CN200980032Y - Series connection double rotor variable-speed frequency-conversion excitation wind motor - Google Patents

Abstract

A serial double-rotor variable-speed variable-frequency excitation wind generator, including a generator main body, the rotor of the generator is configured to rotate relative to the stator through the main transmission shaft, and the feature is that the exciter passes through the main transmission shaft of the main wind wheel and the generator The machine body is coaxially installed in the casing; the permanent magnet outer rotor is set in a structure that rotates relative to the exciter inner rotor, and the permanent magnet outer rotor is set in a structure that rotates relative to the generator stator; the auxiliary wind wheel is The structure that can drive the permanent magnet outer rotor is installed on the auxiliary transmission shaft; the transmission structure that the auxiliary wind wheel rotates in the opposite direction relative to the main wind wheel is installed on the auxiliary transmission shaft. The wind wheel is assembled on the main transmission shaft, and the main wind wheel is arranged in a downwind direction and rotates against the wind. In this case, the dual wind turbines are designed to work at the same time, and the wind energy utilization rate is 15%-25% higher than that of a single wind turbine with the same capacity.

Description

Series dual-rotor variable-speed variable-frequency excitation wind motor

Technical field

The utility model relates to a wind power generator, in particular to a double-rotor wind motor with series permanent magnet variable-speed variable-frequency excitation excitation.

Background technique

The known technology such as Chinese patent CN200510022771.1 discloses a variable speed and frequency conversion method for wind power generation. The input shaft of the magneto is divided or merged by the differential mechanism of the differential permanent magnet motor to generate power flow into the stator winding of the differential permanent magnet motor and through the feeder to the power grid to achieve constant speed variable frequency power generation to improve the power generation efficiency of the power generation system .

Another example is Chinese patent CN200410003089.3 which discloses a MW level direct drive permanent magnet outer rotor synchronous wind generator, which adopts a multi-pole outer rotor structure. The generator includes a fixed shaft, a rotating shaft, a coil winding, a permanent magnetic steel, an iron core, a stator and an outer rotor, wherein the rotating shaft is mounted on the fixed shaft through a bearing, the stator is mounted on the fixed shaft through a stator bracket, and the outer rotor passes through The rotor support is installed on the rotating shaft, and an axial cooling ventilation channel may be provided between the winding coil and the stator support; a protective cover is provided on the windward surface between the outer rotor and the stator. Due to the large number of poles, the speed is very low, so there is no need for a speed-increasing gearbox, and it can be directly driven to generate electricity; the generator does not have its own cooling fan or external cooling system.

It is known that wind turbines transmit the power generated by the wind wheel under the action of wind to the generator through the gearbox and make it obtain a corresponding speed; usually the speed of the wind wheel is very low, which is far below the requirements for high-speed generator power generation. The speed must be realized through the speed-up effect of the gear pair of the gearbox; while the working conditions of the wind turbine unit are generally very poor, frequent failures of the gearbox are common.

Products manufactured by conventional technologies have poor reliability, high maintenance costs, and low unit efficiency. The industry hopes to take advantage of the brushless structure of the brushless doubly-fed motor technology and the wide range of variable speed and variable frequency operation, combined with the technical advantages of the double phoenix wheels installed on the dual rotor drive shafts that rotate in opposite directions against the wind to efficiently utilize wind energy, and remove the gear box. And the complex control system realizes the variable speed and frequency conversion operation of the generator set.

Contents of Invention

The problem to be solved by the utility model is to overcome the above-mentioned defects existing in the conventional technology, and provide a serial double-rotor variable-speed variable-frequency excitation wind motor.

The utility model solves the technical problem by adopting the following technical solutions. According to the utility model, a series double-rotor variable-speed variable-frequency excitation wind motor includes a main body of a generator, and the rotor of the generator rotates relative to the stator through the main drive shaft. The structural setting is characterized in that the exciter is coaxially installed in the casing through the main transmission shaft of the main wind wheel of the device and the main body of the generator; the permanent magnet outer rotor is set in a structure that is relatively rotating with the inner rotor of the exciter. The permanent magnet outer rotor is configured to rotate relative to the generator stator; the auxiliary wind wheel is configured to drive the permanent magnet outer rotor and installed on the auxiliary drive shaft; the auxiliary wind wheel rotates in the opposite direction relative to the main wind wheel The transmission structure is installed on the auxiliary transmission shaft. The auxiliary wind wheel is installed facing the wind in the upwind direction. The main wind wheel is assembled on the main transmission shaft.

