CN100426656C - Permanent-magnet DC brushless variable speed constant-pressure wind power generator and its voltage stabilization method - Google Patents
Permanent-magnet DC brushless variable speed constant-pressure wind power generator and its voltage stabilization method Download PDFInfo
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Abstract
The present invention relates to a DC brushless speed-change constant-voltage wind power generator of a permanent magnetism type and a voltage stabilizing method thereof. The generator is driven by a speed-change wind wheel, and generated constant-voltage DC electricity is transmitted to an electric network after the frequency of the DC electricity is changed by an inverter. When the work rotating speed of the generator is maximum, the per unit X<*> of the electric leakage reactance of an armature winding is equal to the ratio of the difference of the maximum work rotating speed and the minimum work rotating speed of the generator and the minimum work rotating speed. The value range of the per unit X<*> is from 0.1 to 1.7. The method uses the optimal electromagnetic design of the generator for increasing the value of the electric leakage inductance of the armature winding of the generator so as to improve the electric leakage inductance reactance of the armature winding when the generator works; thus, when the rotating speed of the generator is changed in the range of work rotating speeds, the electric potential E of the generator and the voltage decrease X. I of the electric leakage reactance of the armature winding are synchronously changed in an equal-quantity mode so as to realize constant-voltage output. The generator can realize the voltage stabilization without a detecting or controlling step, an executing mechanism, etc. The structure is greatly simplified, and the cost is greatly reduced. The present invention is simple, economical, effective and reliable.
Description
Technical field:
The present invention relates to a kind of generator, relate in particular to a kind of permanent-magnet DC brushless variable speed constant-pressure wind power generator and method for stabilizing voltage thereof that drives by the speed change wind wheel.
Background technology:
The grid type wind-driven generator is the mechanical energy that wind wheel is caught to be converted into electric energy and to be transported in constant voltage, the constant frequency electrical network to go.When the high-power electric and electronic technology was not mature enough, frequency, voltage that the change generator sends wind-powered electricity generation were very difficult.In order to be delivered directly to wind-powered electricity generation in the electrical network, only select alternating current asynchronous generator or synchronous alternating-current generator for use with the electrical network same frequency.Asynchronous generator can only operate in above 1%～4% left and right sides speed discrepancy scope of synchronous speed, and synchronous generator can only operate in synchronous speed.In order to make generator frequency be fit to electrical network, must be connected with the constant speed wind wheel with the gear box of big gear ratio, the frequency of rotating speed, wind-powered electricity generation and the electrical network of wind wheel and generator all is complementary.The advantage of these two kinds of motors is directly to be incorporated into the power networks without inversion, but has many deficiencies: 1, the power-rotary speed property of motor is harder, is difficult for mating well with the output characteristic curve of wind wheel, also is difficult to improve capturing wind energy efficient to absorb wind energy to greatest extent; 2, when being incorporated into the power networks, easily unit and electrical network are impacted; 3, owing to the unsteadiness of wind speed, easily gear box is produced impact and makes gear box damage the maintenance cost height; 4, generator will often be in shutdown, low speed generating, the frequent input of generating electricity at a high speed, cut out state, and control is complicated, easy break-down; 5, generator no-load loss when hanging down load is bigger, efficient when being difficult to improve underloading, and high efficient area is little, and can only be driven by the lower constant speed wind wheel of average seizure wind energy efficiency.For synchronous generator, a cover field power supply and a control system thereof need be arranged also.Therefore both efficient was not high enough for this electricity generating plan, and was extremely uneconomical; Complex structure has increased production cost again.
