CN200987110Y - Overlapping dual rotors speed variating constant frequency generator - Google Patents

Abstract

A compound double rotor variable speed constant frequency generator comprises a generator body, in which a permanent magnetic inner rotor of the generator transmits power through a counter driveshaft and is constructed in the housing of the generator in such a way as to rotate in relative a stator; an annular rotor of the generator transmits power through a main driveshaft and is constructed in such a way as to embrace and rotate around the permanent magnetic inner rotor and also rotate in relative to the stator; the stator of the generator is provided in correspondence with the annular rotor; the counter driveshaft driven by an auxiliary wind wheel and the main driveshaft driven by a main wind wheel are assembled in a collinear way so as to rotate around each other, whereby the power from the auxiliary wind wheel is transmitted to the permanent inner rotor through the counter driveshaft. The utility model adopts a compound double rotor structure having the brushless double-fed motor rotor and the permanent inner rotor to achieve an excited variable-speed constant-frequency operation. The pole pair number is reduced at least by one third compared with a single-rotor generator, thereby reducing the diameter and weight of the generator and allowing a convenient transport.

Description

The telescopic double-rotor vscf generator

Technical field

The utility model relates to wind-driven generator, particularly has the vscf generator of telescopic double-rotor excitation structure.

Background technology

Known techniques such as Chinese patent CN200510022771.1 disclose a kind of speed-changing constant frequency method of wind power generation, be characterized in, at first the rotating speed with the wind energy conversion system rotor passes through the step-up gear speedup, the power shaft of the input power input differential permanent-magnet motor that then speed change is produced, carry out power dividing or interflow by the box of tricks of differential permanent-magnet motor and produce the stator winding that power circuit enters differential permanent-magnet motor and electrical network is realized the constant-speed and constant-frequency generating, to improve the generating efficiency of electricity generation system through feeder line.

And for example Chinese patent CN200410009701.8 discloses a kind of variable-speed constant-frequency wind power generation system and grid-connected control method thereof that adopts doubly fed induction generator as generator.Comprise doubly fed induction generator, pwm converter, DSP unit, electric quantity acquisition unit, speed, location measurement unit and driver element.It is controlled pwm converter, utilizes pwm converter control double-fed generator stator to produce voltage, and electric moter voltage phase place, amplitude and frequency are controlled simultaneously, and it is synchronous to need not to carry out separately line voltage and motor stator voltage; In motor speed range during at 0～0.5s, driver element begins to drive pwm converter, like this, the rotary speed scope that motor is incorporated into the power networks is very wide, and the control of being incorporated into the power networks is not strict to rate request, simultaneously, control procedure adopts open current loop control, has simplified system, has alleviated the burden of system processor, make and make that double feedback electric engine is easy to be incorporated into the power networks by the Current Control simple and easy row that becomes.

Chinese patent application 99127259.5 discloses a kind of high efficiency and has utilized wind energy method and full rotor double-wind-wheel wind power generation machine and teaching aid toy full rotor double-wind-wheel wind power generation machine.When moving first wind wheel of wind rotated, the wind and the wind wheel that see through the wind wheel back rotated second the wind wheel rotation of air stream promotion that produces, and wind wheel drives axostylus axostyle to right rotation, and wind wheel drives central siphon is done method from mechanical power to anticlockwise.To right rotation, to anticlockwise, coil cutting magnetic line sends electric current to the generating rotor on the wind wheel drive central siphon to pole wheel on the wind wheel drive axostylus axostyle of full rotor double-wind-wheel wind power generation machine under the supporting of bearing under the supporting of bearing.

Known wind turbine generator is produced wind wheel by gear box under the wind-force effect transmission of power is given generator and is made it obtain corresponding rotating speeds; Usually the rotating speed of wind wheel is very low, does not far reach the desired generating rotating speed of high-speed engine, must be used for by the speedup of gear box gear pair realizing; And the work condition environment of wind-driven generator unit is generally very poor, and the gear box fault that takes place frequently is a common occurrence.

The product reliability that known techniques is made is poor, the maintenance cost height, and unit efficiency is low.Industry wishes to utilize the variable speed constant frequency range of operation of the brushless structure and the broad of brushless double-fed machine technology, efficiently utilize the technical advantage of wind energy in conjunction with the two phoenix wheels that are installed on the birotor power transmission shaft reverse rotation mutually, remove gear box and complicated control system and realize that the variable speed constant frequency of generating set moves.

