Patent ID: 8059428
Filing Date: 2011-11-15
Classification: H01F,H02M

Abstract:
1. A reactor arrangement for providing inductive reactance for alternating electrical current, the reactor arrangement comprising: an alternating voltage terminal for receiving the alternating electrical current for which the inductive reactance is to be provided, a first direct voltage terminal, a second direct voltage terminal, a magnetic core element made of magnetically amplifying material, a first unidirectional electrical component on a first electrical current path from the alternating voltage terminal to the first direct voltage terminal, a second unidirectional electrical component on a second electrical current path from the second direct voltage terminal to the alternating voltage terminal, at least one permanent magnet arranged to generate a biasing magnetic flux component into the magnetic core element, a first coil on the first electrical current path, and a second coil on the second electrical current path, wherein, so as to provide the inductive reactance for the alternating electrical current, the first unidirectional electrical component and the second unidirectional electrical component are arranged to direct the alternating electrical current to the first coil as a response to a situation in which the alternating electrical current is positive and to the second coil as a response to a situation in which the alternating electrical current is negative, the first coil is arranged to magnetize the magnetic core element in a direction opposite to the biasing magnetic flux component as a response to a situation in which the alternating electrical current is directed to the first coil, and the second coil is arranged to magnetize the magnetic core element in the direction opposite to the biasing magnetic flux component as a response to a situation in which the alternating electrical current is directed to the second coil, and the biasing magnetic flux component generated with the at least one permanent magnet relieves magnetic saturation of the magnetic core element.