CN202004714U - Wind-driven power generating system and excitation unit of direct-current brushless synchronous wind-driven power generator - Google Patents
Wind-driven power generating system and excitation unit of direct-current brushless synchronous wind-driven power generator Download PDFInfo
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- CN202004714U CN202004714U CN2011201198204U CN201120119820U CN202004714U CN 202004714 U CN202004714 U CN 202004714U CN 2011201198204 U CN2011201198204 U CN 2011201198204U CN 201120119820 U CN201120119820 U CN 201120119820U CN 202004714 U CN202004714 U CN 202004714U
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Abstract
The utility model discloses an excitation unit of a direct-current brushless synchronous wind-driven power generator, which is used for a wind-driven power generating system and comprises a first rectifying circuit, a control portion and an excitation power output portion. The first rectifying circuit outputs direct-current input voltage after alternating-current input voltage is rectified by the same. The control portion can detect excitation voltage and excitation current of an exciter, direct-current output voltage output by a converter of the power generating system, output voltage of any two optional phases of a stator winding of a main generator and present rotating speed of the power generator, output PWM (pulse width modulation) waves to the excitation power output portion by the aid of inner ring control of the excitation current and outer ring control of the direct-current output voltage and adjust the excitation current transmitted to the power generator. The direct-current input voltage is inverted by the excitation power output portion according to the PWM waves and is rectified into the direct-current excitation current, and the direct-current excitation current is output to a stator winding of the exciter of the power generator. According to the above structure, by adjusting capacity of the excitation current transmitted to the power generator, stable voltage output of the power generator is realized and stability of the electric power system is guaranteed.
Description
Technical field
The utility model relates to technical field of wind power generation, particularly relates to a kind of excitation unit and wind generator system of brush DC synchro wind generator.
Background technology
Generator is a most important equipment in the wind generator system.At present, the motor of wind power generation employing has two kinds substantially: asynchronous machine and synchronous machine.Dui Ying blower fan current transformer also has two kinds with it: double-fed type and total power formula.Asynchronous machine is equipped with the double-fed type current transformer, and synchronous machine is equipped with full power convertor, forms two kinds of different wind turbine generator.For any wind-driven generator, the realization of excitation control all is vital.Especially for brushless excitation synchronous generator, brushless excitation system is that it is most crucial, the part of most critical.
Usually, generator needs a rotating magnetic field (most no-brush synchronous generator group all is a revolving-field type) when rotating, this magnetic field majority is to be formed by rotor coil by DC power supply, to set up D.C. magnetic field, be referred to as the exciting power output usually.In addition, keep constant substantially, also need an energy to change the adjuster of adjusting this DC power supply output with generator voltage in order to make generator set end voltage when the load variations.This two aspect is exactly the task that excitation controlling device will be finished.
Stablizing of generator output voltage is to realize by the size of controlling exciting current.The excitation controlling device of generator is exactly variation and other input signal that is used to gather generator voltage and electric current, and controls the exciting current of supply generator rotor coil according to control criterion.The ability that the excitation control of generator moves for the voltage levvl of keeping electric power system, raising power system stability, the service conditions of improving electric power system and generator etc. play important effect.
Therefore, how realizing the excitation control to generator, particularly at the excitation control of brush DC synchro wind generator, realize the stable of generator output voltage, ensure the stability of electric power system, is the technical problem that those skilled in the art are badly in need of solving.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of excitation unit and wind generator system of brush DC synchro wind generator, can be delivered to the size of the exciting current of described generator by adjusting, realize the stable of generator output voltage, ensure the stability of electric power system.
The utility model embodiment provides a kind of excitation unit of brush DC synchro wind generator, be used for brush DC synchronous wind generating system, described wind generator system comprises: brush DC synchro wind generator and current transformer that exciter is coaxial with main generator;
Described current transformer has not control rectifying circuit of three-phase, and described three-phase is the input termination main generator unit stator winding of control rectifying circuit not, is used for the three-phase output voltage rectification to described generator, and the output VD is to described excitation unit;
Described excitation unit comprises: first rectification circuit, exciting power output and control section;
Described first rectification circuit is used for after the AC-input voltage rectification, and the output DC input voitage is to described exciting power output;
Described control section, detection obtains the exciting voltage of described exciter and exciting current, described the three-phase not VD of control rectifying circuit output and the output voltage and the current rotating speed of generator of any two-phase of main generator unit stator winding, by ring control in the exciting current and the control of VD outer shroud, output PWM ripple is regulated the exciting current that described exciting power output is delivered to described generator to described exciting power output;
Described exciting power output, according to the PWM ripple that is received from described control section, the DC input voitage of described first rectification circuit output carried out inversion after, rectification is the DC excitation electric current again, exports the exciter stator winding of generator to.
Preferably, described control section comprises: controller, speed detect circuit, sampling modulate circuit, communication interface circuit and auxiliary power circuit;
Described sampling modulate circuit is used to detect the exciting voltage that obtains exciter and exciting current, the three-phase not VD of control rectifying circuit output and the voltage of any two-phase output of main generator unit stator winding, exports described controller to;
Described speed detect circuit is used to detect the current rotating speed that obtains generator, exports described controller to;
Described controller, be used for according to the exciting voltage of the described exciter that receives and exciting current, described the three-phase not VD of control rectifying circuit output and the voltage and the current rotating speed of generator of any two-phase output of main generator unit stator winding, by ring control in the exciting current and the control of VD outer shroud, obtain exporting the duty ratio that needs, and the PWM ripple of generation and described duty ratio corresponding pulses width, export described exciting power output to;
Described communication interface circuit is used to realize that described excitation unit is connected with the communication of generator converter;
Described auxiliary power circuit is used to described controller, described pulse control circuit, described communication interface circuit, described sampling modulate circuit that working power is provided.