Catch the efficient of wind energy in order to improve wind wheel, consider,, can design the speed change wind wheel that almost under all wind regime, all has the higher-energy conversion efficiency by optimizing from the aerodynamics angle.Test shows that when mean wind speed 6.7m/s, the speed change wind wheel is than the wind energy of the constant speed wind wheel seizure of Duoing 15%.Along with the development of power electronic technology, the high power AC converter technique is applied, and the voltage stabilizing of high-power wind turbine and frequency conversion are incorporated into the power networks and can be realized, so the frequency of wind speed round and rotation speed change and electrical network does not have inevitable direct relation.For this reason, each manufacturer develops the novel wind-driven generator that is driven by the speed change wind wheel again in the world, E-30 that V66 wind energy conversion system of producing as Vestas company and Enercon company produce and E-66/1.8 wind-driven generator etc.The V66 wind energy conversion system can make it be in optimum state all the time according to wind regime control slurry elongation, thereby has improved energy output, and system noise is also controlled.Wind wheel power is delivered to double-fed asynchronous generator by gear box and coupling.This unit has adopted the optimum speed control technology that is called VCS (Vestas Converter System), can guarantee the stable electrical power of unit output.VCS is by the asynchronous generator with wound rotor and slip ring, adopts power inverter, contactor and the protective device of IGBT (insulated gate transistor) switch to form by one.VCS can make the running speed excursion reach 60% of rated speed.With the VCS technology is that the double-fed asynchronous generator of representative can be converted into electric energy to the wind energy that the speed change wind wheel is caught as much as possible, increases energy output, keeps the low noise operation, reduce gear box load, but its weak point is: rotor has slip ring, and complex structure is difficult to save gear box and directly drives operation.
Wind-driven generators such as E-30 that Enercon company produces and E-66/1.8 all adopt and directly drive speed change electricity excitation synchronous generator, this generator is by adjusting the purpose that exciting current reaches speed change voltage stabilizing output, realize rectification, the inversion grid connection of AC-DC-AC by heavy-duty rectifier, inverter, though brought into play the advantage of speed change wind wheel, but it must have slip ring and excitation system, complex structure is produced and the operating cost height.
In addition, State Intellectual Property Office's disclosed CN1649239 application for a patent for invention on August 3rd, 2005, a kind of " the MW level directly drives the permanent-magnetic outer rotor synchro wind generator " disclosed, the excitation system of described generator is a permanent magnet, and directly drive external rotor, saved structures such as the excitation system of electric excitation synchronous generator and slip ring.But this patent discloses the voltage regulation way before variable speed permanent magnetism generator electric energy is not incorporated into the power networks.
For realizing the voltage stabilizing output of permanent magnet generator, some solutions have been proposed in the prior art.As disclosed No. 95111026.8 applications for a patent for invention in State Intellectual Property Office's on October 30th, 1996, a kind of voltage stabilization permanent magneto generator and method for stabilizing voltage thereof are disclosed.Described generator comprises stator, rotor, worm-and-wheel gear, actuating motor and sampling control circuit, rotor is connected with the output shaft of engine, the sampling control circuit is connected with the generator voltage output, actuating motor is connected with the sampling control circuit, actuating motor drives a rhizoid thick stick by worm-and-wheel gear and does axial motion, and an end and the stator of this leading screw fix.Its method for stabilizing voltage is to adjust the relative position of generator amature, stator by control circuit and pressure regulation actuator according to load variations, thereby changes the magnetic field couple state between stator and rotor, realizes voltage stabilizing output.The shortcoming of this method is: 1, owing to need set up sampling control circuit and many equipment such as pressure regulation actuator, actuating motor, control system and mechanical structure are all comparatively complicated, have improved production cost greatly; 2, because it has complicated pressure regulation actuator, be difficult in high-rating generator (for example MW class wind turbine) and go up application (because if high-rating generator adopts this method pressure regulation, pressure regulation actuator will be very huge, textural anomaly is heavy, is difficult to realize).In addition, on September 11st, 1999, Granted publication 95239710.2 utility model patents also disclosed a kind of voltage stabilization permanent magneto generator, and described generator has and the similar structure of aforementioned patent, adopts the realization voltage stabilizing that uses the same method; Disclosed CN1262547 application for a patent for invention on August 9th, 2000, a kind of permanent magnet generator method for stabilizing output voltage and voltage stabilization permanent magneto generator are disclosed, it is by being arranged on the acting in conjunction of back-moving spring, balancing spring and spring adjusting nut on the same axis, thereby the relative shift of regulating between stator and the rotor is realized voltage stabilizing, and the essence of its method for stabilizing voltage is identical with aforementioned patent.Therefore all there are above-mentioned many deficiencies in the disclosed method for stabilizing voltage of these patents.
Summary of the invention:
One of the technical problem to be solved in the present invention is, provide a kind of simple, economical, effectively, the method for stabilizing voltage of permanent-magnet DC brushless variable speed constant-pressure wind power generator reliably.
