1.35MJ Crowbar Resistor Air Cooling

1.35MJ Crowbar Resistor, Wind Power Generation

Crowbar Resistors

Crowbar resistors are three phase resistance banks which are connected to the rotor windings of the DFIG (Doubly-Feed Induction Generator) such as wind power generator.

They are used to prevent damage to the inverter circuits attached to rotor side when a fault occurs in the grid. DFIG power converter, which has a restricted over-current limit, needs special attention during faults in the grid. If the rotor current or DC link voltage reaches the threshold value, crowbar resistors disconnect the converter in order to prevent the generator turning into a squirrel cage induction machine. By crowbar resistors, the DFIG could stay connected to the grid and continue its operation.

The crowbar resistors should be high enough to limit the short circuit rotor current and also they should be low enough to avoid too high voltage in the rotor circuit. The crowbar resistor should be designed with low inductance and capable of handling very high currents for short periods.

Jingdacheng Electronics(JDC) is a leading power resistors manufacturer in China, and we are always focusing on providing various resistors and loading solutions since it was established in 1997. With 24 years industry experiences, JDC has a professional team for resistor designing, manufacturing and quality control, and most of our managements have been working for JDC at least 10 years. Even approved by ISO9001:2014, JDC started proceeding a very high standard (Japan JIS) of manufacturing and quality inspection since we built a long partner cooperation with Japan IWAKI MUSEN in 2013. Now, JDC is providing many resistors and solutions for some top500 companies, Such as: Huawei, Yaskawa, Panasonic, Midea, etc.