Dual channel battery test power supply adds modelling support

August 21, 2019 //By Nick Flaherty
The R&S NGM200 supports the development of battery-powered equipment operating at up to 20V and drawing currents up to 6A
The R&S NGM200 family supports the development of battery-powered equipment operating at up to 20V and drawing currents up to 6A

Rohde & Schwarz has launched single-channel and two-channel power supplies for the development and testing of battery-based systems.

The R&S NGL200 and R&S NGM200 series uses a two-quadrant architecture that provides both source and sink functions to simulate the charging and discharging of batteries as well as to operate as an electronic load.

One of the new features includes a battery simulation option supports the modelling of batteries to simulate real life conditions. For any battery-driven equipment, simulating changes in battery output performance provides realistic power conditions at different stages of the battery life. With the integrated battery model editor, users can create their own battery models by defining battery characteristics such as the state of charge, open-circuit voltage and equivalent series resistance. Pre-defined data sets for the common battery types Lead, Lithium-Ion, Nickel-Cadmium, or Nickel-Metal hydride are included.

Devices that switch from a few microamps in sleep mode to several amps in active mode benefit from a fast load recovery time of less than 30 µs and a FastLog function captures spikes even in the µs range. Additional measurement ranges increase the read-back accuracy in the lower ranges and a built-in digital voltmeter measures voltage values at any point in circuits of the device under test.

To better analyze a battery test, users can capture variations in voltage or current values as short as a few µs thanks to the high-speed data logging function FastLog. The NGM200 logs measurement values for voltage and current at an acquisition rate of up to 500 ksample per second. A two-channel NGM202 can even run data acquisition on both channels in parallel.

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