Summary of the invention

The utility model technical solution problem takes following technical scheme to realize, a kind of telescopic double-rotor vscf generator that provides according to the utility model, comprise the generator main body, wherein, the permanent magnetism internal rotor of generator by the counter drive shaft transmission, be the constructing apparatus of relative stator rotation in generator main body casing; The ring-shaped rotor of generator is by the final drive shaft transmission, and this ring-shaped rotor is to be encircled and can be around the constructing apparatus of permanent magnetism internal rotor rotation, and this ring-shaped rotor is the structure configuration of relative stator rotation; Generator unit stator and ring-shaped rotor coupling are provided with; Described ring-shaped rotor is made up of the ring-shaped rotor iron core of encircling the permanent magnetism internal rotor and the inboard winding of ring-shaped rotor that combines with ring-shaped rotor coupling unshakable in one's determination, ring-shaped rotor outside winding, will become the coaxial installation of the bind mode that can rotate mutually, give the permanent magnetism internal rotor by counter drive shaft with the transmission of power of secondary wind wheel with the final drive shaft of taking turns transmission by main air by the counter drive shaft of secondary wind wheel transmission.

This case technical solution problem can also further realize according to following technical measures:

Aforesaid telescopic double-rotor vscf generator, wherein, the relative main air wheel of secondary wind wheel is the reverse drive structure device that wind is rotated in the axle body end of counter drive shaft, and this pair wind wheel is upwind to wind rotation installation by the F2 direction; The drive structure that this main air wheel is wind direction rotation down is assemblied on the final drive shaft, and the other end of this final drive shaft stretches into casing and is the configuration of power transmission structure by ring-shaped rotor support unit and ring-shaped rotor; This main air wheel is down, and wind direction rotates installation to wind.

Aforesaid telescopic double-rotor vscf generator, wherein, the ring-shaped rotor support unit that described ring-shaped rotor is provided with respectively by its two ends is encircled aforementioned permanent magnetism internal rotor device on final drive shaft;

Aforesaid telescopic double-rotor vscf generator, wherein, described counter drive shaft supports by the clutch shaft bearing that is configured in generator first end cap portions, stretches out the secondary wind wheel of casing device; One end of described final drive shaft stretches out casing and the assembling of main air wheel by second bearings that is configured in generator second end cap portions.

Aforesaid telescopic double-rotor vscf generator, wherein, the position that described ring-shaped rotor support unit combines with power transmission shaft is provided with and makes the bearing part of ring-shaped rotor with the final drive shaft rotation.

Aforesaid telescopic double-rotor vscf generator, wherein, described major and minor power transmission shaft all has the hollow via-hole of preset diameters; The brake that is used for secondary wind wheel brake is arranged between generator ' s cover and the secondary wind wheel wheel hub.

The utility model compared with prior art has significant advantage and beneficial effect.By above technical scheme as can be known, the utility model has following advantage at least under the structural arrangements of excellence:

The generator of two wind wheel organizations is adopted in this case, wherein larger-diameter main air wheel is generating usefulness, than the secondary wind wheel of minor diameter for regulating the excitation frequency generating usefulness of holding concurrently, the two on same axis, opposite spin mutually, yawer is responsible for controlling the following wind direction of main air wheel and wind is rotated main force's generating; Secondary wind wheel upwind is to the wind reverse rotation, and auxiliary power generation improves usefulness greatly; The configuration of two wind wheel structure settings of this case and Yawing mechanism makes the simpler, reliable of set yaw control change;

Brushless double-fed machine rotor and rotary permanent-magnet internal rotor birotor cover stack structure are adopted in this case, realize the operation of unit variable speed constant frequency excitation, quite reduce 1/3 at least, thereby shorten the generator diameter, convenient transportation, reduction unit weight with capacity single rotor power generator electrode logarithm;

This case unit can be realized variable speed constant frequency operation, variable pitch adjusting, the two more single wind wheel variable speed constant frequency of the wind wheel generation unit unit wind energy utilizations of the following this case of rated wind speed improve a lot, non-gear box, can realize directly driving, the worry of no slip ring fault, do not need big capacity convertor assembly, unit reliability improves greatly; The utility model contrast prior art has significant contribution and progress, is really to have novelty, creativeness, practical good technology.

Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.