Preferably, described controller comprises: first subtracter, first pi regulator, adjustment factor computing unit, second subtracter, second pi regulator, PWM generator;
The positive input terminal of described first subtracter receives given reference voltage, and negative input end receives described three-phase, and control rectifying circuit is not through the VD of sampling modulate circuit output, and output is exported first comparative result to described first pi regulator;
Described first pi regulator is exported first result of calculation to described adjustment factor computing unit after described first comparative result is carried out increment type PI calculating;
Described adjustment factor computing unit, the current rotating speed of the described generator that obtains according to detection, set the adjustment factor of described VD under the described current rotating speed, and with the product of described first result of calculation and described adjustment factor, as the exciting current set-point, export the positive input terminal of described second subtracter to;
The positive input terminal of described second subtracter receives described exciting current set-point, and negative input end receives the exciting current that described sampling conditioning voltage detecting obtains, and output is exported second comparative result to described second pi regulator;
After described second pi regulator carried out increment type PI calculating to described second comparative result, the dutyfactor value that output needs was to described PWM generator;
Described PWM generator produces the PWM ripple of corresponding pulses width according to described dutyfactor value, and exports described exciting power output to.
Preferably, described controller is motor control chip dsPIC30F4011.
Preferably, described communication interface circuit comprises: CAN interface circuit and serial interface circuit;
Described controller links to each other with described current transformer by the CAN interface circuit;
Described controller links to each other with host computer by the serial interface circuit.
Preferably, described auxiliary power circuit is the single-end flyback switching power supply that high frequency transformer and chip for driving UC3844 form.
Preferably, described exciting power output comprises: pulse control circuit, high-frequency pulse transformer, second rectification circuit;
Described pulse control circuit is used for according to the PWM ripple that is received from described control section, the DC input voitage of described first rectification circuit output is carried out inversion, and export the alternating voltage that inversion obtains to described high-frequency pulse transformer;
Described high-frequency pulse transformer is used for exporting described second rectification circuit to after the described alternating voltage step-down;
Described second rectification circuit, being used for the ac voltage rectifier after the described step-down is the DC excitation electric current, exports described exciter stator winding to.
Preferably, described exciting power output also comprises: filtering and freewheeling circuit;
Described filtering and freewheeling circuit are connected on the output of described second rectification circuit, after being used for DC excitation electric current to the output of described second rectification circuit and carrying out filtering, export described exciter stator winding again to.
Preferably, described excitation unit also comprises: the EMI filter circuit;
Described EMI filter circuit is used for described AC-input voltage is carried out filtering, delivers to described first rectification circuit again and carries out rectification.
The utility model embodiment also provides a kind of brush DC synchronous wind generating system, and described system comprises: exciter and the coaxial brush DC synchro wind generator that is connected of main generator, current transformer and described excitation unit;
Described excitation unit provides exciting current for described brush DC synchro wind generator
According to the specific embodiment that the utility model provides, the utility model discloses following technique effect:
Among the utility model embodiment, described control section obtains the exciting voltage and the exciting current of described generator according to detection, described three-phase is the VD of control rectifying circuit output not, and the output voltage of any two-phase of main generator unit stator winding, and generator speed, adopt ring control and the control of VD outer shroud in the exciting current, export corresponding PWM ripple to described exciting power output, regulate the exciting current that described exciting power output is delivered to described generator, make the output voltage stabilization of generator, improve the stability of power system operation.
The described excitation unit of the utility model embodiment, directly do not follow the tracks of the output end voltage of described generator, but the VD that the three-phase voltage of being devoted to stablize described generator output or not after the control rectifying circuit rectification through described three-phase, can effectively improve the dynamic quality of system, realize inversion grid connection work for current transformer reliable guarantee is provided.
Description of drawings
Fig. 1 is the excitation unit structure chart of the brush DC synchro wind generator of the utility model embodiment;
Fig. 2 is the controller architecture figure of the utility model embodiment;
Fig. 3 is the circuit structure diagram of the auxiliary power circuit of the utility model embodiment;
Fig. 4 is the circuit structure diagram of the exciting power output of the utility model embodiment;
Fig. 5 a is the circuit structure diagram of first sample circuit of the utility model embodiment;
Fig. 5 b is the circuit structure diagram of second sample circuit of the utility model embodiment;
Fig. 5 c is the circuit structure diagram of the 3rd sample circuit of the utility model embodiment;
Fig. 6 is the circuit structure diagram of the synchronous square wave translation circuit of the utility model embodiment.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
In view of this, the purpose of this utility model is to provide a kind of excitation unit and wind generator system of brush DC synchro wind generator, can be delivered to the size of the exciting current of described generator by adjusting, realize the stable of generator output voltage, ensure the stability of electric power system.
With reference to Fig. 1, the excitation unit structure chart of the brush DC synchro wind generator that provides for the utility model embodiment.
Need to prove that the excitation unit that the utility model embodiment provides is used for brush DC synchronous wind generating system, in particular for having the wind generator system of the coaxial brush DC synchro wind generator of exciter and main generator.
Concrete, among the utility model embodiment, be that example describes with wind generator system shown in Figure 1.But, in actual applications, the generator that excitation unit described in the utility model is suitable for can but be not limited to shown in Figure 1.
Described wind generator system can comprise: brush DC synchro wind generator 1 and current transformer 3.Wherein, the exciter of described generator 1 is connected with main generator is coaxial.
As shown in Figure 1, described generator 1 comprises: exciter 11, rotating rectifier 12 and main generator 13.Wherein, described exciter 11 and main generator 13 are by described 12 coaxial connections of rotating rectifier.
Concrete, as shown in Figure 1, described exciter 11 comprises: exciter stator winding and exciter rotor armature; Described main generator 13 comprises: main generator rotor armature and main generator unit stator winding.Wherein, described exciter rotor armature and main generator rotor armature are by described 12 coaxial connections of rotating rectifier; Described exciter stator winding receives the excitation output of described excitation unit 2 as the load of excitation unit 2.
Described current transformer 3 has not control rectifying circuit 32 of three-phase, described three-phase is the main generator unit stator winding of the described generator 1 of input termination of control rectifying circuit 32 not, receive U, V, the W three-phase output voltage of described generator 1, and to after the described three-phase output voltage rectification, Udc is to described excitation unit 2 for the output VD.
As shown in Figure 1, the described excitation unit 2 of the utility model embodiment can comprise: first rectification circuit 23, exciting power output and control section.
Described first rectification circuit 23 is used for after the AC-input voltage rectification, and the output DC input voitage is to described exciting power output.
Need to prove, described AC-input voltage can be provided by working power (shown among Fig. 1 21), the AC-input voltage of described working power 21 outputs is after 23 rectifications of described first rectification circuit, and the output DC input voitage is to described exciting power output.
