摘要:
A system for generating power comprising, a superconducting generator including, an armature assembly comprising, a body portion, a tooth portion having a front surface and a rear surface, a slot partially defined by the body portion and the tooth portion, an armature bar engaging the slot, and a cooling cavity partially defined by the tooth portion, communicative with the front surface and the rear surface.
摘要:
A magnetizer for magnetizing permanent magnets positioned in-situ a mechanical member is disclosed. The magnetizer comprises at least one primary superconducting coil configured to project a magnetic field flux configuration of a first type to at least a portion of a distal volume of a first type, and at least two auxiliary coils symmetrically disposed about the at least one primary superconducting coil and configured to project magnetic field flux configurations of a second type to at least a portion of a distal volume of a second type. A method of magnetizing a permanent magnet in-situ within a mechanical member is also disclosed.
摘要:
A system for controlling torque ripple in a permanent magnet synchronous machine includes a power converter configured to be coupled to the permanent magnet synchronous machine and to receive converter control signals and a system controller coupled to the power converter. The system controller includes a fundamental current controller configured for providing fundamental voltage commands, a harmonic current controller configured for using harmonic current commands, current feedback signals from the permanent magnet machine, and fundamental current commands in combination with positive and negative sequence regulators to obtain harmonic voltage commands, and summation elements configured for adding the fundamental voltage commands and the harmonic voltage commands to obtain the converter control signals.
摘要:
A system for protecting superconducting generator field coils including a controller configured to monitor for a quenching of a superconducting field coil of a generator and control a dissipation of a current flow in the superconducting field coil in an event of the quenching, and an armature coil of the generator configured to cause the dissipation of the current flow in the superconducting field coil responsive to the controller in the event of the quenching of the superconducting field coil. A method for protecting superconducting generator field coils including monitoring for a quenching of a superconducting field coil of a generator, and dissipating a current flow in the superconducting field coil via an armature coil of the generator in response to a detection of the quenching.
摘要:
A human-powered generator system for electric watercycles with a control means whereby the perceived mechanical properties of the pedal mechanism and electric pedal-powered generator are adjustable by the operator. The invention provides a means whereby the rotational inertia and damping of the input pedal mechanism, including generator, as perceived by the operator can be increased or decreased as desired. The control means with further properties such that the input pedal mechanism as perceived by the operator can be made to mimic that of bicycle; i.e., with large inertia when pedaling in the forward direction, a very low inertia when pedaling in the reverse direction, and a freewheeling clutch mechanism whereby the large inertia is disengaged when not pedaling in the forward direction with a forward torque. The control means further enable the electric watercycle to be perceived as coasting through the water when the operator takes a momentary break from pedaling, much like that of a bicycle coasting.
摘要:
An axial flux machine includes a rotatable shaft; at least one rotor disk coupled to the rotatable shaft; at least one permanent magnet supported by the at least one rotor disk; at least one stator extension positioned in parallel with the at least one rotor disk; at least two molded iron pole elements attached to the at least one stator extension and facing the at least one permanent magnet; and at least two electrical coils, each wrapped around a respective one of the at least two molded iron pole elements.
摘要:
An electrical machine is provided. The electrical machine includes a rotor comprising an inner rotor having a plurality of inner rotor poles and an outer rotor having a plurality of outer rotor poles. The electrical machine further comprises a stator configured to modulate a magnetic flux and to transmit torque to inner rotor and the outer rotor, the stator comprising a stator core interposed concentrically between the inner rotor and the outer rotor; a multiple of stator windings disposed in a plurality of stator slots, the stator windings configured to form a multiple of stator poles. The stator further comprises a plurality of stator teeth interposed between the plurality of stator slots, wherein an arithmetic sum or difference of twice number of stator teeth and a number of the stator poles equals a number of rotor poles.
摘要:
A magnetizer for magnetizing permanent magnets positioned in-situ a mechanical member is disclosed. The magnetizer comprises at least one primary superconducting coil configured to project a magnetic field flux configuration of a first type to at least a portion of a distal volume of a first type, and at least two auxiliary coils symmetrically disposed about the at least one primary superconducting coil and configured to project magnetic field flux configurations of a second type to at least a portion of a distal volume of a second type. A method of magnetizing a permanent magnet in-situ within a mechanical member is also disclosed.
摘要:
An electrical machine includes a rotor with an inner rotor portion and an outer rotor portion, and a double-sided yokeless stator. The yokeless stator includes modular lamination stacks and is configured for radial magnetic flux flow. The double-sided yokeless stator is concentrically disposed between the inner rotor portion and the outer rotor portion of the electrical machine. Examples of particularly useful embodiments for the electrical machine include wind turbine generators, ship propulsion motors, switch reluctance machines and double-sided synchronous machines.
摘要:
A rotor structure for an interior permanent magnet (IPM) electromotive machine is provided. The rotor structure includes at least one rotor lamination including a first group of slots and a second group of slots arranged to form a magnetic pole. The first group of slots may be arranged to form a magnetic flux along a direct axis of the magnetic pole resulting from the first and second group of slots. At least some of the first group of slots is arranged to receive a respective permanent magnet. The second group of slots is arranged to provide a separation for the magnetic flux from adjacent magnetic poles and lying along a quadrature axis of said magnetic pole. At least some of the second group of slots is arranged without a permanent magnet. The rotor structure further includes a magneto-mechanical barrier arranged to reduce a peak level of mechanical stress occurring by the first and/or the second group of slots and/or impede a flow of magnetic flux through the barrier.