Chroma 62000D Series programmable bidirectional DC power supplies have both power source and load characteristics.Capable of feeding power from the device under test (DUT) back to the utility grid, these two-quadrant power supplies are ideal for testing energy storage systems in renewable energy applications such as solar PV/storage hybrid inverters, battery power conditioning systems (PCS), and simulating charging and discharging of energy storage batteries.62000D also has applications in testing power components in electric vehicles (EVs) as well as bidirectional on-board chargers (BOBC), DC-DC converters, and DC-AC motor drivers, enabling bi-directional power conversion simulation tests without the need for actualbatteries.
Tr a d i t i o n a l DC power supplies need protection diodes to prevent back EMF from damaging the power supply during motor testing. However, 62000D bidirectional DC power supplies can drive the motor and also efficiently regenerate EMF to the grid, avoiding the need for blocking diodes while saving space, energy, and configuration effort. In addition, the fast transient response of the 62000D enables seamless quadrant changing in less than 1.5ms (-90% to +90% load).
The 62000D series is available in 3U and 4U form factors, all boasting high power density. The 3U models come in single-unit output power ratings of 6kW/12kW/18kW, while the 4U models have single-unit output power rated 36kW/45kW. The 62000D-HLmodel features unique dual-range output capability, allowing a single unit to provide both High (2000V/60A/45kW) and Low (650V/180A/45kW) output ranges. This enables the unit to meet high-current, fullpower test conditions of the DUT while also meeting high-voltage, full-power test requirements, suitable for wide-ranging testing needs such as the 400V and 800V battery platforms used by EVs and EV supply equipment (EVSE).
The 62000D series supports up to 100 programmable sequences through its List Mode feature. Its fast transient response time meets many testing needs, including those defined in the LV123 and LV148 standards for EV components. When used with Chroma’s Softpanel software, users can conveniently conduct complex tests with a simple press of a button.
The 3U models have a universal 200- 480Vac input voltage and the 4U models have a universal 380-480Vac input voltage. All units have active PFC low current harmonic feedback, which significantly reduces e l e c t r i c i t y costs and power system configuration in high power test environments, lowers test environment temperature, and is suitable for power systems in all regions globally. Various control methods are available, supporting digital USB/LAN/CAN/GPIB interfaces and analog APG interface control, with the 2000V models additionally supporting CAN FD.
The 62000D-HL bidirectional DC power supply features two ultra-wide output ranges within a single unit. For the 62450D-2000HL model, the High range provides 2000V/60A/45kW, while the Low range offers 650V/180A/45kW. Users can easily switch between the needed ranges to meet test conditions requiring either high voltage or high current. With such a wide operating range, in addition to the High range satisfying high voltage test points, users can even utilize the Low range's high current capability in load mode to perform long-term reliability testing on two devices under test with a single piece of equipment.
Users can switch between the 62000D-HL model's dual output ranges by simply pressing the switch on the front panel touchscreen, or by sending a remote command. In an automated test equipment (ATE) production line system, only one 62450D-2000HL is needed - switching between the High/Low ranges via command satisfies both output range operations. After switching, the test instructions can proceed without interruption. Users do not need additional manual disassembly/re-assembly of bridging fixtures at the equipment output terminals, making for a seamless and safe testing experience.
