What is Voltage multiplier: Definition and 20 Discussions

A voltage multiplier is an electrical circuit that converts AC electrical power from a lower voltage to a higher DC voltage, typically using a network of capacitors and diodes.
Voltage multipliers can be used to generate a few volts for electronic appliances, to millions of volts for purposes such as high-energy physics experiments and lightning safety testing. The most common type of voltage multiplier is the half-wave series multiplier, also called the Villard cascade (but actually invented by Heinrich Greinacher).

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  1. cheniour oussama

    Efficiency Analysis of a Voltage Multiplier Circuit

    hello, I did the simulation for the voltage multiplier in Vspace and I want to calculate the efficiency but the OUTPUT POWER is always negative. Do I need help? can I calculate the power losses of this sextupler voltage multiplier or it is very complicate to calculate it ?
  2. K

    Design of a CW multiplier circuit

    Im trying to design a circuit that switch from 220V AC to 2kV DC using 1 voltage source (without use of transformers). So CW (Cockcroft-Walton) seemed like a good design to do that. Looking at the equations of halfwave CW it looked to me that the optimal number of stages is set if you know the...
  3. D

    Question: Voltage Multiplier Safety

    I want to build a safe Villard cascade voltage multiplier so that I can create sparks that I can touch without dying or being injured. Is it possible to do this? And if so how would you construct it (specifically what capacitors and rectifiers and power source would be used)? My second question...
  4. M

    How does this voltage multiplier work?

    With ground where it is, how does current travel the rest of the circuit? I thought that as soon as current met ground it was gone
  5. A

    Understanding the Cockcroft Walton Generator: How Does it Work?

    Hi everyone. I am doing some research about Cockcroft Walton Accelerators, because I need to be able to explain them to others as a part of a project. However, in order to understand the Cockcroft Walton Accelerator, I need to be able to understand the Cockcroft Walton Generator first. I have...
  6. L

    2-stage voltage multiplier question

    Dear all, I'm doing an RF energy harvesting circuit in UHF band. My question is about the voltage multiplier. My 2-stage multiplier (using 2 HSMS-285C diodes) follows Karthaus-Fischer's voltage-doubler. A 0.1F supercapacitor is put right at the output of the multiplier. This DC voltage will...
  7. V

    Capacitance for Voltage Multiplier

    Can someone help me on how can I get the value of capacitor on voltage multiplier and how can i double the voltage through a 20 ohm load resistor?
  8. Hassan Raafat

    Voltage Multiplier: Why Don't Current Divide Between Diodes?

    in Voltage Tripler and Quadrupler , why don't current divide between two diodes ( D1 , D3 ) or ( D2 , D4 ) ? they are forward in the same cycle , right ? I understand that charging happens in a very little time , so two cycles already is not shown on oscilloscope but in BoyleStad is explained...
  9. C

    Selecting the correct power source for a Cockroft-Walton Multiplier

    Hello. I'm in the process of selecting materials for a voltage multiplier. I need to be able to vary a DC voltage source from 0-6kV, possibly with a regulated current up to 20mA...
  10. A

    Voltage Multiplier Circuit Design

    I have made a 3 stage voltage multiplier. My input is from the outlet so 120 V ac. I measure my output from the first and last capacitors of the bottom row as shown in the image. The output I am getting is 120 V dc. From the equation Vout(dc) = Vin(ac)*sqrt(2)*number of stages. With this...
  11. jegues

    Cockcroft-Walton Voltage Multiplier Problem

    Homework Statement Hello all, I am attempting to preform some analysis on the Cockcroft-Walton Voltage Multiplier circuit. Homework Equations The Attempt at a Solution I am using PSCAD to simulate the circuit, but the use of any other circuit simulator should provide the same...
  12. S

    Impact of Current loading for voltage multiplier

    Hi, Can you please let me the impact of current loading for the attached circuit? The attached circuit is a 4-stage dc-dc converter- charge pump. When I give an input voltage of 1V, the output voltage is around 4.6 V using cadence simulations. The expected output voltage is 5V. I am...
  13. C

    Capacitors in a multiphase voltage multiplier?

    what should be the ratio between the capacitance of the capacitors in the three AC lines , and that of the capacitors in the DC line at the bottom? should all the capacitors be the same value ... even though there are AC lines, with an identical capacitor in each of them, the total 'linear'...
  14. L

    What Is the Maximum Output Voltage of a Custom Voltage Multiplier Circuit?

    Homework Statement You have two 120VAC:24VAC transformers, 16 high voltage capacitors and 10 high voltage diodes. Design, on paper, a circuit that maximizes output voltage. What is the maximum voltage of your circuit? Homework Equations The Attempt at a Solution So my textbook...
  15. F

    Cockroft Walton Voltage Multiplier Problems

    Hey everyone. So I like to have electronics projects going on to keep me on my toes during the academic year and my project I chose for fall ended up being a Cockroft Walton Generator. Basically, I was just looking to make a simple negative ion generator from it. I finally got the parts in...
  16. K

    If I attached a self-made voltage multiplier to batteries + mechanical commutator

    I saw the following video: Lecture Series on Electronics For Analog Signal Processing I by Prof.K.Radhakrishna Rao, Department of Electrical Engineering,IIT Madras. For more details on NPTEL visit http://nptel.iitm.ac.in Category: Education Tags: Voltage Multiplier So I was wondering...
  17. R

    Voltage multiplier and spark gap design

    Hi, I am currently working on high voltage system, where I need to create an impluse at the primary side of a potential transformer. I am trying to charge my circuit to at least 10kV using a half wave series voltage mutliper consisting of capacitors and diodes, and discharging them through...
  18. S

    Circuit to digitally control a voltage multiplier

    Does anyone know of a circuit that will digitally control a voltage multiplier circuit. i believed it to be a DAC but this is incorrect. Does anyone have any ideas?
  19. S

    Understanding Vout Waveform and Voltage Ripple in Voltage Multiplier Circuits

    I am trying to simulate a voltage multiplier circuit on Pspice simulation package, which will produce an output voltage Vout. What is the waveform of Vout supposed to look like? And also how will i work out the voltage ripple of the waveform?
  20. T

    Voltage Multiplier: Increasing 1.5V to 5V

    I was wondering if anyone know how to take the circuit from a throw away camera and make it increase the voltage in a 1.5V battery. I'm building a car right now and as u probably know 1.5V isn't enough to run it and I'm trying to get it too at least 5v.