Protective device of single IGBT and power module provided with single IGBT

Abstract

The invention discloses a protective device of a single IGBT. The protective device of the single IGBT comprises an insulation protective shell, one or more first installation grooves are formed inside the protective shell; each first installation groove is internally provided with an insulation partition portion; each insulation partition portion comprises a first partition way, a second partition way and a third partition way which are arranged in parallel; the distance between each first partition way and the corresponding second partition way and the distance between each second partition way and the corresponding third partition way are 2-4 mm; each first installation groove is internally provided with three through holes which are formed inside the first partition way, the second partition way and the third partition way of the corresponding partition portion respectively. In this way, even though voltage between any two pins of the single IGBT reaches 500-700 V or under the humid or dust environment, the pins are spaced through the insulation partition ways, the defect that the creepage distance between the pins is not sufficient is overcome, the arc discharge or short-circuit phenomenon between the pins is avoided, the process that the pins are coated with insulation varnish is omitted, the product quality is improved, and working efficiency is improved.

Description

technical field [0001] The invention relates to a protection device for a single-tube IGBT. Background technique [0002] IGBT (Insulated Gate Bipolar Transistor), with its remarkable characteristics of fast switching speed and high rated current of a single tube, is widely used in various power supply equipment such as inverter power supply, frequency conversion speed regulation, induction heating and so on. For a long time, IGBTs have been widely used in the form of modules (that is, multiple dies packaged in one shell). Since the package of the module is fully sealed, it is suitable for harsh environments, such as humidity, dust, high pressure, salt spray, etc. The ability to adapt is very strong. However, the packaging cost of the module is very high. In recent years, single-tube IGBTs with low packaging costs have been widely used in inverter equipment. [0003] Although the single-tube IGBT can be turned on and off quickly under high voltage, high current, and high f...

AI Technical Summary

Problems solved by technology

[0004] The working efficiency is low. A piece of equipment often requires multiple single-tube IGBTs to be used in parallel. However, the coating of insulating silicone on the single-tube IGBT is often done manually. The manual coating of insulating silicone is extremely inefficient.

Moreover, it is difficult to ensure the consistency of insulating silicone coating, and the effect of different operators on coating silicone is different, so it is difficult to guarantee the high quality of products

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