Monday, August 22, 2016

2KV High Voltage Power Supply Circuit with Low Current

Electronic Kit School. - Do you want to produce DC high voltage output power supply or called with but need low current now? Usually this this high voltage used in many application as like for biasing of gas-discharge tubes and radiation detectors etc.

Other application that this power supply can be used to give the protection of property by electric charging of fences. In this article we will give you one electronic circuit of high voltage power supply with low current result from 15V input to 2KV output voltage as like shown in Figure 1 below.  


Figure 1. 2KV High Voltage Power Supply Circuit with Low Current

Component Parts

  1. Transformer TR1
  2. Resistors
  3. Zener diode 9V
  4. Capacitors
  5. Diodes
  6. Transistor Q1 2N3700

Circuit like in Figure 1 above show you about the 2KV High Voltage Power Supply Circuit with Low Current that can give you converting from 15 VDC to 2KV as high voltage with low current. 

Maybe the main component that you should provide is transformer TR1 that consist of three parts are primary, secondary, and feed back. This transformer should be designed with certain turn like for primary part with 50 turn, secondary part with 1650 turn, and feed back part with 12 turn. You can build this transformer maybe with go to the specialist of transformer maker place.

In this circuit, the primary winding and the feedback winding of transformer TR1 are arranged such that a supporting oscillation is ensured once the supply is switched on. The waveform's duty cycle is asymmetrical, but it is not very important in this application. 

As noted for you that if the oscillations do not occur at the switch-on in time, maybe the transformer winding terminals of the feedback or the primary winding (but not both) should be reversed. In this condition, the primary oscillation amplitude more than 24V(p-p). This gets amplified with the large step-up ratio of the transformer and we get about 800V(p-p) across the secondary. 

A simple series voltage multiplier (known as Cockroft-Walton circuit) is used to boost up this voltage in steps to give a final DC of about 2 kV although it is not very well regulated. But if there is a constant load, the final voltage can be adjusted by varying the supply voltage.

The present configuration gives 2 kV for an input DC voltage of 15 V. Though higher voltages could be achieved by increasing input supply, one word of caution is necessary: that the component ratings have to be kept in mind. If the ratings are exceeded then there will be electrical discharges and breakdowns, which will damage the devices.


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