Junction temperature adjusting circuit and junction temperature adjusting method

A technology for regulating circuits and executing circuits, applied to electrical components, output power conversion devices, etc., can solve problems such as junction temperature fluctuations and power device failures, and achieve the effects of compensating for junction temperature drops and reducing turn-on losses

Pending Publication Date: 2022-05-13
BEIHANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

According to the Coffin-Manson model, junction temperature fluctuations are the main cause of power device failure

Method used

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  • Junction temperature adjusting circuit and junction temperature adjusting method
  • Junction temperature adjusting circuit and junction temperature adjusting method
  • Junction temperature adjusting circuit and junction temperature adjusting method

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Embodiment Construction

[0044] The present disclosure will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only parts related to the present disclosure are shown in the drawings.

[0045] It should be noted that, in the case of no conflict, the implementation modes and the features in the implementation modes in the present disclosure can be combined with each other. The present disclosure will be described in detail below with reference to the drawings and embodiments.

[0046] Three-terminal transistors include bipolar transistors (such as IGBTs) or field effect transistors (such as MOSFETs); And one of the second poles is the source or collector and the other is the drain or emitter.

[0047] refer to figure 2 As shown, some embodiments of ...

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Abstract

The invention relates to a junction temperature adjusting circuit and a junction temperature adjusting method thereof, the junction temperature adjusting circuit comprises a main three-terminal transistor and a current control circuit, the current control circuit is used for obtaining a current difference between a load current and a preset reference current based on the load current on the main three-terminal transistor when the main three-terminal transistor is conducted; when the current difference is smaller than a preset first threshold current, the current of an on-off signal input to the control electrode of the main three-terminal transistor is reduced, and when the current difference is larger than a preset second threshold current, the current of the on-off signal input to the control electrode of the main three-terminal transistor is increased; the second threshold current is greater than or equal to the first threshold current. In the invention, the current control circuit not only can adjust the turn-on loss of the three-terminal transistor and smooth junction temperature fluctuation, but also can reduce voltage and current oscillation in the turn-on process, so that the expected service life of the three-terminal transistor is remarkably prolonged, and the reliability of the system is further improved.

Description

technical field [0001] The disclosure belongs to the technical field of power electronics, and in particular relates to a junction temperature regulating circuit and a junction temperature regulating method. Background technique [0002] As a large number of power electronic devices used in aerospace, electric / hybrid vehicles, oil exploration and other non-stationary working conditions are put into operation, the reliability of power devices has become increasingly prominent. According to the Coffin-Manson model, junction temperature fluctuation is the main cause of failure of power devices. Therefore, smoothing the junction temperature fluctuation of the main three-terminal transistor can effectively prolong its life and improve the reliability of the main three-terminal transistor converter. Contents of the invention [0003] In order to solve the above technical problems, the first object of the present disclosure is to provide a junction temperature regulation circuit...

Claims

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Application Information

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IPC IPC(8): H02M1/08H02M1/32
CPCH02M1/08H02M1/32
Inventor 丁晓峰宋心荣
Owner BEIHANG UNIV
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