Electronic loads are load devices that can be set to the desired resistance value.
Internally they are made up of a combination of semiconductor elements. Since the repeated and rapid changing of loads is not possible by human hands, electronic loads are used to evaluate batteries and power supplies.
Operating Modes of Electronic Loads
Constant current (CC) operation
The unit operates at the current value that is set. Even if the terminal voltage changes during operation, the current will remain constant.
Constant voltage (CV) operation
The unit operates at the voltage value that is set. Even if the terminal current changes while discharging, the voltage will remain constant.
Constant resistance (CR) operation
The unit operates at the resistance value that is set. The value of the terminal voltage is measured, and is used to determine the value of the current for discharging according to the set value.
Constant power (CP) operation
The unit operates at the power value that is set. If the terminal voltage changes while discharging, a constant level of power can be consumed according to the change.
Example of the Use of Electronic Loads
Ideal for evaluation testing for DC motors on automobiles
Our REK Series of DC power supplies can be combined with our EHD Series to recover regenerative power from motors in order to evaluate motors without damaging the ECU or power supplies.
Electronic load with regenerative function
Recently, it is also used as a DC electronic load with regenerative function and regenerative power supply that regenerates load power to a commercial power system. We line up the regenerative electronic load and the regenerative DC power supply.
Charge and discharge power supply for battery inspection
Electronic loads are also used for battery charge and discharge tests. We have a lineup of CD series and CDPU series, which are a charge/discharge power supplies that can be used for repeated tests of charging and discharging various rechargeable batteries.
- Externally controlled via analog and digital interfaces
- Table-top and 19″ rack technology, turnkey system cabinets
- Permanently integrated interfaces and “plug n play” slot for interface retrofitting
- Modular highly insulated architecture, extremely reliable and filtered
- Many interface options: Analog, Ethernet, USB, CAN, Profibus, GPIB and many more
- User software EA Power Control (as freeware and payware)
- Operating modes CV, CC, CP, CR, battery test, MPPT (PV) simulationFor operation on all types of batteries (Pb, NiCa, Li, etc.) as well as photovoltaic (PV) strings, ultracaps, fuel cells, EV motors, alternators and other direct current sources
- Integrated function generator with predefined waveforms such as sine, rectangle, trapezoid, ramp, arbitrary
- Air and water-cooled versions
- Parallel switchable in Master-Slave mode
Features overviewTo the products
Lab or System
250W to 240kW
AC/DC Electronic Loads: Benchtop, Modular, and High Power
Chroma is the global leader in Electronic Load manufacturing for product design validation and functional testing. Chroma programmable DC Loads are used for power conversion testing in all markets including automated test systems, LED drivers, power supply testing, battery testing, and fuel cell testing. Chroma AC Loads are designed for testing uninterruptible power supplies (UPS), off-grid inverters, AC sources, and other power devices such as switches, circuit breakers, fuses and connectors. Chroma Loads can do it all including full current down to 0.4VDC, CZ mode, user defined waveforms, timing measurements, and 3 current ranges per load. Chroma Loads come standard with either USB or RS232 ports for control and can be configured for GPIB (IEEE-488) control as well.
We know you have a choice when selecting an electronic load, but the advantage is clear with Chroma. We invest more in R&D than any other manufacturer, so you can be sure you are getting the most out of your lab’s equipment budget.
- Highest accuracy available
- Full current down to 0.4VDC
- CZ mode for turn on capacitive load simulation (up to 50,000uF capacitance emulation)
- User defined waveforms
- Timing measurements for battery testing
- Real time power supply load transient response simulation and Vpk+/- measurement
Watch our Electronic Load Seminar
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All of our Electronic Loads are designed to satisfy both automated test system and laboratory benchtop requirements.
Bidirectional DC Power + Regenerative Loading
DC Electronic Loads
Portable Benchtop DC Load
Reliable, precision loads primarily designed to test switching power supplies, AC/DC power supplies, power electronic components, adapters, batteries and chargers.More Info
Buy Now at shopchromausa.com
Modular DC Loads
Up to 2000W per mainframe
80V, 150V, 600V
Designed for testing multi-output AC/DC power supplies, DC/DC converters, chargers, batteries, adapters, and power electronic components. Excellent for R&D to incoming inspection.More Info
High Power DC Loads
3kW – 24kW, up to 240kW
150V, 600V, 1200V
These high power DC electronic loads are designed for testing AC/DC power supplies, batteries and energy storage systems, EV/EVSE, solar inverter, and other power electronics.More Info
AC Electronic Loads
AC Electronic Load
1.8kW – 4.5kW, up to 67.5kW three phase
50V – 350Vrms
Simulate a variety of load conditions under high crest factor and varying power factors with real time compensation even when the voltage waveform is distorted.More Info
LED Simulation Loads
LED Simulator Electronic Load
Up to 1200W per mainframe
0 ~ 500V
The industry’s first LED simulator for LED driver testing to better simulate LED characteristics with increased bandwidth to allow for PWM dimming testing.More Info
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Electronic loads dc
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