CN111219297A - Multi-module constant frequency variable generator - Google Patents
Multi-module constant frequency variable generator Download PDFInfo
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- CN111219297A CN111219297A CN202010117441.5A CN202010117441A CN111219297A CN 111219297 A CN111219297 A CN 111219297A CN 202010117441 A CN202010117441 A CN 202010117441A CN 111219297 A CN111219297 A CN 111219297A
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- 238000010248 power generation Methods 0.000 claims abstract description 74
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000005347 demagnetization Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/60—Cooling or heating of wind motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Eletrric Generators (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to the field of wind power generation devices, in particular to a multi-module constant frequency variable generator capable of normally generating power under a breeze condition. Meanwhile, the blades are additionally arranged in the motor, and the coil disc of the power generation module is provided with the transverse holes and the longitudinal holes which are arranged in a honeycomb manner, so that the heat dissipation effect of the power generator in the operation process is better, the phenomena of demagnetization of the magnet and reduction of the power generation efficiency caused by high temperature in the motor are avoided, and the stability, the reliability and the power generation efficiency of the motor are ensured. The motor greatly prolongs the service life of the wind driven generator, greatly reduces the times of module replacement and maintenance, and greatly reduces the operation cost.
Description
Technical Field
The invention relates to the field of power generation devices for generating power by using external kinetic energy, in particular to a multi-module constant-frequency variable generator which can realize effective power generation under the conditions of breeze to strong wind.
Background
With the development of industrial and agricultural production and the improvement of the living standard of people, the technology of generating electricity by using renewable energy sources, particularly wind energy, is receiving more and more attention at present. The present commonly used wind power generator is a constant value generator, usually, a rated working torque and a rated working speed are input to the generator, the generator outputs a rated working voltage, a rated frequency and a rated power, usually, the generator can normally generate power only under a strong wind condition, but is in a stop state under a weak wind and a weak wind condition, and cannot adapt to the change of external wind power, so that the obvious problem exists in the aspect of generating power by using renewable energy sources, for this reason, the chinese patent application CN109450A discloses a generator having a plurality of power generation units, the generator has a plurality of power generation modules which can be automatically superposed, and the rated power of the generator can be adjusted in real time according to the external power to adapt to the external power, however, in practice, the generator is found to be easy to generate internal high temperature in the operation process, and the high temperature causes the magnetism of a permanent magnet to be rapidly reduced in a short time, the demagnetization phenomenon is very serious, so that the running efficiency of the generator is greatly reduced after the generator runs for two hours, and the voltage and the current are linearly reduced; after the high-temperature resistant magnet is replaced, although the demagnetization phenomenon of the magnet disc is solved to a certain extent, the coil disc is still damaged by high temperature, the coil is easy to age, and the service life of the coil disc is greatly shortened. And the conventional air-conditioning cooling mode consumes a large amount of energy per se, and has high cost and frequent maintenance. Therefore, how to regulate and control the internal temperature of the motor so that the modular wind driven generator can normally operate and is really applied to wind power generation is a technical problem to be solved urgently in the industry.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a multi-module constant frequency variable generator with automatic air cooling inside and excellent cooling effect, which comprises a motor shell and a main power shaft; a plurality of power generation modules connected in series on the main power shaft in sequence; each power generation module comprises two oppositely arranged magnet discs and a coil disc positioned between the two magnet discs; the magnetic disc is respectively fixedly connected with the main power shaft and can rotate along with the main power shaft to form a rotor of the generator, and the coil disc and the motor shell are fixed to form a stator of the generator; still include the control system that is used for controlling a plurality of power generation module loading or uninstallation, its characterized in that: the center of the coil panel is hollowed to form a cavity, and a main power shaft penetrates through the cavity; one or a plurality of exhaust fans are fixed on the main power shaft at intervals, and the exhaust fans are positioned in the cavity of the coil panel; a plurality of axial vent holes and a plurality of radial vent holes are arranged in the coil panel.
