CN2165567Y

CN2165567Y - Rare-earth permanent-magnet industrial frequency electric generator

Info

Publication number: CN2165567Y
Application number: CN 93237672
Authority: CN
Inventors: 向可为
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-28
Filing date: 1993-09-28
Publication date: 1994-05-18
Anticipated expiration: 2003-09-28

Abstract

The utility model provides a rare-earth permanent-magnet industrial frequency electric generator. The rare-earth permanent-magnet industrial frequency electric generator is fixed with magnetic steel made of rare-earth Nd-Fe-B materials on a rotor, and an armature winding of the generator is provided with a plurality of taps which are connected with an AC voltage stabilizer. The output is power frequency and has the waveform of sine waves; the efficiency can reach to from 85% to 95%; the volume is small; the weight is light; the magnetic performance is high; the performance is stable; the output voltage is adjustable; an electric inverse difference device is not needed; the reliability is high; the power of the rare-earth permanent-magnet industrial frequency electric generator is arbitrary according to the power of an internal-combustion engines. The rare-earth permanent-magnet industrial frequency electric generator can be manufactured to be a single-phase type and a three-phase type; the output voltage of the single-phase type is 220V, the output voltage of the three-phase type is 380V, and the frequency is 50Hz.

Description

Rare-earth permanent-magnet industrial frequency electric generator

What the utility model related to is a kind of packaged type internal combustion engine generator group that is mainly used in--rare earth permanent magnet power frequency generator, belongs to technical field of generators.

According to industry regulation, the excitation mode of generator is divided into self-excitation, it encourages, compound excitation, induction, permanent magnetism etc., and output frequency is divided into low frequency, intermediate frequency, high frequency, power frequency etc.The generator of traditional internal combustion engine generator group mostly is the mode that adopts self-excitation, and comes control output voltage by the mode that changes exciting current, but excitation needs coiling, and consumed energy, so volume is big, complex structure, and efficient is not high.Traditional generator also has magneto, but its permanent magnetic material mostly is ferrite or aluminium nickel cobalt, and magnetic property is relatively poor, and unstable, is mainly used in low-voltage, small-power, complete to output voltage and less demanding of waveform.Also has a kind of rare earth permanent magnet intermediate frequency generator, because of the internal-combustion engine rotational speed height, the motor number of pole-pairs is many, therefore the frequency of output is an intermediate frequency, for making its frequency become power frequency, must be by electronic inverter, therefore the disadvantage of this generator is the restriction that reliability is subjected to electronic inverter, and output waveform is a square wave.

The purpose of this utility model is the problem at above-mentioned existence, proposes the rare earth permanent magnet power frequency generator of a kind of power frequency, sine wave output shape.

Technical solution of the present utility model: on rotor, be fixed with the magnet steel made from rare-earth Nd-Fe-B (NclFeB) material, on the generator armature winding, be provided with some taps, they and AC voltage regulator are joined, and output frequency is a power frequency, and output waveform is sinusoidal wave.

Accompanying drawing is the utility model structural representation.Further describe technical solution of the present utility model below in conjunction with accompanying drawing:

With the synchronous speed is 1500r/min, magnet steel outward rotation type single-phase RE permanent magnetic power frequency generator is an example, rotor yoke 1 is installed in the rotating shaft of internal combustion engine with magnet steel 2, rotate synchronously with internal combustion engine, stator core 3 is fixed on the internal combustion engine casing with armature winding 4, and tap is arranged on armature winding, connects pressurizer (AC voltage regulator of the prior art, according to the power of this generator, the AC voltage regulator that choosing is complementary).When internal combustion engine rotates, drive rotor yoke and magnet steel and rotate synchronously, so produce a rotating magnetic field,, make and produce alternating potential in the armature winding, outwards power supply by the coupling of stator core.The lower limit of armature winding tap can output rated voltage be a foundation during with the generator zero load, and the upper limit of tap can the amount of exports word voltage be a foundation with the generator full load.Like this, when load changes, when making output voltage that fluctuation take place, the sample circuit generation signal of pressurizer changes the electric heating between the tap or changes the position of tap, can make output voltage stabilization.The output frequency of generator is decided by the rotating speed of internal combustion engine, therefore on internal combustion engine, smooth rate apparatus must be installed, for making output waveform is sinusoidal wave, the source of the gas of magnet steel and stator core should be uneven, magnet steel adopts rare-earth Nd-Fe-B＜NclFeb〉material, extra high magnetic energy product of tool and coercive force.And volume is little, in light weight, efficient is high, simple in structure.

Claims

1, rare earth permanent magnet power frequency generator, it is characterized in that being fixed with the magnet steel made from rare-earth Nd-Fe-B＜NclFeB＞material on rotor, be provided with some taps on the generator armature winding, they and AC voltage regulator are joined, output frequency is a power frequency, and output waveform is sinusoidal wave.