Described control section, detection obtains the exciting voltage Uf and the exciting current If of described exciter 11, described three-phase is the VD Udc of control rectifying circuit 32 outputs not, and the output voltage of any two-phase of main generator unit stator winding, and the current rotating speed of generator, by ring control in the exciting current And if the control of VD Udc outer shroud, output PWM ripple is to described exciting power output, regulate the exciting current that described exciting power output is delivered to described generator 1, make the output voltage stabilization of generator 1, improve the stability of power system operation.
Described exciting power output is according to the pwm pulse that is received from described control section, the DC input voitage of described first rectification circuit 23 outputs is carried out inversion after, rectification is the DC excitation electric current again, exports the exciter stator winding to.
Concrete, as shown in Figure 1, described control section can comprise: controller 28, speed detect circuit 30, sampling modulate circuit 31, communication interface circuit 33 and auxiliary power circuit 27.
Wherein, described controller 28 is the core of described control section, and it can adopt DSP (Digital Signal Processing, Digital Signal Processing) processor to realize.
Described sampling conditioning voltage 31, be used to detect the exciting voltage Uf that obtains exciter 11 and exciting current If, three-phase not the VD Udc of control rectifying circuit 32 outputs and the voltage of any two-phase output of main generator unit stator winding, export described controller 28 to.
Need to prove, among Fig. 1, detect the voltage of any two-phase output of the main generator unit stator winding that obtains for described sampling conditioning voltage 31, is that example describes with the line voltage U ac of V, W two-phase.Certainly, in other embodiment of the utility model, can also detect the line voltage of the line voltage that obtains U, V two-phase or U, W two-phase.
Described speed detect circuit 30 is used to detect the current rotating speed that obtains generator 1, exports described controller 28 to.
Described controller 28, be used for according to the exciting voltage Uf of the described exciter 11 that receives and exciting current If, described three-phase not the VD Udc of control rectifying circuit 32 outputs and the output voltage and the generator speed of any two-phase of main generator unit stator winding, by ring control in the exciting current And if the control of VD Udc outer shroud, obtain exporting the duty ratio that needs, and PWM (the Pulse Width Modulation of generation and described duty ratio corresponding pulses width, pulse width modulation) ripple exports described exciting power output to.
Described communication interface circuit 33 is used to realize that described excitation unit 2 is connected with communication between the current transformer 3.
Need to prove that described communication interface circuit 33 can be made up of CAN (Controller Area Network, controller local area network) interface circuit and serial interface circuit part.Be connected by the CAN interface circuit between described controller 28 and the current transformer 3, adopt the CAN bus to communicate, to coordinate the work of described excitation unit; Described controller 28 is connected with host computer by the serial interface circuit, realizes communication, so that program maintenance.Described host computer is used to realize that the operating state to whole brush DC synchro wind generator excitation system controls.
Described auxiliary power circuit 27 is used to described controller 28, described pulse control circuit 24, described communication interface circuit 33, described sampling modulate circuit 31 that working power is provided.
Need to prove that when described controller 28 was dsp processor, described speed detect circuit 30 can be realized by synchronous square wave translation circuit.
Concrete, the square wave translation circuit receives the line voltage that described sampling conditioning voltage 31 detects any two-phase output of the main generator unit stator winding that obtains synchronously, be and the identical square-wave signal of described line voltage cycle to be input to the capture-port of described dsp processor with described line voltage transitions.Described dsp processor is according to catching the described square-wave signal that obtains, the cycle of obtaining this square-wave signal; Because the cycle of the line voltage of any two-phase output of described square-wave signal and main generator unit stator winding is identical, thereby can access the cycle of generator, and be translated into the frequency of generator, and and then conversion obtain the rotating speed of generator.The specific implementation of described synchronous square wave translation circuit elaborates below again.
Preferably, described control section can also comprise: switching value imput output circuit 29.
Described switching value imput output circuit 29 1 termination current transformers 3, another termination controller 28.When current transformer 3 detects outsidely unusual, and during the communication disruption between current transformer 3 and the excitation unit, current transformer 3 can send to turn-off and control signal to described switching value imput output circuit 29; When eliminated unusually the outside, described current transformer 3 sent to open and controls signal to described switching value imput output circuit 29.
Described switching value imput output circuit 29 is used to receive when turn-offing control signal, directly turn-offs the exciting current output of described excitation unit by controller 28; Receive when opening control signal, open described excitation unit by controller 28.
As shown in Figure 1, described exciting power output can comprise: pulse control circuit 24, high-frequency pulse transformer 25, second rectification circuit 26.
Described pulse control circuit 24 is used for according to the pwm pulse that is received from described control section, the DC input voitage of described first rectification circuit 23 outputs is carried out inversion, and export the alternating voltage that inversion obtains to described high-frequency pulse transformer 25.
Described high-frequency pulse transformer 25 is used for exporting described second rectification circuit 26 to after the described alternating voltage step-down.
Described second rectification circuit 26 is the DC excitation electric current with the ac voltage rectifier after the described step-down, exports described exciter stator winding to.
The operation principle of the excitation unit 2 of the described brush DC synchro wind generator of the utility model embodiment is:
Under certain wind speed, the blower fan leaf oar of synchro wind generator 1 begins rotation by the main shaft that gearbox drives generator 1, and two armature rotors are arranged on this main shaft, is respectively exciter rotor armature and main generator rotor armature.Described exciter rotor armature links to each other with described main generator rotor armature by described rotating rectifier 12.Described excitation unit 2 is by detecting the terminal voltage (the terminal voltage Uac with V, W two-phase in the present embodiment is that example describes) of 13 two-phases of main generator, utilize the frequency of the capture-port detection main generator 13 of controller 28, and utilize relation between rotating speed of motor and number of pole-pairs, the frequency to calculate the rotating speed of main generator 13, detect the not VD Udc of control rectifying circuit 32 outputs of three-phase simultaneously, import corresponding DC excitation electric current I f for the exciter stator winding according to the characteristic of motor.After the rotating speed of generator reached a certain particular value, the three-phase not VD Udc of control rectifying circuit 32 outputs was stablized.PWM ripple by controller 28 control EDM Generator of Adjustable Duty Ratio joints, and then the break-make of the switching tube in the control impuls control circuit 24, thereby realize the Energy Controllable of input high-frequency pulse transformer 25, through high-frequency pulse transformer 25 this energy is dropped to suitable voltage levvl again, export the exciter stator winding of generator 1 to, thereby realize that exciting current If is adjustable.
