Diode Voltage Multiplier Circuit

Voltage multiplier circuit (230v ac - 1000v dc)?

Hi, I was wondering how to make a 1000v power supply (in the milliamps) using mains electricity (UK - 230v) and readily available components. I'm wanting to run a high voltage DC motor.

I've looked up multiplier circuits, and transformers, but current/load tends to confuse me.

It's been a while since I've studied electronics (as you can tell!)...so preferably I'd like to not die in the process of building this

Any advice for component ratings etc, simple diagrams? I understand how the circuit is built, just not familiar with component ratings. I guess I would need a step up transformer between the supply and capacitor/diode circuit to make it safer? Any clue as to number of primary and secondary turns?

The usual diode/capacitor 'villiard cascade' circuit will not maintain its output voltage under a load, unless really big caps are used (if this is for 1000 volts , that'll be expensive and dangerous!).

The absolute cheapest method would be to take the mains high voltage transformer from an old microwave oven, followed by a fullwave rectifier and a filter capacitor. These transformers are typically in the range of anywhere from 1000 volts to 2500 volts. They usually have 3 windings, the 240 volt primary, the high voltage secondary, and an additional low voltage winding of about 2 to 5 volts. You can ignore this winding, it is there to heat the fillament of the magnetron (microwave tube). Microwave ovens also have a high voltage diode and capacitor, you could collect multiple diodes and make a full wave rectifier. In any case, high voltage silicon diodes are fairly cheap, you could series a number of lower voltage diodes to make a high voltage diode. The HV cap in the microwave is usually 1-2 uF, you could use this as a filter capacitor for your DC supply, at 1mA, a 1 uf cap will give you a nice and small 10v ripple. Be very careful of the high voltage capacitor: when you open the microwave oven, it may still have some residule charge! not enough to kill, but enough to be very painful. In your circuit, it would be wise to put a large value resistor across your HV cap, so that when you remove power, it will be discharged. 1 megaohm would be sufficient. Be sure the resistor can withstand the full voltage though: normal 1/4 watt resistors will simply flashover at about 1kv, 2w resistors can put up with a bit more voltage, but two in series would probably be better. Also, be careful of the transformer, most microwave transformers have one side of their HV winding connected to the core, so be aware of this. It would be safest to leave this floating, and NOT ground the core. But dont rely on this to protect you from a shock! the insulation between the mains winding (the 240v primary) and the HV winding is not meant to see the full high voltage (since in the microwave oven the core is bolted to the case, which is connected to mains ground.) Do not touch the circuit while it is running, and leave it floating and you will be fine, however.
A power supply buit like this cannot be short circuited, (the cap will discharge into the short circuit and blow something up, also the transformer wont like being shorted for more than a few seconds! Microwave oven transformers have a very large leakage inductance, so they tend to limit short circuit current quite well, but still get rather, uhh...warm to say the least.!), so ensure that this cannot happen! A fuse and breaker on the mains side is of course required as well. Microwave oven transformers have a high leakage inductance, and tend to draw lots of magnetising current, of the order of amps, so size your fuse accordingly.... any questions email me, I have built numerous HV supplys with these transformers...

Voltage Multiplier $68.51 High Quality Content by WIKIPEDIA articles A voltage multiplier is an electrical circuit that converts AC electrical power from a lower voltage to a higher DC voltage by means of capacitors and diodes combined into a network. Voltage multipliers can be used to generate bias voltages of a few volts or tens of volts or millions of volts for purposes such as highenergy physics experiments and lightning safety testing. The most common type of voltage multiplier is the halfwave series multiplier, also called the Villard cascade (but actually invented by Heinrich Greinacher). Such a circuit is shown opposite. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 92 Publication Date: 2010/07/14 Language: English Dimensions: 6.00 x 9.02 x 0.22 inches

Voltage Doubler $54.86 High Quality Content by WIKIPEDIA articles A voltage doubler is an electric circuit with an AC input and a DC output of roughly twice the peak input voltage. They are a variety of voltage multiplier circuit and are often, but not always, a single stage of a general form of such circuits. The term is usually applied to circuits consisting of rectifying diodes and capacitors only, other means of doubling voltages are not included.The Villard circuit consists simply of a capacitor and a diode. While it has the great benefit of simplicity, its output has very poor ripple characteristics. Essentially, the circuit is a diode clamp circuit. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 68 Publication Date: 2010/07/14 Language: English Dimensions: 6.00 x 9.00 x 0.16 inches

Sea Gull Lighting 1232AT-71 Antique Bronze Traditional / Classic Low Voltage 4 Multiplier Mini-Recessed Trim 1232AT $16.11 Low Voltage 4" Multiplier Mini-Recessed TrimDetails:Title 24

Sea Gull Lighting 1232AT-849 Satin Nickel Traditional / Classic Low Voltage 4 Multiplier Mini-Recessed Trim 1232AT $16.11 Low Voltage 4" Multiplier Mini-Recessed TrimDetails:Title 24

Sea Gull Lighting 1232AT-14 White Traditional / Classic Low Voltage 4 Multiplier Mini-Recessed Trim 1232AT $16.11 Low Voltage 4" Multiplier Mini-Recessed TrimDetails:Title 24

Sea Gull Lighting 1232AT-172 White / Antique Bronze Traditional / Classic Low Voltage 4 Multiplier Mini-Recessed Trim 1232AT $16.11 Low Voltage 4" Multiplier Mini-Recessed TrimDetails:Title 24