In this case, the solution to the technical problem of the series double-rotor variable-speed variable-frequency excitation wind motor can be further realized by the following technical measures:

In the aforementioned serial dual-rotor variable-speed variable-frequency excitation wind generator, the auxiliary transmission shaft driven by the auxiliary wind wheel and the main transmission shaft driven by the main wind wheel are coaxially connected in a mutually rotatable manner.

In the aforementioned serial dual-rotor variable-speed variable-frequency excitation wind generator, the main and auxiliary transmission shafts have hollow through holes with preset diameters, and the transmission shafts are supported by bearings arranged on the generator and the exciter.

In the aforementioned serial dual-rotor variable-speed variable-frequency excitation wind generator, there is a preset distance between the auxiliary wind rotor and the exciter to avoid collision between the auxiliary wind rotor and the tower.

In the aforementioned serial dual-rotor variable-speed variable-frequency excitation wind generator, the preset distance between the auxiliary wind rotor and the exciter is determined by the elevation angle of the main wind rotor.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. It can be seen from the above technical solutions that the utility model has at least the following advantages under the excellent structural configuration:

In this case, the dual wind turbines are designed to work at the same time, and the wind energy utilization rate is 15%-25% higher than that of a single wind turbine with the same capacity. This case adopts the double-rotor structure of the brushless double-fed motor rotor and the rotating permanent magnet outer rotor to realize the variable-speed and variable-frequency operation of the unit, which is equivalent to reducing the number of pole pairs of a single-rotor generator with the same capacity by half, thereby greatly shortening the diameter of the generator space and facilitating equipment transportation. The weight of the unit; the structure setting of the double wind turbines and the configuration of the yaw mechanism in this case make the yaw control of the unit simpler and more reliable; the unit in this case can realize variable speed and frequency operation and pitch adjustment. Compared with the single wind wheel variable speed frequency conversion unit, the wind energy utilization rate has been improved, and there is no gearbox, direct drive can be realized, and there is no worry about slip ring failure; the utility model has significant contributions and progress compared with the prior art, and it is indeed novel Innovative, creative, and practical good technology.

The specific embodiment of the utility model is given in detail by the following examples and accompanying drawings.

Description of drawings

Fig. 1 is a structural schematic diagram of a stroke motor of the present utility model;

Fig. 2 is a schematic diagram of the wiring structure of the field winding of the utility model;

Fig. 3 is a structural schematic diagram of the variable-speed and variable-frequency excitation control system of the present invention;

Fig. 4 is a working principle block diagram of the variable-speed and variable-frequency excitation control system of the utility model.

Detailed ways

Below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, features and effects provided by the present utility model will be described in detail as follows.

As shown in Figures 1-4, a series double-rotor variable-speed variable-frequency excitation wind motor includes a generator body 1 fixed on a base 10, a generator stator 16 fixed in a motor casing 111, and a generator rotor 14 passing through The main transmission shaft 13 is configured to rotate relative to the stator 16, wherein,

The exciter 4 is coaxially installed in the casing through the main transmission shaft and the main body of the generator; the permanent magnet 43 is installed on the yoke 42 in the permanent magnet outer rotor housing 410 to form the permanent magnet outer rotor 41 of the exciter. The permanent magnet outer rotor is set in a structure that is relatively rotating with the exciter inner rotor 45 through the connecting piece 46; the permanent magnets 43 are arranged in groups according to the known technology, and the number of pole pairs is the same as the number of pole pairs of the exciter inner rotor. Matching; the permanent magnet outer rotor is configured to rotate relative to the inner rotor of the exciter and rotate relative to the stator of the generator;

The auxiliary drive shaft 12 is coaxially connected with the main drive shaft 13; the main and auxiliary drive shafts have a hollow through hole 130 with a preset diameter, so that the transmission shaft of a large generator set is lighter in weight under the condition of meeting the technical requirements, thereby To reduce the weight of the body, the transmission shaft is supported by bearings 115, 116 arranged on the generator and bearings 147, 148 on the exciter;