The exhaust fan is fixed on the main power shaft and synchronously operates with the main power shaft so as to discharge the air in the motor shell outwards and simultaneously discharge the heat in the motor. In order to enable the magnet disc and the coil disc to be closely arranged and not to influence the rotation of a main power shaft and the work of the exhaust fan, the central design of the coil disc is a hollow cavity structure, and the exhaust fan is arranged in the cavity of the coil disc, so that the arrangement of the exhaust fan basically does not occupy the space in the axial direction, the arrangement, the installation and the matching of the magnet disc and the coil disc are not influenced, the characteristic that the coil disc is used as a stator to be fixed is fully utilized, the arrangement of the exhaust fan enables the air circulation speed in the motor to be greatly accelerated, and the heat dissipation effect is improved; because the heat of the motor mainly comes from the conduction of the coil panel, the invention arranges a plurality of axial vent holes and radial vent holes in the coil panel, so that the contact surface between the air and the inner part of the coil panel is enlarged, and the heat dissipation effect is further greatly improved. The structure that the inside air discharge fan of this kind of motor and axial ventilation hole, radial ventilation hole combine together in the coil panel has thoroughly changed the inside bad a great deal of problem that brings of heat dissipation of current aerogenerator, has greatly improved aerogenerator, especially makes this kind of multimode generator can guarantee that its operation generates electricity constant frequency, stability, can realize power variable according to outside wind-force size. Certainly, in order to avoid the resistance of the exhaust fan from consuming partial energy, the blades of the exhaust fan are not easy to be too large, and are preferably just accommodated in the cavity at the center of the coil panel.
Furthermore, the quantity of exhaust fan equals with the quantity of power generation module, every all be equipped with an exhaust fan in the cavity of coil panel. For example, if there are four power generation modules, there are four exhaust fans, so that the exhaust and heat dissipation effects are good.
Preferably, the axial ventilation holes and the radial ventilation holes are mutually crossed and communicated, so that wind generated by the exhaust fan in the motor can freely and transversely and longitudinally shuttle in the coil panel to fully dissipate heat generated by the coil panel.
For the superposition and the uninstallation of accurate effectual control each module, the outside wind-force size of adaptation, control system includes that the controller is such as PLC, signal acquisition transmission module and controller signal connection, and the controller is according to the signal that receives from signal acquisition transmission module respectively control switching on of each coil panel output circuit, and the controller is through the quantity of the coil panel of control output circuit switching on in order to control the quantity of the power generation module who participates in the electricity generation. Through signal acquisition and analysis and automatic control of the superposition and the uninstallation of the power generation modules through the controller, more modules are superposed to generate power under the condition of strong wind, and the corresponding power generation modules are uninstalled under the condition of weak wind, so that the rated power of the generator is always matched with the obtained external wind energy, the generator can generate power at any wind power section, the shutdown caused by small wind power is avoided, and the wind energy waste caused by large wind power is avoided.
In order to enhance the magnetic field intensity and the magnetic flux, permanent magnets are arranged on each magnet disk in a staggered mode according to the N pole and the S pole, and the magnetic poles of the magnets on the two oppositely arranged magnet disks are opposite.
In order to make the structure of the motor more compact, two adjacent power generation modules share one magnet disc, and the magnet disc is simultaneously used as a left magnet disc of one power generation module and a right magnet disc of another adjacent power generation module.
As various options, the signal acquisition and transmission module is a speed measurement encoder, a power sensor, a voltage sensor, a current sensor or a torque sensor. If the speed measuring encoder is selected, the speed measuring encoder is connected with the main power shaft to detect the rotating speed of the main power shaft and output signals.
In order to stabilize the output voltage and current of the generator and meet the power supply requirement, the generator further comprises a rectifier and an inverter which are in one-to-one correspondence with each coil panel, the coil panels are electrically connected with the input ends of the rectifiers, and the output ends of the rectifiers are electrically connected with the input ends of the inverters.
