CN201252457Y - Rare earth permanent single-phase synchronous generator with high-precision voltage stabilization - Google Patents
Rare earth permanent single-phase synchronous generator with high-precision voltage stabilization Download PDFInfo
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- CN201252457Y CN201252457Y CNU200820185537XU CN200820185537U CN201252457Y CN 201252457 Y CN201252457 Y CN 201252457Y CN U200820185537X U CNU200820185537X U CN U200820185537XU CN 200820185537 U CN200820185537 U CN 200820185537U CN 201252457 Y CN201252457 Y CN 201252457Y
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Abstract
The utility model relates to a rare earth permanent single-phase synchronous generator with high-precision voltage stabilization, which comprises a rare earth permanent rotor. The generator is characterized in that the widths of inserting slots which are arranged on an inner circle of a stator core are uniform, and the slot depths are distributed in the circumferential direction in a sine way; the inserting slot corresponding to the smallest slot depth is provided with a winding part on an outer circle of the stator core; a voltage stabilization winding is wound on a core yoke section which is arranged between the winding part and the adjacent inserting slot, wherein, the winding turn number of the voltage stabilization winding on the circumference of the stator core is symmetrical with the center of the stator core, the winding direction is uniform, thereby, a clockwise serial winding is formed; the voltage stabilization winding is connected with a voltage regulation circuit which consists of an alternating current voltage sampling circuit, a voltage comparator, a differential amplifier, a PWM pulse-width modulator and a MOSFET driving circuit. The generator solves the problem that the output voltage of the rare earth permanent generator is difficult to regulate. The generator has the advantages of high-efficiency automatic voltage stabilization effect, good sine waveform, and small regulation of static voltage, and is especially suitable for field operations.
Description
Technical field
The utility model relates to electrical generator fields, the particularly a kind of rare-earth permanent magnet brushless formula single phase synchronous generator that can realize High Precision Automatic voltage stabilizing.This generator can be driven and be formed a kind of portable power source that adapts to modern loads by dynamic power machines such as bavin gasoline engine, gas turbines, is widely used in communicating by letter, digs up mine, builds the road, many occasions such as go on a tour in forest zone, irrigation and drainage, field construction, national defence, car and boat, clan owning cars Zhou Wei, enterprises and institutions' stand-by power supply.
Background technology
Along with development of electronic technology, the application of modern loads (as the Switching Power Supply load, it is a kind of energy-efficient supply convertor, has the place of electronic load that it is just arranged) more and more widely, and is more and more higher to the quality requirements of power supply.There is following shortcoming in traditional electric excitation generator: the first, and bad because of supply waveform, harmonic content is up to 25%, and the incompatibility modern loads have the electric excitation generator supply waveform of short-circuited winding to make moderate progress and design, but loss is big; The second, because the relation of structure and magnetic Circuit Design a little less than the ability of band inductive load, generally only can drive the inductive load about seventy percent; The 3rd, because of all relatively large with iron amount and copper consumption, copper loss can iron loss can be bigger, add the high iron loss of harmonic content again and further increase, in addition, again because the electric energy 10% of generator output is used for excitation own to 15%, so loss is big, efficient is low; The 4th, traditional brushless generator is connected to rotating rectifier, and rectifying tube is fragile, and has the brush generator amature to have machinery to electrically contact with slip ring power supply and wear and tear, and magnet excitation state electronic circuit very easily damages, so the failure rate height.Existing popular rare earth permanent-magnetic generator quiescent voltage regulation height generally all more than 6%, guarantees by this body structure, can not automatic Regulation, bring harm to power consumption equipment easily.Though and the composite excitation rare earth permanent-magnetic generator can pressure regulation, complex structure, volume is big, cost is high, so the market competitiveness is poor.
Summary of the invention
The purpose of this utility model is fundamentally to solve difficult this difficult problem of regulating of rare earth permanent-magnetic generator output voltage, thereby can be under the prerequisite that does not increase the rare earth permanent-magnetic generator volume and weight, obtain a kind ofly have High Precision Automatic voltage regulation result, and sinusoidal waveform is good, the quiescent voltage regulation is very little, simple in structure and rare-earth permanent-magnet single-phase synchronous generator that cost is low.