Description of drawings

Fig. 1 is the utility model telescopic double-rotor vscf generator structural representation;

Fig. 2 is the utility model excitation winding wiring construction schematic diagram;

Fig. 3 is the utility model variable speed constant frequency excitation control system structural representation;

Fig. 4 is the utility model variable speed constant frequency excitation control system operation principle block diagram.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and effect thereof that foundation the utility model is provided, describe in detail as after.

Shown in Fig. 1-4, a kind of telescopic double-rotor vscf generator comprises the generator main body 1 that is packed on the base 10, and generator unit stator 16 is installed in the generator main body casing 11, wherein,

Permanent magnetism internal rotor 17 by auxiliary driving 12 through-drive, be the constructing apparatus of relative stator 16 rotation in generator main body casing;

Ring-shaped rotor 14 is by final drive shaft 13 transmissions, and this ring-shaped rotor is to be encircled and can be around the constructing apparatus of permanent magnetism internal rotor rotation, and this ring-shaped rotor 14 is the structure configuration of relative stator 16 rotations; This ring-shaped rotor 14 is encircled aforementioned permanent magnetism internal rotor 17 devices on final drive shaft 13 by ring-shaped rotor support unit 140; Generator unit stator 16 is provided with ring-shaped rotor 14 couplings, and the stator winding 161 of outwards exporting electric energy is contained on the stator core 162 that is installed in the motor casing;

Described ring-shaped rotor 14 is made up of the ring-shaped rotor of encircling the permanent magnetism internal rotor unshakable in one's determination 141 and the inboard winding 142 of ring-shaped rotor that combines with ring-shaped rotor coupling unshakable in one's determination, ring-shaped rotor outside winding 143, the two ends of described ring-shaped rotor are provided with ring-shaped rotor support unit 140 respectively, the position that this ring-shaped rotor support unit combines with power transmission shaft is provided with bearing part 1401, so that ring-shaped rotor rotates with final drive shaft;

Ring-shaped rotor forms the dual rotor configuration of telescopiform of generator as brushless double-fed machine rotor and the permanent magnetism internal rotor by counter drive shaft transmission rotation thus; Thereby can realize the operation of unit variable speed constant frequency, quite reduce 1/3 at least, thereby can shorten the generator diameter greatly, make things convenient for the equipment transportation, reduce motor weight with capacity single rotor power generator electrode logarithm;

Secondary wind wheel 2 is the relative main air of upwind by its wheel hub 21 by known techniques and takes turns the external part 121 that the drive structure of reverse rotation is assemblied in counter drive shaft; The brake 15 that is used for secondary wind wheel brake is arranged between generator ' s cover and the secondary wind wheel wheel hub;

Described counter drive shaft supports by the clutch shaft bearing 115 that is configured in 111 ones of generator first end caps, stretch out the secondary wind wheel of casing 11 devices, pair wind wheel 2 relative main airs wheels are the reverse drive structure device that wind is rotated in the axle body end of counter drive shaft 12, and this pair wind wheel is upwind to wind rotation installation with known techniques by the F2 direction by its wheel hub 21;

By known techniques, will by the counter drive shaft 12 of secondary wind wheel transmission with by 13 one-tenths coaxial installations of the bind mode that can rotate mutually of final drive shaft of main air wheel transmission, by counter drive shaft with the transmission of power of secondary wind wheel to the permanent magnetism internal rotor; Described major and minor power transmission shaft all has the hollow via-hole 120,130 of preset diameters, so that the Generator Set power transmission shaft is satisfying under the specification requirement condition more lightweight, thereby reduces body weight;

One end of described final drive shaft supports by second bearing 116 that is configured in 112 ones of generator second end caps and stretches out casing and the assembling of main air wheel, this main air wheel 3 is assemblied on the final drive shaft 13 by the drive structure that its wheel hub 31 is wind direction rotation down, and the other end of this final drive shaft stretches into casing and is the configuration of power transmission structure by ring-shaped rotor support unit 140 by known techniques and ring-shaped rotor; This main air wheel is down with known techniques by the F3 direction by its wheel hub 31, and wind direction rotates installation to wind;

A kind of overlapped double rotor generator variable speed constant frequency excitation control system, comprise aforementioned generator M, wherein, the main air of generator wheel 3 is configured on the final drive shaft, the stator 16 that has the Pg number of pole-pairs under the wind-force effect relatively is with the rotation of Nzr speed, and the main air wheel speed satisfies following relational expression:

