Electroplating power supply

[Ramana Madishetti]

Hello every one,

please i need a best suggestions from you.
I need to prepare adjustable voltage and current for electroplating.

And also please suggest me how can i sense the high voltage at the output.
I need to sense a high dc voltage after completion of electroplating and the voltage is given as interrupt to the micro-controller.

Please also view the attachment for electroplating where i found in one of the thread.
Some one please explain about that circuit.

 

[KlausST]

Hi,

pleas give specifications in numbers and units.

Voltage, current frequency and all ather related values.


Klaus

 

[Ramana Madishetti]

Dear klausST,

Thank you for your response.

Specifications:

Input will be 230 VAC 50 Hz.

CURRENT: precise 1mA to 1 Amp
VOLTAGE: 0-24v

And also please suggest, after completion of electroplating etching there will be a sudden high voltage change.
So i need to sense the sudden voltage change and it will be an interrupt to controller.
Suggest some circuits to sense the voltage.

Thanks & Regards.

 

[KlausST]

Hi,

define "precise"
define "sudden high voltage change"

Why don´t you modify the given circuit for 24V and 1A? What´s wrong with that?

Use DAC or low pass filtered PWM for voltage/current setup.

Regulating pure DC with low ripple is somehow difficult. Please decide if it is possible to use a controlled SCR rectifier.

Your circuit shows linear regulation. This is very lossy, much heat to dissipate with a big heatsink.
Have a look for SMPS, they can deliver the power with high efficiency and voltage ripple of some 10mV.

Suggest some circuits to sense the voltage.

for DC with negligible ripple: Resistive voltage divider with capacitor for low pass filtering. ucontroller internal or external ADC.

For controlled rectified sine or DC with a lot of ripple you need to decide if you need average current or RMS current.

Klaus