For achieving the above object, the technical solution adopted in the utility model is: a kind of high accuracy voltage stabilizing rare-earth permanent-magnet single-phase synchronous generator, comprise rare earth permanent magnet formula rotor, stator core and single-phase of generating electricity winding, and its innovation is:
Described stator core is along the circumferential direction offered several line embedding grooves on interior circle, the groove width unanimity of several line embedding grooves, and the groove depth size distributes by sinusoidal rule at the circumferencial direction of stator core, pairing line embedding groove groove depth maximum when promptly Shu Chu sinusoidal voltage is in crest and trough, and sinusoidal voltage pairing line embedding groove groove depth minimum when being in zero crossing, the groove depth size changes by sinusoidal rule at circumferencial direction; Line embedding groove position corresponding to the groove depth minimum is provided with the winding section on the cylindrical of stator core, this winding section is made of excision face on the stator core cylindrical or winding slot, and the winding section is with stator core center of circle symmetric arrangement;
Described single-phase of generating electricity winding is embedded in the line embedding groove of circle in stator core, and wherein, the coiling number of turn of single-phase of generating electricity winding on the stator core circumference is with stator core center of circle symmetry; Have a voltage stabilizing winding between winding section and contiguous line embedding groove around the coiling of stator core yoke section, wherein, the coiling number of turn of voltage stabilizing winding on the stator core circumference is with stator core center of circle symmetry, coiling direction unanimity forms the winding of forward connecting;
Have a regulating circuit to be connected with described voltage stabilizing winding, this regulating circuit is made up of alternating voltage sample circuit, voltage comparator, difference amplifier, PWM pulse width modulator and MOSFET drive circuit; The alternating voltage sample circuit is made of the resistance series connection bleeder circuit that connects single-phase of generating electricity winding or independent sampling winding, take out the input that ac voltage signal connects voltage comparator from dividing point, the given reference voltage signal of another input termination of voltage comparator, the input of the output termination difference amplifier of voltage comparator, the input of the output termination PWM pulse width modulator of difference amplifier, the control end of the output termination MOSFET drive circuit of PWM pulse width modulator, the output termination voltage stabilizing winding of MOSFET drive circuit.
Related content in the technique scheme is explained as follows:
1, in the such scheme, described " rare earth permanent magnet formula rotor " is meant that the rotor of generator adopts the structure and the form of rare earth permanent magnet formula.This part content is a prior art, such as adopting general built-in structure of magnet or surperficial tile-shaped magnet structure etc.
2, in the such scheme, described line embedding groove and winding section are with respect to the oblique setting of axis stator.
Because the technique scheme utilization, the utility model compared with prior art has following advantage:
1, the utility model utilizes the superpower magnetic of rare earth magnetic steel to make rotor, under the condition of identical power output, lacks 25% than electric excitation generator with the iron amount, copper consumption few 55%.
2, the power factor of the utility model generator reaches more than 0.9 near 1, the ability 100% of starting inductive load, and the ability that overloads under the situation that prime mover can bear reaches 2 times.
3, the utility model generator output voltage harmonic content is about 2%, and voltage fluctuation rate is less than 0.5%, and sinusoidal waveform is good.
4, the utility model generator steady state voltage regulation is 2%, and the transient voltage regulation is less than 15%.
5, the utility model generator automatic voltage regulator (regulating circuit) is operated in the little electric current of volt level low-voltage person of outstanding talent's peace level, adapts to long time continuous working, long service life.
6, the utility model generator adopts rare earth permanent magnet formula rotor, because the magnetic of rare earth magnetic steel is very strong and constant, rotor does not need to be provided with excitation winding, and the volume of generator, weight are all greatly reduced, and is particularly suitable for many occasion uses such as field work.
7, the utility model electric generator structure is simple, and cost is low, belongs to the non-maintaining type machine.
Description of drawings
Accompanying drawing 1 is the utility model embodiment stator silicon steel sheet plane graph;
Accompanying drawing 2 is that the utility model embodiment stator core and winding are arranged schematic diagram;
Accompanying drawing 3 is superpose in the alternating magnetic fields closed-loop path schematic diagram of D.C. magnetic field of the utility model;
Accompanying drawing 4 is the utility model embodiment winding connection figure;
Accompanying drawing 5 is the utility model industrial frequency AC output automatic Regulation theory diagram.
