Improved auxiliary winding technology for alternator range.

20 October 2019

AREP+ is said to significantly improve the electrical performance of equipped alternators, offering gains in motor starting capacity of up to 30%.

AREP+ will be progressively offered on the Leroy-Somer TAL industrial alternator range from November. The new system uses the output voltage of the main stator as H1 and a single auxiliary winding H3 inserted in selected slots of the main stator. 

The combination of these inputs is then used to power the controller, combining the power of a traditional Shunt system with the reliability and control level of an AREP system. Under the same conditions, more power is taken to supply the regulator, which increases the excitation capacity.

This excitation system is made possible due to the improvements brought by Leroy-Somer to its range of regulators such as the R180 or the D350. The new regulators are said to be able to process higher voltages than with a standard AREP system without any risk for the excitation chain.

Starting kVA performances are improved by up to 30% depending on the generator models. This level of performance is decisive in situations where generators are used in an industrial context where electric motors must be started.

Because of its design, the AREP+ technology also offers other performance improvements, including accelerated response times of the excitation chain, with an observed decrease of 20 to 30% and quicker startup of the excitation system, up to twice as fast with a theoretical start possible from 20 Hz.

AREP + technology will be rolled out over the company’s TAL range before the end of the year, and on the LSA range from the beginning of 2020. It replaces the current AREP technology, which will eventually be completely replaced.

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