CN101106294A

CN101106294A - High-speed self started frequency conversion generator

Info

Publication number: CN101106294A
Application number: CNA2006101065935A
Authority: CN
Inventors: 万德鸿; 万红
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-16
Filing date: 2006-07-16
Publication date: 2008-01-16

Abstract

The invention relates to a high speed self-starting frequency conversion generator, which is composed of an external stator iron core (1), a concentrated winding (2) on a stator tooth, a rotor iron core (3) and a deeply buried rare earth permanent magnet body (4). In order to realize the self-starting function, the neighboring notches of the motor stator are placed with three Hall components ICs to make the motor operate in the self-starting working condition. The invention has two structures, that is, a 12-slot and 8-pole structure as well as a 6-slot and 4-pole. The permanent magnet is deeply buried into the rotor iron core so as to get a high rotation speed safety operation permanent magnet generator (10000r/min above). The air gap between the stator iron core and the stator iron core should maintain the sine magnetism dense distribution so as that the output of the generator is a sine wave electric potential. The motor is coaxially mounted with a high speed fuel oil engine. When the engine is controlled, and the rotation speed is changed, the output of the generator is capable of getting a three-phase AC V/F frequency conversion power source. In order to start the engine, the Hall signal of the generator is utilized to make the motor operate reversely in the motor working condition and to realize self-starting function. The invention is suitable for the HEV or the motorcycle.

Description

High-speed self started frequency conversion generator

Affiliated technical field

The present invention relates to a kind of high-speed self started frequency conversion generator, belong to the magneto field.

Background technology

The high-speed engine of prior art for reducing volume and size, improves the output power density of generator, and adopting rare earth permanent-magnetic material is effective way, owing to selecting for use of rare earth permanent-magnetic material, so the structure of such motor is mainly determined by motor rotor construction.Be to improve rotating speed (generally needing more than the 10000r/min), existing magneto alternator rotor structure has four kinds of tangential, radial, hybrid and axial type, all has defectives such as unreasonable structure or rotor mechanical insufficient strength.Go in the motor rotor core (permanent magnet to be inserted internal rotor, claim the deep embeded type permagnetic synchronous motor) permanent magnet is buried, install firmly than permanent magnet being attached to rotor surface, even the generator high speed rotating, permanent magnet can not fly ease yet and damage.And air gap is uniformly between the stator of prior art deep embeded type magneto alternator, rotor, causes the non-sine of air gap flux density to distribute, and makes generator output potential waveform can only be similar to sine wave; In addition, the general generator of using all can not self-starting is contrary operates under the motor working condition, is the defective that this class motor exists.

Summary of the invention

In order to overcome prior art deep embeded type permanent magnet synchronous generator, the non-sine of air gap flux density distributes, and increases the self-starting function of reversible operation under motor working condition.

The technical scheme that defective adopted that the present invention solves above-mentioned existing deep embeded type magneto alternator existence is: in the outer garden week of deep embeded type permanent magnet rotor iron core, be designed to non-positive garden shape, distribute by sinusoidal air gap flux density, it is the buried middle part of going into rotor core of permanent magnet in the air gap, and the air gap minimum between stator core, divide the both sides air gap from middle position, increase gradually by sinusoidal rule, cause air gap flux density between every permanent magnet submerged rotor core part and relative stator, all press Sine distribution; The potential waveform that obtains exporting under the generator operating mode is for sinusoidal wave; For solving the self-starting function of high-speed engine,, place three hall sensor IC in addition, operate under the motor working condition position transducer output signal of self-starting inverter as generator is contrary at the iron core notch of motor stator three phase windings.Therefore, this motor can directly produce detent torque and realizes self-starting function when feeding DC power supply.

Beneficial effect of the present invention

The invention has the beneficial effects as follows: can use on the high-speed fuel oil engine,, directly drive high-speed self started frequency conversion generator as the axle connecting mode.Because the fuel engines rotating speed can be controlled, make the voltage and the frequency of this technology generator output change (being V/F) simultaneously.Motor of the present invention has utilized the rotating speed of rare earth permanent-magnet synchronization motor this characteristics that are directly proportional with the frequency strictness, could obtain fuel engines when rotating speed changes, and generator is variable frequency power supply output, is equivalent to a frequency conversion source.Simultaneously, when fuel engines starts, can contrary operate in motor working condition again, reach self-starting function, can save the actuating motor on the former engine.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the present invention's 6 grooves 4 utmost point inner rotor motor structural representations.

Fig. 2 is 12 grooves, 8 utmost point inner rotor motor structural representations.

Fig. 3 is 12 groove stator punching figure.

Fig. 4 is 8 utmost point rotor punching figure.