In the above accompanying drawing: 1, stator core; 2, rare earth permanent magnet formula rotor; 3, welding groove; 4, single-phase of generating electricity winding; 5, voltage stabilizing winding; 6, other winding; 7, line embedding groove; 8, winding section; 9, stator silicon steel sheet; A, Circular Winding; B, Circular Winding.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: a kind of high accuracy voltage stabilizing rare-earth permanent-magnet single-phase synchronous generator
This generator is made up of stator and rotor two parts.Rotor is a rare earth permanent magnet formula rotor 2, and this rare earth permanent magnet formula rotor 2 adopts common built-in structure of magnet or surperficial tile-shaped magnet structure in the prior art.Because of the former cost is low, present embodiment adopt the former (this generator amature with two very example).Technical measures of the present invention all concentrate in the improvement to generator unit stator.Stator is made up of stator core 1, single-phase of generating electricity winding 4, voltage stabilizing winding 5, other winding 6 and regulating circuit.
As shown in Figure 1, from the stator silicon steel sheet 9 as can be seen, stator core 1 is along the circumferential direction offered 32 line embedding grooves 7 (representing with 1c～32c) in Fig. 1 on interior circle, the groove width unanimity of these 32 line embedding grooves 7, and the groove depth size distributes by sinusoidal rule at the circumferencial direction of stator core 1, pairing line embedding groove 7 groove depth maximums when promptly Shu Chu sinusoidal voltage is in crest and trough, and sinusoidal voltage pairing line embedding groove 7 groove depth minimums when being in zero crossing, the groove depth size changes by sinusoidal rule at circumferencial direction.All these 32 line embedding grooves 7 also all are the following symmetry of benchmark (seeing shown in Figure 1) with the horizontal center line all being the benchmark left-right symmetric with the vertical center line aspect shape and the sectional area size.Line embedding groove 7 positions corresponding to the groove depth minimum are provided with winding section 8 on the cylindrical of stator core 1, this winding section 8 is made of the excision face on stator core 1 cylindrical (also can be designed to the winding slot structure, do not draw among the figure, such as rectangular channel, half slot, dovetail groove or V-shaped groove etc.), there are two places winding section 8 and are that benchmark is symmetrically arranged with the vertical center line of stator core 1 in Fig. 1.It should be noted that this winding section 8 must be that benchmark is provided with and use in pairs with stator core 1 center of circle, every pair is symmetry with stator core 1 center of circle.In addition, on cylindrical, also be provided with welding groove 3, stator silicon steel sheet 9 connected into integral body by welding groove 3 for each stator silicon steel sheet 9 is assembled into stator core 1.Described line embedding groove 7 and winding section 8 be not with respect to the oblique setting of axis stator (providing diagram).Line embedding groove 7 and winding section 8 all will and 1 of stator core carry out insulation processing, two end faces of stator core 1 also will carry out insulation processing.
As shown in Figure 2, voltage stabilizing winding 5 forward is composed in series by Circular Winding A and Circular Winding B.Wherein, Circular Winding A winding section 8a and contiguous line embedding groove 7 29c number between the 32c groove around stator core 1 yoke section coiling; Circular Winding B winding section 8b and contiguous line embedding groove 7 13c number between the 16c groove around stator core 1 yoke section coiling.On stator core 1 circumference, the coiling number of turn of Circular Winding A and the coiling number of turn of Circular Winding B are symmetry with stator core 1 center of circle, and Circular Winding A is consistent with the coiling direction of Circular Winding B relative stator iron core 1, form the forward voltage stabilizing winding 5 of series connection with this.Single-phase of generating electricity winding 4 is arranged in 1c number to 12c number of line embedding groove 7 and 17c number to the 28c groove, and wherein, the groove depth of line embedding groove 7 is big, and promptly sectional area is big, and the number of turn that is embedded is many, and opposite groove depth is little, and promptly sectional area is little, and the number of turn that is embedded is few.Because the groove depth size changes by sinusoidal rule at circumferencial direction, therefore make the number of turn in each line embedding groove 7 at circumferencial direction to change by sinusoidal rule substantially.The coiling number of turn of single-phase of generating electricity winding 4 on stator core 1 circumference is with stator core 1 center of circle symmetry.Other winding 6 can be sampling winding, storage battery charging winding or other winding (present embodiment is an alternating voltage sampling winding) that need set up for control, is arranged in 13c number of line embedding groove 7 and 16c number and 29c number and the 32c groove.
