HIGH VOLTAGE DC BY
MARX GENERATOR
PRINCIPLES
The project is designed
to generate high voltage DC using Marx generator principle by using MOSFET and
capacitor stacks. The Marx Principle was developed by Erwin Otto Marx. Its
principle is to generate a high voltage pulse using a number of capacitors in
parallel to charge up during the on time and then connected in series to develop
higher voltage during the off period. This principle is used to generate
voltages in the range of KV’s in real-time for testing the insulation of the
electronic appliances like transformers and the insulation of the power
carrying lines.
This demo project
consists of 4 stages and each stage is made of one MOSFET, two diodes, and one
capacitor. MOSFET is used as a switch; diodes are used to charge the capacitor
at each stage without power loss. A 555 timer generates pulses for the
capacitors to charge in parallel during ON time. During OFF tine of the pulses
the capacitors are brought in series with the help of MOSFET switches. Finally,
number of capacitors used in series (4 in our project) adds up the voltage to
approximately 3 (4 capacitors-1 capacitor) times the supply voltage. This
system structure gives compactness and easiness to implement the total system
from a DC supply of 12V to get approximately (30V-36V)
This concept in future
can be extended to Generate High voltages (KV) using more number of capacitors.
This technique is adopted for insulation testing of the electronic components,
wires, gadgets etc.
BLOCK DIAGRAM:
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