Another technical problem that the present invention will solve is, according to specified criteria, provide a kind of need that generator is optimized Electromagnetic Design, determine specific armature winding leakage inductance value, need not to increase any optional equipment or control circuit and can realize the permanent-magnet DC brushless variable speed constant-pressure wind power generator that constant voltage is exported by the motor natural characteristic.
Method for stabilizing voltage according to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention, this generator is driven by the speed change wind wheel, the constant voltage direct current that sends transfers to electrical network after the inverter frequency conversion, this generator is armature winding leakage reactance perunit value X when the maximum functional rotating speed
*Equal the difference of generator maximum, minimum working speed and the ratio of minimum working speed, its value scope is 0.1 to 1.7, this method is by generator itself is optimized Electromagnetic Design, increase the leakage inductance value of the armature winding of this generator, thereby the leakage inductance reactance of the armature winding when increasing generator work, make when the rotating speed of this generator changes in its working speed scope, the leakage reactance pressure drop XI equivalent of the electromotive force E of generator and armature winding, variation synchronously, thus realize constant voltage output.
As a kind of specific embodiments of said method, the degree of depth that makes its storage tank that is used for ccontaining winding when designing the described armature core of this generator and the ratio of width were greater than 6: 1.
As a kind of preferred embodiment of said method, the degree of depth that makes described storage tank when designing the described armature core of this generator and the ratio of width were greater than 8: 1.A kind of preferred scheme is, the degree of depth that makes described storage tank when designing the described armature core of this generator is 10: 1 to 16: 1 with the ratio of width.
As the further measure of said method, select the slot wedge of magnetic conductor for use as the described armature winding of sealing, with the leakage inductance value of the described armature winding of further increase,, thereby obtain required leakage inductance reactance.
According to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention, drive by the speed change wind wheel, the constant voltage direct current that sends transfers to electrical network after the inverter frequency conversion, described generator comprises: a stator, comprise armature core, be installed on the winding in the described armature core and be used to install the iron core installing rack of described armature core: a rotor, be rotatably installed on the described stator, drive rotation by described speed change wind wheel, the magnetic pole fixed mount that it comprises permanent magnetism magnetic pole and is used to install described permanent magnetism magnetic pole; One heterogeneous full-wave rectifier connects the output of described winding, and it exports described inverter to after with current commutates again; Be formed with the multiple tracks storage tank on the described armature core, described winding is installed in the described storage tank, and the ratio of the degree of depth of described storage tank and width was greater than 6: 1.
Also have following attached technical characterictic according to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention:
In a kind of preferred embodiment that the present invention provides, the ratio of the degree of depth of described storage tank and width was greater than 8: 1; A kind of preferred scheme is that the degree of depth of described storage tank is 10: 1 to 16: 1 with the ratio of width.
The slot wedge of installing in the described storage tank is a magnetic conductor, and it is closed in described winding in the described storage tank.
As a kind of by way of example of above-mentioned preferred embodiment, described generator is the outward rotation type generator, and described stator also comprises a fixed axis, and described iron core installing rack is fixed on the described fixed axis; Described magnetic pole fixed mount is made up of casing and the end cap that is installed on the casing two ends, and described permanent magnetism magnetic pole is fixed in the inboard of described casing, and described two end cap is installed on the described fixed axis by two rolling bearings.The middle part of described two end cap is formed with two annular flange flange that extend internally, and described rolling bearing is located between described annular flange flange and the described fixed axis.Described permanent magnetism magnetic pole adheres to the inner surface of described casing by adhesive.
As the another kind of by way of example of above-mentioned preferred embodiment, described generator is interior rotary type generator, and described rotor also comprises a rotating shaft, and described magnetic pole fixed mount is fixed on the described rotating shaft; Described iron core installing rack is made up of casing and the end cap that is installed on described casing two ends, and described armature core is fixed in the inboard of described casing; Described two end cap is installed on the described rotating shaft by two rolling bearings.The middle part of described two end cap is formed with two annular flange flange that extend internally, and described rolling bearing is located between described annular flange flange and the described rotating shaft.Described permanent magnetism magnetic pole adheres to the periphery of described magnetic pole fixed mount by adhesive.
