Bidirectional constant power 15kW supply

December 01, 2017 // By Nick Flaherty
Delta Elektronika in Holland has extended its power supplies from a maximum of 6kW per supply to 15kW with bidirectional power. 

The bi-irectional constant output power of the SM500-CP-90 covers the output range of five separate power supplies with a traditional rectangular VI-curve. Choosing the best output range is much easier now and offers users far better value for money.

Bi-directional power means the same constant power characteristic in the second quadrant for the full 15kW. It also operates like an electronic load - previously Delta’s power supplies would be equipped with an optional power sink capable of absorbing up to 10% of the total energy which was dissipated via internal heat sinks. Now, the power sink is standard and can sink up to 100% of the power without the need for dissipating energy.

The new Power Recovery [Regeneration] technology returns full power back into the grid and the efficiency of 95% avoids the need for expensive water cooling. Compared to traditional electronic loads – where dissipation is 100% – there is a power loss of just 5%. 

Fast response to load changes has been a challenge for a long time, especially when it comes to changing from positive to negative current and vice versa. Previously, for applications requiring source and sink devices, several solutions were offered such as pre-loads. Now the output voltage of a SM500-CP-90 recovers in 200µs after a load change from +90 to -90A and -90 to +90A.

The supply also includes an Ethernet interface, built-in sequencer, digital control to adapt regulation to match load type and fine tune settings.

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