Category: DC Load

The Benefits of Regenerative Loads & Sources

Utility Grid Testing - NH Research (NHR)

Intro to Regenerative Loads & Sources

Traditional loads, either air-cooled or water-cooled, convert the unit-under-test’s (UUT) output power into heat waste whereas regenerative loads recycle the UUT output power back onto the facility or UUT in the form of re-usable electricity. This allows the test system to lower the total electrical usage while significantly reducing waste heat. For example a regenerative load with > 90% efficiency would return more than 90% of the UUT’s output power back to the facility and convert less than 10% of the UUT power into heat.

Traditional Electronic Loads vs. Regenerative Loads

An electronic load converts 100% of the discharge power (P = V*I) directly into heat. Unlike resistors, electronic loads are able to provide more sophisticated loading profiles such as constant current, constant voltage, and constant power, in addition to constant resistance. The load profile can be changed dynamically without disconnecting the UUT. Air-cooled electronic loads dissipate the waste heat into the air and can be used anywhere in a laboratory or manufacturing space as long as there is sufficient space or air-chiller capacity. Water-cooled electronic loads dissipate the waste heat through a water connection, which limits where these loads can be used. Testing may also get halted when the water-chiller system is under maintenance.

Regenerative electronic loads convert discharge power (P = V*I) back into usable electricity for the facility, thereby increasing flexibility in two ways. First, the total power demand and associated electrical costs are reduced. Second, regeneration creates significantly less waste heat, which in turn reduces  the energy and equipment required for facility cooling. This allows maximum flexibility when planning, upgrading, or rearranging laboratory or manufacturing workspaces.

Regeneration Significantly Reduces the Cost of Heat

Using regenerative AC and DC loads and sources dramatically reduces the total amount of power required from the utility.  This is because the UUT can use the power from both the utility connection and the power returned by the regenerative load. This directly reduces the total amount of power used by the facility to conduct the required testing, the amount of waste heat, and the power to remove the heat. Additionally, the total cost of ownership of traditional loads often includes far more than just the initial purchase of the load. Traditional loads imply more electrical usage and higher electrical usage may require electrical system upgrades to support additional test stations. Each new station will generate significant amount of waste heat, which may require facility modifications such as new air-handlers or water-chiller connection points. All these costs can be associated with simply trying to remove waste heat.

NHR Regenerative Test Solutions

NH Research (NHR) provides regenerative AC and DC loads with expandable power to meet future higher test-power needs. This modular design allows for maximum flexibility in test by providing unmatched configuration options as well as future scalability. Both AC and DC products are bi-directional allowing them to reverse power flow using the same internal electronics.

Regenerative AC/DC Loads and Sources:

To learn more about potential cost savings , download our Regenerative Loads and Sources Application Note.

Download “Regenerative Loads & Sources” App Note

Lockheed Martin Selects NH Research Test Solution for eCASS Program

NH Research Model 4300 modular DC load solution to support U.S. Navy test systems

NHR eCass Program - NH Research (NHR)

“NH Research Inc. (NHR), a leading provider of power electronics test systems and instruments for the aerospace, defense, automotive, and energy industries, announces Lockheed Martin Rotary and Mission Systems has selected NHR’s Model 4300 modular DC load solution for the electronic Consolidated Automated Support System (eCASS) program test systems to support the U.S. Navy.

NHR’s 4300 modular DC electronic load subsystem has become a popular choice for aerospace and defense automated test equipment (ATE) systems where space, performance, and reliability are important. The 4300 platform provides six different load sizes and a digital power analyzer in a small footprint and can eliminate the need for additional relays and other test measurement devices.

“NH Research has been working with Lockheed Martin on the original CASS program and now the eCASS for over 30 years,” said Peter O’Brien, Vice President of Sales and Marketing at NH Research. “NH Research’s proven 4300 platform, combined with our automated test systems experience, enables us to provide Lockheed Martin with reliable and cost effective solutions.”

“The 4300 platform from NH Research provides us with the performance, reliability, and long-term support we need for the eCASS Program.” said Ed Melville, Automated Test Systems Portfolio Manager at Lockheed Martin. “We look forward to working together in the future.”

For more information about eCASS, visit www.lockheedmartin.com/eCASS.

About NH Research

NHR enables electrification by accelerating innovation, validation and functional testing of today’s technologies. Backed by over 50 years of experience in power conversion and power electronics test systems and instruments, our test solutions deliver the performance, simplicity, and safety that engineers and researchers in aerospace, defense, automotive and energy industries require. For more information visit www.nhresearch.com.

About Lockheed Martin

Headquartered in Bethesda, Maryland, Lockheed Martin is a global security and aerospace company that employs approximately 105,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services.

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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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