Sea Gull Lighting 1232AT-22 White / Polished Aluminum Traditional / Classic Low Voltage 4 Multiplier Mini-Recessed Trim 1232AT $15.66 Low Voltage 4" Multiplier Mini-Recessed TrimDetails:Title 24

Sea Gull Lighting 1232AT-861 Satin Nickel / White Traditional / Classic Low Voltage 4 Multiplier Mini-Recessed Trim 1232AT $16.11 Low Voltage 4" Multiplier Mini-Recessed TrimDetails:Title 24

Accell D080B-007K-R PowerSquid Outlet Multiplier $17 Type: Outlet Multiplier Features: 5 - 100% transformer block compatible outlets 3 foot - 14-gauge poer cord Recessed yellow-LED power indicator 15 Amp circuit breaker provides safety Rugged, drop-tested ABS casing Safety tested to UL 1363 standard

LightEmitting Diode $68.51 Light emitting diode. Oleg Losev, List of LED failure modes, Organic light emitting diode, Miniature light emitting diode, Solid state lighting, LED lamp, LED power sources, Electrical polarity of LEDs, LED circuit, LED as light sensor Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 74 Publication Date: 2009/10/08 Language: English Dimensions: 5.98 x 9.01 x 0.17 inches

High & Low Voltage Circuit Tester $8.49 The High & Low Voltage Circuit Tester tests high voltage in spark plugs, plug wires, and distributor caps. Test 6 and 12 volt systems for shorts, grounds and open circuits with power on. Tester bulbs are replacable.

Accell Powersquid 5Outlet Multiplier $31.8 3 14gauge power cord. Recessed yellow LED power indicator. 15A circuit breaker for safety. Rugged ABS casing. Meets UL 1363 safety standards. Wall mountable

Transmission Lines and Schottky Diode $108.33 A nonlinear relation between current and voltage for schottky resonant tunneling diode is used. A general form of equation similar to VanDer Pol equation is obtained. A Resonant tunneling diode(RTD) has a negative differential resistance that means when the voltage increases the current decreases. This property is very useful for oscillators manufacture. Nonlinear transmission lines is considered to show that it canbe used in oscillators and to show that it can reshape the sinusoidal signals to othershapes by using OrCad and mathematica programming. Author: ElKhozondar, Hala J./ ElKhozondar, Rifa J./ Abo Ireban, Ibtisam Binding Type: Paperback Number of Pages: 80 Publication Date: 2011/07/12 Language: English Dimensions: 9.02 x 5.98 x 0.19 inches

High/Mixed-voltage Analog and Rf Circuit Techniques for Nanoscale Cmos (Hardcover) $259.42 This book presents high-/mixed-voltage analog and radio frequency (RF) circuit techniques for developing low-cost multistandard wireless receivers in nm-length CMOS processes. Key benefits of high-/mixed-voltage RF and analog CMOS circuits are explained, state-of-the-art examples are studied, and circuit solutions before and after voltage-conscious design are compared. Three real design examples are included, which demonstrate the feasibility of high-/mixed-voltage circuit techniques. Provides a valuable summary and real case studies of the state-of-the-art in high-/mixed-voltage circuits and systems; Includes novel high-/mixed-voltage analog and RF circuit techniques ? from concept to practice; Describes the first high-voltage-enabled mobile-TVRF front-end in 90nm CMOS and the first mixed-voltage full-band mobile-TV Receiver in 65nm CMOS;Demonstrates the feasibility of high-/mixed-voltage circuit techniques with real design examples.

Circuit $11.49 Circuit

Phantom Circuit $70.1 High Quality Content by WIKIPEDIA articles A phantom group is composed of three circuits that are derived from two singlechannel circuits to form a phantom circuit. Here the phantom circuit is a third circuit derived from two suitably arranged pairs of wires, called side circuits, with each pair of wires being a circuit in itself and at the same time acting as one conductor of the third circuit. The side circuits within phantom circuits can be coupled to their respective voltage drops by centertapped transformers, usually called repeating coils. The center taps are on the line side of the side circuits. Current from the phantom circuit is split evenly by the center taps. This cancels crosstalk from the phantom circuit to the side circuits. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 80 Publication Date: 2010/07/25 Language: English Dimensions: 6.00 x 9.02 x 0.19 inches

Multi-Voltage CMOS Circuit Design $126.75 No Synopsis Available

K-D Low-Voltage Circuit Tester $8.95 Circuit tester for 6 and 12V electrical systems is ideal for the home mechanic. It quickly checks headlight, taillight and turn signal circuits, faulty sockets, connections, fuses and broken wires. Tester comes in a tough, durable shock-resistant case. Includes 12V bulb and 36'' cable. Uses bulb #1893.

Account limit of 2098 requests per hour exceeded.

Autocoil with voltage doubler

OK Voltage multiplier for a 2000 volt charging circuit?

What size caps and diodes should I use? thanks?

Depends on your starting AC voltage. If you have 300 volts AC RMS, that is 440 volts peak. You should use 1000 volt PIV diodes, and 450 or 500 volt caps.

The value of the caps and current rating of the diodes depends on how much current you are drawing. 10µF should work, with 1N4007 diodes, but larger caps will speed up the charge.

with that voltage (300) you will get
440 volts, HW rectifier
880 volts doubler
1320 volts tripler
1760 volts x5
2200 volts x6
with some losses for diode drops etc.
etc.

.