Electronic Power Conversion Application Test Solutions
NH Research, Inc. (NHR) has designed, built, installed and supported industry leading test instrumentation and turnkey test systems world-wide for over 50 years. Both instruments and systems are typically used to functionally test a wide variety of customer’s power conversion devices at either the research & development stage or at the end of a customer’s production line as the final check that their product is meeting all its specifications. In both functional areas, NHR provides highly flexible configurations, ease of programming, comprehensive measurement capability and exceptional test throughput. Some of the application test solutions NHR has delivered include the following:
EV/HEV & Traction Battery Testing
There are two types of test equipment for battery test.
The Model 9200 Battery Test System consists of bi-directional, regenerative DC power modules with voltages of 40, 120 or 600V. Capable of charge/discharge and cycle testing of 10 – 250kW module and pack-level batteries, this highly flexible system can be integrated into an existing software environment, run from a PC with NHR’s Enerchron® Test Manager or locally through a touch-panel located on the 9200 cabinet.
The High-Current DC Electronic Load (120V) 4700 Series and High-Voltage DC Electronic Load (600V) 4760 Series air-cooled dc loads can be used in applications where discharge only is needed. These loads can be controlled either through LabVIEW or NHR’s Enerchron® Test Manager.
Industrial Battery Charger Testing
The test of battery chargers without using an assortment of batteries of declining charge state provides the advantages of more consistent test results in addition to increasing test throughput. One NHR solution with capability up to 48 kW, utilizes a combination of a Model 4700/4760 DC Load along with a programmable DC source to emulate a battery. Another NHR solution, with capability up to 72 kW, uses the 9200 Battery Test System with its bidirectional loads in a battery emulation mode.
DC Power Supply Testing
The original test system business of NHR is now in its 4th generation with 4 types of testers.
- The S400 Series – a compact production tester in 3 sizes for small-to-medium power levels
- The S600 Series – the newest tester with capability of testing from 1 to 16 channels in parallel with complete precision measurements
- The 5600 Universal Tester – a highly flexible tester that can be custom configured to meet the test requirements of a wide range of DC supplies
- The 5700 Engineering Characterization Tester – When performing design verification tests or just seeking more extensive testing of high-reliability power supplies all the tools are here to achieve both comprehensive testing and reporting almost immediately.
LED Power Driver Testing
In this highly competitive industry, achieving the lowest cost of test is usually one of the most important factors in selecting a tester. NHR meets that requirement by being able to fully test up to 16-units in a single pass. NHR equipment required is a Model 600 Test System. Note that due to the single-card form factor for most channel instrumentation, a 16-unit tester will fit within a 30”-high cabinet.
Charger & Adapter Test
Charger and adapter testing is another area where being competitive demands hyper-fast testing. Testing one unit at a time or even a handful of units at a time simply isn’t competitive anymore. NHR meets that requirement with its Model 600 Test System and its ability to test up to 16-units in a single pass. An added benefit is that the Model 600 has the smallest form factor in the industry, which makes it easy to integrate into a conveyor-based production line.
Aerospace, Avionics & Defense
Generally, throughout the Aerospace, Avionics and Defense industries there is a requirement to test at higher standard than elsewhere in most instances because the consequences a product failure are severe. This highest level of functional test is economically feasible with the turnkey 5700 Engineering Characterization Test System. Not only is the hardware capable of comprehensive testing but the programming and report formatting together make this system ready to deliver outstanding results almost immediately.
Another area NHR excels within the defense ATE community is its modular DC loads and sources. Both the Modular Test System S400 Series and the Modular DC Electronic Loads 4300 Series are meeting the high performance and limited space requirements of several major defense ATE programs today.
CFL Dimmer Testing
In this application, switches, dimmers, and ballasts must be certified to withstand the huge turn-on current surge created by the most challenging standard of tungsten-filament lamps. Regulations include UL 508 Section 61C, 17th Edition, NEMA 410-204, UL 1472 Overload (in-rush stimulation only), and UL 20(various sections). NHR products required to do this include the Model 4700 and Model 4760 Programmable DC Loads
PV/DG Grid Tied Inverter Testing
The NH Research, Inc. 9410 Grid Simulator can provide a 1Φ, 2Φ, or 3Φ simulated utility connection while allowing per-phase controls for amplitude, wave shape, & the relative to a phase angle relationship. These features allow testing of any number of AC conditions including phase imbalance (in voltage and/or phase angle relationship), voltage sag, frequency changes, & harmonic injection. The included measurement system removes the need for an additional power meters, DMMs, oscilloscopes, or spectrum analyzers.
The 9200 Battery Test System includes a charge mode, a discharge mode, & a state of the art battery emulation mode which allows testing of a battery or electronically-emulating a battery. Using battery emulation replaces a real battery thereby eliminating risks associated with a battery failure even those potentially caused by a unit-under-test (UUT) failure. Additionally, battery emulation produces faster and more consistent testing by eliminating battery-related preparation time, operator errors, ∓ result variations due to temperature or aging.