The beneficial technical effects of the invention are as follows: an exhaust fan is ingeniously arranged on a main power shaft of the wind driven generator and in a cavity in the center of a coil disc, and criss-cross vent holes similar to honeycomb are formed in the coil disc, so that natural air cooling can be quickly realized on the coil disc of a main heating component of the generator, the cooling inside the generator is well realized under the condition of not needing external cooling measures, and the magnet disc in the generator is ensured not to be demagnetized and demagnetized, and the power generation efficiency is not reduced; in addition, the modular wind driven generator with the modules connected in series on the same main power shaft can automatically regulate and control the number of the power generation modules participating in power generation by receiving signals from the signal acquisition module through the control system, can realize the power variation of the generator, is a variable generator, and ensures that the rated power of the generator can be always matched with the power input from the outside, thereby realizing the normal power generation of all wind power sections from breeze to strong wind, and greatly improving the power generation duration and the power generation amount.
Drawings
FIG. 1 is an exploded perspective view of an embodiment of a generator of the present invention;
FIG. 2 is a schematic diagram of a structure of the present invention in which a central cavity of a coil plate of a generator accommodates an exhaust fan;
FIG. 3 is a schematic view of axial vents and radial vents arranged inside a coil panel of a generator according to the present invention;
FIG. 4 is an exploded perspective view of an embodiment of the generator of the present invention;
FIG. 5 is a logic relationship diagram of operation control according to the embodiment of the present invention (the signal acquisition and transmission module employs a speed measurement encoder);
FIG. 6 is a logic diagram of operation control according to an embodiment of the present invention (the signal acquisition and transmission module employs a current, voltage or power sensor);
FIG. 7 is a logic diagram of the operation control method according to the embodiment of the present invention (the signal acquisition and transmission module employs a torque sensor);
FIG. 8 is a logic diagram of the operation control method according to the embodiment of the present invention (the signal acquisition and transmission module employs a power sensor);
FIG. 9 is a schematic view of the structure of the exhaust fan portion of the generator according to the present invention.
Reference numerals in the drawings of the specification include: the device comprises a motor shell 1, a main power shaft 2, a power generation module 3, a magnet disc 31, a coil disc 32, screws 33, radiating fins 11, a controller 4, a signal acquisition and transmission module 5, an exhaust fan 6, an axial vent hole 7 and a radial vent hole 8.
Detailed Description
The following is further detailed by way of specific embodiments:
referring to fig. 1-3, a preferred embodiment of a constant frequency variable generator with a plurality of power generation modules includes: motor housing 1, main power shaft 2, four electricity generation module 3 and the control system of concatenating in proper order on main power shaft 2, motor housing 1 includes upper casing, lower casing and front end housing, the rear end cap fixed mutually through the bolt, and main power shaft 2, electricity generation module 3 are all installed in motor housing 1, still are provided with the radiating fin 11 of being convenient for heat dissipation on motor housing 1. Each power generation module 3 comprises a coil disc 32 and a group of left and right magnet discs which are arranged oppositely, a plurality of left magnets are arranged on the left magnet disc in a staggered mode according to N poles and S poles, a plurality of right magnets are arranged on the right magnet disc in a staggered mode according to S poles and N poles, magnetic poles of the left magnets and the right magnets which are arranged oppositely are opposite, gaps are reserved between the left magnets and the right magnets, gaps are correspondingly reserved between the left magnet disc and the right magnet disc, and the left magnet disc and the right magnet disc are fixedly connected with the main power shaft 2 through key grooves respectively and can rotate along with the main power shaft 2 to form a rotor of the power generator. Coil panel 32 passes through screw 33 to be fixed on motor housing 1, and coil panel 32 constitutes the stator of generator, and coil panel 32 is inside to be arranged in order by a plurality of little coil packages and constitutes, wholly constitute with the coil panel that left side magnet dish, right magnet dish shape match, little coil package are formed by enameled copper wire coiling, and the quantity of little coil package can be according to the power decision of demand and generator.
The end surfaces of the left magnet disc and the right magnet disc are substantially parallel to the end surface of the coil disc 32 and are substantially vertical to the axis of the main power shaft 2; the periphery wall of left side magnet dish, right magnet dish with certain space has between motor housing 1's the inner wall to make the magnet dish can not rub motor housing 1 when rotating. The coil disk 32 may cut the magnetic lines of force between the left and right magnets when the unit magnet portions 31 rotate with the main power shaft 2.
