High frequency coupling excitation automobile generator

An automobile generator and high-frequency coupling technology, which is applied to synchronous generators, control generators and electrical components through magnetic field changes, and can solve problems such as increasing the heat generation of generators, large volume, and poor low-speed charging performance

Inactive Publication Date: 2008-07-30
王铁夫
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Problems solved by technology

But it is precisely because of the existence of these two additional air gaps that the volume of the excitation current and the excitation coil will also increase due to the increase in the magnetic pressure drop compared with the brushed generator. It is slightly larger and its low-speed charging performance is worse than that of a brushed generator
Moreover, the incr

Method used

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  • High frequency coupling excitation automobile generator
  • High frequency coupling excitation automobile generator
  • High frequency coupling excitation automobile generator

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Embodiment Construction

[0008] Its implementation mode is further described below in conjunction with accompanying drawings.

[0009] 1 in Figure 1-1 is a ring-shaped magnetic conductor made of high-frequency magnetic material, and its shape is shown in Figure 1-2. The magnetic ring is placed on the shaft of the generator rotor, and a buffer sleeve of plastic material is used between the magnetic ring and the shaft to fix the magnetic ring and the shaft together. A coil 3 is wound on the magnetic ring, and wires 9 at both ends of the coil are drawn out from one side of the magnetic ring. When the rotor rotates, the magnetic ring rotates with the shaft simultaneously with the coil 3 on it. 4 in the figure is a coil sheathed on the outside of the coil 3, and a strip-shaped magnetizer 2 of the same material as the magnetic ring is arranged above and below the coil 4, and its shape is shown in Fig. 1-3. These two magnetic strips and the coil 4 are made integrally to be enclosed within the outside of th...

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Abstract

The invention relates to an automobile generator which utilizes isolated coupling of a high-frequency transformer to realize brushless excitation, and represents a combination of the modern switch power technology and the motor technology. High-frequency current is coupled to a secondary coil rotating together with a rotor through a fixed primary coil, and the high-frequency current provides power for an exciting coil in the rotor after rectifying and wave-filtering. The simple and efficient excitation not only brings the advantage of a brushless generator to the invention, but also enables the invention to maintain the advantages of low speed, good charging performance and simple structure in a brush generator; in addition, the invention has more stable voltage output. By adopting the technology of the invention, a regular brush automobile generator can be improved into such a brushless generator through simple changes.

Description

[0001] Field: [0002] The invention belongs to the technical field of motors, in particular to an automobile generator which utilizes isolation coupling of a high-frequency transformer to realize brushless excitation. Background technique: [0003] Automobile generators can be divided into two types: brushed and brushless. Brushless generators have greatly improved reliability due to overcoming many disadvantages caused by brushes. At present, the most popular structure of the excitation magnetic circuit of the brushless automobile generator is to add two additional air gaps in the magnetic circuit, and the magnetic field is transmitted through these two additional air gaps. But it is precisely because of the existence of these two additional air gaps that the volume of the excitation current and the excitation coil will also increase due to the increase in the magnetic pressure drop compared with the brushed generator. In addition to being slightly larger, its low-speed cha...

Claims

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Application Information

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IPC IPC(8): H02K11/00H02K19/36H02P9/30H02K11/042
Inventor 王铁夫
Owner 王铁夫
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