As a result, the generator rotor and the exciter inner rotor coaxially rotated form a serial rotor structure of the generator, and form a double-rotor structure with the permanent magnet outer rotor, so that the unit can realize variable speed and frequency conversion operation, which is equivalent to a single unit with the same capacity. The number of pole pairs of the rotor generator is reduced by at least 1/3-1/2, so the diameter of the generator can be shortened, and the weight of the motor can be further reduced;

Through the known technology, the auxiliary transmission shaft 12 driven by the auxiliary wind wheel and the main transmission shaft 13 driven by the main wind wheel are coaxially installed in a mutually rotatable connection mode, and the power of the auxiliary wind wheel is transferred by the auxiliary transmission shaft. transmitted to the permanent magnet outer rotor;

The auxiliary wind wheel 2 is installed on the end of the shaft body of the auxiliary drive shaft 12 with a transmission structure that rotates in the opposite direction relative to the main wind wheel. There is a preset distance L between the wind rotor and the exciter to avoid collision between the auxiliary wind rotor and the tower, and the reserved distance between the auxiliary wind rotor and the tower can be determined by the elevation angle of the main wind rotor.

The main wind wheel 3 is assembled on the end of the main transmission shaft 13 shaft body, and the main wind wheel is arranged in a downwind direction to the wind by its wheel hub 31 according to the known technology in the direction of F3.

A variable-speed variable-frequency wind generator excitation control system, including the aforementioned wind motor M, the main wind wheel 3 of the wind motor is arranged on the main transmission shaft, and the stator 16 with Pg pole logarithm rotates at Ner speed under the action of wind force, and the main The speed of the wind rotor satisfies the following relationship:

$\mathrm{<span\; class="notranslate">\; Nzr</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 60</span>}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; fg</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; fe</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; Pg</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; Pe</span>}}$

Among them: Nzr represents the speed of the main wind rotor; Pg represents the number of pole pairs of the stator winding; Pe represents the number of pole pairs of the permanent magnet outer rotor 41; fg represents the frequency of the stator; fe represents the converted frequency of the permanent magnet external rotor;

The number of pole pairs of the windings of the inner rotor 45 of the exciter is set to be the opposite poles of Pe; the number of pole pairs of the windings of the generator rotor 14 is set to be the pair of poles of Pg; the inner rotor windings of the exciter and the generator rotor windings are connected through the rotor Line 123 is connected in reverse phase sequence; the number of pole pairs Pg of the stator winding is set to be greater than the number of pole pairs Pe of the permanent magnet outer rotor, and the number of pole pairs of the stator winding can be 3 times the number of pole pairs of the permanent magnet inner rotor;

The auxiliary wind rotor 2 of the wind generator is arranged on the auxiliary transmission shaft. The auxiliary wind rotor drives the permanent magnet outer rotor to rotate against the wind at Ne speed relative to the main wind rotor, and the converted frequency of the permanent magnet outer rotor satisfies the following relationship:

$\mathrm{fe}=\frac{\mathrm{Ne}\&times;\mathrm{Pe}}{60}$ Among them: Ne represents the relative speed of the auxiliary wind wheel to the stator;

A permanent magnet outer rotor with a Pe pole logarithm that rotates relatively at the Nzre speed is arranged on the auxiliary drive shaft. The rotational speed of the permanent magnet outer rotor relative to the exciter inner rotor satisfies the following relationship:

Nzre=Nzr+Ne

Among them: Nzre represents the rotation speed of the permanent magnet outer rotor relative to the inner rotor of the exciter;

The above-mentioned main and auxiliary wind wheels are provided with the main wind wheel speed measuring device G and the auxiliary wind wheel speed measuring device G1, which can transmit the signal of the speed to the unit centralized control device 5, and the wind speed measured through the port D1 connected to the wind speed detection device and the wind rotor speed measured by the speed measuring device are transmitted to the unit centralized control device 5; the unit centralized control device is connected with the yaw controller 6 to control the downwind direction of the main wind rotor to rotate against the wind, and the yaw controller 6 can be installed on nacelle interior 101 under the base;

The hub parts of the main wind rotor and the auxiliary wind rotor are respectively equipped with a main wind rotor pitch adjustment mechanism 38 and an auxiliary wind rotor pitch adjustment mechanism 28 for adjusting the pitch angle. The pitch adjustment mechanism is electrically connected with the unit centralized control device 5, and the unit centralized control device 5 issues a pitch change command to the main wind rotor pitch adjustment mechanism 38; the main wind rotor and the auxiliary wind rotor are respectively equipped with auxiliary wind rotor blades Pitch angle measurement device G28, main wind rotor pitch angle measurement device G38;