According to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention and method for stabilizing voltage thereof, because only by increasing dark, the wide leakage inductance reactance that recently increases winding of winding storage tank on the armature core, and rationally utilized the removal of magnetic property of armature reaction, thereby the realization voltage stabilizing, and guaranteed its voltage regulation result.Compared with prior art, on the one hand, this parameter of electric machine of determining by the optimization Electromagnetic Design is fully realized the generator of voltage stabilizing, do not need to increase any detection, controlling unit and actuator etc., not only structure is greatly simplified, cost reduces greatly, and efficient and reliability improve greatly, and is highly suitable for being similar on this high-rating generator of wind-driven generator; On the other hand, overcome technology prejudice of the prior art.In the prior art, during the design generator,, improve the stability of generator output voltage when load variations, generally all will make great efforts to reduce the leakage inductance reactance of winding for efficient and the power factor that improves generator.And invention thinking of the present invention is just opposite with it---by increasing the constant voltage output that the leakage inductance reactance realizes permanent-magnet variable-speed constant-voltage generator.Therefore not only realized tremendous technological break-through, reached the purpose of permanent-magnet variable-speed constant-voltage output with motor nature output characteristic at high-power DC brushless generator speed constant pressure output facet; And this novel unique design thought also provides more wide thinking to those of ordinary skill in the art to the voltage stabilizing of permanent magnet generator research and development.
According to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention, can realize directly coupling coupling with the output characteristic of speed change wind wheel, the running speed excursion is wide, and excursion maximum, minimum working speed can reach 70% of maximum functional rotating speed.Both kept the high efficiency of permanent magnet generator, light, advantages of simple structure and simple, and can realize voltage stabilizing automatically again under speed change varying load situation, the constant voltage direct current that it sends only needs can be incorporated into the power networks through inversion.Reduced a large amount of electromechanics in the system and detected and adjusting device, not only simple in structure, reduce cost, also improved operational reliability.
According to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention, the input-output characteristic that can realize self between speed change wind wheel and inverter mates with the input characteristics Automatic Optimal of speed change wind wheel output characteristic and inverter respectively, automatically choose optimal working point by its natural output characteristic, eliminated mechanical shock and the electrical impact process in the system, prolong the service life of generator, saved operating cost.
According to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention, owing to realize speed constant pressure output automatically, do not need chopper control by its natural output characteristic, so harmonic component is little, only there is the rectification harmonic wave, no copped wave harmonic wave before the inversion.After if some typhoon power generator group direct current energies compile in the wind energy turbine set again inversion transport to electrical network, not only DC power supply is compiled conveniently, and can eliminate most of harmonic wave after the complementation of rectification harmonic wave, reduces the harmonic pollution to electrical network.
Description of drawings:
The present invention is described in detail below in conjunction with preferred embodiment that accompanying drawing provides, wherein:
Fig. 1 is the application principle schematic diagram according to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention;
Fig. 2 is for partly cuing open schematic diagram according to outward rotation type permanent magnet DC brushless variable speed constant-pressure wind power generator provided by the invention;
Fig. 3 is the floor map of the armature stamping of outward rotation type permanent magnet DC brushless variable speed constant-pressure wind power generator shown in Figure 2;
Fig. 4 is for partly cuing open schematic diagram according to inward rotation type permanent magnet DC brushless variable speed constant-pressure wind power generator provided by the invention;
Fig. 5 is the floor map of the armature stamping of inward rotation type permanent magnet DC brushless variable speed constant-pressure wind power generator shown in Figure 4.
Embodiment:
Method for stabilizing voltage according to permanent-magnet DC brushless variable speed constant-pressure wind power generator provided by the invention, this generator is driven by the speed change wind wheel, the constant voltage direct current that sends transfers to electrical network after the inverter frequency conversion, this method is by generator itself is optimized Electromagnetic Design, increase the leakage inductance value of the armature winding of this generator, thereby the leakage inductance reactance of the armature winding when increasing generator work, make when the rotating speed of this generator changes in its working speed scope, the leakage reactance pressure drop XI equivalent of the electromotive force E of generator and armature winding, change synchronously, thereby realize constant voltage output.The perunit value X of armature winding leakage reactance when this method can be applicable to the maximum functional rotating speed
*Be that (generator is armature winding leakage reactance perunit value X when maximum speed for 0.1 to 1.7 generator
*Equal the difference of generator maximum, minimum working speed and the ratio of minimum working speed).
