摘要:
An electrical machine stator is disclosed that includes a stack of laminations configured to be assembled together so as to define at least one stator tooth. Each lamination may include an inner edge, an outer edge and first and second side edges extending at least partially between the inner and outer edges so as to define at least a portion of the at least one tooth. Additionally, each lamination may define a nesting feature between the first and second side edges, wherein the nesting feature of each lamination is engaged against the nesting feature of an adjacent lamination when the stack of laminations is assembled together.
摘要:
An electromagnetic braking system of a power generation system includes an electrically conductive disc coupled to a rotatable shaft operatively coupled between a prime mover and a generator; a controller for receiving a status signal from the power generation system and for generating a control signal based on the status signal; and an inducting unit for applying an electromagnetic braking force on the electrically conductive disc when commanded by the control signal to regulate a rotational speed of the rotatable shaft.
摘要:
An electromagnetic braking system of a power generation system includes an electrically conductive disc coupled to a rotatable shaft operatively coupled between a prime mover and a generator; a controller for receiving a status signal from the power generation system and for generating a control signal based on the status signal; and an inducting unit for applying an electromagnetic braking force on the electrically conductive disc when commanded by the control signal to regulate a rotational speed of the rotatable shaft.
摘要:
An apparatus for enabling transmission of signals and data via means of infrared (IR) light for a wind turbine includes a plurality of IR data communication elements configured to provide unidirectional and bidirectional IR data exchange between non-rotating portions of the wind turbine and the rotatable wind turbine hub.
摘要:
A magnetically geared machine having an integrated cooling concept is provided. The machine includes a rotor having an inner surface and an outer surface, a magnet assembly coupled to one of the inner or outer surfaces of the rotor, and a stator having a plurality of stator windings. The machine further includes a magnetic flux modulator interposed between the rotor and the plurality of stator windings, where the flux modulator includes a plurality of magnetically conductive portions and a plurality of non-magnetically conductive portions placed alternately, where one or more of the plurality of non-magnetically conductive portions comprise a channel for a cooling fluid.
摘要:
A system to provide constant speed mechanical output in a wind turbine is provided. The system includes at least one electrical machine configured to convert a rotary mechanical power received from a main gear to a machine electrical power. The system further includes one or more electrical converters electrically coupled to the machine and configured to convert the machine electrical power from a direct current (DC) power to an alternate current (AC) power or from the alternate current (AC) power to the direct current (DC) power, where the converters generate a differential electrical power. A torque converter is electrically coupled to the electrical converters and generates a constant speed mechanical output employing the differential electrical power received from the one or more electrical converters.
摘要:
The invention relates to a wind energy system with hydraulic energy transmission with non-symmetric actuation. The non-symmetric actuation is caused by valve control and mechanical means for controlling the actuation of the pistons. A cylinder unit is provided comprising a drive unit and an output unit associated with two hydraulic connections. The drive and the output unit comprise a minimum of two cylinders, in which pistons are reciprocating. Some of the cylinders can be switched off during low wind speeds. The cylinders communicate with a low pressure manifold and a high pressure manifold. These manifolds are part of the hydraulic connections. Use of the fluid-working machine as transmission in wind energy systems increases the overall economical efficiency.
摘要:
A variable speed electric machine and a method for generating electric energy is provided. The electric machine includes an outer stator with a first set of field windings. Further, the electric machine includes a modulator outer rotor that is concentric and is located proximate to the outer stator. The modulator outer rotor is operatively coupled to an input shaft. Furthermore the electric machine includes a permanent magnet inner rotor concentric to the modulator outer rotor. The electric machine also includes an inner stator with a second set of field windings. The inner stator is concentric to the inner rotor and is operatively coupled to an electric grid. The outer stator, the modulator outer rotor, inner stator and the inner rotor are magnetically coupled with each other so as to maintain a constant electric frequency at the inner stator.
摘要:
A magnetizer including at least one reconfigurable magnetic flux guide coil is disclosed. A method of magnetizing a permanent magnet in-situ a mechanical member is also disclosed.
摘要:
A system to provide constant speed mechanical output in a wind turbine is provided. The system includes at least one electrical machine configured to convert a rotary mechanical power received from a main gear to a machine electrical power. The system further includes one or more electrical converters electrically coupled to the machine and configured to convert the machine electrical power from a direct current (DC) power to an alternate current (AC) power or from the alternate current (AC) power to the direct current (DC) power, where the converters generate a differential electrical power. A torque converter is electrically coupled to the electrical converters and generates a constant speed mechanical output employing the differential electrical power received from the one or more electrical converters.