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Power device tube core temperature estimation method and device

A power device and die technology, applied in the field of device and power device die temperature calculation method, can solve unfavorable power reduction and over-temperature protection measures, cannot guarantee stable output high power of power devices, and cannot accurately reflect the junction temperature of power devices and other problems to achieve the effect of saving costs and avoiding inaccurate temperature measurement.

Pending Publication Date: 2021-12-24
HANGZHOU ZHOUJU ELECTRONICS TECHNOLOGICAL
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Problems solved by technology

[0003] At present, the temperature of power devices is mostly collected by thermistors arranged around the devices, which cannot accurately reflect the junction temperature of power devices, which is not conducive to the implementation of power reduction and over-temperature protection measures, so it is impossible to ensure stable high-power output of power devices

Method used

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  • Power device tube core temperature estimation method and device
  • Power device tube core temperature estimation method and device
  • Power device tube core temperature estimation method and device

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Embodiment Construction

[0049] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0050] In one embodiment, a specific application scenario of a power device die temperature estimation method is provided, such as figure 1 As shown, the main controller 101 controls the power device 103 through the driver 102, the main controller 101 sends a weak current drive signal and converts it into a strong current drive signal through the driver 102, the power device 103 controls the current input to the motor 104, and the sampling module 105 controls the power The current output by the device 103 is sampled, and then the maximum current differential value of the s...

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Abstract

The invention relates to a power device tube core temperature estimation method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a weak current driving signal output by a main controller; acquiring the position of a power device in a circuit according to the weak current driving signal; according to the position of the power device in the circuit, performing current sampling of the power device in the process from off to on; calculating the maximum current differential value of the current differential of the current sampling, and searching the temperature corresponding to the tube core of the power device from a pre-stored current differential thermometer according to the maximum current differential value; and when the temperature exceeds a preset range, executing a power device die temperature protection strategy. By adopting the method, the accuracy of calculating the tube core temperature of the power device can be improved.

Description

technical field [0001] The present application relates to the technical field of three-phase inverter power devices, in particular to a method and a device for calculating the core temperature of a power device. Background technique [0002] The power device is the core part of the three-phase inverter and the core device for high-power output. In order to ensure that the power device can output power stably and safely, it is necessary to know the die temperature of the power device in real time to do a good job in power reduction and over-temperature protection. measure. [0003] At present, the temperature of power devices is mostly collected by thermistors arranged around the devices, which cannot accurately reflect the junction temperature of power devices, which is not conducive to the implementation of power reduction and over-temperature protection measures, so it is impossible to guarantee stable high power output of power devices. Therefore, there is an urgent need...

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Application Information

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IPC IPC(8): G01R31/26
CPCG01R31/2601
Inventor 邵锦敏郑欢李千里王世武
Owner HANGZHOU ZHOUJU ELECTRONICS TECHNOLOGICAL
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