According to the Electrical Motor theory, permanent-magnet DC brushless variable speed constant-pressure wind power generator is in the working speed scope, under the situation of ignoring the armature internal resistance, can equivalence become one to be proportional to electromotive force E and power supply that equivalent reactance pressure drop XI forms that rotation speed n changes, its expression formula be U=f (n) ≈ E-XI, and wherein U is a generator output voltage, X is an armature equivalence leakage reactance, I is an equivalent current, equivalent leakage reactance X=2 π fL, and L is equivalent leakage inductance.Method of the present invention is according to above-mentioned expression formula, by generator is carried out Electromagnetic Design, determine suitable reactance X, realize the constant of output voltage U under the speed change by the synchronous variation of reactance pressure drop XI and generator electromotive force E, concrete measure is: dark, the wide ratio by increasing the storage tank that is used for ccontaining winding in the described armature core or adopt the magnetic slot-seal of suitable thickness to obtain the suitable leakage inductance L value of armature winding, make armature winding leakage reactance X (X=2 π fL) can satisfy leakage reactance pressure drop XI and electromotive force E equivalent, change synchronously, thereby realize voltage stabilizing.
As a kind of specific embodiments of said method, the degree of depth that makes its storage tank that is used for ccontaining winding when designing the described armature core of this generator and the ratio of width were greater than 6: 1.
As a kind of preferred embodiment of said method, the degree of depth that makes described storage tank when designing the described armature core of this generator and the ratio of width were greater than 8: 1.A kind of preferred scheme is, the degree of depth that makes described storage tank when designing the described armature core of this generator is 10: 1 to 16: 1 with the ratio of width.As the further measure of said method, select the slot wedge of magnetic conductor simultaneously for use, with the leakage inductance value of the described armature winding of further increase as the described armature winding of sealing.
The generator Structure that is used to implement above-mentioned method for stabilizing voltage sees for details following.
Referring to Fig. 1, according to permanent-magnet DC brushless variable speed constant-pressure wind power generator 10 provided by the invention, it is driven by the speed change wind wheel, and the constant voltage direct current that sends transfers to electrical network 30 after inverter 20 frequency conversions.The concrete structure of speed change wind wheel and inverter and be all known technology with being connected of generator 10, mounting means and structure etc. repeats no more herein.
Referring to Fig. 2, described generator 10 comprises:
One stator 1 comprises armature core 11, is installed on the winding 12 in the described armature core 11 and is used to install the iron core installing rack 13 of described armature core 11;
One rotor 2 is rotatably installed on the described stator 1, drives rotation by described speed change wind wheel, the magnetic pole fixed mount 22 that it comprises permanent magnetism magnetic pole 21 and is used to install described permanent magnetism magnetic pole 21;
One heterogeneous full-wave rectifier 3 connects the output of described winding 12, and it exports described inverter 20 to after with current commutates again;
Described armature core 11 is overrided to form by the multi-disc armature stamping, referring to Fig. 3, there is shown the floor map of every armature stamping, be formed with multiple tracks storage tank 111 on the described armature core 11, described winding 12 is installed in the described storage tank 111, the invention is characterized in, the ratio of the degree of depth of described storage tank 111 and width was greater than 6: 1, the leakage inductance reactance of armature winding 12 of the present invention increases greatly, and utilizes this principle (seeing for details following) to realize voltage stabilizing.
Referring to Fig. 3, as the further improvement to said structure, the slot wedge of installing in the described storage tank 111 14 is a magnetic conductor, and it is closed in described winding 12 in the described storage tank 111.Select magnetic conductor can further increase the leakage inductance value of winding 12 as slot wedge.Thereby realize voltage stabilizing better.
In a kind of preferred embodiment that the present invention provides, the ratio of the degree of depth of described storage tank 111 and width was greater than 8: 1, and the generating function that the depth-to-width ratio of storage tank is positioned at the armature core of this scope realizes voltage stabilizing better; As another preferred embodiment of the present invention, the degree of depth of described storage tank 111 is 10: 1 to 16: 1 with the ratio of width.The armature core that the depth-to-width ratio of storage tank is positioned at this scope more is applicable to the wind-driven generator that slewing range is bigger.
