一种具有低电压调整率的永磁发电机转子结构
By adopting a rotor structure with a composite excitation method in a permanent magnet generator, combined with a trapezoidal air slot design, the problems of high voltage regulation and low mechanical strength are solved, achieving the effect of low voltage regulation and high mechanical strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG JINGJIU TECH CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing permanent magnet generators have high voltage regulation rates when the load changes, which affects the normal operation of the load. In addition, the existing rotor structure is complex and has low mechanical strength.
The rotor structure, which adopts a composite excitation method, includes a rotor core, tangential permanent magnets and radial permanent magnets, which are fastened into a whole by screws and nuts. The trapezoidal air slot design is combined to reduce magnetic leakage and heat dissipation. The distance between the rotor pole arc surface and the inner wall of the stator is controlled between 2 and 3.
It significantly reduces the voltage regulation rate of the generator to 0.95%, has a simple structure, high mechanical strength, high material utilization, and good heat dissipation.
Smart Images
Figure CN224520790U_ABST
Abstract
Claims
1. A permanent magnet generator rotor structure with low voltage regulation, comprising a rotor core (1), tangential permanent magnets (2), radial permanent magnets (3), a motor shaft (4), a core riveting hole (5) and a rotor pole arc (6), characterized in that, The rotor core (1) consists of a set of laminations (1a), each lamination (1a) having a riveting hole (5). A screw (1b) is inserted into the riveting hole (5), and the set of laminations (1a) is fastened together as a whole by the screw (1b) and nut (1c) in a threaded engagement to form the rotor core (1). The rotor core (1) has a through hole (11) in the middle, and the motor shaft (4) passes through and is fixedly connected in the through hole (11); The rotor core (1) has a rotor pole arc surface (6) on its side. When installed, the rotor core (1) is inside the stator (12). The ratio of the maximum distance between the rotor pole arc surface (6) and the inner wall of the stator (12) to the minimum distance between the rotor pole arc surface (6) and the inner wall of the stator (12) is between 2 and 3.
2. A permanent magnet generator rotor structure having a low voltage regulation according to claim 1 characterised in that: The rotor core (1) is provided with a circumferentially evenly arranged mounting slot 1 (9) and mounting slot 2 (10). The mounting slot 1 (9) and mounting slot 2 (10) are spaced apart from each other. A tangential permanent magnet (2) is fixedly installed in each mounting slot 1 (9), and a radial permanent magnet (3) is fixedly installed in each mounting slot 2 (10). The magnetic poles of two adjacent tangential permanent magnets (2) are opposite, and the magnetic poles of two adjacent radial permanent magnets (3) are opposite.
3. A permanent magnet generator rotor structure having a low voltage regulation according to claim 2 characterised in that: The gap formed between the end of the mounting groove (9) and one side of the tangential permanent magnet (2) is a trapezoidal air groove (7), which is used to reduce rotor leakage magnetism and facilitate heat dissipation.
4. The permanent magnet generator rotor structure having a low voltage regulation according to claim 1, characterized in that: The thickness of the tangential permanent magnet (2) is 1.7 to 2.3 times that of the radial permanent magnet (3).
5. The permanent magnet generator rotor structure with low voltage regulation rate according to claim 1, characterized in that: The laminations are made of silicon steel or low-carbon steel.