Because the exciter stator winding is big inductive load, the pulsed quantity of high frequency transformer 25 outputs can be converted to direct current, realize DC excitation.This direct current If forms a directional magnetic field on the exciter stator winding.When the exciter rotor armature rotates with blower fan leaf oar, in the exciter rotor armature, will produce one group of three-phase alternating current, this three-phase alternating current is after being fixed on rotating rectifier 12 rectifications on the generator shaft, output DC flows in the main generator rotor armature, thereby sets up rotating magnetic field in main generator 13.At this moment, the coil of main generator unit stator winding begins to cut the magnetic line of force of this rotating magnetic field, according to the law of electromagnetic induction, will in the main generator unit stator winding, produce the voltage output of alternation, the final blower fan of realizing generates electricity, send three-phase electricity and do not detected by excitation unit 2 after control rectifying circuit 32 rectifications through described three-phase, realize the outer shroud control of VD Udc, the VD Udc of control rectifying circuit 32 outputs is unstable, controlled thereby make described three-phase.
With reference to Fig. 2, the controller architecture figure that provides for the utility model embodiment.Described controller 28 comprises: first subtracter 283, a PI (proportional integral) adjuster 284, adjustment factor computing unit 282, second subtracter 285, second pi regulator 286, PWM generator 287.
Wherein, the positive input terminal of described first subtracter 283 receives described given reference voltage Ug, its negative input end receives described three-phase, and control rectifying circuit 32 is not through the VD Udc of sampling modulate circuit 31 outputs, and its output is exported first comparative result to described first pi regulator 284.
After 284 pairs of described first comparative results of described first pi regulator carry out increment type PI calculating, export first result of calculation to described adjustment factor computing unit 282.
Described adjustment factor computing unit 282, the current rotating speed of the described generator 1 that obtains according to detection, set the adjustment factor of VD Udc under this current rotating speed, and will be received from first result of calculation of described first pi regulator 284 and the product of described adjustment factor, as exciting current set-point Ig, export the positive input terminal of described second subtracter 285 to.
Concrete, the rotation speed n of generator 1 is carried out interval division, set the adjustment factor of corresponding VD Udc respectively for the rotating speed in every interval.For example, rotation speed n can be divided into 5 intervals, the corresponding respectively adjustment factor in each interval is Ki (i=1,2,3,4,5), and is specific as follows:
When n＜1200rpm/min, the setting adjustment factor is K1;
When 1200rpm/min＜n＜1400rpm/min, the setting adjustment factor is K2;
When 1400rpm/min＜n＜1600rpm/min, the setting adjustment factor is K3;
When 1600rpm/min＜n＜1800rpm/min, the setting adjustment factor is K4;
When 1800rpm/min＜n＜2000rpm/min, the setting adjustment factor is K5.
Described adjustment factor computing unit 282, the interval at the current rotating speed place of the generator 1 that obtains according to detection, determine the adjustment factor of the VD Udc of this current rotating speed correspondence, and first result of calculation and the described adjustment factor that will be received from described first pi regulator 284 multiply each other, the product that obtains exports the positive input terminal of described second subtracter 285 to as exciting current set-point Ig.
The positive input terminal of described second subtracter 285 receives the exciting current set-point Ig of described adjustment factor computing unit 282 outputs, its negative input end receives described sampling conditioning voltage 31 and detects the exciting current If that obtains, and its output is exported second comparative result to described second pi regulator 286.
After 286 pairs of described second comparative results of described second pi regulator carried out increment type PI calculating, the dutyfactor value that output needs was to described PWM generator 287.
Described PWM generator 287 exports described exciting power output to according to the PWM ripple of described dutyfactor value generation corresponding pulses width.
Control the break-make of switch mosfet pipe in the described pulse control circuit 24 by described PWM ripple, thereby regulate the size of electric current in the exciter stator winding of input generator 1, stablize the output voltage of main generator unit stator winding.
Among the utility model embodiment, described control section obtains the exciting voltage Uf and the exciting current If of described exciter 11 according to detection, described three-phase is the VD Udc of control rectifying circuit 32 outputs not, and the output voltage of any two-phase of main generator unit stator winding, and generator speed, adopt ring control and the control of VD Udc outer shroud in the exciting current If, export corresponding PWM ripple to described exciting power output, regulate the exciting current that described exciting power output is delivered to described generator 1, make the output voltage stabilization of generator 1, improve the stability of power system operation.
The described excitation unit of the utility model embodiment, directly do not follow the tracks of the output end voltage of described generator 1, but the VD Udc that the three-phase voltage of being devoted to stablize described generator 1 output or not after control rectifying circuit 32 rectifications through described three-phase, can effectively improve the dynamic quality of system, realize inversion grid connection work for current transformer 3 reliable guarantee is provided.
Need to prove that among the utility model embodiment, described controller 28 can adopt the dsp chip dsPIC30F4011 at motor and motion control field to realize.Described excitation unit can make full use of this dsp chip rich in natural resources, and combines with the dsp software programming, is easy to realize various control algolithms and multiple communication mode, has improved the reliability and the response real-time of excitation unit.Described dsp chip dsPIC30F4011 can pass through the dutyfactor value that the direct given output of register needs, thereby realize the rapid and reliable output on a large scale of exciting current, under the fast situation of wind speed variation, still can export stable VD Udc to adapt to wind-driven generator.
Preferably, the described excitation unit of present embodiment can also comprise: AC transformer 22.Described AC transformer 22 is connected between the described working power 21 and first rectification circuit 23, the AC-input voltage of described working power 21 outputs is imported described first rectification circuit 23 again and is carried out rectification after described AC transformer 22 arrives the electric pressure of regulation with voltage transformation.
Further, the described excitation unit of present embodiment can also comprise: EMI (Electromagnetic Interference, electromagnetic interference) filter circuit 34.Described EMI filter circuit 34 can be connected between described alternating current depressor 22 and described first rectification circuit 23, after being used for the AC-input voltage after described alternating current depressor 22 transformations carried out filtering, delivers to described first rectification circuit 23 again and carries out rectification.
Certainly, in the embodiment of the invention, can also only comprise the EMI filter circuit, described EMI filter circuit can directly be connected between the described working power 21 and first rectification circuit 23, be used for AC-input voltage is carried out filtering, deliver to described first rectification circuit 23 again and carry out rectification.