$\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$

Wherein: Nzr represents the main air wheel speed; Pg represents the stator winding number of pole-pairs; Pe represents the number of pole-pairs of permanent magnetism internal rotor; Fg represents stator frequency; Fe represents permanent magnetism internal rotor reduced frequency;

The inboard winding number of pole-pairs of described ring-shaped rotor and the consistent Pe that is set to of permanent magnetism internal rotor number of pole-pairs are to the utmost point; The consistent Pg that is set to the stator winding number of pole-pairs is to the utmost point for described ring-shaped rotor outside winding number of pole-pairs; Described ring-shaped rotor outside winding is connected by connecting line 123 negative-phase sequences between the ring-shaped rotor winding with inboard winding; Described ring-shaped rotor outside winding number of pole-pairs Pg is set to greater than the inboard winding number of pole-pairs of ring-shaped rotor Pe, and described ring-shaped rotor outside winding number of pole-pairs can be 3 times the inboard winding number of pole-pairs of ring-shaped rotor;

Generator secondary wind wheel 2 be configured on the counter drive shaft, this pair wind wheel drives permanent magnetism internal rotor with the reverse rotation of the relative main air wheel of Ne speed, and permanent magnetism internal rotor reduced frequency satisfies following relational expression:

$\mathrm{fe}=\frac{\mathrm{Ne}\×\mathrm{Pe}}{60}$ Wherein: Ne vice wind wheel relative stator rotating speed;

Be configured to the permanent magnetism internal rotor that the Nzre rotating speed is counterrotating, have the Pe number of pole-pairs on counter drive shaft, the rotating speed of the relative ring-shaped rotor rotation of permanent magnetism internal rotor satisfies following relational expression: Nzre=Nzr+Ne

Wherein: Nzre represents the rotating speed of the relative ring-shaped rotor rotation of permanent magnetism internal rotor;

Be provided with on the aforesaid major and minor wind wheel and the signal of rotating speed can be sent to the main air wheel speed measurement mechanism G of unit centralized control equipment 5, secondary wind speed round measurement mechanism G1, the wind speed that the port D1 that connects via the wind speed checkout gear records and by the wind speed round that rotation-speed measuring device records is transferred to unit centralized control equipment 5; Unit centralized control equipment and yawer 6 connect, and wind direction is to wind rotation rotation down for control main air wheel, and yawer 6 can be installed on the engine room inside 101 under the base;

Described main air wheel is taken turns variable propeller pitch adjusting mechanism 38, secondary wind wheel variable propeller pitch adjusting mechanism 28 with the main air of the hub portion difference configuration adjustment propeller pitch angle of secondary wind wheel, this main air wheel, secondary wind wheel variable propeller pitch adjusting mechanism and the 5 electric connections of unit centralized control equipment are sent the instruction of change oar by 5 pairs of main air wheels of unit centralized control equipment variable propeller pitch adjusting mechanism 38; Dispose secondary wind wheel propeller pitch angle measurement mechanism G28, main air wheel propeller pitch angle measurement mechanism G38 in described main air wheel and the secondary wind wheel respectively;

Described major and minor wind wheel variable propeller pitch adjusting mechanism structure is identical, it is made up of change oar servomechanism 381,281 that drives with servomotor M38, M28 and change oar control device 382,282, and described unit centralized control equipment 5 is by becoming oar control device 382,282 and connecting with the change oar servomechanism 381,281 that servomotor M38, M28 drive; This change oar servomechanism changes the rotational speed regulation of carrying out main air wheel and secondary wind wheel according to detected propeller pitch angle under the control of unit centralized control equipment 5, realize that wind direction rotates wind under the main air wheel, and secondary wind wheel upwind is to the wind reverse rotation; Brake 15 is arranged between generator ' s cover and the secondary wind wheel wheel hub;

