Composite excited rare earth permanent magnet synchronous generator
A synchronous generator and rare earth permanent magnet technology, which is applied to synchronous motors with stationary armatures and rotating magnets, electrical components, electromechanical devices, etc., can solve the problem that the excitation magnetic field of rare earth permanent magnets cannot be adjusted and the generator maintains a constant voltage. , Difficult to popularize and apply and other problems, to achieve the effect of reasonable manufacturing process, improved reliability, simple and compact structure
Inactive Publication Date: 2004-10-27
HUNAN UNIV
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Problems solved by technology
However, the excitation magnetic field of the rare earth permanent magnet cannot be adjusted. Therefore, when the load or speed of the generator changes, it is difficult for this type of generator to maintain a constant voltage, which greatly limits its application, especially when the power supply quality is required. Difficult to popularize and apply in higher fields
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[0015] Such as figure 1 As shown, the present invention comprises a compound excitation rare earth permanent magnet synchronous generator, comprising a rotating shaft 1, an end cover 2, a casing 11, an armature winding 8, and is characterized in that the rotating shaft 1 is equipped with a rare earth permanent magnet rotor 9 for main excitation and The auxiliary electric excitation rotor for voltage regulation, the rare earth permanent magnet rotor and the auxiliary electric excitation rotor share the armature winding 8, and the generated magnetic potential is combined in parallel in the magnetic circuit.
[0016] Such as Figure 1-6 As shown, in the present invention, the auxiliary electric excitation rotor is a claw pole structure, which consists of front claws 4 and rear claws 6 with the same number of claws and half of the number of poles, and an electromagnetic coil 5 sandwiched between the two claws. Composition, the two claws are connected by non-magnetic materials, th...
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The generator includes shaft, end cover, chassis and armature winding. Character is that rotor of rare earth permanent magnet being as main excitation and rotor of assistant electricity excitation for adjusting voltage are installed on shaft. The said two rotors share armature winding. Winding of assistant electricity excitation is connected to voltage adjustment circuit. Thus, changing polarity of excitation current changes magnetic field polarity of assistant electricity excitation so as to adjust output voltage. The invention realizes brushless excitation and runs in high efficiency; and features simple compact structure, and stable voltage.
Description
Technical field: [0001] The invention belongs to generators, and in particular relates to the structural improvement of rare earth permanent magnet synchronous generators. Background technique: [0002] The motor is an electromagnetic device that converts mechanical energy and electrical energy with the electromagnetic field as a medium. In order to establish the air gap magnetic field necessary for electromechanical energy conversion in the motor, there are two methods. One is to generate a magnetic field through current in the motor windings, such as ordinary DC motors and synchronous motors. This kind of electrically excited motor not only needs special windings and corresponding devices, but also needs to continuously supply energy to maintain current flow; the other is to generate a magnetic field by a permanent magnet, which is pre-magnetized due to the inherent characteristics of the permanent magnet material. After (magnetizing), a magnetic field can be established ...
Claims
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IPC IPC(8): H02K16/02H02K21/14
Inventor 黄守道罗德荣王辉张大可肖红霞任光华
Owner HUNAN UNIV