Abstract: An electric machine includes a cylindrical stator core and a cylindrical housing having an inner diameter. The core has an outer surface and a plurality of projections extending therefrom. An outer diameter of the core measured between tips of diametrically opposing projections is greater than the inner diameter. The core is disposed in the housing with the tips engaging the inner diameter to create an interference fit between the core and housing to reduce housing resonance.

Abstract: A molded housing for a machine includes a shaft, a first region, a second region, and a third region, a first passage for the shaft and a second passage. The first passage includes a first molded edge and the second passage includes a second molded edge. The second passage includes a reinforcement element running from a first connection point connected to the second molded edge to an opposite second connection point connected to the second molded edge. The second molded edge includes a first securing device at a third connection point and a second securing device at a fourth connection point. The second passage has an opening in a wall of the molded housing and a projection of an imaginary line connecting the third connection point to the fourth connection point into the opening intersects a projection of the reinforcement element into the opening at an acute angle.

Abstract: A support system for a dynamoelectric machine is disclosed. In one embodiment, the support system includes: a mounting pad having a first face and a second face, the second face including a pair of slots; a pair of spring bars bolted to the mounting pad at the pair of slots; a collar welded or brazed to the first face of the mounting pad; and a key bar between and affixed to the pair of spring bars.

Abstract: The present disclosure relates to wind power generation systems having a segmented stator with a structural element and a plurality of coils. The wind power generation systems also include a rotor adapted to be rotated by wind to induce current in the plurality of coils and a lamination stack having a plurality of lamination plates disposed about the plurality of coils and a dovetail recess formed in the lamination stack. The wind power generation systems also include a dovetail bar adapted to be received by the dovetail recess and adjusted by a bolt to engage the lamination stack and the structural element of the segmented stator to form a torque transfer interface. Torque is adapted to be transferred from the lamination stack to the segmented stator via friction at the interface.

Abstract: A support system for a dynamoelectric machine is disclosed. In one embodiment, the support system includes: a mounting pad having a first face and a second face, the second face including a pair of slots; a pair of spring bars welded or brazed to the mounting pad at the pair of slots; a collar welded or brazed to the first face of the mounting pad; and a key bar between and affixed to the pair of spring bars.

Abstract: A keybar or clamping bolt with a high-resistivity coating to protect an electric machine. The coating engages the laminations, flanges and frame rings and forms a part of electrical circuits through which harmful eddy currents circulate. One class of eddy currents, viz., core-fault currents, due to edge burrs or insulation defects, are forced to flow through this coating. The high resistance of the coating weakens the fault currents, preventing creation of hotspots that can cause core failure. Such coated keybar is in inexpensive alternative to traditional recoating and/or core-fault detection. Another class of eddy currents, viz., keybar currents, caused by over-fluxing, are also forced to flow through this coating. The high resistance of the coating weakens the keybar currents, so prevents core-end overheating. A coated keybar also allows the machine to operate at higher leading power factor. It also prevents core-decompression hence protects the machine against loose laminations.

Abstract: A generator, a stator segment and a wind turbine are provided. The generator has a rotor and a stator. The stator includes stator segments attached to a circular holding structure. A stator segment has at least one first connection element being in engagement with at least one second connection element of the holding structure. The engagement is detachable in an axial direction and not detachable in a radial and a circumferential direction.

Abstract: An on-vehicle rotary electric machine includes a first member provided with a stator, a rotor, and a housing in which the stator and the rotor is housed, a second member adjacent to the first member in an axial direction, and a third member adjacent to the second member in the axial direction at an opposite side of the first member, and the first member, the second member, and the third member are pierced by a through bolt in the axial direction and are fixed.

Abstract: A rear frame has a fastening portion, which radially extends from an outer peripheral surface of the rear frame and receives a fastening force of a through bolt. A circuit board, which includes a control circuit, is installed to an axially outer surface of a main body of the rear frame. A reinforcing portion is provided in the fastening portion to limit deformation of the main body of the rear frame, which is induced by the fastening force of the through bolt.

Abstract: A support system for a dynamoelectric machine is disclosed. In one embodiment, the support system includes: a mounting pad having a first face and a second face, the second face including a pair of slots; a pair of spring bars welded or brazed to the mounting pad at the pair of slots; a collar welded or brazed to the first face of the mounting pad; and a key bar between and affixed to the pair of spring bars.

Abstract: A stator core suspension includes a frame for supporting a stator core; a keybar coupled to a stator core section of the stator core; and a spring bar coupled to the frame and coupled to the keybar so as to be substantially aligned radially outboard of the keybar. A spring bar used in the stator core suspension may also include a substantially uniform cross-section throughout a length thereof, which may also be rectangular or round in cross-section.

Abstract: A subscriber unit (26) contains location data that expires after predetermined time periods that are based on the subscriber's mobility. When the location data has not expired, the subscriber unit requests access (108) to a satellite communication system (10) by providing location data within an access request message. The communication system performs a quick check (214) to validate the location data. Accordingly, time-consuming geo-location procedures are avoided when a call is initiated or being received. When the location data has expired, the subscriber unit requests access (110) without providing location data within the access request message. The communication system performs a complete geolocation procedure (210) to determine valid location data for the subscriber unit. The location data is sent (211) to the subscriber unit and time stamped (113).

Abstract: An apparatus and method for torque disturbance precompensation in a disk drive spindle motor includes an amplifier for providing current to the spindle motor in response to an input signal. A velocity detector determines the velocity of the motor, which is then compared to a predetermined velocity to generate an error signal. Compensator elements of the control loop develop an actuating signal from the error signal. The actuating signal is then summed with a torque correction value provided by a look-up table. The torque correction value precompensates the motor by causing the amplifier to provide an additional incremented current to the motor. The additional current corrects the torque disturbance resulting from the movement of the heads across the disk.