Multi-channel isolated power device switch driver module for power conversion controller

Abstract

The invention provides a multi-channel isolated power device switch drive module of a power conversion controller, the signal input end of the low-frequency full-bridge rectification filter circuit is connected to the AC power supply of the grid-connected power generation network, and the signal output end is connected to the high-voltage high-frequency pulse power The signal input terminal of the signal generating circuit, the signal output terminal of the high-voltage high-frequency pulse power signal generating circuit is connected to the signal input terminal of the isolated DC level power supply circuit, and the signal output terminal of the isolated DC level power supply circuit is connected to the signal of the pulse level shifting circuit The input terminal and the signal pulse sent by the power conversion controller are also connected to the signal input terminal of the pulse level shifting circuit. The invention has simple structure, stable and reliable performance, and can provide good drive for the power conversion controller. The invention is suitable for various composite applications in half-bridge, full-bridge, three-phase bridge, multi-level topological circuit and power management circuit in frequency conversion speed regulation.

Description

technical field [0001] The invention belongs to the field of power electronics, in particular to high-frequency inverter, frequency conversion speed regulation, power management and solar grid-connected power generation system, in particular to a multi-channel isolated power device switch drive module of a power conversion controller. Background technique [0002] Energy conservation, emission reduction and environmental protection are the most severe challenges facing human society today. With the continuous consumption of energy, the reserves of non-renewable energy on the earth are getting less and less. At the same time, the environmental pollution caused by the use of traditional energy is becoming more and more is becoming more and more serious, so the research and development of pollution-free energy is imperative. In recent years, wind energy and solar energy, which are non-polluting energy sources, have been increasingly sought after by people. They use naturally oc...

AI Technical Summary

Problems solved by technology

The commonly used one in the prior art is the Z-source conversion controller. During its application, the gate of the power transistor needs to be driven by the PWM signal generated by DSP or other chips, but the PWM signal generated by DSP and other chips cannot directly drive the gate of the power transistor. Therefore, it is necessary to add a drive between the output terminal of the DSP chip and the gate of the power tube, and the existing drive is clamped by a capacitor or a diode to ensure reliable turn-on and turn-off of the power tube, such as MOSFET, IGBT MOS-like power tubes are important devices used in power conversion and management. Their entire drive module is integrated in a monolithic thick-film integrated circuit. In actual use, MOSFET and IGBT-like MOS-type power tubes are often due to The drive integrated circuit sends out wrong control signals and causes it to burn out, especially the drive integrated circuit and the IGBT are integrated on a circuit board in a small space, which makes the electromagnetic interference very serious, and the pulse signal used to control the IGBT often has errors, thus Burning of the IGBT or short circuit of the circuit, and the failure can only be solved by replacing the IGBT or integrated circuit. It can be seen that the drive of the power tube in the prior art has a large footprint, a large number of components, high circuit cost, and reliability. Inferior disadvantages

[0004] In addition, in the case of large and medium power, the du / dt and di / dt of the switch tube being turned on and off are very high, and a large interference signal will be generated when the control and drive circuit are not well shielded. Turning off the drive will cause high-voltage glitches on the DC bus, which can easily cause interference to weak electrical signals such as control circuits, and may cause the drive module to fail and burn out the IGBT module, seriously threatening the safe operation of the power inverter

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