A Measuring Method of Steady State Thermal Resistance of Darlington Tube Based on Electrical Method
A Darlington tube and measurement method technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of deviation, too small changes in thermally sensitive parameters, unable to obtain accurate thermal resistance values, etc., to reduce the measurement Error, the effect of avoiding error
Active Publication Date: 2019-11-29
BEIHANG UNIV
View PDF16 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The thermal resistance value of each device has a certain deviation due to process problems, and the accurate thermal resistance value cannot be obtained from the product manual
[0005] The measurement method of the transient thermal resistance of the Darlington tube has been involved at home and abroad, but because the transient thermal resistance is a test result in an unstable state, the change of thermal sensitive parameters is too small, and the accuracy of the test instrument is high, so it is difficult to Difficult to get accurate results
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0088] The measurement method described in the present invention takes BDW47G as an example for testing. Combined with specific practical cases, a method for measuring the steady-state thermal resistance of a Darlington tube described in the present invention is described in detail.
[0089] The present invention proposes a method for measuring the steady-state thermal resistance of a Darlington tube based on an electrical method, the flow chart of which is as follows figure 1 As shown, the specific implementation steps are as follows:
[0090] Step 1: Select the Darlington tube BDW47G, and select the PN junction as the measurement object, such as figure 2 At the position indicated by label 1, the forward voltage drop is collected as a temperature-sensitive electrical parameter, and the symbol is marked as V CE . The test condition for determining temperature-sensitive electrical parameters is a constant small current of 10mA;
[0091] Step 2: Check the electrical paramet...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a Darlington tube thermal resistance measuring method based on an electrical method. The measuring method comprises the steps of (1) selecting a Darlington tube, selecting a temperature-sensitive electrical parameter that is a forward voltage drop of a PN junction, and determining a test condition of the temperature-sensitive electrical parameter, (2) viewing electrical parameter information in a device manual and designing a measurement circuit and a working circuit, (3) calculating a temperature coefficient M, (4) recording the arrival and data of a steady state condition of the device, (5) carrying out a junction temperature measurement test, (6) carrying out junction temperature error correction processing, and (7) calculating device thermal resistance. Through the above steps, the steady-state thermal resistance of the Darlington tube can be calculated by using the electrical method and an error processing method, an accurate acquisition method of the steadystate thermal resistance of the Darlington tube can be provided for a device user, accurate thermal performance parameters are provided for the use process of the device, and the maximum junction temperature use of the device is avoided.
Description
[0001] (1) Technical field: [0002] The invention provides a method for measuring the steady-state thermal resistance of a Darlington tube based on an electrical method, which relates to a method for measuring the thermal resistance of electronic components. It mainly aims at the use requirement of accurate thermal resistance value when the device is in use, and designs a method and data processing method for the steady-state thermal resistance measurement of the device, which belongs to the field of electronic component performance parameter measurement. [0003] (2) Background technology [0004] Thermal resistance is an important thermal characteristic parameter of power devices, which affects the junction temperature and is also used to determine the device junction temperature and the safe operating temperature range of power devices. Steady-state thermal resistance is the junction temperature T after applying constant power J and shell temperature T C All reached the m...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/26
CPCG01R31/2619
Inventor 高成王怡豪张科辉张利彬林晶晶
Owner BEIHANG UNIV