Among the utility model embodiment, described auxiliary power circuit 27 is used to described controller 28, described pulse control circuit 24, described communication interface circuit 33, described sampling modulate circuit 31 that working power is provided.
In actual applications, described auxiliary power circuit 27 can be independent power supply, is respectively each circuit required working power is provided; Described auxiliary power circuit 27 can also utilize the DC input voitage of described first rectification circuit 23 outputs, be transformed to each circuit required working power is provided, make that the exciting power output of described excitation unit and the power supply of control section all are to be provided by same working power 21, save power supply.
Referring to Fig. 3, the circuit structure diagram of the auxiliary power circuit that provides for the utility model embodiment.Described auxiliary power circuit 27 adopts high frequency transformer and chip for driving UC3844 to form single-end flyback switching power supply.
As shown in Figure 3, described high frequency transformer has a plurality of secondary winding, and each secondary winding has one tunnel output.
The output of described first rectification circuit 23 of input termination of the elementary winding of described transformer, the AC-input voltage of described working power 21 outputs, after the electric pressure conversion of the described AC transformer 22 and first rectification circuit 23, rectification, the DC input voitage of output is added on the elementary winding of transformer T of described Switching Power Supply; The break-make of described chip for driving UC3844 control switch pipe Q1 transfers energy to the Secondary winding of transformer of Switching Power Supply.
When switching tube Q1 conducting, the elementary winding of this transformer absorbs the energy electric energy from the output of described first rectification circuit 23; When switching tube Q1 turn-offed, this transformer was a magnetic energy with electric energy conversion, was delivered on each secondary winding of transformer of this Switching Power Supply.
The output of the first secondary winding W1 of this transformer is after chip U7805CV voltage stabilizing, and output DC+5V voltage is given described controller 28 power supplies.
The second subprime winding W2 of this transformer and the output of level winding W3 for the third time are respectively after chip U7815CV and U7915CV voltage stabilizing, output DC+15V and DC-15V voltage, give described sampling modulate circuit 31 power supplies, thereby the voltage of guaranteeing to export to described controller 28 is stable.
The 4th secondary winding W4 of this transformer, the 5th secondary winding W5 and the 6th secondary winding W6 are output as not the three paths of independent on ground+20V voltage altogether, as the working power of switching tube chip for driving in the described pulse control circuit 24.
Among the utility model embodiment, adopt auxiliary power circuit 27 shown in Figure 3, make that the exciting power output of this excitation unit and the power supply of control section all are to be provided by same working power 21, by each circuit module power supply that is designed to described control section of switching power circuit.Compare with being respectively the DC-DC power supply that each circuit module is provided with corresponding specification one by one, can save design cost greatly, simplify circuit structure, reduce requirement, make that the integration of described excitation unit is higher environment for use.
Simultaneously, among the utility model embodiment, described Switching Power Supply allows the excursion of input voltage wide, makes that the output of this excitation unit is adjustable on a large scale, make described brushless synchronous wind power generator under the big situation of wind speed excursion, still can export stable VD Udc.
With reference to Fig. 4, the circuit structure diagram of the exciting power output that provides for the utility model embodiment.As shown in Figure 1, described exciting power output comprises: pulse control circuit 24, high-frequency pulse transformer 25, second rectification circuit 26.
Described pulse control circuit 24 is used for according to the pwm pulse that is received from described control section, the DC input voitage of described first rectification circuit 23 outputs is carried out inversion, and export the alternating voltage that inversion obtains to described high-frequency pulse transformer 25.
Described high-frequency pulse transformer 25 is used for exporting described second rectification circuit 26 to after the described alternating voltage step-down.
Described second rectification circuit 26 is the DC excitation electric current with the ac voltage rectifier after the described step-down, exports described exciter stator winding to.
In conjunction with Fig. 4, described pulse control circuit 24 can comprise: signal drive circuit 241, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, the 5th metal-oxide-semiconductor Q5.
The pwm pulse signal of described controller 28 outputs of the input termination of described signal drive circuit 241, the grid of the described second metal-oxide-semiconductor Q2 of output termination of described signal drive circuit 241, the grid of the 3rd metal-oxide-semiconductor Q3, the grid of the 4th metal-oxide-semiconductor Q4 and the grid of the 5th metal-oxide-semiconductor Q5.
Wherein, the drain electrode short circuit of the drain electrode of the described second metal-oxide-semiconductor Q2 and described the 4th metal-oxide-semiconductor Q4 connects first output of described first rectification circuit 23 jointly.
The source electrode of the described second metal-oxide-semiconductor Q2 connects the drain electrode of described the 3rd metal-oxide-semiconductor Q3, first end of the elementary winding of the described high-frequency pulse transformer 25 of its public termination.
The source electrode of described the 4th metal-oxide-semiconductor Q4 connects the drain electrode of described the 5th metal-oxide-semiconductor Q5, second end of the elementary winding of the described high-frequency pulse transformer 25 of its public termination.
The drain electrode short circuit of the drain electrode of described the 3rd metal-oxide-semiconductor Q3 and described the 5th metal-oxide-semiconductor Q5 connects second output of described first rectification circuit 23 jointly.
As shown in Figure 4, described second rectification circuit 26 of the utility model embodiment can be a rectifier bridge of being made up of four diodes.Concrete, described second rectification circuit 26 can comprise: the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4.
Wherein, the negative electrode of the described first diode D1 connects the anode of the described second diode D2; The negative electrode of the described second diode D2 connects the anode of described the 3rd diode D3; The negative electrode of described the 3rd diode D3 connects the anode of described the 4th diode D4; The negative electrode of described the 4th diode D4 connects the anode of the described first diode D1.
First end of the secondary winding of the described high-frequency pulse transformer 25 of public termination of the described first diode D1 and the second diode D2; Second end of the secondary winding of the described high-frequency pulse transformer 25 of public termination of described the 3rd diode D3 and the 4th diode D4.
The common port of described first diode D1 and the 4th diode D4 is as the positive output end of described pulse control circuit, also is the positive output end of described excitation unit (see among Fig. 4 shown in the Idc+); The common port of described second diode D2 and the 3rd diode D3 is as the negative output terminal of described pulse control circuit, also is the negative output terminal of described excitation unit (see among Fig. 4 shown in the Idc-).
