Feedback electronic load is a load device used for fuel cell engine system, fuel cell stack, power electronic equipment testing, etc. This product is based on PWM bidirectional rectification circuit and wide range voltage converter, which can feed back the energy of the battery to the power grid. It has high accuracy, high conversion efficiency, fast response speed, rich communication interface, and perfect protection function, which can effectively reduce the waste of electric energy during testing.

Application:

Fuel cell engine system test

Battery stack test

Charging column test

Features

1. It has constant current, constant power, constant resistance, constant voltage and multiple load modes.

2. It has fast transient response, ≤5ms.

3. It adopts high-speed digital control technology.

4. The load accuracy reaches 0.1%FS.

5. It adopts PWM rectification technology, with power factor>0.99, power supply end harmonics<3%, and efficiency greater than 93%.

6. It adopts buttons or 7-inch touch screen, which is convenient for operation and display.

7. It has multiple communication interfaces, which can realize remote operation, unattended operation and embedded test system.

8. It adopts modular design, which is easy to maintain the equipment in the later stage.

9. It adopts multi-phase interleaved DCDC and three-level high-efficiency feeder working mode, with low temperature rise, high operating reliability and long service life.

10.It has load end positive and negative reverse connection detection protection function. If the power supply load is reversed, the contactor is not allowed to close the switch.

11.The communication interface is CAN and RS485, and the CAN2.0B communication protocol is applicable.

Functions

1. Bidirectional DC power supply operation function

It has four operation modes: constant current, constant power, constant resistance, and constant voltage; you can set the load current, power, resistance, voltage and other operating parameters.

2. Emergency stop function

It has an emergency stop function. In case of emergency situations such as motor loss of control, you can press the emergency stop switch on the operation panel to stop the load urgently to avoid damage to the customer's equipment.

3. Self-diagnosis and protection function

It has rich protection functions such as load end overcurrent, overheating, short circuit, over-undervoltage, DC bus over-undervoltage, IGBT overcurrent protection, and phase loss, phase continuity, overvoltage, undervoltage and other protections at the feeder end. It can monitor various operating parameters in real time, automatically diagnose and quickly cut off the main circuit under abnormal conditions to avoid damage to internal devices.

4. Communication function

It is equipped with RS485 and CAN communication functions as standard; it can be connected to a PC to realize remote operation, unattended operation and embedded test system; it can realize product start, stop, set operating parameters and other operations through the communication interface, and can query the power supply operation status, operating parameter values, and alarm information in real time.

Technical Parameters