In this embodiment, two adjacent power generation modules share one magnet disc, the magnet disc is also used as a left magnet disc of one power generation module and a right magnet disc of another adjacent power generation module, and a plurality of left magnets and right magnets are respectively arranged on two surfaces of the magnet disc. This optimization makes the structure of the generator more compact and saves one magnet disc between two adjacent unit magnet portions 31, thereby saving cost.
As shown in fig. 9, the center of the coil panel 32 is hollowed to form a cavity, the main power shaft 2 penetrates through the cavity, four exhaust fans 6 are fixed on the main power shaft 2, the four exhaust fans are respectively located in the cavity of each coil panel 32, a plurality of axial vent holes 7 and a plurality of radial vent holes 8 are arranged in the coil panel 32, and the axial vent holes 7 and the radial vent holes 8 are mutually crossed and conducted. The arrangement of the four exhaust fans 6 greatly accelerates the air circulation speed in the motor, thereby improving the heat dissipation effect; because the heat of the motor mainly comes from the electric conduction of the coil disc 32, a plurality of axial vent holes 7 and radial vent holes 8 are arranged in the coil disc 32, so that the contact surface of air and the inside of the coil disc 32 is increased, and the heat dissipation effect is further greatly improved.
Each power generation module 3 has its own rated power, in this embodiment, the rated powers of the power generation modules 3 are the same, and the total rated power of the generator is the sum of the rated powers of the power generation modules 3. The plurality of power generation modules 3 are sequentially connected in series on the main power shaft 2 so that each power generation module 3 can receive the external power transmitted by the main power shaft 2 at the same time.
The control system comprises a controller and signal acquisition and transmission modules, the signal acquisition and transmission modules are in signal connection with the controller, the controller respectively controls the conduction of the output circuits of the coil panels 32 according to the received signals from the signal acquisition and transmission modules, and the controller controls the number of the power generation modules 3 participating in power generation by controlling the number of the coil panels 32 conducted by the output circuits. Specifically, the controller 4 can select a plurality of devices, and can be a single chip microcomputer or a PLC controller, and the selected PLC is siemens PLC in this embodiment. The signal collecting and transmitting module 5 includes a speed measuring encoder in this embodiment, for example, a hall sensor may be selected to detect the rotating speed of the main power shaft 2, the speed measuring encoder is connected to the main power shaft 2 to detect the rotating speed and output a signal, and the signal is a rotating speed signal. The change of the magnitude of the input external power is firstly reflected on the rotating speed of the main power shaft 2 of the generator, if the external power is large, the rotating speed is high, and if the external power is small, the rotating speed is low, and the control is realized by detecting the rotating speed of the main power shaft 2, which is a preferable mode. When the rotating speed of the main power shaft 2 reaches a preset rotating speed upper limit value, the controller 4 controls to conduct an output circuit of a coil disc 32 so as to load a power generation module 3 to participate in power generation, and at the moment, a reverse torque opposite to the external power is loaded on the main power shaft 2, so that the rotating speed of the main power shaft is reduced to be within the original rotating speed range; when the rotating speed of the main power shaft 2 reaches a preset lower rotating speed limit value, the controller 4 controls to disconnect an output circuit of the coil disc 32 so as to unload a power generation module 3 which participates in power generation, and at the moment, a reverse torque opposite to the external power is unloaded from the main power shaft 2, so that the rotating speed of the main power shaft rises to the original rotating speed range. Thus, when the external power is increased, the controller 4 controls the output circuits of the coil panels 32 which are conducted in a larger number so that more power generation modules 3 participate in power generation, and when the external power is smaller, the controller 4 controls the output circuits of the coil panels 32 which are conducted in a smaller number so that fewer power generation modules 3 participate in power generation.
The controller of the invention has the function of controlling and conducting the output circuits of the coil panels 32 with different numbers according to the received signals of the external power input size so as to control the power generation modules 3 with different numbers to generate current for power generation, so that the rated power of the generator is adjusted in real time to adapt to the size and the change of the input external power and power.