Because rare earth permanent magnet formula rotor 2 is provided with by the two poles of the earth, stator core 1 is corresponding to taking 135 degree facies tracts in a utmost point 180 degree, and promptly single-phase of generating electricity winding 4 takies 12 grooves in 16 line embedding grooves 7, and two utmost points take 7, two of 24 line embedding grooves symmetry extremely fully.Locate the line embedding grooves 7 of symmetrical 45 degree in the facies tracts near the horizontal center line two ends, shallow and sectional area is distributed to other winding 6, Circular Winding A and Circular Winding B for a short time because of groove.Circular Winding A and the Circular Winding B number of turn in line embedding groove 7 is distributed must be according to following principle: with the vertical center line left-right symmetric, symmetrical up and down with horizontal center line, promptly the number of turn in 13c groove, 16c groove, 29c groove and the 32c groove of line embedding groove 7 is identical.In like manner, the number of turn in 14c groove, 15c groove, 30c groove and the 31c groove is identical.Since Circular Winding A and Circular Winding B number of turn symmetry, coiling direction unanimity, and forward series connection, and therefore the alternating electromotive force that produces under the effect of iron core yoke portion alternating flux is cancelled each other.
As shown in Figure 4, ST represents power frequency single-phase of generating electricity winding 4.MN represents other winding 6 (present embodiment is an alternating voltage sampling winding).EF represents voltage stabilizing winding 5.
As shown in Figure 5, a voltage stabilizing winding 5 and a regulating circuit are connected to form industrial frequency AC output automatic Regulation.This regulating circuit is made up of alternating voltage sample circuit, voltage comparator, difference amplifier, PWM pulse width modulator and MOSFET drive circuit.The alternating voltage sample circuit constitutes (also can connect the sampling of resistance series connection bleeder circuit from single-phase of generating electricity winding 4) by the resistance series connection bleeder circuit that connects other winding 6 (alternating voltage sampling winding), take out the input that ac voltage signal connects voltage comparator from dividing point, the given reference voltage signal of another input termination of voltage comparator, the input of the output termination difference amplifier of voltage comparator, the input of the output termination PWM pulse width modulator of difference amplifier, the control end of the output termination MOSFET drive circuit of PWM pulse width modulator, the output termination voltage stabilizing winding of MOSFET drive circuit.
As shown in Figure 3, the utility model automatic voltage is regulated (automatic voltage regulation) principle: extremely strong and unadjustable this extreme physical characteristic based on rotor rare-earth Nd-Fe-B magnetic, designed voluntarily by around the voltage stabilizing winding of stator core 1 yoke section coiling and the block type adjuster that regulating circuit connects and composes.According to the principles of electric and electronic engineering and referring to Fig. 3, in the alternating magnetic fields closed-loop path, the stack D.C. magnetic field, then the magnetic resistance of alternating magnetic field (title dynamic magnetic resistance) increases, dynamic magnetic resistance changes with the size of D.C. magnetic field, dynamic magnetic resistance becomes greatly thereupon when D.C. magnetic field becomes big, and dynamic magnetic resistance diminishes thereupon when D.C. magnetic field diminishes.As can be seen from Figure 3, when voltage stabilizing winding 5 flows through direct current, produce D.C. magnetic field, the direction of this D.C. magnetic field is opposite with the magnetic direction that the diagram left side is provided by rotor, offset a part of magnetic field intensity, and identical with the diagram right side by the magnetic direction that rotor provides, because iron core has reached the magnetic saturation state, therefore do not increase magnetic flux, so just weaken magnetic field intensity on the whole.Itself can not regulate the magnetic of rotor rare earth magnetic steel, and the dynamic magnetic resistance in the stator yoke that constitutes rare earth magnetic steel dynamic magnetic field loop can be regulated by the stack D.C. magnetic field, and the size of change D.C. magnetic field can be regulated the dynamic magnetic resistance in the stator yoke.
When the power frequency ac voltage of single-phase of generating electricity winding output exceeds rated value, the alternating voltage sample circuit detects voltage and raises, and lift-off value delivered to voltage comparator and given reference voltage signal subtracts each other, the difference that draws is delivered to difference amplifier, it is that the main PWM pulse width modulator of forming (PWM wave producer) carries out logic and data operation that amplifying signal is delivered to again by integrated chip, the PWM ripple that generation changes synchronously with the industrial frequency AC output voltage, go to trigger the power amplifier that is driven by MOSFET, amplified current is presented to the voltage stabilizing winding.The D.C. magnetic field that the voltage stabilizing winding produces increases the dynamic magnetic resistance in the iron core yoke, so the power frequency output voltage descends.When the industrial frequency AC output voltage arrived rated value, the electric current in the voltage stabilizing winding was zero, and D.C. magnetic field disappears, and at this moment, generator moves under natural characteristic.