Preferably, described exciting power output can also comprise: filtering and freewheeling circuit 35, described filtering and freewheeling circuit 35 are connected on the output of described second rectification circuit 26, after being used for DC excitation voltage to described second rectification circuit 26 output and carrying out filtering, be re-used as the excitation output of described excitation unit, export described exciter stator winding to.
Described filtering and freewheeling circuit 35 can be a resistance capaciting absorpting circuit.Concrete, described filtering and freewheeling circuit 35 can comprise: first resistance R 1, first capacitor C 1 and the 5th diode D5.Wherein, described first resistance R 1 is with after described first capacitor C 1 is connected, and is connected between the positive output end and negative output terminal of described pulse control circuit; The negative electrode of described the 5th diode D5 connects the positive output end of described pulse control circuit, and the anode of described the 5th diode D5 connects the negative output terminal of described pulse control circuit.
Set forth the operation principle of described exciting power output below in conjunction with Fig. 4:
The DC input voitage of described first rectification circuit 23 outputs is as the input of described pulse control circuit 24.Described pulse control circuit 24 is made up of signal drive circuit 241 and switching tube, by the PWM ripple of the certain duty ratio of described controller 28 controls, through the break-make of signal drive circuit 241 control switch pipes.
Need to prove, as two switching tubes the 3rd metal-oxide-semiconductor Q3 and the 5th metal-oxide-semiconductor Q5 of the following brachium pontis of described pulse control circuit 24, when not receiving pwm pulse signal, be high conducting state always.Can play effect like this into the elementary winding afterflow of described high-frequency pulse transformer 25.
The PWM ripple of described controller 28 outputs is a center symmetrical complement type, and has fixedly dead band, can avoid same brachium pontis straight-through up and down of described pulse control circuit 24 like this.
The energy of the switching tube output of described pulse control circuit 24 outputs to the exciter stator winding through described second rectification circuit 26, filtering and freewheeling circuit 35 and reverse fast recovery diode again after described high-frequency pulse transformer 25 conversion.Described exciter stator winding is a big inductive load, as long as the PWM wave period of described controller 28 outputs is much smaller than the time constant of load, just the output pulsed quantity of described high-frequency pulse transformer 25 can be filtered into direct current, thereby realize the DC excitation of synchronous generator.
The described sampling modulate circuit 31 of the utility model embodiment, be used to detect the exciting voltage Uf that obtains exciter 11 and exciting current If, three-phase not the VD Udc of control rectifying circuit 32 outputs and the output voltage of any two-phase of main generator unit stator winding, and after detection obtained each signal and carry out respective handling, export described controller 28 to.
Described sampling modulate circuit 31 comprises: first sample circuit, second sample circuit and the 3rd sample circuit.With reference to Fig. 5 a to 5c, be respectively the circuit structure diagram of first sample circuit, second sample circuit and the 3rd sample circuit of the utility model embodiment.
Described first sample circuit is used to detect the output voltage that obtains between any two-phase of main generator unit stator winding, and after this voltage carried out respective handling, exports described controller 28 to.
Shown in Fig. 5 a, described first sample circuit of the utility model embodiment can comprise:
One end of one end of second resistance R 2 and the 3rd resistance R 3 connect respectively described main generator unit stator winding any one mutually, the other end of the R3 of the other end of described second resistance R 2 and described the 3rd resistance all connects the input of the first Hall voltage transducer.
One end of output termination the 4th resistance R 4 of the described first Hall voltage transducer, the stiff end of another termination adjustable resistance W1 of described the 4th resistance R 4.
The 5th resistance R 5, the 6th resistance R 6, and second capacitor C 2 all be connected in parallel between the output and ground of the described first Hall voltage transducer.
Another stiff end of described adjustable resistance W1 is through the 7th resistance R 7 ground connection, and the sliding end of described adjustable resistance W1 connects the positive input terminal of the first voltage follower U1 through the 8th resistance R 8.
One end of output termination the 9th resistance R 9 of the described first voltage follower U1, the negative input end of the described first voltage follower U1 and its output short circuit; The positive input terminal of the described first voltage follower U1 is through the 3rd capacitor C 3 ground connection.
One end of another termination the tenth resistance R 10 of described the 9th resistance R 9 and an end of the 11 resistance R 11; Another termination working power Vrer of described the tenth resistance R 10; One end of another termination the 4th capacitor C 4 of described the 11 resistance R 11 and an input of described controller 28.
The other end ground connection of described the 4th capacitor C 4.
Shown in Fig. 5 a, the output voltage of any two-phase of described main generator unit stator winding (among Fig. 5 a only the voltage U ac with U, V two-phase be that example describes) is through the described first Hall voltage transducer of input after second resistance R 2 and the 3rd resistance R 3 dividing potential drops; The described first Hall voltage transducer is a weak electric signal with the forceful electric power conversion of signals that receives, and plays the effect that forceful electric power and light current are isolated simultaneously; Signal after described first Hall voltage transducer conversion passes through dividing potential drop, capacitance-resistance filter (the 5th resistance R 5, the 6th resistance R 6 and second capacitor C 2), the described first voltage follower U1 and the voltage lifting circuit subsequently of described adjustable resistance W1, the 4th resistance R 4, the 7th resistance R 7 again, is input to controller 28 at last.Described controller 28 is built-in with 10 bit A/D converters, sample to the received signal, its sample frequency can be provided with by described controller 28, and the highest sample frequency can reach 1MHz, satisfied the requirement of sampling precision and speed, the guarantee of necessity is provided for the real-time of control.
Wherein, voltage lifting circuit is made of the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R 11, is used for avoiding occurring negative value voltage between conversion of signals to the 0～5V with first voltage follower U1 output.
Described second sample circuit is used to detect and obtains the not VD Udc of control rectifying circuit 32 output of three-phase, and after described VD Udc carried out respective handling, exports described controller 28 to.
Shown in Fig. 5 b, described second sample circuit of the utility model embodiment can comprise:
One end of the 12 resistance R 12 and an end of the 13 resistance R 13 connect described the three-phase not positive output end and the negative output terminal of control rectifying circuit 32 respectively, and the other end of described the 12 resistance R 12 and the other end of described the 13 resistance R 13 all connect the input of the second Hall voltage transducer.
The output of the described second Hall voltage transducer connects the positive input terminal of the described second voltage follower U2 through described the 14 resistance R 14.
