摘要:
On a stator core (3), there are wound primary generating windings (W U ,W V ,W W ) of four (4) poles with a distributed full-pitch winding structure and stator excitation windings (W e ) with a concentrated full-pitch winding structure, having the number of poles odd-number times the number of poles of the primary generating windings, that is, twelve (12) poles. The primary windings appropriately produce spatial higher harmonic components of the armature reaction magnetic fields. The excitation windings are connected to the center taps (u,v,w) of the primary windings through a control rectifier (5). On a rotor core (7), six field windings (W f1 - W f6 ) of four poles. The field windings are arranged at positions where they are magnetically coupled with both static magnetic fields produced by the stator excitation windings and odd-order spatial higher harmonic components of armature reaction magnetic fields produced by the currents (I₁,I₂,I₃) in the primary generating windings. The field windings are short-circuited by the diodes (D₁,D₂,D₃,D₄,D₅,D₆), respectively. In the brushless self-excited synchronous generator, the number of slots in each of the rotor and stator can be determined irrespective of the order number of the spatial higher harmonic components of the armature reaction magnetic fields. The generator is simple and rigid in its structure.
摘要:
Rotor windings (33,34) are wound on two salient pole type rotor cores (31,32), respectively, and the rotor windings on the salient poles adjacent to each other on the axial direction are connected in series. Diodes (35) are connected in parallel between the series connection nodes of the rotor windings. A plurality of rotor conductors (36,37) are provided on the periphery of and extending through the two rotor cores. Two stators (21,22) and two DC magnetic excitation windings (41,41) are provided surroundingly to face the two rotor cores. Number of poles of the stator is the same as that of the rotor core, and number of poles of the DC excitation windings is different from that of the rotor core. A voltage phase shifter (25) is provided to one of the two stators, which selectively produces a phase difference of 0° or 180° between two rotating magnetic fields produced around the two salient pole type rotor cores. The motor starts and accelerates according to the principle of an induction motor under the phase difference of 0° and, when the rotational speed of the motor approaches the synchronous speed, the motor is pulled into the synchronous operation by having the phase difference switched to 180° and having the DC magnetic excitation windings operated. Alternating voltages induced in the rotor windings by the static magnetic fields of the DC excitation windings are rectified by the diodes, and magnetic poles are formed on the two salient pole type rotor cores. The motor produces a large starting torque since it starts in the same principle as that of the conventional induction motor and, therefore, it does not require any such special starting means as a starter. During the synchronous operation, since the rotor windings function as field windings, the motor produces a large torque and does not require maintenance such as for brushes.
摘要:
On a stator core (3), there are wound primary generating windings (W U ,W V ,W W ) of four (4) poles with a distributed full-pitch winding structure and stator excitation windings (W e ) with a concentrated full-pitch winding structure, having the number of poles odd-number times the number of poles of the primary generating windings, that is, twelve (12) poles. The primary windings appropriately produce spatial higher harmonic components of the armature reaction magnetic fields. The excitation windings are connected to the center taps (u,v,w) of the primary windings through a control rectifier (5). On a rotor core (7), six field windings (W f1 - W f6 ) of four poles. The field windings are arranged at positions where they are magnetically coupled with both static magnetic fields produced by the stator excitation windings and odd-order spatial higher harmonic components of armature reaction magnetic fields produced by the currents (I₁,I₂,I₃) in the primary generating windings. The field windings are short-circuited by the diodes (D₁,D₂,D₃,D₄,D₅,D₆), respectively. In the brushless self-excited synchronous generator, the number of slots in each of the rotor and stator can be determined irrespective of the order number of the spatial higher harmonic components of the armature reaction magnetic fields. The generator is simple and rigid in its structure.
摘要:
Rotor windings (33,34) are wound on two salient pole type rotor cores (31,32), respectively, and the rotor windings on the salient poles adjacent to each other on the axial direction are connected in series. Diodes (35) are connected in parallel between the series connection nodes of the rotor windings. A plurality of rotor conductors (36,37) are provided on the periphery of and extending through the two rotor cores. Two stators (21,22) and two DC magnetic excitation windings (41,41) are provided surroundingly to face the two rotor cores. Number of poles of the stator is the same as that of the rotor core, and number of poles of the DC excitation windings is different from that of the rotor core. A voltage phase shifter (25) is provided to one of the two stators, which selectively produces a phase difference of 0° or 180° between two rotating magnetic fields produced around the two salient pole type rotor cores. The motor starts and accelerates according to the principle of an induction motor under the phase difference of 0° and, when the rotational speed of the motor approaches the synchronous speed, the motor is pulled into the synchronous operation by having the phase difference switched to 180° and having the DC magnetic excitation windings operated. Alternating voltages induced in the rotor windings by the static magnetic fields of the DC excitation windings are rectified by the diodes, and magnetic poles are formed on the two salient pole type rotor cores. The motor produces a large starting torque since it starts in the same principle as that of the conventional induction motor and, therefore, it does not require any such special starting means as a starter. During the synchronous operation, since the rotor windings function as field windings, the motor produces a large torque and does not require maintenance such as for brushes.
摘要:
A brushless three-phase synchronous generator (70) includes a stator (41) having primary generating windings (42) and stator excitation windings (43) whose number of poles is odd-number times the number of poles of the primary generating windings. The generator further includes a cylindrical rotor (60) on which a plurality of field windings (50) are wound in a full-pitch concentrated winding form. The plurality of field windings (50) are respectively shortcircuited by the corresponding diodes (D11 - D19). A plurality of field windings (W f51 ,W f57 ) in which voltages of the same phase are induced based on the odd-order spatial higher harmonic magnetic fields are connected in parallel and further connected in parallel to the central field windings (W f54 ) which effectively produce primary field magnetic fluxes. A circulating rectifier element (D14) is connected in parallel to the central field windings. Improvement in the waveforms of the primary magnetic fields can be achieved and self-excitation in the case where the single-phase loads are connected can be prevented from occurring while magnetic coupling of the rotor field windings to the spatial higher harmonic components of the armature reaction magnetic fields is effectively maintained well.