 of GB / T 819M3X8 3 on.

[0045] Such as Figure 3-1 As shown, the sampling resistor radiator is a flat radiator. There are two M3 rivet nuts 4 on it, which c...

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PUM

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Abstract

The invention discloses a direct-current electronic load radiator which comprises an MOS transistor radiator, wherein sampling resistor radiators are arranged on the two sides, which are close to the rear end, of the MOS transistor respectively, and a heat insulation plate is arranged between the MOS transistor radiator and the sampling resistor radiators. The heat insulation plate is integrated by adopting a detachable structure, a radiator of the sampling resistor and a radiator of the MOS transistor are isolated, and the problem that the temperature of the sampling resistor is high is effectively solved. The radiator is reasonable in design, simple in structure and convenient to assemble on the basis of effectively retaining functions, and meets a certain anti-seismic grade and a certain flame retardant grade.

Description

technical field [0001] The invention relates to a power testing device, in particular to a radiator for a DC electronic load. Background technique [0002] DC electronic load is an instrument with excellent load accuracy, load stability and adjustment control. Its outstanding characteristics make it widely used in experiments, tests, verifications, aging and other links of power products and power electronic components. [0003] In the power board of the load in the prior art, there is a sampling resistor, and its sampling accuracy directly determines the accuracy of the load. The sampling resistor is a thermally sensitive device, and the temperature has a serious impact on its sampling accuracy. In the PCB layout, based on the rationality of the current flow, the sampling resistor is placed on the back side of the chassis. The temperature in this area is relatively high. If the heat sink is not specially treated, the sampling accuracy of the sampling resistor will be serio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K7/20G01R1/20
CPCH05K7/2039G01R1/203
Inventor 陈士伟
Owner BEIJING DAHUA RADIO INSTR FACTORY