One end of output termination the 15 resistance R 15 of the described second voltage follower U2, the negative input end of the described second voltage follower U2 and its output short circuit; The positive input terminal of the described second voltage follower U2 is through the 5th capacitor C 5 ground connection.
One end of another termination the 6th capacitor C 6 of described the 15 resistance R 15 and an input of described controller 28.
The other end ground connection of described the 6th capacitor C 6.
The principle of described second sample circuit is similar to first sample circuit, and difference only is that described second sample circuit does not have voltage lifting circuit, does not repeat them here.
Described the 3rd sample circuit is used to detect the exciting voltage Uf and the exciting current If that obtain exciter 11, and after described exciting voltage Uf and exciting current If carried out respective handling, exports described controller 28 to.
Shown in Fig. 5 c, described the 3rd sample circuit of the utility model embodiment can comprise:
Current sensor is connected in series with the positive input terminal of described exciter stator winding, an end of output termination the 16 resistance R 16 of described current sensor and an end of the 8th capacitor C 8.
One end of another termination the 7th capacitor C 7 of described the 16 resistance R 16 and an input of described controller 28.
The other end ground connection of described the 7th capacitor C 7; The other end ground connection of described the 8th capacitor C 8.
The negative input end of the described exciter stator winding of one termination of the 17 resistance R 17, the positive input terminal of the described exciter stator winding of a termination of the 19 resistance R 19.
The other end of described the 17 resistance R 17 connects the input of tertiary voltage transducer U3 through the 18 resistance R 18, and the other end of described the 19 resistance R 19 connects another input of described tertiary voltage transducer U3 through the 20 resistance R 20.
One end of output termination the 21 resistance R 21 of described tertiary voltage transducer U3 and an input of described controller 28.
The other end ground connection of described the 21 resistance R 21.
Need to prove, voltage sensor in described the 3rd sample circuit can adopt Hall current type voltage sensor, by resistance the 17 resistance R the 17, the 18 resistance R the 18, the 19 resistance R the 19, the 20 resistance R 20 voltage to be measured (being the voltage at exciter stator winding two ends) is converted to electric current, to improve jamproof intensity.Be converted to little current signal through Hall current type voltage sensor again,, import the AD converter of described controller 28 inside and sample after the 21 resistance R 21 converts voltage signal to.Wherein, the current sensor that is used to detect described exciting current If can adopt contactless Hall current sensor, to reach the effect of isolation.
Among the utility model embodiment, when described speed detect circuit 30 was realized by synchronous square wave translation circuit, described synchronous square wave translation circuit can be as shown in Figure 6.
With reference to Fig. 6, be the circuit structure diagram of the synchronous square wave translation circuit of the utility model embodiment.Described synchronous square wave translation circuit 30 can comprise:
One end of the 22 resistance R 22 and an end of the 23 resistance R 23 connect respectively described main generator unit stator winding any one mutually, the other end of the other end of described the 22 resistance R 22 and the R23 of described the 23 resistance all connects the input of the 4th Hall voltage transducer.
The output of described the 4th Hall voltage transducer is taken over the negative input end of zero comparator U3 through the 24 resistance R 24.
The positive input terminal ground connection of described zero-crossing comparator U3; The 9th capacitor C 9 is connected between the positive input terminal and negative input end of described zero-crossing comparator U3.
One end of output termination the 25 resistance R 25 of described zero-crossing comparator U3, an end of another termination the 26 resistance R 26 of described the 25 resistance R 25, the anode of the 6th diode D6, the negative electrode of the 7th voltage stabilizing didoe D7.
Another termination+5V working power of described the 26 resistance R 26; The anode of described the 7th voltage stabilizing didoe D7 connects an end of the 27 resistance R 27.
The negative electrode of described the 6th diode D6 of another termination of described the 27 resistance R 27, an input of the described controller 28 of its public termination.
Described synchronous square wave translation circuit 30 receives the line voltage that described sampling modulate circuit 31 detects any two-phase output of the main generator unit stator winding that obtains, described line voltage is through behind the electric resistance partial pressure, import described the 4th Hall voltage transducer and carry out conversion of signals, signal input zero-crossing comparator U3 after the conversion, behind such sine wave signal process zero-crossing comparator U3 and the voltage limiter circuit subsequently, be converted into the capture-port that a square-wave signal identical with described line voltage cycle is input to controller 28, cooperate software to finish obtaining of electric machine frequency and rotating speed.
The excitation unit of the brush DC synchro wind generator that provides corresponding to the utility model embodiment, present embodiment also provide a kind of brush DC synchronous wind generating system.Described system comprises: brush DC synchro wind generator, current transformer and excitation unit.
The exciter of described brush DC synchro wind generator is connected with main generator is coaxial.Described current transformer has not control rectifying circuit of three-phase, and described three-phase is the input termination main generator unit stator winding of control rectifying circuit not, is used for the three-phase output voltage rectification to described generator, and the output VD is to described excitation unit.
Described excitation unit provides exciting current for described brush DC synchro wind generator.Described excitation unit is identical with the described excitation unit of the utility model previous embodiment, repeats no more inferior.
Among the utility model embodiment, described control section obtains the exciting voltage and the exciting current of described generator according to detection, described three-phase is the VD of control rectifying circuit output not, and the output voltage of any two-phase of main generator unit stator winding, and generator speed, adopt ring control and the control of VD outer shroud in the exciting current, export corresponding PWM ripple to described exciting power output, regulate the exciting current that described exciting power output is delivered to described generator, make the output voltage stabilization of generator, improve the stability of power system operation.
Described excitation unit of the utility model embodiment and system, directly do not follow the tracks of the output end voltage of described generator, but the VD that the three-phase voltage of being devoted to stablize described generator output or not after the control rectifying circuit rectification through described three-phase, can effectively improve the dynamic quality of system, realize inversion grid connection work for current transformer 3 reliable guarantee is provided.
