EVSE Testing - NH Research (NHR)

EV Power Electronic Test Solutions

NHR provides electric vehicle test equipment for power electronic components including AC/DC loads and sources. Applications include testing the EV on-board charger (OBC), EVSE, APM, DC-DC converter, etc.

Our AC loads are ideal for simulating any inductive, capacitive or resistive load while our DC Loads are ideal for fast transient inrush simulations. The Regenerative 4 Quadrant AC Load has the capability of simulating almost any linear or non-linear load.

NHR’s Regenerative Grid Simulator can simulate power from The Grid while NHR’s Regenerative, Bidirectional DC Source and Load can simulate the DC input and output or act as a Battery Emulator.

Simulate power across the entire electric vehicle or e-mobility application with NHR’s e-mobility test solutions.

"Electrification requirements for Battery Electric Vehicles (BEV), Plug-in Hybrid Electric Vehicles (PHEV) & Fuel Cell Electric Vehicles (FCEV), are evolving with higher power demands. Voltage & power levels are transitioning from a traditional 300/400VDC to 800/1000VDC."

On-Board Charger Testing

The core function of the On-Board-Charger (OBC) in an electric vehicle is to take the incoming AC power, convert that energy to DC, and charge the main battery of the vehicle.

Testing the OBC requires both an AC power source and a DC load. Simulating facility power with NHR’s 9410 Regenerative Grid Simulator or AC Source allows the engineer to adjust the input frequency, voltage, and simulate power line disturbances. Simulating the battery system with NHR’s Battery Emulator or Regenerative DC Load allows the engineer to draw power from the DC side of the charger. There are some EV applications that take Level 3 chargers that have a DC input and output. For these applications, there would be an additional DC source at the input side.

DC-DC Converter Testing

The DC/DC converter converts the voltage to a lower level that can then be safely distributed throughout the vehicle. There are numerous EV components that run on lower voltages such as interior lights, radios, locks, etc.

Testing a DC-DC converter requires a DC input and DC output. NHR’s battery emulator is well suited for the DC input since this power normally comes from the main battery pack of the vehicle. A DC load can be used for the DC output to emulate the various DC loads on the bus. Sometimes multiple loads are added to emulate a complete vehicle loading system. Using battery emulation allows for accurate input characterization of the DC/DC converter, by having that ability to dynamically change the voltage input depending on the current demand.

EVSE Testing

Testing the EVSE requires both an AC power source and an AC load because EVSEs are typically an AC output. NHR’s 9410 Regenerative Grid Simulator allows the engineer to simulate the facility power by adjusting the input frequency, voltage, and simulate power line disturbances. NHR’s Regenerative 4 Quadrant Load allows the engineer to simulate the loading state of an onboard charger.

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