Bidirectional power supply simplifies EV powertrain testing

The new Chroma 62000D series of bidirectional DC power supplies from MDL Technologies has been introduced for high current testing of electric vehicle powertrain components. The series provides two-quadrant operation with both programmable DC output and regenerative DC loading within a single unit. High power components that can be tested include bidirectional on-board chargers (BOBC), bidirectional DC converters and DC-AC motor drivers, as well as power conversion simulation tests of batteries in both directions.

Compliant with both LV123 and LV148 standards for EV component testing, the 62000D has a fast cross-quadrant bandwidth that produces a rapid transient response time (as short as 1.5ms or less). A wide range of voltage and current combinations are available in constant power mode, and constant current and constant voltage modes are also available. Across the range, the maximum power that can be catered for is from 6kW to 18kW, with what MDL claims is an industry-leading power density of 18kW within a 3U rack height. Output current ratings are up to +/-540A, with voltage ratings up to 1800V DC. When greater power is required, master/slave capability enables up to ten of the units to operate in parallel to deliver up to 180kW.

Icons on the intuitive touch screen make it easy to carry out voltage/current settings and measurements, as well as programme the auto sequence control settings, and preview output waveforms. One hundred programmable user settings are available in the units' list mode and control interface options include USB, LAN, CANbus and GPIB as well as analogue APG.

In addition to the EV and HEV sector, the units could also have applications in renewable energy systems such as home energy storage, as well as in the development of motors, drives, inverters, batteries, fuel cells, etc.

For further information about the new Chroma 62000D series of b=bidirectional DC power supplies please go to

MDL Technologies Ltd

Unit 11, Devonshire Business Centre
Works Road

+44 (0) 1462 431981

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