In Fig. 1 and Fig. 2, the interior Zhou Weizheng garden shape multi-groove structure of external stator core 1, in turn to The outer garden of sub-iron core 3 is non-positive garden shape, causes the iron core surface gas of every deep embeded type permanent magnet 4 The close Sine distribution that is distributed as of crack magnetic; The number of coil windings 2 is counted phase with the groove of iron core 1 on the stator Deng, be centralized winding construction on each stator tooth; Epitrochanterian permanent magnet material adopts rare earth Permanent magnet rubidium iron boron (NdFeB) or samarium one cobalt (Sm-Co), epitrochanterian number of magnetic poles (forever namely The magnet block number) with cooperating of number of stator slots is: as rare-earth permanent magnet 3 (NdFeB or Sm-Co) Be 8 utmost points (8), number of stator slots is 12; When rare-earth permanent magnet 3 is 4 utmost points (4), fixed The pilot trench number is 6.

12 grooves, 8 utmost point motors and 6 grooves, 4 utmost point motors, respectively at their three adjacent notches, Place three hall position sensing element IC, as the input signal element of self-starting inverter. This is because of 12 grooves, 8 utmost point motors and 6 grooves, 4 utmost point motors, when the contrary motor working condition that operates in, Belong to the brushless electric machine principle, need by sensor element position signal to be inputed to inverter In, just can make motor start-up. The position sensor of 12 grooves, 8 utmost point motors is 30 ° of distributions (ginsengs Examine accompanying drawing 2); The position sensor of 6 grooves, 4 utmost point motors is 60 ° of distributions (with reference to the accompanying drawings 1)

Fig. 3 and Fig. 4 are 12 groove stator core stamping sheet figure and 8 utmost point rotor iron core lamination figure, and be existing Made experiment electric motor model machine (seeing photo) by this figure.

Embodiment

The experimental prototype of making according to Fig. 2 Fig. 3 and Fig. 4, stator outer diameter is 120mm, interior garden is 84mm, folded thick 50mm, the design of 12 grooves, 8 utmost points, the maximum gauge place of inner rotator is 83mm (bossings of 180 ° of symmetries), the 74mm of minimum diameter place (negative areas of 180 ° of symmetries), and permanent magnet adopts NdFeB35SH.To high speed 14600r/min scope, the potential waveform of its output all can obtain sine wave from low speed, and when as the contrary self-starting operating mode (with reference to the explanations of 3 photos) that operates in of motor, self-starting is reliable.

Deep embeded type permanent magnet (inserting the permanent magnet in the iron core fan groove) should adopt excessive dimensional tolerance to cooperate, as 4 among Fig. 2; In the small size motor was made, for preventing the leakage field influence between permanent magnet and the axle, increase by was (the seeing 5 in the accompanying drawing 2) that needs every the magnetic axis cover.

High-speed self started frequency conversion generator of the present invention, if be applied in fuel oil and the cell hybrid power electric motor car (HEV), can be this generator and the coaxial installation of high-speed fuel oil engine, Throttle Opening Control rotating speed by engine, the output voltage and the frequency of this generator are changed simultaneously, obtain the variable frequency power supply (frequency converter that is equivalent to the ABB electronic devices and components) of an output V/F three-phase alternating current sine, can directly power to the wheel hub motor on the automobile, all be suitable for for asynchronous induction type or permanent magnet synchronous type motor, at this moment just need electronic inverter, it can realize the wheel driving motor logical by the three-phase controllable silicon switch, outage control; And this HEV car can cut out fuel engines when low speed is driven a vehicle; Travel to the power supply of wheel driving motor through electronic inverter by on-vehicle battery; When two kinds of power sources are also moving, can increase the driving dynamics of automobile by two kinds of power sources of fuel electric generator and battery respectively to different wheel driving motor power supplies.

Annotate: the reference that provides simultaneously:

1. " driving motor of electric vehicle and control technology summary thereof " small and special electric machine is 2001,4,2 pages;

2. " modern magneto theoretical with design " Tang appoint far away 1997 editions, 3 pages;

3. test 31 page of attached explanations of motor photo.

Claims

1. a high-speed self started frequency conversion generator belongs to the magneto field, and it is made of external stator core and winding, internal rotor iron core and permanent magnet pole, self-starting position sensing element, it is characterized in that:

The interior Zhou Weizheng garden shape multi-groove structure of a, external stator core 1, the outer garden of internal rotor iron core 3 is a non-positive garden shape, causing the iron core surface air gap flux density of every deep embeded type permanent magnet 4 is Sine distribution;

The number of coil windings 2 equates with the groove number of iron core 1 on b, the stator, is centralized winding construction on each stator tooth;

C, when rare-earth permanent magnet 3 (NaFeB or Sm-Co) is 8 utmost points (8), number of stator slots is 12; When rare-earth permanent magnet 3 is 4 utmost points (4), number of stator slots is 6.

2. high-speed self started frequency conversion generator is characterized in that: 12 grooves, 8 utmost point motors and 6 grooves, 4 utmost point motors, at their three adjacent notches, place three hall position sensing element IC, respectively as the input signal element of self-starting inverter.