The main and auxiliary wind wheel pitch adjustment mechanisms have the same structure, which consists of pitch servo mechanisms 381, 281 driven by servo motors M38, M28 and pitch control devices 382, 282. The unit is integrated

The control 5 is connected with the pitch servo mechanism 381, 281 driven by the servo motor M38, M28 through the pitch control device 382, 282; the pitch servo mechanism changes according to the detected pitch angle under the control of the unit centralized control device 5 Adjust the speed of the main wind rotor and the auxiliary wind rotor to realize the downwind rotation of the main wind rotor against the wind, while the upwind direction of the auxiliary wind rotor reverses the windward rotation; the brake 15 is arranged between the generator end cover and the hub of the auxiliary wind rotor;

Connect the grid-connected frequency converter 7 and the step-up transformer 8 in sequence at the voltage output end of the generator, and then connect with the external power grid W; between the grid-connected frequency converter and the step-up transformer, arrange in turn a power grid connected to the unit centralized control device 5 The voltage measurement device G4, the output current detection device G3 connected with the centralized control device of the unit; the no-load detection device G5 connected with the centralized control device of the unit is arranged between the generator M and the grid-connected inverter; The port D1 connected to the wind speed detection device (not shown), the port D2 connected to the wind direction detection device (not shown), and the port D3 to transmit data with the host computer; the main and auxiliary wind rotor blades are installed in a known technical manner On the hub of the wind rotor, the sweeping area of the main wind rotor blades is 2-5 times greater than the blade sweeping area of the auxiliary wind rotor, especially 3 times the sweeping area of the blades of the main wind rotor blades Left and right are better, and the sweeping area is the area formed by the rotation of the wind wheel;

To sum up, in the wind turbine with double wind rotor mechanism, the main wind rotor with larger diameter is used for power generation, and the auxiliary wind rotor with smaller diameter is used for adjusting the excitation frequency and generating power. The two rotate on the same axis and in opposite directions. , the yaw controller is responsible for controlling the main wind rotor to rotate against the wind in the downwind direction, and the main power generation;

The voltage output terminal of the generator is equipped with a grid-connected frequency converter and other configurations, which can adjust the output voltage of the generator, softly connect to the grid after the synchronization, and softly split during shutdown, which can effectively reduce the impact of grid-connected reactive current and ensure the safety of the unit running; when the generator reaches the rated output power, the unit power factor is controlled to run around cosθ=1; when the generator output active power is small, the unit outputs inductive reactive power with cosθ<1; when the generator speed is lower than the rated minimum When the speed or output power of the generator is higher than the maximum output power, the generator is decoupled from the grid, and the soft decoupling is completed through grid-connected inverter and other configurations.

A variable speed variable frequency excitation control method:

1). The main wind wheel 3 is arranged on the main drive shaft 13 to rotate at Nzr speed relative to the stator 16 with Pg pole logarithm under the action of wind force, and the speed of the main wind wheel satisfies the following relationship:

$\mathrm{<span\; class="notranslate">\; Nzr</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 60</span>}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; fg</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; fe</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; Pg</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; Pe</span>}}$

Among them: Nzr represents the speed of the main wind rotor; Pg represents the number of pole pairs of the stator winding; Pe represents the number of pole pairs of the permanent magnet outer rotor 41; fg represents the frequency of the stator; fe represents the converted frequency of the permanent magnet external rotor;

2). The auxiliary wind wheel arranged at the end of the auxiliary drive shaft 12 drives the permanent magnet outer rotor to rotate against the wind at Ne speed relative to the main wind wheel, and the converted frequency of the permanent magnet outer rotor satisfies the following relationship:

$\mathrm{fe}=\frac{\mathrm{Ne}\&times;\mathrm{<figure-callout\; id="60"\; label="Pe"\; filenames="Y20062015177800151.png"\; state="\{\{state\}\}">Pe</figure-callout>}}{60}$ Among them: Ne represents the relative speed of the auxiliary wind wheel to the stator;

