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A slowly rotating synchronous generator (ring generator) for a wind power installation, the generator having a rotor and a stator surrounding the rotor, and the stator having at least one three-phase current winding on which a capacitive current is impressed, and the generator having a part of the e

A slowly rotating synchronous generator (ring generator) for a wind power installation, the generator having a rotor and a stator surrounding the rotor, and the stator having at least one three-phase current winding on which a capacitive current is impressed, and the generator having a part of the exciter power of the generator produced by the stator.

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1. A rotating synchronous generator, in particular a ring generator, for a wind power installation, comprising:a rotor, a stator surrounding the rotor, wherein the stator has at least one three-phase current winding, and a compensation unit comprising capacitors, inductors and damping resistors, whi

1. A rotating synchronous generator, in particular a ring generator, for a wind power installation, comprising:a rotor, a stator surrounding the rotor, wherein the stator has at least one three-phase current winding, and a compensation unit comprising capacitors, inductors and damping resistors, which are connected to the stator for impressing a capacitive current into the stator and/or for producing a part of the exciter power of the generator by a capacitive current, the capacitors, inductors and damping resistors of the compensation unit being selected to provide a rectifier connected downstream of the generator with a harmonic power, wherein the voltages induced in the stator are of a substantially trapezoidal configuration. 2. The synchronous generator according to claim 1 wherein the synchronous generator is a multi-phase generator and that means for reducing the exciter current are provided between the individual phase conductors of the stator winding.3. The synchronous generator according to claim 2 wherein the means for reducing the exciter current are provided by capacitors and/or filter circuits for providing a stator current.4. The synchronous generator according to claim 1 wherein the stator winding comprises at least two three-phase windings which are respectively displaced with respect to each other through 30°.5. The compensation unit according to claim 1 wherein the compensation unit supplies a sixth current harmonic for the stator.6. The synchronous generator according to claim 1 wherein the generator is a permanently excited generator.