摘要:
A wind energy system comprising a wind turbine comprising a cowling surrounded by a diffuser and a plurality of inner rotor blades located inside of the cowling that rotate about an inner hub, a plurality of outer rotor blades positioned between the diffuser and the cowling that are counter-rotating relative to the plurality of inner rotor blades, a drive mechanism located within the inner rotor hub, a dynamic telescopic tower, and a tower support that connects the wind turbine to the dynamic telescopic tower.
摘要:
Axial compactness is achieved in a generator set including an internal combustion (10) having a main shaft (16) journalled for rotation about an axis (56) and having an end (18, 54) with a flywheel (20) mounted on the end. A first rotatable magnet assembly (21) having axially facing poles is disposed on the flywheel (20) and a stator (24, 72) including generator windings (102, 104) is provided adjacent the magnets (21). A second rotatable magnet assembly (21, 22) is opposite the first magnet assembly (21) and adjacent the stator (24, 72) and has axially facing poles directed toward the poles on the first magnetic assembly (21) and is coupled to the first magnetic assembly for rotation therewith.
摘要:
The present invention provides an improved control method and apparatus allowing units arranged at different spaced apart locations to be controlled without the need for a high bandwidth link between the units and the controller. This allows a single controller to control a number of remotely located units.
摘要:
A quasi regulated electric generator, comprising a stator having teeth on an inner periphery defining slots therebetween, stator windings disposed in the slots forming output phases, a rotor rotatably mounted within the stator, the rotor having permanent magnets mounted thereon forming rotor poles which induce a voltage in the stator windings when the rotor is driven by an external prime mover, and a series saturation circuit coupled to an external source of dc current for saturating the stator, decreasing the induced voltage thereby. Magnetic slot closers are placed in the slots in which are disposed the series saturation circuit to aid tooth saturation.
摘要:
The problem of effectively and quickly detecting fault conditions in an electromotive machine (10) is solved using a current transformer assembly (28) having a neutral lead (44). The neutral lead (44) comprises a single piece copper strap (80) having laterally extending strips or posts (81-83) provided for connection to the neutral end conductors (31-33) of armature windings (22 and 24). The strap (80) is punched and bent into shape to include the three neutral posts (81-83). Each neutral post (81-83) carries a current transformer (46-48).
摘要:
The present invention relates to a turbocharger and motor assembly, in which the motor (20) is coupled to one side of the turbocharger (10) to provide additional acceleration of the turbocharger rotor (11) at low engine speeds and to reduce the power provided from the exhaust gases at higher speeds.
摘要:
A system of protection for an AC/DC hybrid electric power generation and distribution system having an AC portion comprising at least one source of AC power producing AC current coupled by first power feeders to a DC portion comprising at least one AC to DC converter producing DC current, the DC current being coupled by second power feeders to utilization equipment, comprises AC current sensors producing current sense signals proportional in magnitude to the AC current and DC current sensors producing current sense signals proportional in magnitude to the DC current. The AC current sensors define an entrance to a zone of protection, and the DC current sensors define an exit from the zone of protection. The AC and DC current sense signals are relationally compared to detect the presence of a differential current fault within the zone of protection. The protection system further discriminates the location of the fault between the AC portion and the DC portion of the hybrid power system by monitoring the ripple content in the sensed AC current. The relationship function utilized varies with the type of AC to DC conversion equipment to compensate for the power loss and transformer step up or down ratio (if used) to ensure tracking of the current level between AC current and DC output current. In addition to differential current fault protection, the instant invention detects shorted and open rectifiers, phases, and sensors.
摘要:
A synchronous permanent magnet motor is controlled independently of position sensing means by determining the system parameters including the motor impedance and back-emf and the cable impedance and supplying power according to a predefined voltage:frequency ratio which is determined based on said system parameters to provide a desired rate of acceleration determined by the supply voltage.
摘要:
An apparatus for limiting a peak voltage of a generator provides an auxiliary winding within the stationary exciter filed magnetic structure. The auxiliary winding is coupled to a controllable current source that provides a current to the auxiliary winding based upon an operating speed of the generator. The current flow is effective for moving the quiescent flux bias point of the exciter field magnetic structure for limiting the peak voltage for any operating speed of the generator.
摘要:
Losses in efficiency of operation of a dynamoelectric machine as a result of eddy current losses and poor coolant efficiency and/or disruption of the magnetic circuit in a rotor by coolant passages is avoided in a dynamoelectric machine including a stator (18) in which a rotor (16) is journaled. The rotor includes a stack (16) of thin laminations (17) made of a ferromagnetic material to define a rotor body. The rotor body includes a plurality of equally angularly spaced poles (58) separated by recesses (64). Coolant passages (76) located in the rotor at or just radially inward of the base (72) of each pole (58) and substantially radially outward of the rotational axis (56) of the rotor (14) to maximize cooling efficiency of the poles (58) without disrupting the magnetic circuit in the rotor. Slots (80) are placed in the tips (70) of the poles (58) of selected laminations (17) and extend generally radially inward to reduce eddy current losses.