Solid-State High-Frequency High-Voltage Nanosecond Pulse Generator

Project Title

Solid-State High-Frequency High-Voltage Nanosecond Pulse Generator

Project Area of Specialization Electrical/Electronic EngineeringProject Summary

Pulsed power (voltage) is a technology of accumulating energy for longer period of time and releasing it very quickly into the load. Thus the output is a pulsed output. Repetitive high-voltage pulse generators have found extensive use in food sterilization, wastewater processing and medical applications. With the increasingly extensive and in-depth applications of all solid-state high-voltage nanosecond pulse generators in the defence and industrial fields, the development of traditional pulse generators faces many key issues, such as high-voltage drive isolation, compact design, and reduced weight. However, nanosecond pulse generators based on traditional devices, such as spark gap switching and magnetic switching, can no longer meet the demand. Therefore, the development of a nanosecond pulse generator with a higher voltage amplitude (?tens of kV or even higher), smaller volume, lower weight, and more stable square waveform with a full width at tens of nanoseconds to hundreds of nanoseconds and high repetition frequency (0–10 kHz or even higher) is of great significance.

A Marx generator is a well-known type of electrical circuit first described by Erwin Otto Marx in 1924. High voltage pulse is obtained from a low voltage DC input supply. The conventional Marx generator uses passive power components such as inductor or resistor to charge the capacitors and also it uses spark gap switches to connect the capacitor in series while discharging. The conventional Marx generator has certain limitations such as increased cost, size, power losses and limited frequency operation.

Hence, a novel circuit topology for a self-triggered high-frequency high-voltage nanosecond pulse generator is proposed. Through high potential energy-gaining technology of the inter-stage capacitance, this generator does not need a complicated MOSFET isolation drive circuit, and there are also no switching dynamic and static voltage equalization problems. This kind of generator is very suitable for compact assembly with only a single external gate driver. High voltage output can be achieved by using multiple stages according to actual needs. At the same time, the generator has a high repetition rate and long life. 

In this project we'll design a pulse genrator with an output voltage of ~15kV at high frequency ~1-10kHz.

Project Objectives

The objectives of this project are to:

1. Propose High-frequency high-voltage pulse generator

1. Design, implement and evaluate the proposed system by simulation and experimental work

Project Implementation Method

We'll implement this project by using Marx Circuit with MOSFETs as high switching rate device. All the stages MOSFETs will be driven internally except the last stage that will be driven internally. 

Benefits of the Project

We'll get a light weight , durable, High voltage and high frequency pulse genrator. This model will be cheaper than the previous models because we dont need to use seperate drive circuits for each stage.

Technical Details of Final Deliverable

The final hardware form of this project will provide high voltage pulsating output of >15kV at high frequncy ranging in 1-10 kHz.

Final Deliverable of the Project Hardware SystemCore Industry Energy Other IndustriesCore Technology OthersOther TechnologiesSustainable Development Goals Industry, Innovation and Infrastructure, Partnerships to achieve the GoalRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	104200
MOSFET	Equipment	20	1100	22000
Diode	Equipment	40	500	20000
Capacitor	Equipment	40	150	6000
Resistor	Equipment	2	50	100
Petrol	Miscellaneous	20	150	3000
PCB Printing	Miscellaneous	1	1000	1000
MOSFET	Equipment	20	1100	22000
Diode	Equipment	40	500	20000
Capacitor	Equipment	40	150	6000
Resistor	Equipment	2	50	100
Petrol	Miscellaneous	20	150	3000
PCB Printing	Miscellaneous	1	1000	1000