Electricity: single generator systems inventions 08/08

20080203978 - Frequency converter for a double-fed asynchronous generator with variable power output and method for its operation: A frequency converter circuit for a double-fed asynchronous generator with a variable power output, which can be connected to a voltage network contains a rotor rectifier, which can be connected to the rotor of the asynchronous generator, a network frequency converter, which can be connected to the voltage network, and... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20080197815 - Vehicle electrical system having a reverse polarization detector: A vehicle electrical system includes an alternator, a rectifier connected to the alternator, a battery which is connectable to the output connections of the rectifier, and a reverse polarization detector connected to the battery. The reverse polarization detector includes a diode. In addition, the reverse polarization detector has a threshold-value... Agent: Kenyon & Kenyon LLP

20080197816 - Synchronous rectification device and synchronous electric machine implementing the device: The invention pertains to a synchronous rectification device (10) of the H-bridge type supplying a coil (5) of a phase of a synchronous machine, comprising four switches (21, 31, 22, 32) disposed on the electrical links (11, 12) of this H-bridge and intended to be instructed by an electronic circuit... Agent: Lumen Patent Firm, Inc.

20080191668 - Method and apparatus for moving material: A method and apparatus for moving magnetic material includes an electromagnet for attaching and detaching the magnetic material where upon release of the magnetic material, the residual magnetic flux of the released magnetic material is reduced. The apparatus includes a generator coupled to the electromagnet. The generator includes a control... Agent: Factor & Lake, Ltd

20080186000 - Output control apparatus and method for field winding type dynamo-electric machine: A control apparatus for controlling an exciting current of a field winding type dynamo-electric machine having an exciting winding so as to obtain a demanded output thereof comprises an exciting current detecting circuit being configured to detect an exciting current of the field winding type dynamo-electric machine, a rotation speed... Agent: Oliff & Berridge, PLC