Voltage output end at generator connects grid-connection control device 7 and step-up transformer 8 successively, connects with external power grid W again; Between grid-connection control device and step-up transformer successively the output voltage measurement mechanism G4 that connects of configuration and unit centralized control equipment 5, the detecting device for output current G3 that connects with the unit centralized control equipment, and with the mains frequency checkout gear G2 of unit centralized control equipment connection; The unloaded checkout gear G5 that configuration and unit centralized control equipment connect between generator M and grid-connection control device; The unit centralized control equipment also have the port D1 that connects with wind speed checkout gear (not shown), with wind direction checkout gear (not shown) connect port D2, with the port D3 of host computer transmission data; Described major and minor wind wheel blade is pressed known technology mode device on the wind wheel wheel hub, described main air impeller blade wind sweeping area is greater than blade wind sweeping area 2-5 times of secondary wind wheel, especially be that 3 times of left and right sides of blade wind sweeping area of secondary wind wheel are preferable with main air impeller blade wind sweeping area, described wind sweeping area is the area that the wind wheel rotation forms;

The output voltage of the output current of the generator that records via detecting device for output current G3 and the generator that records via output voltage measurement mechanism G4 is transferred to unit centralized control equipment 5, and the output of a generator value that calculates via unit centralized control equipment 5 is right with default rated power numeric ratio; Imposing a condition down, wind speed that unit centralized control equipment 5 will be recorded by the connection port D1 of wind speed checkout gear and the main air wheel rated speed that records by rotation-speed measuring device G, collection calculates the adjusting numerical value of the propeller pitch angle of main air wheel rated speed under this wind speed, compare with the propeller pitch angle value of main air wheel propeller pitch angle measurement mechanism G38 collection again, send the instruction of change oar by 5 pairs of main airs wheels of unit centralized control equipment variable propeller pitch adjusting mechanism 38; Can realize that thus the main air wheel moves, and prevents the generator overload under firm power;

When intussusception permanent-magnet variable-speed constant frequency excitation birotor generator is incorporated into the power networks, the main air wheel speed is between default rated speed and minimum speed the time, secondary wind wheel under unit centralized control equipment 5 is regulated by the reverse rotation of pre-conditioned relative main air wheel, make the generator unit stator electric voltage frequency be always 50Hz by this rotation speed change; Secondary wind speed round is minimum to zero, brake 15 work when secondary wind speed round is 0 speed,

To sum up, the generator of two wind wheel organizations, wherein larger-diameter main air wheel is used for generating, secondary wind wheel than minor diameter is used for regulating the double generating of excitation frequency, the two on same axis, mutually opposite spin, yawer be responsible for controlling the main air wheel down wind direction wind is rotated main force's generating; Secondary wind wheel upwind is to the wind reverse rotation, and auxiliary power generation improves usefulness greatly.

Configurations such as the voltage output end grid-connection control device of described generator can be limited generator output voltage, with after date softly be incorporated into the power networks, soft parallel off when shutting down, can effectively reduce the impact of the reactive current that is incorporated into the power networks, guarantee unit safety operation; When generator reached rated output power, power of the assembling unit factor was controlled at operation about cos θ=1; When the generator active power of output hour, the lagging reactive power of unit output cos θ＜1; When generator speed was lower than specified minimum speed or output of a generator and is higher than peak power output, off-the-line generator from the electrical network was finished soft off-the-line by configurations such as grid-connection control devices.

A kind of overlapped double rotor generator exciting method

Be configured in the stator that has the Pg number of pole-pairs under the wind-force effect relatively main air wheel on the final drive shaft, and the main air wheel speed satisfies following relational expression with the rotation of Nzr speed: $\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$

Wherein: Nzr represents the main air wheel speed; Pg represents ring-shaped rotor outside winding number of pole-pairs; Pe represents the number of pole-pairs of permanent magnetism internal rotor; Fg represents stator frequency; Fe represents permanent magnetism internal rotor reduced frequency;

2. the secondary wind wheel in the configuration of counter drive shaft 12 ends drives the permanent magnetism internal rotor with the reverse rotation of the relative main air wheel of Ne speed, and permanent magnetism internal rotor reduced frequency satisfies following relational expression: $\mathrm{fe}=\frac{\mathrm{Ne}\×\mathrm{Pe}}{60}$

Wherein: Ne vice wind wheel relative stator rotating speed

3. be configured to the permanent magnetism internal rotor that the Nzre rotating speed is counterrotating, have the Pe number of pole-pairs on counter drive shaft, the rotating speed of the relative excitation internal rotor rotation of permanent magnetism internal rotor satisfies following relational expression:

Nzre=Nzr+Ne is wherein: Nzre represents the rotating speed of the relative ring-shaped rotor rotation of permanent magnetism internal rotor;

