Bi-directional power supply simplifies EV powertrain testing

Bi-directional DC power supplies from MDL Technologies, the Chroma 62000D series are particularly suitable for high current testing of electric vehicle powertrain components. The series provide two-quadrant operation with both programmable DC output and regenerative DC loading within a single unit.

It can test high power components, such as bi-directional on-board chargers, bi-directional DC converters and DC/AC motor drivers, as well as power conversion simulation tests of batteries in both directions.

Compliant with LV123 and LV148 standards for EV component testing, the 62000D has a very fast cross-quadrant bandwidth that produces a rapid transient response time as short as 1.5 milliseconds or less. A range of voltage and current combinations is available in constant power mode. Constant current and constant voltage modes are also available.

Maximum power is from 6.0 to 18kW, with what is claimed to be 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 10 of the units to operate in parallel to deliver up to 180kW.

The touchscreen has icons for users to carry out voltage/current settings and measurements, as well as functions such as program auto sequence control settings and preview output waveforms. There are 100 programmable user settings in the units’ list mode. 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 be used in renewable energy systems such as home energy storage, as well as being invaluable in the development of motors, drives, inverters, batteries and fuel cells, says MDL Technologies.

MDL Technologies is an independent UK company supplying a comprehensive range of electronic test and measurement equipment and facilities, as well as offering full consultancy, project management, installation and testing services. It operates in partnership with leading equipment manufacturers in fields such as power, EMC, RF, microwave, wireless, electrical safety and video test solutions.

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