Frequency converter and insulation device of IGBT (Insulated Gate Bipolar Transistor) wiring terminal

Abstract

The invention discloses a frequency converter and an insulation device of an IGBT (Insulated Gate Bipolar Transistor) wiring terminal. The insulation device is provided with two terminal containing grooves corresponding to two wiring terminals at one end of an IGBT, wherein a fixing plate corresponding to a gap between the two wiring terminals is arranged between the two terminal containing grooves; fixing screws used for mounting and fixing are arranged at one end of the IGBT; and the insulation device is provided with bolt baffle plates for covering the fixing screws in a stretching manner. The frequency converter comprises the insulation device of the IGBT wiring terminal. The insulation device is inserted into the gap of the two wiring terminals at one end of the IGBT by the fixing plate in the middle for fixing, so that the insulation device can be well mounted and fixed; and the bolt baffle plates for covering the fixing screws are arranged on the two sides of the insulation device, so that creepage distances between the wiring terminals and the fixing screws are increased. In addition, the insulation device also increases creepage distances between the fixing screws and a positive copper bar and between the fixing screws and a negative copper bar.

Description

technical field [0001] The invention relates to the voltage electrical field, in particular to an insulating device for a frequency converter and an IGBT tube terminal. Background technique [0002] The IGBT module is a device composed of MOSFET and bipolar transistor. It not only has the advantages of small driving power and fast switching speed of MOSFET, but also has the advantages of low saturation voltage and large capacity of bipolar devices. It is widely used in modern power electronics. technology, especially in high and medium power applications at higher frequencies. [0003] In the prior art, the coordination device of the IGBT mainly plays the role of support, fixation and isolation, and has the following defects and deficiencies: [0004] 1. This matching device plays a supporting role and needs to be fixed with screws, which increases the material and assembly process; [0005] 2. This matching device has a support device fixing hole, which needs to be fixed ...

AI Technical Summary

Problems solved by technology

[0005] 2. This matching device has a support device fixing hole, which needs to be fixed on the base of the IGBT module, and needs to be fixed with screws, which increases materials and assembly processes and wastes time;

[0006] 3. There is still a hidden danger of insufficient creepage distance between the bolts, copper bars and terminals

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