4. the inboard winding number of pole-pairs of described ring-shaped rotor and the consistent Pe that is set to of permanent magnetism internal rotor number of pole-pairs are to the utmost point; The consistent Pg that is set to the stator winding number of pole-pairs is to the utmost point for described ring-shaped rotor outside winding number of pole-pairs; Described ring-shaped rotor outside winding is connected by connecting line 123 negative-phase sequences between the ring-shaped rotor winding with inboard winding;

5. the wind speed that records of the port D1 that connects via the wind speed checkout gear and by the main air wheel speed that rotation-speed measuring device G records is transferred to unit centralized control equipment 5,

It is right that the unit centralized control equipment carries out main air vane tip speed ratio numeric ratio when the main air wheel is lower than rated speed, warp is right with the main air vane tip speed ratio numeric ratio that the unit centralized control equipment is preset, calculate the adjusting numerical value of propeller pitch angle, compare with the propeller pitch angle value of main air wheel propeller pitch angle measurement mechanism G38 collection again, send the instruction of change oar by 5 pairs of main airs wheels of unit centralized control equipment variable propeller pitch adjusting mechanism 38; Can realize that thus the main air wheel moves with its best tip speed ratio, reaches the purpose that makes full use of wind energy below rated speed;

When the main air wheel reaches rated speed, the output voltage of the output current of the generator that records via detecting device for output current G3 and the generator that records via output voltage measurement mechanism G4 is transferred to unit centralized control equipment 5, and the output of a generator value that calculates via this unit centralized control equipment is right with default rated power numeric ratio; When meeting preset value, wind speed that the port D1 that is connect by the wind speed checkout gear that unit centralized control equipment 5 will collect records and the main air wheel rated speed that records by rotation-speed measuring device G, calculate the adjusting numerical value of the propeller pitch angle of main air wheel rated speed under this wind speed, compare with the propeller pitch angle value of main air wheel propeller pitch angle measurement mechanism G38 collection again, send the instruction of change oar by 5 pairs of main airs wheels of unit centralized control equipment variable propeller pitch adjusting mechanism 38; Can realize that thus the main air wheel moves, and prevents the generator overload under firm power;

6. the wind speed that records of the port D1 that connects via the wind speed checkout gear and the secondary wind speed round that records by secondary wind speed round measurement mechanism G1 are transferred to unit centralized control equipment 5; By unit centralized control equipment 5 according to $\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$ Relational expression is carried out speed Control, makes generator in rated speed and the operation of the following 50Hz of remaining constant frequency;

When the main air wheel is lower than rated speed, the generator output voltage frequency numerical value comparison that secondary wind speed round calculates under the frequency numerical value of unit centralized control equipment collection mains frequency checkout gear G2 and this main air wheel speed, calculate the adjusting numerical value of propeller pitch angle under this rotating speed of secondary wind wheel, compare with the propeller pitch angle value of secondary wind wheel propeller pitch angle measurement mechanism G28 collection again, by the unit centralized control equipment secondary wind wheel variable propeller pitch adjusting mechanism 28 is sent the instruction of change oar, make generator below rated speed, keep the operation of 50Hz constant frequency;

When the main air wheel reaches rated speed, wind speed that the port D1 that connects via the wind speed checkout gear records certainly and the secondary rated rotation speed of rotor that records by rotation-speed measuring device G, be transferred to unit centralized control equipment 5, when the main air wheel reaches rated speed, unit centralized control equipment 5 is gathered the generator output voltage frequency numerical value comparison that calculates under mains frequency checkout gear G2 frequency numerical value and the secondary rated rotation speed of rotor, calculate the adjusting numerical value of secondary wind wheel propeller pitch angle under this wind speed, compare with the propeller pitch angle value of secondary wind wheel propeller pitch angle measurement mechanism G28 collection again, send the instruction of change oar by 5 pairs of secondary wind wheel variable propeller pitch adjusting mechanisms 28 of unit centralized control equipment; Make generator when rated speed, keep the operation of 50Hz constant frequency; With the generator output voltage frequency serves as to regulate target, and to limit stator frequency fg be 50Hz by regulating rotating speed that secondary wind wheel propeller pitch angle controls secondary wind wheel, and the static fe of permanent magnetism internal rotor is considered as 0;

7. described ring-shaped rotor outside winding number of pole-pairs Pg is set to greater than the inboard winding number of pole-pairs of ring-shaped rotor Pe, and described ring-shaped rotor outside winding number of pole-pairs can be 3 times the inboard winding number of pole-pairs of ring-shaped rotor;

Thereby, two rotor windings of intussusception have identical power frequency, mutual reciprocal rotating magnetic field during work, the rotary speed Nzre of the relative intussusception rotor of generator amature winding excitation field superposes, cooperates with the speed Nzr of main air wheel shaft mechanical rotation, all the time form synchronous excitation magnetic field, this synchronous field produces the 50Hz electromotive force in to the stator winding of the utmost point having Pg, realizes the variable speed constant frequency excitation operation of generating set.