3). A permanent magnet outer rotor with a Pe pole logarithm that rotates against the wind at the speed of Nzre relative to the main wind wheel is arranged on the auxiliary drive shaft. The rotational speed of the permanent magnet outer rotor relative to the inner rotor of the exciter satisfies the following relationship Formula: Nzre＝Nzr+Ne

Among them: Nzre represents the rotation speed of the permanent magnet outer rotor relative to the inner rotor of the exciter

4). The number of pole pairs of the windings of the inner rotor 45 of the exciter is set as the opposite poles of Pe; the number of pole pairs of the windings of the generator rotor 14 is set as the pair of poles of Pg; the inner rotor windings of the exciter and the generator rotor windings pass through The inter-rotor connection line 123 is connected in reverse phase sequence;

5). When the main wind rotor is lower than the rated speed, the centralized control device of the unit controls the tip speed ratio of the main wind rotor. The rotating speed is transmitted to the centralized control device 5 of the unit, and compared with the preset speed ratio value of the main wind rotor blade tip of the centralized control device of the unit, the adjustment value of the pitch angle is calculated, and then compared with the main wind rotor pitch angle measurement device G38 The collected pitch angle values are compared, and the unit centralized control device 5 issues a pitch change command to the main wind rotor pitch adjustment mechanism 38;

According to the unit centralized control device 5 $\mathrm{Nzr}=\frac{60\&times;(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$ The relational expression controls the variable speed of the main and auxiliary wind rotors; thus, the main wind rotor can be operated at the best blade tip speed ratio below the rated speed, and the purpose of fully utilizing wind energy can be achieved;

When the main wind rotor reaches the rated speed, the unit centralized control device controls the power of the generator; the output current of the generator measured by the output current detection device G3 and the output voltage of the generator measured by the output voltage measurement device G4 are transmitted to The unit centralized control device 5 compares the output power value of the generator calculated by the unit centralized control device with the preset rated power value; The wind speed measured at port D1 and the rated rotational speed of the main wind rotor measured by the rotational speed measuring device G are used to calculate the adjustment value of the pitch angle of the rated rotational speed of the main wind rotor at this wind speed, and then compared with the main wind rotor pitch angle measuring device G38 The collected pitch angle values are compared, and the unit centralized control device 5 issues a pitch command to the main wind rotor pitch adjustment mechanism 38; thus, the main wind rotor can be operated at a constant power to prevent the generator from overloading;

6). When the auxiliary wind rotor is lower than the rated speed, the centralized control device of the unit performs the speed ratio control of the auxiliary wind rotor blade tip, and the wind speed measured through the port D1 connected to the wind speed detection device is the same as that measured by the auxiliary wind rotor speed measurement device G1. The rotation speed of the auxiliary wind rotor is transmitted to the unit centralized control device 5; after comparing with the value of the auxiliary wind rotor blade tip speed ratio preset by the unit centralized control device, the adjustment value of the pitch angle is calculated, and then compared with the auxiliary wind rotor pitch The pitch angle values collected by the angle measurement device G28 are compared, and the centralized control device of the unit issues a pitch change command to the pitch adjustment mechanism 28 of the main wind rotor; Speed ratio operation to achieve the purpose of making full use of wind energy;

When the auxiliary wind wheel reaches the rated speed, the unit centralized control device controls the power of the generator; the output current of the generator measured by the output current detection device G3 and the output voltage of the generator measured by the output voltage measurement device G4 are transmitted For the unit centralized control device 5, compare the generator output power value calculated by the unit centralized control device 5 with the preset rated power value; when the preset value is met, the unit centralized control device 5 will collect the wind speed detection device The wind speed measured by the connected port D1 and the rated speed of the auxiliary wind rotor measured by the speed measuring device G are used to calculate the adjustment value of the pitch angle of the rated speed of the auxiliary wind rotor at this wind speed, and then measure the pitch angle of the auxiliary wind rotor The pitch angle value collected by the device G28 is compared, and the unit centralized control device 5 issues a pitch change command to the auxiliary wind rotor pitch adjustment mechanism 28; thus, the main wind rotor can be operated at a constant power to prevent the generator from overloading; When the generator is less than or equal to the rated speed, keep the output voltage frequency of the generator within the range of 5Hz-50Hz. The variable speed and frequency conversion operation is especially the best when the output voltage frequency of the generator is 10Hz-20H. It is rectified and reversed by the grid-connected inverter 7 Variable, so that the generator is always connected to the grid at an output voltage frequency of 50Hz, indirectly realizing the variable speed and variable frequency operation of the wind turbine;

