For designing 50v,100v,150v dc power supplies.

How to design 50v,100v,150v power supplies?I need to use these power supplies for an actuator(Piezo stack actuator).

Can any body help me with the design equations for the above mentioned power supplies along with their circuit diagrams and necessary materials or notes for designing the power supply?

One critical requirement that's missing is the current. The required accuracy isn't mentioned. I also have to assume that the power source is 120VAC, not 240VAC.

Admittedly I'm ignorant of what a Piezo Stack Actuator is and too lazy to try and figure out what it would require. Being Piezo I would assume that it draws little current but as an actuator it must draw enough to have the power to actuate something.

If it draws a VERY small current then a bridge rectifier, resistor divider and zener diodes would work.

I think we can design these dc power supplies using a transformer,a bridge rectifier and a capacitor.

But what should be the different voltage and current ratings of the transformer for designing the 50v,100v,150v dc power supplies?

What should be the value and voltage rating of the capacitor?

Can u help me by providing either the circuit diagrams of the power supply design using the transformer,bridge and capacitor for the 3 different dc power supplies of 50v,100v and 150v or by providing the links for getting the necessary materials,diagrams,equations for designing the 3 dc power supplies of 50v,100v and 150v.

The person has left out all critical information.

You cans simplify the requirement if you design with a credit card. Go to a distributor, give them your CC and tell them what you need. They will gladly take your order and supply you I am sure.

I, too, don't know what a "Piezo stack actuator" is (and am also too lazy/busy) to look it up. But "Piezo" implies low current, so perhaps voltage multiplier circuits are for you ;)

* http://en.wikipedia.org/wiki/Voltage_multiplier
* http://www.allaboutcircuits.com/vol_3/chpt_3/8.html

Especially if this needs to be battery powered. Or perhaps a switch mode boost supply (in concert with a multiplier, perhaps)?

Or, if powered from mains, then what Stephen said...

Perhaps you can use this:

* http://www.analog.com/en/digital-to-analog-co...s/da-converters/ad5535b/products/product.html

without knowing the input voltage I'm just talking out the top of my hat. If the current is low and the input is 120VAC:

A bridge rectifier and capacitor produces about 170V. A common 7805 rectifier with a 145v zener (or combination of zener diodes in series) will output 150v and the drop across the 7805 will be about 20v, which is will within it's design specs.

Then if the current is very low three resistors in series to ground will give you 100v and 50v where they connect. For the output voltage to be stable the current through the resistors has to be much higher than the current out. The problem is that with a high voltage drop even a small current means high wattage resistors, so this is a very limited design.

If the current is much you'll need quite a supply. Most power supply components are designed for power supplies of 24V or lower. I'm too lazy to spend any time on a schematic, especially when I don't know the input voltage or output current requirements, both of which are critical.

I'd look for schematics on the net - that's always a good place to start. Some displays, such as VFDs (Vacuum Fluorescent Displays, not Variable Frequency Drives) have a high voltage bias so you could look there.