Variable DC power supplies are AC to DC power supplies with a variable DC output. The output can be varied with a Variable Transformer (also known as variac). The Variable Transformer can be adjusted manually or with a motorized control. The AC input power can be single phase or three phases. With single phase AC input, the DC output ripple is very high (50%). With three phase AC input, the DC output ripple is low (5%). This would be a key benefit for selecting three phase AC input instead of single phase.
The block diagram of the motorized variable transformer controlled power supply, part number 18534PS is shown below:
The photo of the variable DC power supply, part number 18534PS is shown below:
AC to DC Power Supply
Specifications:
- Motorized Variable Transformer Controlled Power Supply, P/N 18534PS
- Input: 460 VAC, 3 PH, 60 Hz
- Output: 0 to 250 VDC, 200 Amp max.
- Variable Transformer is used to vary the output. SCR controller is not used, as it generates harmonics.
- Input control is 0 to 3.6 VDC.
- Indoor enclosure: 50"H x 46"W x 36"D
- Output voltage and current feedback as 4/20 mA for PLC interface.
- All input/output connections are inside the enclosure
CEHCO is a motorized variable transformer power supply manufacturer. To discuss your specific needs, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.
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