High-power IGBT driving adaptive closed-loop control method and system

Abstract

The invention discloses a high-power IGBT driving adaptive closed-loop control method and system, and the method comprises the steps: collecting and processing the voltage and current outputted by an IGBT power module, so as to generate a first feedback signal; collecting and processing CE pole voltage of the IGBT power module to generate a second feedback signal; all feedback signals including the first feedback signal and the second feedback signal are comprehensively processed so as to selectively send a corresponding first modulation driving signal or second modulation driving signal to the IGBT driving module, the first modulation driving signal includes a PWM wave in a current state or a PWM wave with adjusted rising and falling edge time, and the second modulation driving signal includes a PWM wave in a current state or a PWM wave with adjusted rising and falling edge time. The second modulation driving signal comprises a PFM wave; according to the control method, the safety and the service life cycle of the IGBT power module can be effectively improved, the IGBT power module can adapt to more application scenes, the utilization rate of the IGBT power module is further improved, the equipment manufacturing cost is reduced, the hardware structure is simpler, and the adaptability to different scenes is higher.

Description

technical field [0001] The invention relates to the technical field of high-power IGBT drive control, in particular to an adaptive closed-loop control method and system for high-power IGBT drive. Background technique [0002] Inverter is a key device for electric energy conversion, especially in the preparation of clean energy, it is necessary to use high-power inverters to convert other forms of energy such as wind energy, solar energy, etc. into electric energy. The application of the IGBT power module, the key device in the inverter, is an important factor to test the stability of equipment performance. [0003] The work of the IGBT power module needs to be controlled by the IGBT drive module, so as to improve the working stability and efficiency of the IGBT power module. However, the existing IGBT driving waveform control strategies generally have the following shortcomings: [0004] 1. Most of the existing inverters only use PI loop control such as voltage and current...

AI Technical Summary

Problems solved by technology

[0004] 1. Most of the existing inverters only use PI loop control such as voltage and current to adjust the driving waveform of IGBT devices, and the loop reference factor is single, which cannot further release the use space of IGBT devices;

[0005] 2. At present, the driving waveform of the IGBT in the inverter is multi-sampled pulse width modulation (PWM) or pulse frequency modulation (PFM), and the adjustment method is fixed, which limits the efficiency of IGBT devices;

[0006] 3. At present, the driving waveform of IGBT mostly adopts the method of hierarchical switching to adjust the rising and falling edges of the driving waveform, and the driving circuit is complex or poorly adaptable.

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