7). Set the stator winding pole logarithm Pg to be greater than the permanent magnet outer rotor pole logarithm Pe, the relationship between the stator winding pole logarithm and the permanent magnet rotor pole logarithm is Pg=3Pe, so that the speed of the main and auxiliary wind wheels satisfies Ne＝2Nzr, in this state there is $\mathrm{Nzr}=\frac{60\&times;\mathrm{Pg}}{\mathrm{Pg}+3\mathrm{pe}},$ Therefore, the double-rotor structure of the brushless double-fed motor rotor and the rotating permanent magnet outer rotor is used to realize the variable speed and frequency conversion operation of the unit, which is equivalent to reducing the number of pole pairs of a single rotor generator with the same capacity by half.

Therefore, the two rotor windings connected in series during operation have the same current frequency and rotating magnetic fields in opposite directions. The rotational speed Nzre of the excitation magnetic field of the generator rotor winding relative to the series connected rotor is superimposed and coordinated with the mechanical rotation speed Nzr of the main wind rotor shaft to form a power generation system. The variable-speed and variable-frequency excitation magnetic field of the generator stator, the rotating magnetic field generates a 5Hz-50Hz potential in the stator winding with Pg opposite poles, and the variable-speed operation and variable-frequency power transmission of the generator set are realized by means of a grid-connected frequency converter.

8). The main wind rotor assembled on the transmission shaft 13 and the auxiliary wind rotor 2 assembled on the auxiliary transmission shaft are configured to rotate against the wind in opposite directions by adjusting the blade pitch angle in opposite directions. By making full use of the reverse-rotating wake energy behind the auxiliary wind rotor, the utilization rate of wind energy is 15%-25% higher than that of a single wind turbine with the same capacity.

9). When the series permanent magnet variable-speed variable-frequency excitation dual-rotor wind motor is connected to the grid and the speed of the main wind wheel is between the preset rated speed and the minimum speed, the auxiliary wind wheel is adjusted according to the preset condition under the adjustment of the centralized control device 5 of the unit. Rotate against the wind.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model, All still belong to within the scope of the technical solution of the utility model.

Claims (5)

1. series connection double-rotor variable speed variable frequency excitation wind-powered electricity generation machine, comprise generator main body (1), the rotor of this generator (14) is the structure setting of relative stator (16) rotation by final drive shaft (13), it is characterized in that exciter (4) is contained in the casing with the coaxial string of generator main body by the final drive shaft of device main air wheel (3); Permanent-magnetic outer rotor is to be counterrotating structure setting with exciter internal rotor (45), and this permanent-magnetic outer rotor is the structure setting of relative generator unit stator rotation; Described secondary wind wheel (2) be can drive permanent-magnetic outer rotor constructing apparatus on counter drive shaft; The drive structure device of the relative main air wheel of described secondary wind wheel reverse rotation is on counter drive shaft, and this pair wind wheel is upwind to be installed wind, and the main air wheel is assemblied on the final drive shaft axle, and wind direction was to the setting of wind rotational structure under this main air wheel was.

2. series connection double-rotor variable speed variable frequency excitation wind-powered electricity generation machine as claimed in claim 1 is characterized in that, described counter drive shaft by secondary wind wheel transmission (12) becomes the coaxial connection of the mode that can rotate mutually with the final drive shaft (13) of taking turns transmission by main air.

3. series connection double-rotor variable speed variable frequency excitation wind-powered electricity generation machine as claimed in claim 1 or 2, it is characterized in that, described major and minor power transmission shaft all has the hollow via-hole (130) of preset diameters, and this power transmission shaft supports by the bearing (115,116) and the bearing (147,148) on the exciter that are configured on the generator.

4. series connection double-rotor variable speed variable frequency excitation wind-powered electricity generation machine as claimed in claim 3 is characterized in that, leaves the default spacing (L) of avoiding secondary wind wheel and tower collision between described secondary wind wheel and the exciter.

5. series connection double-rotor variable speed variable frequency excitation wind-powered electricity generation machine as claimed in claim 4 is characterized in that, the default spacing (L) between described secondary wind wheel and the exciter is determined this spacing by the number of degrees at the main air wheel elevation angle.

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