Referring to Fig. 2 and 3, in a kind of specific embodiments of the present invention, described generator 10 is the outward rotation type generator, and described stator 1 also comprises a fixed axis 15, and described iron core installing rack 13 is fixed on the described fixed axis 15; Described magnetic pole fixed mount 22 is made up of casing 221 and the end cap 222 that is installed on casing 221 two ends, and described permanent magnetism magnetic pole 21 is fixed in the inboard of described casing 221, and described two end cap 222 is installed on the described fixed axis 15 by two rolling bearings 4.The middle part of described two end cap 222 is formed with two annular flange flange that extend internally 223, and described rolling bearing 4 is located between described annular flange flange 223 and the described fixed axis 15.The structure of described annular flange flange 223 can make things convenient for the installation of described rolling bearing 4 greatly.Described permanent magnetism magnetic pole 21 adheres to the inner surface of described casing 221 by adhesive, and is therefore easy for installation, reduced production cost.The generator of this structure, speed change wind wheel (not shown) directly or by another fixture is installed on the described casing 221, rotates thereby drive described rotor 2.
Referring to Figure 4 and 5, in another kind of specific embodiments of the present invention, described generator 10 is interior rotary type generator, and described rotor 2 also comprises a rotating shaft 23, and described magnetic pole fixed mount 22 is fixed on the described rotating shaft 23; Described iron core installing rack 13 is made up of casing 131 and the end cap 132 that is installed on described casing 131 two ends, and described armature core 11 is fixed in the inboard of described casing 131; Described two end cap 132 is installed on the described rotating shaft 23 by two rolling bearings 4.The middle part of described two end cap 132 is formed with two annular flange flange that extend internally 133, and described rolling bearing 4 is located between described annular flange flange 133 and the described rotating shaft 23.The structure of described annular flange flange 133 can make things convenient for the installation of described rolling bearing 4 greatly.Described permanent magnetism magnetic pole 21 adheres to the periphery of described magnetic pole fixed mount 22 by adhesive, and is therefore easy for installation, reduced production cost.The generator of this structure, speed change wind wheel (not shown) directly or by another fixture is installed on the described rotating shaft 23, rotates thereby drive described rotor 2.
Mentality of designing that the present invention is concrete and realization principle are as follows: establishing permanent-magnet DC brushless variable speed constant-pressure wind power generator is minimum working speed n by the rotation speed change scope
0To the maximum functional rotation speed n
eThe speed change wind wheel drive, sending voltage is U
eDirect current transfer to electrical network through the inverter frequency conversion.When input speed n at n
0-n
eBetween when changing, electromotive force E=k
eN, armature winding leakage reactance X=f (n) are proportional to n to be changed, and output current also can increase along with the increase of n; When armature resistance R enough little (when calculating the internal resistance pressure drop, can omit resistance value), if can make armature winding leakage reactance pressure drop XI and electromotive force E=k
eN equivalent, variation synchronously can utilize reactance pressure drop voltage stabilizing, realize constant voltage output.
For realizing above-mentioned target, by minimum working speed n
0, the maximum functional rotation speed n
e, rated voltage U
e, rated current I
eDetermine the coefficient of potential Deng specified criteria
Make armature resistance perunit value R during Electromagnetic Design
*=0.02～0.04, armature voltage
Output current
Promptly
Then generator output voltage U=f (n)=E-XI promptly gets U=f (n)=U behind the substitution relevant parameter
e, realized utilizing reactance pressure drop voltage stabilizing, reach the purpose of constant voltage output.This shows, utilize the reactance pressure drop to reach the automatic voltage regulation purpose, realized constant voltage output.For example: according to a mag-dynamo provided by the invention, its rated power is 1500kW, rated voltage 1000V, minimum working speed n
0=8.8rpm, the maximum functional rotation speed n
e=22rpm.Armature winding is six cross streams windings, and rectifier is six phase full-wave rectifiers, and the casing external diameter is 4.8m, the external diameter of stator armature iron core is 4.5m, and motor pole number is the 2p=96 utmost point, core length l=750mm, dark, the wide ratio of armature storage tank is h: b=11.7: 1, and coefficient of potential k
e=113.64v/rpm, winding leakage reactance perunit value X when the maximum functional rotating speed
*=1.5.This generating function realizes constant voltage output well.
Above preferred embodiment only supplies explanation the present invention's usefulness, and is not limitation of the present invention.Those of ordinary skill in the art guides down without departing from the spirit and scope of the present invention, also can make various distortion and conversion, so all equivalent technical solutions all belongs to protection scope of the present invention.