8. being assemblied in main air wheel and the secondary wind wheel 2 that is assemblied in counter drive shaft on the power transmission shaft 13 regulates by the relative opposite direction at blade pitch angle and is relative reverse rotation and disposes.

9. when the main air wheel speed was between default rated speed and minimum speed, secondary wind wheel made the generator unit stator electric voltage frequency be always the variation rotating speed of 50Hz by default rule reverse rotation, formation under unit centralized control equipment 5 is regulated; When the main air wheel speed reached 1.2-1.5 times of rated speed, when secondary wind speed round reached minimum speed 0 speed simultaneously, brake 15 started; Both this, when the main air wheel speed reached specified minimum speed, secondary wind wheel reverse speed reached the highest, unit can be realized the variable speed constant frequency operation.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims (6)

1. a telescopic double-rotor vscf generator comprises generator main body (1), it is characterized in that, the permanent magnetism internal rotor (17) of generator by auxiliary driving (12) through-drive, be the constructing apparatus of relative stator (16) rotation in generator main body casing; The ring-shaped rotor of generator (14) is by final drive shaft (13) transmission, and this ring-shaped rotor is to be encircled and can be around the constructing apparatus of permanent magnetism internal rotor rotation, and this ring-shaped rotor is the structure configuration of relative stator rotation; Generator unit stator and ring-shaped rotor coupling are provided with; Winding (143) was formed outside described ring-shaped rotor (14) mated the inboard winding (142) of the ring-shaped rotor that combines, ring-shaped rotor by the ring-shaped rotor iron core (141) of encircling the permanent magnetism internal rotor with ring-shaped rotor is unshakable in one's determination, will become the coaxial installation of the bind mode that can rotate mutually, give the permanent magnetism internal rotor by counter drive shaft with the transmission of power of secondary wind wheel with the final drive shaft (13) of taking turns transmission by main air by the counter drive shaft (12) of secondary wind wheel transmission.

2. telescopic double-rotor vscf generator as claimed in claim 1, it is characterized in that, the relative main air wheel of pair wind wheel is the reverse drive structure device that wind is rotated in the axle body end of counter drive shaft, and this pair wind wheel is upwind to wind rotation installation by the F2 direction; The drive structure that this main air wheel (3) is wind direction rotation down is assemblied on the final drive shaft (13), and the other end of this final drive shaft stretches into casing and is the configuration of power transmission structure by ring-shaped rotor support unit (140) and ring-shaped rotor; This main air wheel is down, and wind direction rotates installation to wind.

3. telescopic double-rotor vscf generator as claimed in claim 1 or 2, it is characterized in that the ring-shaped rotor support unit (140) that described ring-shaped rotor (14) is provided with respectively by its two ends is encircled aforementioned permanent magnetism internal rotor (17) device on final drive shaft (13).

4. telescopic double-rotor vscf generator as claimed in claim 3 is characterized in that, described counter drive shaft supports by the clutch shaft bearing (115) that is configured in generator first end cap (111) portion, stretches out casing (11) and installs secondary wind wheel; One end of described final drive shaft supports by second bearing (116) that is configured in generator second end cap (112) portion and stretches out casing and the assembling of main air wheel.

5. telescopic double-rotor vscf generator as claimed in claim 4 is characterized in that, the position that described ring-shaped rotor support unit combines with power transmission shaft is provided with and makes the bearing part (1401) of ring-shaped rotor with the final drive shaft rotation.

6. telescopic double-rotor vscf generator as claimed in claim 5 is characterized in that, described major and minor power transmission shaft all has the hollow via-hole (120,130) of preset diameters; The brake (15) that is used for secondary wind wheel brake is arranged between generator ' s cover and the secondary wind wheel wheel hub.

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