E-Mobility & EV Powertrain HV Test

E-Mobility & EV Powertrain HV Test

The electrified powertrain runs on a high-voltage bus that did not exist in the combustion era. Traction batteries, inverters, DC-DC converters, on-board chargers, and motors all share a rail at a nominal 400 V or 800 V, and the next generation pushes higher. Every one of those components has to be tested for the conditions it sees in service: full bus voltage, the currents that real load draws, and the isolation that keeps that energy away from the chassis and the occupant.

Two demands make this work distinct from ordinary high-voltage test. The first is current. Running an inverter, a DC-DC converter or an on-board charger at its 800 V input draws amperes even at partial load, and the supply has to source that current while holding its set point. The HVX-Series is a source: it supplies current into the device under test and does not absorb it, so a battery emulator that must sink regenerative or charging current is a different class of equipment. The second is grounding. Much of EV test is done on floating architectures, where the high-voltage bus is deliberately isolated from earth, and the supply has to match that topology. A hard earth-referenced rail in a potential-free rig either defeats the isolation measurement or trips protection.

On top of that, the work is repetitive and automated. Powertrain and battery test runs across many units, follows scripted sequences, and logs everything. The supply is one node in a larger rig, and it has to take commands and report state without an operator standing over it.

For potential-free rigs, the HVX-1500-1400 FLO and HVX-1500-2000 FLO have a floating output with no internal earth tie, so the supply does not force a ground reference on an isolated high-voltage architecture. State the potential the floating output must ride on, relative to earth, when specifying the unit, so the configuration matches the rig's insulation. Where a test plan instead needs a defined earth reference or both polarities, reversible earth-referenced models cover that case.

The supply is built for automation. Ethernet and RS232 are on board with a standard SCPI command set, the front panel keeps a time-tagged event log, and configurable code protection guards the setup between shifts. Drop it into a benchtop rig or rack it in a 2U slot beside the rest of the powertrain test stack.

Two options matter here. Ramp Control brings the bus up at a defined gradient rather than a hard step, which is safer for energized battery and inverter setups and gives a repeatable rise across every unit in a production validation run. Arc Detection watches for flashover across isolation barriers and can shut the output off when it sees one, which protects the device under test and records the point where insulation gave way. For isolation and dielectric withstand checks on individual components rated above 1.5 kV, step up to the 5 kV class while keeping the same option set.

If the same cell also performs isolation or withstand checks on discrete components, add a HVX-5000-600 in the reversible configuration so the bench covers both the bus-level work at 1.5 kV and the higher-voltage component checks. Rack both 2U units together and run them from the same automation layer.

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