Claims (12)
1, a kind of method for stabilizing voltage of permanent-magnet DC brushless variable speed constant-pressure wind power generator, this generator is driven by the speed change wind wheel, and the constant voltage direct current that sends transfers to electrical network after the inverter frequency conversion, and this generator is armature winding leakage reactance perunit value X when the maximum functional rotating speed
*Equal the generator maximum, the difference of minimum working speed and the ratio of minimum working speed, its value scope is 0.1 to 1.7, it is characterized in that: the degree of depth that this method makes its storage tank that is used for ccontaining winding when being the armature core of this generator of design and the ratio of width were greater than 6: 1, increase the leakage inductance value of the armature winding of this generator, thereby the leakage inductance reactance of the armature winding when increasing generator work, make when the rotating speed of this generator changes in its working speed scope, the leakage reactance pressure drop X1 equivalent of the electromotive force E of generator and armature winding, change synchronously, thereby realize constant voltage output.
2, the method for stabilizing voltage of permanent-magnet DC brushless variable speed constant-pressure wind power generator according to claim 1 is characterized in that: the degree of depth that makes described storage tank when designing the described armature core of this generator and the ratio of width were greater than 8: 1.
3, the method for stabilizing voltage of permanent-magnet DC brushless variable speed constant-pressure wind power generator according to claim 2 is characterized in that: the degree of depth that makes described storage tank when designing the described armature core of this generator is 10: 1 to 16: 1 with the ratio of width.
4, the method for stabilizing voltage of permanent-magnet DC brushless variable speed constant-pressure wind power generator according to claim 1, it is characterized in that: select the slot wedge of magnetic conductor for use as the described armature winding of sealing, with the leakage inductance value of the described armature winding of further increase, thereby obtain required leakage inductance reactance.
5, a kind of permanent-magnet DC brushless variable speed constant-pressure wind power generator, this generator (10) is driven by the speed change wind wheel, and the constant voltage direct current that sends transfers to electrical network (30) after inverter (20) frequency conversion, and described generator (10) comprising:
One stator (1) comprises armature core (11), is installed on the winding (12) in the described armature core (11) and is used to install the iron core installing rack (13) of described armature core (11);
One rotor (2) is rotatably installed on the described stator (1), drives rotation by described speed change wind wheel, and it comprises permanent magnetism magnetic pole (21) and is used to install the magnetic pole fixed mount (22) of described permanent magnetism magnetic pole (21);
One heterogeneous full-wave rectifier (3) connects the output of described winding (12), and it exports described inverter (20) to after with current commutates again;
It is characterized in that: be formed with multiple tracks storage tank (111) on the described armature core (11), described winding (12) is installed in the described storage tank (111), and the degree of depth of described storage tank (111) and the ratio of width were greater than 6: 1.
6, permanent-magnet DC brushless variable speed constant-pressure wind power generator according to claim 5 is characterized in that: the slot wedge of installing in the described storage tank (111) (14) is a magnetic conductor, and it is closed in described winding (12) in the described storage tank (111).
7, permanent-magnet DC brushless variable speed constant-pressure wind power generator according to claim 5 is characterized in that: the degree of depth of described storage tank (111) and the ratio of width were greater than 8: 1.
8, permanent-magnet DC brushless variable speed constant-pressure wind power generator according to claim 7 is characterized in that: the degree of depth of described storage tank (111) is 10: 1 to 16: 1 with the ratio of width.
9, according to claim 5 or 6 described permanent-magnet DC brushless variable speed constant-pressure wind power generators, it is characterized in that: this generator is the outward rotation type generator, described stator (1) also comprises a fixed axis (15), and described iron core installing rack (13) is fixed on the described fixed axis (15); Described magnetic pole fixed mount (22) is made up of casing (221) and the end cap (222) that is installed on casing (221) two ends, described permanent magnetism magnetic pole (21) is fixed in the inboard of described casing (221), and described two end cap (222) is installed on the described fixed axis (15) by two rolling bearings (4).
10, permanent-magnet DC brushless variable speed constant-pressure wind power generator according to claim 9, it is characterized in that: the middle part of described two end cap (222) is formed with two annular flange flange that extend internally (223), and described rolling bearing (4) is located between described annular flange flange (223) and the described fixed axis (15); Described permanent magnetism magnetic pole (21) adheres to the inner surface of described casing (221) by adhesive.
