Temperature detection method and device
A detection method and temperature difference technology, applied in the electromechanical field, can solve the problems of low reliability and low protection efficiency of three-phase IGBT modules, and achieve the effect of improving protection efficiency
Active Publication Date: 2019-09-20
WEICHAI POWER CO LTD
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Problems solved by technology
However, in actual situations, even if the temperature of the three-phase IGBT module is lower than the preset temperature, when the temperature difference between any two phase IGBT modules of the three-phase IGBT module is large, the three-phase IGBT module is actually in an abnormal working state
Therefore, the existing temperature detection method for the three-phase IGBT module has low protection efficiency and low reliability for the three-phase IGBT module
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[0076] Optionally, see image 3 , in a specific embodiment of the application, an implementation of step S104 may include:
[0077] S301. Determine whether the temperature difference between any two-phase IGBT modules among the temperatures of the three-phase IGBT modules is greater than a first temperature difference threshold and less than a second temperature difference threshold.
[0078] Wherein, the second temperature difference threshold is greater than the first temperature difference threshold. When step S301 is executed, it is judged whether the difference between the temperature of the C-phase IGBT module and the temperature of the A-phase IGBT module is greater than the first temperature difference threshold and smaller than the second temperature difference threshold; Whether the difference is greater than the first temperature difference threshold and less than the second temperature difference threshold; and whether the difference between the temperature of the...
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The invention discloses a temperature detection method and device. The temperature detection method comprises the steps of acquiring the temperatures of three phases of IGBT (Insulated Gate Bipolar Transistor) modules, wherein the three phases of IGBT modules include an A-phase IGBT module closest to a water inlet of a motor, a C-phase IGBT module closest to a water outlet of the motor and a B-phase IGBT module located between the A-phase IGBT module and the C-phase IGBT module; if the temperatures of the three phases of IGBT modules meet normal operation conditions of the motor, judging whether the temperature difference of any two phases of IGBT modules in the temperatures of the three phases of IGBT modules is greater than a first temperature threshold or not; and if it is judged that the temperature difference of any two phases of IGBT modules in the temperatures of the three phases of IGBT modules is greater than the first temperature threshold, taking a first protection measures to the motor, wherein the first protection measure is used for reducing the operation of the motor. The temperature difference of any two phases of IGBT modules of the three phases of IGBT modules is detected under the normal operation of the motor, so that the protection efficiency of the three phases of IGBT modules is improved.
Description
technical field [0001] The invention relates to the field of electromechanical technology, in particular to a temperature detection method and device. Background technique [0002] The motor controller is an integrated circuit that controls the motor to work according to the set direction, speed, angle, and response time through active work. It is used in many fields such as automobiles and home appliances. The insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) module is the core module of the motor controller. In order to ensure the stable operation of the motor controller, it is necessary to detect the temperature of the three-phase IGBT module to realize the protection of the three-phase IGBT module . [0003] In the prior art, when the motor is running normally, the temperature detection method of the three-phase IGBT module usually samples the temperature of the three-phase IGBT module, and compares the sampled three-phase IGBT module temperatu...
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IPC IPC(8): H02H7/085G01K13/00G01R31/34
CPCH02H7/085G01K13/00G01R31/343
Inventor 张正兴徐英洲吕凤龙黄枭凯
Owner WEICHAI POWER CO LTD