Driving circuit of high-voltage frequency converter

Abstract

The invention discloses a driving circuit of a high-voltage frequency converter, and the circuit is simple and convenient, has low cost and simultaneously can greatly save energy consumption. The high-voltage frequency converter in the invention comprises a PWM signal incoming end, a triode T1, a base resister R1 of the triode T1, a collector resister R2 of the triode T1, a driving chip, a cascading resister R3 at the output side and a driving end light fiber head HFBR-1521. The invention is characterized in that the driving chip is a push-pull circuit composed of an NPN tube and a PNP tube connected in series; the base electrodes of the NPN tube and the PNP tube are connected to the end at which the collector electrodes of the resister R2 and the triode T1 are connected; the collector electrode of the NPN tube is connected to the other end of the resister R2 and to the power VCC; and the collector electrode of the PNP tube is connected to the emitting electrode of the triode T1 and to the ground.

Description

technical field [0001] The invention relates to a circuit, more specifically to a high-voltage frequency converter driving circuit, belonging to the field of power electronics. Background technique [0002] With the development of power electronics technology, the power of IGBT modules is getting bigger and bigger, the DC voltage is getting higher and higher, and the operating frequency is getting higher and higher, which brings about the problem of mutual interference between driving signals. During the drive transmission, the high-frequency current in the frequency converter interferes with the drive signal, causing problems such as distortion and delay. In order to avoid these problems, engineers have adopted many methods but have not achieved good results until the optical fiber technology is used. In the drive field, the interference problem was fundamentally solved, and it was widely used soon. The optical fiber driver needs a special driver chip, which is more expens...

AI Technical Summary

Problems solved by technology

But in general, no matter whether the fiber optic head is working or not, the circuit will have energy dissipation, which is very unreasonable

Moreover, the power consumption of the optical fiber head is greater when it is not working. From this aspect, it is extremely wasteful of energy, and the requirements for power supply are also increased. In addition, high energy consumption will also affect the life of the device. Therefore, it is necessary to develop a Simpler, cheaper and energy-free high-voltage inverter drive circuit

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