Category: Modular DC Load

DC Electronic Loads with Accuracy, Reliability & Speed

Modular, Benchtop DC Electronic Loads 120V, 600V

4700 DC Electronic Load (front)If you’re looking for a DC electronic load with high current and low voltages, or low current and high voltages, NH Research (NHR) has a range of options. NHR’s DC Electronic Loads are ideal for testing medium-to-high-power applications in all markets.

All of NHR’s DC electronic loads provide ultra-fast transient simulations and comprehensive measurements to accurately test real-world conditions. The 4700 DC Load (120V) is well-suited for low voltage and high current applications whereas the 4670 DC Load (600V) is ideal for high power applications. The 4300 Series DC Loads are ideal for lower power, multi-channel testing and 9300/9200 NHR’s Regenerative DC Loads offer increased energy savings and additional bi-directional capability.

4700/4760 Benchtop DC Loads

In this article, we’ll share details specifically on the benefits of the 4700/4760 benchtop DC loads. This series can be used as part of an automatic test station or as a stand-alone, bench-top set-up. Our modular, flexible test equipment has the accuracy, reliability, and speed required for applications such as DC converters, avionics, fuel cells and batteries, EV components, radar testing, power supplies and much more.

With a large user-friendly interface, test engineers can easily use this equipment for engineering characterization and test program development. It can be operated manually through the touch-panel, or automated. Automated testing may be PC-controlled either through NH Research’s emPower™ test executive or user-written test programs in LabVIEW, LabWindows/CVI or in any programming language which supports IVI Drivers.

Create Complex, Fast-Transient Load Profiles

NHR’s DC Electronic Loads (4700/4760) are capable of creating a wide variety of complex dynamic load profiles. Types of profiles include micro-second pulses, multiple pulses of varying width, stepped responses, variable slew rates and even simulating an AC component on the DC waveform.

The key to this capability is called a Macro, each of which contains up to 100 steps and is executed directly by the load to achieve the fastest possible transition speed. Once created, Macros can be stored in the system controller for downloading to the load when execution is required.

Fast Transient Load Profile - NH Research (NHR)

Figure 1 – Various Fast Transient Load Profiles

Scalable Power, Wide Operating Envelope

Easily add power modules scale power and meet new testing demands over time. For added flexibility, NHR’s dc electronic loads also have a wide operating envelope to provide rated power anywhere between 5V and 120V. Below 5V the load maintains full current capability down to 1V and then linearly reduced current down to 0.15V.

Constant Power Operating Envelope - NH Research (NHR)

Figure 2 – Constant Power Operating Envelopes

For more information, please visit our product webpage or contact us for a quote.

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Applications Include:

  • ATE Testing: Radar Power Testing, Aviation, Power Supply, Solar Panel
  • Power Devices: Chargers, Adapters, DC Supplies, LED drivers, Telecom Rectifiers
  • Fuel Cells/Super Capacitor Test
  • Power Conversion
  • EV Subsystem Test: OBC, V2G, APM, DC/DC Converter
  • Ideal for Fast Transients, Ultra-low Voltage Loading (down to .01 VDC)
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DC Electronic Loads with Maximum Testing Flexibility

NHR eCass Program - NH Research (NHR)

If you’re looking for a DC electronic load that is capable of high performance, multi-channel testing, the NH Research (NHR) 4300 model is the ideal test solution.

NHR’s 4300 DC Electronic Loads are used across a variety of industries. This modular, flexible test equipment has the accuracy, reliability, and form factor required by automated test equipment (ATE), military and aerospace applications. The 4300 DC electronic load is perfect for applications that require simultaneous testing of multiple power conversion UUTs or multi-output power supplies.

For over 30 years, Lockheed Martin has used NHR’s 4300 DC Electronic Loads for the electronic Consolidated Automated Support System (eCASS) program. The chassis model easily integrates into their test systems to support the U.S. Navy’s test requirements. Read the Press Release here.

NHR’s DC Loads: Key Capabilities

This flexible load measurement system can be reconfigured easily to test products in parallel which better simulates real-world conditions and improves testing time. The capability to combine up to 16 loads into a single chassis, with fast transient speed and synchronous measurement, opens several new test strategy possibilities. There are 25 different combinations of DC electronic loads that can be configured using the 150 W, 300W and 600W options (Fig.1). NHR’s 4312 and 4350 DC Electronic Loads offer the maximum configuration flexibility depending on your changing test requirements.

Chart 4300 Multiple Load Configurations - NH Research (NHR)

Figure 1 – 5 of the 25 possible load configurations using 150W, 300W & 600W dc loads.

Another major advantage is the built-in data sheet digital power analyzer model 4301 that provides accurate UUT input measurements dedicated to each tester channel. This advanced digital measurement system is capable of measuring devices in a few seconds. The analyzer includes a power meter, multi-meter, and oscilloscope that together provides a powerful test solution.

This distributed measurement capability allows measures each output from a multi-output power conversion device simultaneously rather than sequentially. Not only does this dramatically reduce the overall test time but also provides far better channel-to-channel performance measurements including dynamic cross effects. This flexible DC electronic load and measurement system allows you to reconfigure the loading arrangement as required by future test needs.