In order to better control the output circuit of the coil panel 32, the control system further comprises a plurality of on-off switch modules, the on-off switch modules are arranged between the rectifier and the inverter, and the on-off switch modules are electromagnetic switches; the controller 4 is respectively connected with the on-off switch modules, and the output circuit of each coil panel 32 is connected with one on-off switch module in series; the controller 4 can control the conduction of the on-off switch module according to the received signal from the signal acquisition and transmission module 5 so as to control the conduction of the output circuit of the coil panel 32.
In the embodiment of the operation control method of the generator with multiple power generation modules, as shown in a logical relationship diagram in fig. 5, how to control four power generation modules (respectively numbered as A, B, C, D) to participate in power generation is given, in the embodiment, a speed measurement encoder is used as a signal acquisition and transmission module to sense and transmit the rotation speed information of a main power shaft, and the operation control method of the embodiment includes the following steps:
A. a rotating speed upper limit value and a rotating speed lower limit value are preset in the controller 4;
B. the external power drives the main power shaft 2 of the generator to rotate and drives the unit magnet parts 31 of the power generation modules 3 to rotate, and the speed measuring encoder detects and collects the rotating speed information of the main power shaft 2 and transmits a rotating speed signal to the controller 4;
C. when the rotating speed of the main power shaft 2 reaches the upper limit value of the rotating speed, the controller 4 controls and conducts an output circuit of the coil disc 32, the coil disc 32 is conducted with an external load to form a loop, electric potential generated by the coil disc 32 forms current in the loop, so that a power generation module 3 is loaded to participate in power generation, and the rotating speed of the main power shaft 2 is reduced to be between the upper limit value of the rotating speed and the lower limit value of the rotating speed;
D. the external power is increased to drive the rotation speed of the main power shaft 2 to increase, when the rotation speed reaches the upper limit value of the rotation speed again, the controller 4 controls and conducts an output circuit of the coil disc 32, the coil disc 32 is conducted with an external load to form a loop, the electric potential generated by the coil disc 32 forms current in the loop, so that the power generation module 3 is loaded to participate in power generation, and at the moment, the rotation speed of the main power shaft 2 is reduced to be between the upper limit value of the rotation speed and the lower limit value of the rotation speed.
By analogy, under the condition that the external power is continuously increased, the N power generation modules 3 can be loaded step by step and participate in power generation simultaneously so as to match the power input from the outside and the power increase, so that the generator can normally generate power and output current meeting the standard within a constant rotating speed range all the time. When the external power is reduced, the generator can also unload the power generation module 3 already participating in the power generation, and comprises the following steps:
E. when the external power is gradually reduced and the rotating speed of the main power shaft 2 reaches the lower limit value of the rotating speed, the controller 4 controls to disconnect an output circuit of the coil disc 32, the coil disc 32 is disconnected with a loop of an external load, the coil disc 32 only generates electric potential but cannot form current, so that a power generation module 3 which participates in power generation is unloaded, and the rotating speed of the main power shaft 2 rises to a position between the upper limit value of the rotating speed and the lower limit value of the rotating speed;
F. when the external power continues to be gradually reduced and the rotating speed of the main power shaft 2 reaches the lower limit value of the rotating speed again, the controller 4 further controls to open the output circuit of one coil disc 32, the coil disc 32 is disconnected from the loop of the external load, the coil disc 32 only generates the electric potential and cannot form the current, and therefore one power generation module 3 which participates in power generation is unloaded again.
Specifically, the speed measuring encoder is an encoder with the model number of Bourns EMS22D51-B28-LS5, is installed on the main power shaft 2, and detects the rotating speed of the main power shaft 2.
The above embodiments are merely examples of the present invention, and common general knowledge in the technical fields of known specific structures and characteristics is not described herein too much, so that a person of ordinary skill in the art can understand all the common technical knowledge in the technical fields of the invention before the application date or the priority date, and it should be noted that a person of ordinary skill in the art can make several changes and modifications without departing from the structure of the present invention, and these should be considered as the protection scope of the present invention, and the protection scope of the present invention should be determined by the content of the claims, and the description of the specific embodiments in the specification and the like can be used to explain the content of the claims.
