HRI High Voltage, High Power DC Power Supply

  • High Voltage High Power DC Supply
  • local control panel
  • pc control panel
About This Project

At the request of Aurtas International, HRI designed, built and tested a large 175 KW (output) regulated DC power supply (Figs 1). This power supply was specifically designed to control a large plasma load. It can change from voltage to current control automatically thus enabling the operator to control and observe the plasma properties more accurately. The power supply can be equipped with an input auto transformer with remote input tap selection control. This feature allows the unit to better control the output voltage by varying the input 3 phase line to line voltage. The power supply is equipped with local (Fig 2) and remote (Fig 3) controls. The power supply uses a PC interface to set and monitor the voltage and current.

Figure 1. Power supply overview showing resistive balancing load in foreground.

Figure 2. Local Control Panel

Figure 3. PC Control Panel

The specifications of the power supply are:

Without auto transformer:

Input Voltage: 600 V 3 phase line-line (+/-10%)
Input Current: 225 A max
Input power factor: 0.3 – 0.9 (depending on output voltage operating point)
Output Voltage: 5000 VDC
Output Current: 35 ADC
Output Current Ripple: 200 mA P-P (simulated with 1500 V @ 20 A resistive load)
Regulation: Voltage or Current with automatic/selectable switchover

With auto transformer:

Input Voltage: 600 V 3 phase L-L to auto transformer
200 – 300 V 3 phase line-line from auto transformer to power supply
Auto transformer has remotely-selectable taps
Input Current: 225 A max
Input power factor: 0.3 – 0.9 (depending on output voltage operating point)
Output Voltage: 1650 (200 V tap) – 2500 (300 V tap) VDC
Output Current: 35 ADC
Output Current Ripple: ~30 mA P-P (simulated with 1500 V @ 20 A, resistive load, 200 V tap)
Regulation: Voltage or Current with automatic switchover

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