11, according to claim 5 or 6 described permanent-magnet DC brushless variable speed constant-pressure wind power generators, it is characterized in that: described generator (10) is interior rotary type generator, described rotor (2) also comprises a rotating shaft (23), and described magnetic pole fixed mount (22) is fixed on the described rotating shaft (23); Described iron core installing rack (13) is made up of casing (131) and the end cap (132) that is installed on described casing (131) two ends, and described armature core (11) is fixed in the inboard of described casing (131); Described two end cap (132) is installed on the described rotating shaft (23) by two rolling bearings (4).
12, permanent-magnet DC brushless variable speed constant-pressure wind power generator according to claim 11, it is characterized in that: the middle part of described two end cap (132) is formed with two annular flange flange that extend internally (133), and described rolling bearing (4) is located between described annular flange flange (133) and the described rotating shaft (23); Described permanent magnetism magnetic pole (21) adheres to the periphery of described magnetic pole fixed mount (22) by adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100665547A CN100426656C (en) | 2006-01-25 | 2006-03-30 | Permanent-magnet DC brushless variable speed constant-pressure wind power generator and its voltage stabilization method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610002095 | 2006-01-25 | ||
| CN200610002095.6 | 2006-01-25 | ||
| CNB2006100665547A CN100426656C (en) | 2006-01-25 | 2006-03-30 | Permanent-magnet DC brushless variable speed constant-pressure wind power generator and its voltage stabilization method |
Publications (2)
| Publication Number | Publication Date |
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| CN1841916A CN1841916A (en) | 2006-10-04 |
| CN100426656C true CN100426656C (en) | 2008-10-15 |
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| CNB2006100665547A Expired - Fee Related CN100426656C (en) | 2006-01-25 | 2006-03-30 | Permanent-magnet DC brushless variable speed constant-pressure wind power generator and its voltage stabilization method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7554303B1 (en) * | 2008-05-15 | 2009-06-30 | Hideo Kawamura | Controller of permanent magnet generator |
| CN110380531A (en) * | 2019-06-27 | 2019-10-25 | 康富科技股份有限公司 | A kind of dedicated no-brush synchronous generator of UPS |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5901268A (en) * | 1997-02-07 | 1999-05-04 | Zexel Corporation | Drive control apparatus for brushless motor |
| CN2605691Y (en) * | 2003-01-29 | 2004-03-03 | 中国国际科技促进会 | Charging generator set |
| US20040130284A1 (en) * | 2003-01-08 | 2004-07-08 | Samsung Electronics Co., Ltd | Apparatus and method for controlling brushless DC motor |
| CN2850124Y (en) * | 2006-01-25 | 2006-12-20 | 包头长安永磁电机研发有限公司 | Improved permanent magnet DC brushless speed change constant voltage wind driven generator |
-
2006
- 2006-03-30 CN CNB2006100665547A patent/CN100426656C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5901268A (en) * | 1997-02-07 | 1999-05-04 | Zexel Corporation | Drive control apparatus for brushless motor |
| US20040130284A1 (en) * | 2003-01-08 | 2004-07-08 | Samsung Electronics Co., Ltd | Apparatus and method for controlling brushless DC motor |
| CN2605691Y (en) * | 2003-01-29 | 2004-03-03 | 中国国际科技促进会 | Charging generator set |
| CN2850124Y (en) * | 2006-01-25 | 2006-12-20 | 包头长安永磁电机研发有限公司 | Improved permanent magnet DC brushless speed change constant voltage wind driven generator |
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| CN1841916A (en) | 2006-10-04 |
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Owner name: BAOTOU CHANG'AN PERMANENT MAGNET MACHINE CO., LTD. Free format text: FORMER NAME: BAOTOU CHANG'AN PERMANENT-MAGNET MACHINE RESEARCH AND DEVELOPMENT CO., LTD. |
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Address after: 014030 No. 169 prosperous South Road, rare earth hi tech Zone, the Inner Mongolia Autonomous Region, Baotou Patentee after: BAOTOU CHANG'AN PERMANENT MAGNET MOTOR CO.,LTD. Address before: Rare earth hi tech Industrial Development Zone, Baotou City, the Inner Mongolia Autonomous Region Rong Shiya road 014030 Patentee before: Baotou Chang'an Permanent-Magnet Machine Research and Development Co.,Ltd. |
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Granted publication date: 20081015 |