For more information, please visit our product webpage or contact us for a quote

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Applications Include:

  • ATE Testing: Radar Power Testing, Aviation, Power Supply, Solar Panel
  • Power Devices: Chargers, Adapters, DC Supplies, LED drivers, Telecom Rectifiers
  • Fuel Cells/Super Capacitor Test
  • Power Conversion
  • EV Subsystem Test: OBC, V2G, APM, DC/DC Converter
  • Highly Modular, Flexible & Compact Test Requirements
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Advanced Test Equipment Rentals & NH Research, Inc. Announce 9300 Rental Agreement

High Voltage Battery Test System 9300 Series Advanced Test Equipment Rentals (ATEC) and NH Research, Inc. (NHR) today announced a rental partnership agreement for NHR’s 9300 Battery Test Systems. NHR is a world-leading manufacturer of power electronics and battery test instruments as well as test systems. ATEC is a worldwide leading rental company of test equipment for military, defense, aerospace, communications, semiconductor, consumer electronics, and many other sectors and able to supply NHR’s high-power battery charge/discharge test systems.

NHR’s 9300 Battery Test System is designed for either characterizing or emulating all battery chemistries including lead-acid, nickel-cadmium, and lithium-ion. This test system is a regenerative, fast-acting, modular, dual-range, bi-directional DC source/load providing up to 100kW per system in either a high-current (600V/333A) or high-voltage (1,200V/167A) range. When more than 100kW is needed, the modular design allows easy expansion up to 1.2MW in 100kW increments making the 9300 ideally suited for energy storage testing used in electric-vehicles (EV) and energy storage systems (ESS).

The 9300 is fully programmable allowing it to act as a fast-acting source (charge), a regenerative dc load (discharge), or a bi-directional voltage source (battery) with any programmed combination of constant power, constant voltage, and constant-current regulation limits. It’s frequently used for battery charge/discharge cycling or emulates a battery for testing chargers as well as other battery related power devices.

Known as the latest in battery turn-key solutions, the 100 kW NHR 9300 is a welcome addition to ATEC’s continuously expanding inventory of power supply and loads test equipment. ATEC offers long and short-term rentals of test and measurement equipment for a variety of industries and applications. Customers prefer to rent from ATEC to test out equipment like the NHR’s 9300 before they buy, when they have a short-term need, if they need an urgent replacement or for any other rental reason. Because of an extensive inventory of in-stock products and the latest technology on the market (like that used within NHR’s products), ATEC is able to create flexible, affordable rental plans and pricing options to match specific client needs, with no waiting. The experienced technical and customer support staff helps provide the knowledge, equipment, and solutions customers need to perform their tests. ATEC also offers many other NHR products, including standalone AC and DC loads, and power supplies.

“The NHR 9300 gives our clients another exceptional piece of equipment with which they can test batteries, fuel cells, ultra-capacitators, and other energy storage devices,” said Louis Marin, Team Lead of the Power Supplies and Loads department at ATEC. Marin, who is well versed in battery and loads equipment, is confident the NHR 9300 will serve ATEC clients well. “The 9300 High Voltage Battery Test System can be applied to testing for automotive, aviation, industrial, marine, grid storage, research, and other lab market purposes, or connected in parallel for even more Kilowatts,” Marin said. “Many of our customers will benefit from having this technology as a rental offering, and we are happy to provide it.”

“NHR designs products which provide immense flexibility in hardware as well as software solutions to our customers”, said Martin Weiss, Product Director at NHR. “The battery industry is no longer required to adjust their testing schemes to meet the either the hardware or software limitations imposed by other equipment suppliers.” Martin said. “Working with ATEC allows customers to access our solutions very rapidly making it easier to engineers to justify a future capital purchase or cover a short-term testing need. We look forward to working with you directly or with our partners in the near future.”

NHR’s 9300 Series High Voltage Battery Test System is available for purchase from NHR, or rent from ATEC.

About Advanced Test Equipment Rentals

Since 1981, Advanced Test Equipment Rentals (ATEC), a leading high tech equipment rental company provides short and long-term rental solutions of testing, analysis, inspection, measurement, monitoring, simulation, powering, certifying, and commissioning equipment to the aerospace, automotive, biomedical, communications, consumer electronics, defense, environmental, engineering, marine, power grid, transportation, and compliance testing companies. ATEC is ISO-9001 certified, and ISO 17025 Accredited in calibration.

To find out more about ATEC visit www.atecorp.com.

About NH Research, Inc.

NH Research, Inc. (NHR) designs and manufactures power electronics and battery test instruments as well as complete turn-key test systems. Its products are used worldwide by manufacturers in the switching DC power supply, UPS, battery, and battery charger industries. Applications typically involve either characterization or final test of customer products where a combination of advanced measurements, rapid test times, and ease of setup and use are important. NHR has been supplying power electronics test solutions for over 50 years (more about NHR) with fully equipped facilities with highly skilled employees in Irvine, California and Shenzhen, China.

To find out more about NH Research, Inc. visit www.nhresearch.com.

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