Abstract: An ultrasonic flowmeter configured to detect impurities in a fluid, such as impurities in water. The flowmeter sends an ultrasonic signal through a flow tube and measures a deviation in a measured travel speed, which corresponds to a concentration of a measured impurity. The flow tube of the flowmeter can either have a straight configuration or a u-shaped configuration.

Abstract: A method for assembling a direct drive generator assembly includes the steps of placing a rotor over a stator, leaving a gap therebetween. A magnetic hub is assembled using adjacent columns of magnets having opposed orientation, and placed in the air gap. Application of an input torque to generate cogging torque in first direction that offsets coggery torque in second direction.

Abstract: A method for assembling a direct drive generator assembly includes the steps of placing a rotor over a stator, leaving a gap therebetween. A magnetic hub is assembled using adjacent columns of magnets having opposed orientation, and placed in the air gap. Application of an input torque to generate cogging torque in first direction that offsets coggery torque in second direction.

Abstract: A direct-drive generator and assembly procedure for that generator include a permanent magnet assembly that is partitioned and assembled piece-by-piece after the rotor and stator have been attached. The magnets are attached to a plate in columns, and adjacent columns have a N-S orientation. The air gap between the rotor and stator is variable, and application of an input torque produces a first cogging torque in a first direction due to the variable air gap that offsets a second cogging torque in a second opposite direction.

Abstract: The invention is a generator and cooling mechanism. The generator includes a rotor comprising a shaft with a skewed alignment of magnets on a ring, a stator of toothed laminations with coils wound around the teeth, and a housing with cooling chambers. The housing has annular subchambers arranged successively along the length of the generator in such a way that cooling fluid must flow to the opposite side of the generator to pass into the next chamber. Because the housing is highly heat conductive, this structure of annular subchambers increases the uniformity of the fluid temperature.

Abstract: The present invention is a slow-speed, large-scale generator and assembly procedure for that generator. The magnet is partitioned and assembled piece-by-piece after the rotor and stator have been attached. Guides are used to arrange the magnets so as to give skew to the overall magnet assembly. The shoes of the teeth of the stator have subteeth. The generator is located in the middle of the height of the tower, rather than at the top. The invention makes manufacturing easier and has reduced cogging torque, making large-scale, slow-speed operation more feasible. The efficiency and thus reduced weight of the direct-drive allows the device to be located such that a tower can be smaller and easier to construct and have fewer components.

Abstract: The invention is a generator and cooling mechanism. The generator includes a rotor comprising a shaft with a skewed alignment of magnets on a ring, a stator of toothed laminations with coils wound around the teeth, and a housing with cooling chambers. The housing has annular subchambers arranged successively along the length of the generator in such a way that cooling fluid must flow to the opposite side of the generator to pass into the next chamber. Because the housing is highly heat conductive, this structure of annular subchambers increases the uniformity of the fluid temperature.

Abstract: The present invention is an integrated brushless permanent-magnet motor with the circuit board controller in the same chamber as the rotor and stator. Including the circuit board controller in the same chamber as the rotor and stator allows for a more compact motor. The motor may include fins on its housing exterior such that the heat generated by the motor flows out of the housing through the fins, cooling the motor. The invention may also include features designed to reduce cogging.

Abstract: Provided is a stator for a motor including a plurality of spokes wound with wire before assembly of the stator. The spokes are engaged with an inner and outer stator frame, and a stator housing is mounted over the outer stator frame. Also provided is a method for production of a stator for a motor including providing a plurality of spokes and winding each spoke individually with a wire. The spokes are then inserted into an inner stator frame and attached to an outer stator frame.

Abstract: This application relates to an improved motor for pumping fluid. The motor is improved by integrating a fluid pumping means within a rotor structure. Particularly, the laminations of a rotor are skewed into a fan or spiraling configuration. The rotor rotates in response to electromagnetic flux produced by a stator. During rotation the skewed rotor generate a propulsive force. When fluid is introduced to the skewed rotor, the propulsive force carries the fluid through the motor. A conduit is provided for directing at least some of the fluid flow.

Abstract: A contact enforcement apparatus for an electric switch includes two electro-magnetic bars. The first electro-magnetic bar is disposed between a crossbar of the switch and a moveable contact arm. The crossbar carries the moveable contact arm and the first electro-magnetic bar such that the electrical contacts of a stationary contact arm and the moveable contact arm are opened and closed by the crossbar. The second electro-magnetic bar is in U-shape and has a front wall and a back wall, between which the moveable contact arm is at least partially inserted when the electrical contacts are closed together. When a "fault" current passes by the electrical contacts, an attractive force between the electro-magnetic bars is largely increased. This attractive force overcomes a repulsive force caused by the "fault" current which tends to open up the electrical contacts, so that the contact between the moveable and stationary contacts remain closed.

Abstract: An improved salient pole configuration for a dynamoelectric machine is disclosed, particularly for a permanent magnet brushless DC motor wherein cogging torque is a problem. One or more apertures or "reluctance holes" are disposed within the head portion of the salient poles in the stator such that the reluctance holes are substantially adjacent but not adjoining the pole face, thereby forming a bridge between the aperture and the pole face. The reluctance hole bridge provides a substantially constant air gap flux density to reduce cogging, while at the same time, provides a low reluctance shunt path for the armature reaction flux around the permanent magnet to improve the demagnetization margin. The efficiency of the machine is also improved.