Claims (8)
1. The multi-module constant frequency variable generator comprises a motor shell and a main power shaft; a plurality of power generation modules connected in series on the main power shaft in sequence; each power generation module comprises two oppositely arranged magnet discs and a coil disc positioned between the two magnet discs; the magnetic disc is respectively fixedly connected with the main power shaft and can rotate along with the main power shaft to form a rotor of the generator, and the coil disc and the motor shell are fixed to form a stator of the generator; still include the control system that is used for controlling a plurality of power generation module loading or uninstallation, its characterized in that:
the center of the coil panel is hollowed to form a cavity, and a main power shaft penetrates through the cavity; one or a plurality of exhaust fans are fixed on the main power shaft at intervals, and the exhaust fans are positioned in the cavity of the coil panel; a plurality of axial vent holes and a plurality of radial vent holes are arranged in the coil panel.
2. The multi-module constant frequency variable generator of claim 1, wherein: the quantity of exhaust fan equals with the quantity of power generation module, every all be equipped with an exhaust fan in the cavity of coil panel.
3. The multi-module constant frequency variable generator of claim 1, wherein: the axial vent holes and the radial vent holes are mutually crossed and communicated.
4. The multi-module constant frequency variable generator of claim 1, wherein: the control system comprises a controller and signal acquisition and transmission modules, the signal acquisition and transmission modules are in signal connection with the controller, the controller respectively controls the conduction of the output circuits of the coil panels according to the received signals from the signal acquisition and transmission modules, and the controller controls the number of the power generation modules participating in power generation by controlling the number of the coil panels conducted by the output circuits.
5. The multi-module constant frequency variable generator of claims 1 to 4, wherein: each magnet disc is provided with permanent magnets according to the staggered arrangement of N poles and S poles, and the magnetic poles of the magnets on the two oppositely arranged magnet discs are opposite.
6. The multi-module constant frequency variable generator of claim 1, wherein: two adjacent power generation modules share one magnet disc, and the magnet disc is simultaneously used as a left magnet disc of one power generation module and a right magnet disc of the other adjacent power generation module.
7. The multi-module constant frequency variable generator of claim 4, wherein: the signal acquisition and transmission module is a speed measurement encoder, or a power sensor, or a voltage sensor, or a current sensor, or a torque sensor.
8. The multi-module constant frequency variable generator of claim 1, wherein: the coil panel is electrically connected with the input end of the rectifier, and the output end of the rectifier is electrically connected with the input end of the inverter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010117441.5A CN111219297A (en) | 2020-02-25 | 2020-02-25 | Multi-module constant frequency variable generator |
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| CN202010117441.5A CN111219297A (en) | 2020-02-25 | 2020-02-25 | Multi-module constant frequency variable generator |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08214500A (en) * | 1994-09-13 | 1996-08-20 | Toyo Electric Mfg Co Ltd | Main motor for electric train |
| JP2000116060A (en) * | 1998-09-29 | 2000-04-21 | Nishishiba Electric Co Ltd | Rotating electric machine |
| CN109450312A (en) * | 2018-07-27 | 2019-03-08 | 浙江瑞枫新能源科技有限公司 | Generator with multiple generator units |
| CN211715259U (en) * | 2020-02-25 | 2020-10-20 | 宁波晓风风电技术有限公司 | Multi-module constant frequency variable generator |
-
2020
- 2020-02-25 CN CN202010117441.5A patent/CN111219297A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08214500A (en) * | 1994-09-13 | 1996-08-20 | Toyo Electric Mfg Co Ltd | Main motor for electric train |
| JP2000116060A (en) * | 1998-09-29 | 2000-04-21 | Nishishiba Electric Co Ltd | Rotating electric machine |
| CN109450312A (en) * | 2018-07-27 | 2019-03-08 | 浙江瑞枫新能源科技有限公司 | Generator with multiple generator units |
| CN211715259U (en) * | 2020-02-25 | 2020-10-20 | 宁波晓风风电技术有限公司 | Multi-module constant frequency variable generator |
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