Closed magnetic circuit rotor for permanent magnet generator
A permanent magnet generator and closed magnetic circuit technology, applied in the field of rotors, can solve the problems of reducing the efficiency of converting wind energy into electric energy, the proportion of leakage magnetic flux is large, and increasing energy loss, etc., to avoid overheating, avoid waste, and prevent The effect of leakage
Inactive Publication Date: 2009-11-04
BEIJING INST FOR FRONTIER SCI
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Problems solved by technology
[0004] In this technical field, the magnetic circuit structure of the permanent magnet generator can be various, but the leakage magnetic circuit is very complicated and the proportion of the leakage magnetic flux is relatively large
The magnetic flux leakage phenomenon will cause local overheating of the device, which will easily cause the aging of the device. What is more serious is that it will increase the energy loss and reduce the efficiency of converting wind energy into electrical energy, resulting in unnecessary waste of energy.
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Embodiment Construction
[0024] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0025] Such as figure 1 As shown, the rotor of the permanent magnet generator of the present invention includes a rotor frame 2 and a magnetic assembly 1 fixedly installed on the rotor frame 2 . The outer shape of the rotor is roughly cylindrical, and a central hole 12 is opened in the center thereof, and the rotor shaft can pass through the central hole 12 of the rotor. The rotor shaft can be connected to the central hole 12 of the rotor in a keyed manner through splines, flat keys, etc., so as to limit the circumferential movement of the rotor shaft in the central hole 12 of the rotor. In addition, a limiting device may also be provided on the rotor shaft to limit the axial movement of the rotor on the rotor shaft.
[0026] Multiple rotors can be arranged on the rotor shaft, and the specific number of rotors can be selected according to the...
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The invention relates to a closed magnetic circuit rotor for a permanent magnet generator, comprising a rotor support and a magnetic component which is fixedly arranged on the rotor support. The magnetic component further comprises a magnetic conductive part, two magnets which are mutually separately arranged on the upper surface of the same side of the magnetic conductive part, the magnetisms of the top surfaces of the two magnets are mutually reverse, a magnetism isolating part for blocking magnetic lines of force between the two magnets is arranged between the two magnets, the height of the magnetism isolating part is less than the height of the two magnets, a closed magnetic block is arranged between the two magnets and positioned on the magnetic isolating part, the closed magnetic block is used for closing the magnetic lines of force of the magnets, and two magnetic pole pieces for guiding and merging the magnetic lines of force are respectively positioned on the top surfaces of the two magnets. The rotor can effectively prevent the leakage of the magnetic lines of force, thereby improving the energy conversion efficiency and avoiding the unnecessary energy waste.
Description
technical field [0001] The present invention relates to a rotor, in particular to a rotor for a generator, especially to a closed magnetic circuit rotor for a permanent magnet generator. Background technique [0002] Humans have long recognized that wind energy is a renewable, non-polluting green energy source, and countries around the world have paid more and more attention to the development and utilization of wind resources. According to reports, the current global installed capacity of wind energy has exceeded 100 million kilowatts, and it is predicted that by 2020, the global installed capacity of wind energy will reach 1 billion kilowatts, accounting for 7% to 8% of the global power supply. my country's preliminarily proven wind power resources that can be developed and utilized are about 700-1200 million kilowatts of wind power, so the wind power potential that can be developed is huge, and wind power has the resource base to become an important part of the future ene...
Claims
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IPC IPC(8): H02K1/27H02K1/28H02K1/22
Inventor 毕大川陈泽森
Owner BEIJING INST FOR FRONTIER SCI