CN106685166A

CN106685166A - Magnetic suspension double-faced groove disc type motor

Info

Publication number: CN106685166A
Application number: CN201510762421.2A
Authority: CN
Inventors: 周伯飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-05
Filing date: 2015-11-05
Publication date: 2017-05-17

Abstract

A flywheel energy accumulator is a novel energy storing device and is capable of converting electric energy into mechanical energy during energy storing, and then converting the mechanical energy into electric energy in use. Due to the short time for energy storing, long service lifetime and no pollution, the flywheel energy accumulator has attracted wide attentions. The most important part of the flywheel energy accumulator is the ultra high speed motor which rotates for 100,000 circles per minute. The magnetic suspension double-faced groove disc type motor is capable of generating ultra high rotation speed. A magnetic suspension bearing is the best choice since the general mechanical bearing cannot be used on the motor with such ultra high speed. The magnetic suspension double-faced groove disc type motor provided by the invention has functions of the magnetic suspension bearing and is characterized in that 1, the magnetic suspension double-faced groove disc type motor has a single stator iron core and double main magnetic pole rotors; 2, wire slots are symmetrically arranged on double faces of the stator iron core (a double-faced groove coil sheet iron core is shown in the Figure 1); 3, coils are wounded in the oppositely-faced grooves in the stator iron core in a crossing manner or spaced by a pole distance; 4, the polarity of two main magnetic poles facing the stator iron core are opposite and the motor becomes a radial magnetic suspension bearing; and 5, two pairs of ferrite permanent magnets are arranged and each pair of the magnets has the same polarity and is opposite to each other, thereby forming an axial magnetic suspension bearing.

Description

Magnetic suspension double groove disc type electric machine

This patent feature

1, single stator core, double main pole rotors；

2, stator core two sides is all arranged with wire casing (accompanying drawing 1)；

3, coil is across the pole span that is wound in stator core opposite face groove or staggers；

4, in the face of two main pole opposite polarities of stator core, motor inherently becomes radial magnetic bearing；

5, two pairs of ferrite permanent magnets, each pair of magnet same polarity is relative, forms axial magnetic suspension bearing.

Big patent CA2114230 of Ghana adopts superconducting magnetic bearing system, but, superconducting magnetic bearing system technology is sufficiently complex, and cold cooling unit investment is very high, and working service is difficult, very tight to permanent-magnet steel quality requirement, is difficult to domestic consumer and is received.

Why superconduction has so big effect.According to Theory of Electromagnetic Field, the direction of magnetic force is forever towards the direction of magnetic field energy increase.Superconductor makes the magnetic line of force linearization(-sation) that high magnetic steel is produced, and parallel to the magnet steel neutral conductor, maximizes magnetic field energy. without superconductor, permanent-magnet steel magnetic line of force linearization(-sation) is made either with or without other methods, and parallel to this steel neutral conductor, so that energy is maximum.Here it is this patent target to be reached.

Object suspends and is actually the balance of power, balances transfer and quiet two class.Object floats on the surface, and is static balance in air, and aircraft flies in the air, and The Earth Revolves round the Sun, is dynamic balancing.Magnetic suspension is also the balance of power.Several balance examples of lower surface analysis.

The first, two pieces of opposed polarities, the identical permanent-magnet steel of shape is inhaled quickly together.Because at this moment magnetic field energy is maximum, the magnetic line of force is parallel to the neutral conductor, and perpendicular to magnetic surface between magnet steel, and linearity is very good.With face also to obtaining very Quasi, this point is somewhat like superconduction body running in face.But it is just highly difficult to make magnetic suspension bearing with it, stator core is attracted by two opposite magnet steel, and the little bearing suction of air gap is big, and the big suction of air gap is little, destroys balance.

Second, two pieces of same polarities, the identical permanent-magnet steel of shape, they are repelled each other by this, used as axial magnetic suspension opposite two bearings, air gap conference diminishes, little meeting becomes big, it appears that can maintain surrounding space position, but lateral magnetic field energy increase causes side displacement, axial magnetic suspension is set to affect axial magnetic, in turn axial magnetic can affect circumferential magnetic suspension.This point is its shortcoming.Lateral displacement is overcome to be subject matter.

The third, is at the two ends of axle, one spring of each stretching, it appears that the locus of axle can be maintained, but, when axle is rotated, it is impossible to by shock mount.Only static axle is just feasible.

The content of the invention

The first scheme, there is obvious axial magnetic function, but affects axial magnetcisuspension ability." magnetic suspension double groove disc type electric machine " can solve this contradiction shown in Fig. 2.

In fig. 2, stator core (7) constitutes two-sided slot structure (Fig. 1) by rolling silicon steel sheet, and coil (6) is across being wound in opposite face groove, or the pole span that staggers.Upper, below respectively one air gap in interval and be mounted in, upper on lower rotor part (4), lower main pole (9) is relative, two main pole opposite polarities, a double groove brshless DC motor is thus formed, while and being a radial magnetic bearing

Two rotors are fixed on axle (11), and lower two main frame anode-cathode distances are constant, and two gas length summations are also constant, therefore whichever air gap occurs vibration, and magnetic field gross energy is constant, and vibration power does not interfere with axial magnetic bearing work with regard to very little.

Ferrite permanent magnet (5) and (6) same polarity are relative, form axial magnetic suspension bearing.Into circular, greatly, little rare difference, the rare swing of such rotor, magnetic field energy is constant, and oscillatory forces very little does not interfere with radial direction magnetic bearing work for magnet.

Permanent-magnet steel relative motion can produce eddy-current loss, and ferrite loss is minimum.

Fig. 1 is double groove roll film iron core, and Fig. 2 is magnetic suspension double groove disc type electric machine.

Claims

1. in fig. 2, stator core (7) constitutes two-sided slot structure (Fig. 1) by rolling silicon steel sheet, and coil (6) is across being wound in opposite face groove, but the pole span that staggers.Upper, below respectively one air gap in interval and be mounted in, upper on lower flywheel (4), lower main pole (9) is relative, two main pole opposite polarities, a double groove brshless DC motor is thus formed, while and being a radial magnetic bearing.

2. a liang rotor is fixed on axle (11), and lower two main frame anode-cathode distances are constant, and two gas length summations are also constant, therefore no matter individual air gap occurs vibration, and magnetic field gross energy is constant, and vibration power is with regard to very little.

3. ferrite permanent-magnet steel (5) and (6) same polarity are relative, form axial magnetic suspension bearing, but it is of different sizes, do not affect radial direction magnetic bearing to work.

4. permanent-magnet steel relative motion can produce vortex and damage, consumption, and ferrite loss is minimum.