Pulse transformer for driving isolated gate double-base transistor

Abstract

The pulse transformer for a driving an isolated gate double-base transistor in the invention changes layering and grouping coiling into mixing layer coiling, thus strengthening and deepening coupling degree, so that the parameters and functions such as impedance, inductance, coupling degree, waveform and the like of various secondary levels and windings are basically consistent, thus providing identical driving waveform and conditions for a bridge arm which needs to open and close simultaneously in the working process of IGBT, improving the working reliability of IGBT, reducing noise wave and spike, improving efficiency and reducing loss. The adoption of high-temperature lead can satisfy high-standard requirements, and the selection of a can-shaped magnetic core ensures excellent shielding effect and improves performance index of electromagnetic compatibility of the pulse transformer. Summarizing all the advantages, the IGBT driving transformer is an ideal transformer for driving IGBT.

Description

technical field [0001] The present invention relates to transformers, in particular to pulse transformers for driving insulated gate double base transistors. Background technique [0002] IGBT (Insulated Gate Double Base Transistor) is a new type of electric power device, which is widely used in switching power supply, frequency conversion power supply, inverter power supply, and inverter welding machine as a high-frequency and high-power switching device. Since IGBT is a voltage-type Control devices have high input impedance, large inter-electrode capacitance, high threshold voltage, and strict requirements for turn-on waveforms. Therefore, the requirements for driving are very high, and the driving performance directly affects IGBT. A series of issues such as work safety, reliability, power consumption, and efficiency. In general, there are two main ways to drive the IGBT, one is electronic optocoupler drive; the other is transformer drive. Since the electronic component...

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Problems solved by technology

Due to the alternating magnetic field when the transformer is working, it is easy to generate electromagnetic interference and be interfered. In addition, the hierarchical relationship between the primary and secondary windings of the transformer is also difficult to deal with, resulting in differences in performance and waveforms between several groups of driving windings. The inconsistency of driving performance and waveform is very unfavorable to the working state of IGBT, and it will increase the power consumption of IGBT and damage IGBT. In addition, the dielectric strength and creepage distance between windings and between layers It is also difficult to meet the high standard requirements, so there are many deficiencies

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