Controlled rectifier bridge with over-voltage protection
First Claim
1. A controlled rectifier bridge for a generator having a plurality of phase windings and one exciter winding, which includes rectifier elements embodied as MOS field effect transistors that are connected to the phase windings of the generator and that rectify the voltage supplied to the generator before it is delivered to a battery and to electrical loads, in which the level of the generator voltage is regulated by means of a voltage regulator that varies the exciter current flowing through the exciter winding, characterized in that the exciter winding is assigned a protection circuit, which converts the magnetic energy, stored in the exciter winding upon a rapid reduction of load, into electrical energy and feeds it back into the battery, thereby deexciting the exciter winding.
2 Assignments
0 Petitions
Accused Products
Abstract
A controlled rectifier bridge for a generator having a plurality of phase windings and one exciter winding is constructed as a self-controlled rectifier bridge with MOS field effect transistor. To allow the use of such a rectifier bridge upon a fast load reduction with an attendant load-dump voltage, a voltage protection circuit is employed that feeds the energy, stored in the exciter winding upon a fast shutoff, back into the battery, thus deexciting the exciter winding. Upon a fast load reduction, the generator windings are short-circuited by suitable triggering of the low- or high-side transistors.
46 Citations
4 Claims
- 1. A controlled rectifier bridge for a generator having a plurality of phase windings and one exciter winding, which includes rectifier elements embodied as MOS field effect transistors that are connected to the phase windings of the generator and that rectify the voltage supplied to the generator before it is delivered to a battery and to electrical loads, in which the level of the generator voltage is regulated by means of a voltage regulator that varies the exciter current flowing through the exciter winding, characterized in that the exciter winding is assigned a protection circuit, which converts the magnetic energy, stored in the exciter winding upon a rapid reduction of load, into electrical energy and feeds it back into the battery, thereby deexciting the exciter winding.
Specification