High-voltage pulse power supply controlled by 555 timer

Abstract

The invention discloses a high-voltage pulse power supply controlled by a 555 timer. Positive electrodes of a high-voltage direct current power supply are connected with 64 insulated gate bipolar transistor (IGBT) circuits in series connection. The 64 IGBT circuits which are in series connection are connected with one ends of loads. The other ends of the loads are connected to negative electrodes of the high-voltage direct current power supply. Pulse signals output by circuits of the 555 timer are connected with 16 IGBT drive circuits after passing through a pulse-width modulation (PWM) amplifying circuit. Each IGBT drive circuit drives 4 IGBTs which are in series connection. The 16 IGBT drive circuits are connected with output ends of the circuits of the 555 timer after passing through 64 fault detection circuits and fault feedback circuits. By utilizing pulse signals output by the circuits of the 555 timer to control on-off of the IGBTs, about 40kV high-voltage pulses adjustable in both frequency and duty ratio can be output.

Description

technical field [0001] The invention relates to a high-voltage pulse power supply, in particular to a high-voltage pulse power supply controlled by a 555 timer. Background technique [0002] In the food industry, the preservation of various liquid foods is a difficult problem that plagues the development of the industry. Among them, the sterilization of dairy products with high protein content is the most serious, such as soybean milk, milk, yogurt, etc. Using the traditional pasteurization method, the conditions are mild but the sterilization is not complete, and it will damage the flavor and nutrition of the food. [0003] The pulsed electric field sterilization technology is to pump the liquid material to be sterilized through the processor equipped with a high-intensity pulsed electric field. After the microorganisms are subjected to the strong electric field force in a very short period of time, the bacterial structure is destroyed and the bacteria die. This techno...

AI Technical Summary

Problems solved by technology

However, in the application of pulse power technology with a voltage as high as thousands to tens of kilovolts, even the 6500V IGBT with the highest voltage level cannot meet the requirements. Therefore, it is necessary to connect the IGBTs in series to meet the needs of different high-voltage equipment.

Images