The utility model block type adjuster be one from inside to outside, closed-loop regulating system from outside to inside again, adjustment process is exceedingly fast, the steady state voltage regulation that can guarantee this generator is about 2%, add the very capable of the anti-armature reaction of rare earth magnetic steel, main winding turn ratio electric excitation generator is a lot of less, and conductor cross-section increases relatively, so the transient voltage regulation of this generator is more much smaller than electric excitation generator.
The foregoing description only for explanation technical conceive of the present utility model and characteristics, can not limit protection range of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the present utility model.
Claims (2)
1, a kind of high accuracy voltage stabilizing rare-earth permanent-magnet single-phase synchronous generator comprises rare earth permanent magnet formula rotor, stator core and single-phase of generating electricity winding, it is characterized in that:
Described stator core is along the circumferential direction offered several line embedding grooves on interior circle, the groove width unanimity of several line embedding grooves, and the groove depth size distributes by sinusoidal rule at the circumferencial direction of stator core, pairing line embedding groove groove depth maximum when promptly Shu Chu sinusoidal voltage is in crest and trough, and sinusoidal voltage pairing line embedding groove groove depth minimum when being in zero crossing, the groove depth size changes by sinusoidal rule at circumferencial direction; Line embedding groove position corresponding to the groove depth minimum is provided with the winding section on the cylindrical of stator core, this winding section is made of excision face on the stator core cylindrical or winding slot, and the winding section is with stator core center of circle symmetric arrangement;
Described single-phase of generating electricity winding is embedded in the line embedding groove of circle in stator core, and wherein, the coiling number of turn of single-phase of generating electricity winding on the stator core circumference is with stator core center of circle symmetry; Have a voltage stabilizing winding between winding section and contiguous line embedding groove around the coiling of stator core yoke section, wherein, the coiling number of turn of voltage stabilizing winding on the stator core circumference is with stator core center of circle symmetry, coiling direction unanimity forms the winding of forward connecting;
Have a regulating circuit to be connected with described voltage stabilizing winding, this regulating circuit is made up of alternating voltage sample circuit, voltage comparator, difference amplifier, PWM pulse width modulator and MOSFET drive circuit; The alternating voltage sample circuit is made of the resistance series connection bleeder circuit that connects single-phase of generating electricity winding or independent sampling winding, take out the input that ac voltage signal connects voltage comparator from dividing point, the given reference voltage signal of another input termination of voltage comparator, the input of the output termination difference amplifier of voltage comparator, the input of the output termination PWM pulse width modulator of difference amplifier, the control end of the output termination MOSFET drive circuit of PWM pulse width modulator, the output termination voltage stabilizing winding of MOSFET drive circuit.
2, high accuracy voltage stabilizing rare-earth permanent-magnet single-phase synchronous generator according to claim 1, it is characterized in that: described line embedding groove and winding section are with respect to the oblique setting of axis stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820185537XU CN201252457Y (en) | 2008-09-09 | 2008-09-09 | Rare earth permanent single-phase synchronous generator with high-precision voltage stabilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820185537XU CN201252457Y (en) | 2008-09-09 | 2008-09-09 | Rare earth permanent single-phase synchronous generator with high-precision voltage stabilization |
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| CN201252457Y true CN201252457Y (en) | 2009-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU200820185537XU Expired - Fee Related CN201252457Y (en) | 2008-09-09 | 2008-09-09 | Rare earth permanent single-phase synchronous generator with high-precision voltage stabilization |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103376053A (en) * | 2012-04-12 | 2013-10-30 | 株式会社捷太格特 | Resolver |
| CN108683275A (en) * | 2018-05-29 | 2018-10-19 | 杭州精导智能科技有限公司 | Direct driving motor |
| CN110190687A (en) * | 2019-07-05 | 2019-08-30 | 江西科技师范大学 | It is a kind of to prevent horizontal type generator from touching the stator core stamping sheet to rub |
-
2008
- 2008-09-09 CN CNU200820185537XU patent/CN201252457Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103376053A (en) * | 2012-04-12 | 2013-10-30 | 株式会社捷太格特 | Resolver |
| CN108683275A (en) * | 2018-05-29 | 2018-10-19 | 杭州精导智能科技有限公司 | Direct driving motor |
| CN110190687A (en) * | 2019-07-05 | 2019-08-30 | 江西科技师范大学 | It is a kind of to prevent horizontal type generator from touching the stator core stamping sheet to rub |
| CN110190687B (en) * | 2019-07-05 | 2024-03-15 | 江西科技师范大学 | Stator core punching sheet for preventing horizontal generator from rubbing |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20150909 |
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| EXPY | Termination of patent right or utility model |