More than to the excitation unit and the wind generator system of a kind of brush DC synchro wind generator provided by the utility model, be described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, part in specific embodiments and applications all can change.In sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. the excitation unit of a brush DC synchro wind generator is used for brush DC synchronous wind generating system, it is characterized in that described wind generator system comprises: brush DC synchro wind generator and current transformer that exciter is coaxial with main generator;
Described current transformer has not control rectifying circuit of three-phase, and described three-phase is the input termination main generator unit stator winding of control rectifying circuit not, is used for the three-phase output voltage rectification to described generator, and the output VD is to described excitation unit;
Described excitation unit comprises: first rectification circuit, control section and exciting power output;
Described first rectification circuit is used for after the AC-input voltage rectification, and the output DC input voitage is to described exciting power output;
Described control section, detection obtains the exciting voltage of described exciter and exciting current, described the three-phase not VD of control rectifying circuit output and the output voltage and the current rotating speed of generator of any two-phase of main generator unit stator winding, by ring control in the exciting current and the control of VD outer shroud, output PWM ripple is regulated the exciting current that described exciting power output is delivered to described generator to described exciting power output;
Described exciting power output, according to the PWM ripple that is received from described control section, the DC input voitage of described first rectification circuit output carried out inversion after, rectification is the DC excitation electric current again, exports the exciter stator winding of generator to.
2. the excitation unit of brush DC synchro wind generator according to claim 1 is characterized in that, described control section comprises: controller, speed detect circuit, sampling modulate circuit, communication interface circuit and auxiliary power circuit;
Described sampling modulate circuit is used to detect the exciting voltage that obtains exciter and exciting current, the three-phase not VD of control rectifying circuit output and the voltage of any two-phase output of main generator unit stator winding, exports described controller to;
Described speed detect circuit is used to detect the current rotating speed that obtains generator, exports described controller to;
Described controller, be used for according to the exciting voltage of the described exciter that receives and exciting current, described the three-phase not VD of control rectifying circuit output and the voltage and the current rotating speed of generator of any two-phase output of main generator unit stator winding, by ring control in the exciting current and the control of VD outer shroud, obtain exporting the duty ratio that needs, and the PWM ripple of generation and described duty ratio corresponding pulses width, export described exciting power output to;
Described communication interface circuit is used to realize that described excitation unit is connected with the communication of current transformer;
Described auxiliary power circuit is used to described controller, described pulse control circuit, described communication interface circuit, described sampling modulate circuit that working power is provided.
3. the excitation unit of brush DC synchro wind generator according to claim 2, it is characterized in that described controller comprises: first subtracter, first pi regulator, adjustment factor computing unit, second subtracter, second pi regulator, PWM generator;
The positive input terminal of described first subtracter receives given reference voltage, and negative input end receives described three-phase, and control rectifying circuit is not through the VD of sampling modulate circuit output, and output is exported first comparative result to described first pi regulator;
Described first pi regulator is exported first result of calculation to described adjustment factor computing unit after described first comparative result is carried out increment type PI calculating;
Described adjustment factor computing unit, the current rotating speed of the described generator that obtains according to detection, set the adjustment factor of described VD under the described current rotating speed, and with the product of described first result of calculation and described adjustment factor, as the exciting current set-point, export the positive input terminal of described second subtracter to;
The positive input terminal of described second subtracter receives described exciting current set-point, and negative input end receives the exciting current that described sampling conditioning voltage detecting obtains, and output is exported second comparative result to described second pi regulator;
After described second pi regulator carried out increment type PI calculating to described second comparative result, the dutyfactor value that output needs was to described PWM generator;
Described PWM generator produces the PWM ripple of corresponding pulses width according to described dutyfactor value, and exports described exciting power output to.
4. the excitation unit of brush DC synchro wind generator according to claim 3 is characterized in that, described controller is motor control chip dsPIC30F4011.
5. the excitation unit of brush DC synchro wind generator according to claim 2 is characterized in that, described communication interface circuit comprises: CAN interface circuit and serial interface circuit;
Described controller links to each other with described current transformer by the CAN interface circuit;
Described controller links to each other with host computer by the serial interface circuit.
6. the excitation unit of brush DC synchro wind generator according to claim 2 is characterized in that, described auxiliary power circuit is the single-end flyback switching power supply that high frequency transformer and chip for driving UC3844 form.
7. the excitation unit of brush DC synchro wind generator according to claim 1 is characterized in that, described exciting power output comprises: pulse control circuit, high-frequency pulse transformer, second rectification circuit;
Described pulse control circuit is used for according to the PWM ripple that is received from described control section, the DC input voitage of described first rectification circuit output is carried out inversion, and export the alternating voltage that inversion obtains to described high-frequency pulse transformer;
Described high-frequency pulse transformer is used for exporting described second rectification circuit to after the described alternating voltage step-down;
Described second rectification circuit, being used for the ac voltage rectifier after the described step-down is the DC excitation electric current, exports described exciter stator winding to.
8. the excitation unit of brush DC synchro wind generator according to claim 7 is characterized in that, described exciting power output also comprises: filtering and freewheeling circuit;
Described filtering and freewheeling circuit are connected on the output of described second rectification circuit, after being used for DC excitation electric current to the output of described second rectification circuit and carrying out filtering, export described exciter stator winding again to.
9. the excitation unit of brush DC synchro wind generator according to claim 8 is characterized in that, described excitation unit also comprises: the EMI filter circuit;
Described EMI filter circuit is used for described AC-input voltage is carried out filtering, delivers to described first rectification circuit again and carries out rectification.
10. brush DC synchronous wind generating system is characterized in that described system comprises: exciter and the coaxial brush DC synchro wind generator that is connected of main generator, current transformer and as each described excitation unit of claim 1 to 9;
Described excitation unit provides exciting current for described brush DC synchro wind generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201198204U CN202004714U (en) | 2011-04-21 | 2011-04-21 | Wind-driven power generating system and excitation unit of direct-current brushless synchronous wind-driven power generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201198204U CN202004714U (en) | 2011-04-21 | 2011-04-21 | Wind-driven power generating system and excitation unit of direct-current brushless synchronous wind-driven power generator |
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| CN202004714U true CN202004714U (en) | 2011-10-05 |
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| CN102130644A (en) * | 2011-04-21 | 2011-07-20 | 阳光电源股份有限公司 | Exciting method, device and system of direct-current brushless synchronous wind driven generator |
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| CN110661437B (en) * | 2019-10-12 | 2020-12-15 | 林敦 | Excitation rectification complete device in modular mode and production method |
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| WO2023279747A1 (en) * | 2021-07-06 | 2023-01-12 | 中山大洋电机股份有限公司 | Electric motor controller and electric motor using same |
| CN115694274A (en) * | 2022-03-21 | 2023-02-03 | 中建八局第二建设有限公司 | Method for improving excitation mode of data center generator set |
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