A circuit board is in the shape of a strip and includes: in one longitudinal end portion thereof, power connection portions connected to an external power supply; in another longitudinal end portion thereof, land portions to which portions of conducting wires drawn out downwardly of a base portion are connected; and pattern portions electrically connected to the power connection portions and the land portions. The land portions include a first land portion, and a second land portion arranged adjacent to the first land portion. The pattern portions include a first pattern portion electrically connected to the first land portion, and a second pattern portion arranged adjacent to the first pattern portion, and electrically connected to the second land portion. The first pattern portion and the second land portion are arranged to overlap with each other when viewed in a widthwise direction of the circuit board. Alternatively or additionally, the first and second land portions are arranged to overlap with each other when viewed in a longitudinal direction of the circuit board.

The present invention relates to a vehicle supercharger assembly (14) comprising a generator comprising a first armature (14) being adapted for permanent drive from a source of motive power; a supercharger impeller (24) arranged to be driven via a gear train; an electric motor comprising a second armature (28), said second armature (28) being coupled to the gear train; a first clutch (32) for selectively coupling the first armature (14) to the gear train for driving the supercharger impeller (24) in a first mode of operation in which the electric motor is operable to adjust the speed of the supercharger impeller (24); and a second clutch (34), operable when said first armature (14) is coupled to the gear train, for selectively locking the gear train so as to prevent relative rotation of the first and second armatures in a second mode of operation.

The present invention relates to a vehicle supercharger assembly (14) comprising a generator comprising a first armature (14) being adapted for permanent drive from a source of motive power; a supercharger impeller (24) arranged to be driven via a gear train; an electric motor comprising a second armature (28), said second armature (28) being coupled to the gear train; a first clutch (32) for selectively coupling the first armature (14) to the gear train for driving the supercharger impeller (24) in a first mode of operation in which the electric motor is operable to adjust the speed of the supercharger impeller (24); and a second clutch (34), operable when said first armature (14) is coupled to the gear train, for selectively locking the gear train so as to prevent relative rotation of the first and second armatures in a second mode of operation.

A magnetic voltage/current limiting system is mounted in conjunction with a main coil, in a coil assembly of a wind turbine generator, for limiting the outputted voltage (or current) to a predetermined upper value. The limiting system generally has at least one limiting coil and a control circuit connected to the main coil. The limiting system is configured to be activated when the voltage (or current) outputted by the main coil increases beyond the predetermined upper value. Once activated, the limiting system diverts a portion of the outputted current to the limiting coil such as to generate a magnetic field in the limiting coil. This additional magnetic field generally limits the amount magnetic field generated by passing magnets to flow through the main coil, thereby limiting the outputted voltage.

A detection sensor including an alternating current (AC) permanent magnet synchronous motor (PMSM) housed in a casing, a motherboard and an AC servo controller with a permanent memory in electronic communication with the PMSM, and a shaft extending from the PMSM configured to rotate a sensing needle wherein the sensing needle is configured to sense an object in its rotation.

A rotor temperature monitoring method and system for a permanent magnet synchronous motor are provided. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current; further, a line voltage between the a-phase and the b-phase of the stator is obtained and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained; and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor.

A permanent magnet excited electric machine includes a stator and a moving part movable relative to the stator. One of the stator and moving part has an electric winding system in the form of a single or multiple 3-phase system. The other one of the stator and moving part has permanent magnets. The winding system, in the form of a delta connection, has an inductance such that the related total reactance x.sub.B during rated operation according to x.sub.B=ω.sub.B.Math.L.sub.Y.Math.P.sub.B/(Z.sub.3P.Math.U.sub.i,B.sup.2) is at least 0.8, wherein ω.sub.B is the electric angular frequency of the winding system during rated operation, L.sub.Y is the phase inductance of the winding system in star connection, P.sub.B is the power of the machine during rated operation, Z.sub.3P is the number of 3-phase systems of the machine, and U.sub.i,B is the amount of the induced conductor voltage during rated operation.

A permanent magnet excited electric machine includes a stator and a moving part movable relative to the stator. One of the stator and moving part has an electric winding system in the form of a single or multiple 3-phase system. The other one of the stator and moving part has permanent magnets. The winding system, in the form of a delta connection, has an inductance such that the related total reactance x.sub.B during rated operation according to x.sub.B=ω.sub.B.Math.L.sub.Y.Math.P.sub.B/(Z.sub.3P.Math.U.sub.i,B.sup.2) is at least 0.8, wherein ω.sub.B is the electric angular frequency of the winding system during rated operation, L.sub.Y is the phase inductance of the winding system in star connection, P.sub.B is the power of the machine during rated operation, Z.sub.3P is the number of 3-phase systems of the machine, and U.sub.i,B is the amount of the induced conductor voltage during rated operation.

A hybrid excitation rotating electrical machine configured with a rotor having a shaft extended on at least one side in an axial direction, and first and second cores that are separated in the axial direction with a gap between the cores. First magnetic poles that are excited by a permanent magnet and second magnetic poles that are not excited by the permanent magnet are alternately arranged in a circumferential direction in each of the first and second cores. The first magnetic poles of the first core have a different polarity from that of the first magnetic poles of the second core, and the first magnetic poles of one of the first and second cores are placed so as to face the second magnetic poles of the other of the first and second cores in the axial direction with the gap between the magnetic poles.

A short pitched switched reluctance motor control apparatus comprising a voltage provider comprising a first coupling and a second coupling configured to be coupled to a phase winding of the switched reluctance motor for applying a voltage to drive current in the winding between the first and second coupling is disclosed. The apparatus further comprises a controller configured to apply a first voltage pulse to the first coupling, and to apply a second voltage pulse to the second coupling, wherein the start of the second pulse is delayed with respect to the start of the first pulse, and the end of the first pulse is delayed with respect to the end of the second pulse.