CN218293747U - Wind driven generator with automatic brake device - Google Patents
Wind driven generator with automatic brake device Download PDFInfo
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- CN218293747U CN218293747U CN202221632562.4U CN202221632562U CN218293747U CN 218293747 U CN218293747 U CN 218293747U CN 202221632562 U CN202221632562 U CN 202221632562U CN 218293747 U CN218293747 U CN 218293747U
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- photoelectric coupler
- automatic brake
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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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Abstract
The utility model relates to a aerogenerator with automatic brake equipment, including consecutive three-phase alternator, the controller mainboard, the battery, a load, automatic brake equipment includes that electric frequency acquires the module, switch module, brake assembly, and electric frequency acquires the input of module and is connected with two arbitrary connections in three alternating current lines of three-phase alternator and is used for acquiring the electric frequency, and electric frequency acquires the output of module and is connected with switch module and is used for control switch module's break-make electricity, and switch module and brake assembly are connected and are used for controlling brake assembly's break-make electricity. The utility model provides a pair of aerogenerator with automatic brake device judges through the value of measuring electrical frequency whether to start the brake protection, and wherein automatic brake device does not rely on the control of controller mainboard, can carry out the brake protection to aerogenerator alone, can be under the environment such as strong wind weather, typhoon weather automatic execution slow speed or shutdown protection, unmanned on duty.
Description
Technical Field
The utility model relates to a wind power generation equipment technical field, in particular to aerogenerator with automatic brake device.
Background
The wind driven generator is one kind of clean energy equipment without pollution and capable of producing electric power with wind energy, and is one wind driven generator with blades to rotate to drive the electromagnetic induction generator to produce electric power. The traditional wind driven generator is generally required to have the starting wind speed not lower than 3 grades of wind, and the rated running wind speed is generally required to be 5-6 grades of wind or more, so that certain requirements are provided for the use environment of the wind driven generator, the range of the application area of the wind driven generator is quite limited, the traditional wind driven generator is generally large-scale equipment, the wind driven generator is only suitable for the area with strong wind all the year around, and the large-scale wind driven generator is not used in the wide area with small wind or breeze or the rural household households. Under the blowing of small wind or breeze, the blades of the wind driven generator can not rotate to generate electric power, so that the large wind driven generator can not provide substantial electric power support for vast rural areas with small wind power.
Wind in nature changes all the time and is always in an unstable state, and the rotating speed of the fan blades generally changes along with the size of wind power, so that the rotating speed of the generator also changes continuously, the voltage generated by the generator is suddenly high and suddenly low, and the current is also extremely unstable.
The wind power generator does not operate under any wind power, the wind power generator has a limitation of a rated rotating speed (rotating speed range), and if the wind speed is too high, the generating efficiency of the generator is low. If the wind speed is further increased, the wind speed may exceed the limit rotational speed of the wind turbine, causing a failure such as runaway, and the wind turbine may be damaged. Therefore, a brake assembly is arranged on the modern wind driven generator to control the wind driven generator to operate within a certain rotating speed range.
However, the brake assembly of the existing wind turbine needs to be controlled by the controller motherboard of the wind turbine itself, and if a mature controller motherboard is already marketed, seamless electrical connection and system program control are not provided for electrical or mechanical structures of one or more different wind turbines.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an aerogenerator with automatic brake device judges through the value of measuring the electrical frequency whether to start the brake protection, and wherein automatic brake device does not rely on the control of controller mainboard, can carry out alone and carry out the brake protection to aerogenerator.
For realizing the purpose of the utility model, the following technical proposal is adopted:
the utility model provides a aerogenerator with automatic brake device, includes consecutive three-phase alternator, controller mainboard, battery, load, still includes automatic brake device, automatic brake device includes that electric frequency acquires module, switch module, brake subassembly, electric frequency acquires the input of module and is connected with arbitrary two in three alternating current lines of three-phase alternator and is used for acquireing electric frequency, electric frequency acquires the output of module and is connected the break-make electricity that is used for control switch module with switch module, switch module and brake subassembly are connected the break-make electricity that is used for controlling brake subassembly.
The further improvement is that the electrical frequency acquisition module comprises a zero-crossing detection module and a frequency detection module, wherein the input end of the zero-crossing detection module is connected with any two of three alternating current lines of the three-phase alternating current generator, the pulse signal output end of the zero-crossing detection module is connected with the frequency detection module, and the control signal output end of the frequency detection module is connected with the switch module.
The further improvement is that the frequency detection module adopts a singlechip with a capture function.
In a further development, the switching module is a relay.
The system is further improved in that the zero-crossing detection module comprises a filter capacitor, a first current-limiting resistor, a second current-limiting resistor, a third current-limiting resistor, a sampling resistor, a pull-up resistor, a first photoelectric coupler, a second photoelectric coupler, a first diode and a second diode, two ends of the filter capacitor are used for being connected with two alternating current lines of a three-phase alternating-current generator and connected with the sampling resistor in parallel, a first pin of the first photoelectric coupler is connected with the first current-limiting resistor and the first diode, a second pin of the first photoelectric coupler is connected with the second current-limiting resistor, a first pin of the second photoelectric coupler is connected with the second current-limiting resistor and the second diode, a second pin of the second photoelectric coupler is connected with the first current-limiting resistor, a fourth pin of the first photoelectric coupler and a fourth pin of the second photoelectric coupler are connected with a 5V power supply in parallel after being connected in parallel, third pins of the first photoelectric coupler and the second photoelectric coupler are connected with the ground in parallel, one end of the fourth pin of the first photoelectric coupler and the fourth pin of the second photoelectric coupler are connected with one end of the third current-limiting resistor in parallel, and the other end of the third current-limiting resistor is connected with a pulse detection module as a pulse frequency detection signal.
In a further development, the zero-crossing detection module and the frequency detection module are supplied with power from a battery.
The further improvement is that a rectification circuit is connected between the three-phase alternating-current generator and the controller mainboard.
The further improvement is that the controller mainboard comprises a power control module, a wind speed monitoring module and a charge-discharge control module.
The further improvement lies in that the brake component is any one of cylinder brake, mechanical push rod brake, mechanical disc brake and electromagnetic eddy current brake.
In a further improvement, the load is an LED street lamp.
The utility model has the advantages that:
the utility model provides a pair of aerogenerator with automatic brake device judges through the value of measuring the electrical frequency whether to start the brake protection, and wherein automatic brake device does not rely on the control of controller mainboard, can carry out the brake protection to aerogenerator alone, can be under the environment such as strong wind weather, typhoon weather automatic execution slow speed or shutdown protection, unmanned on duty, automatic brake device can be applicable to most of small-size aerogenerator on the market.
Drawings
Fig. 1 is a schematic view of the overall circuit structure of a wind turbine with an automatic braking device according to the present invention;
fig. 2 is a specific circuit diagram of the zero-crossing detection module in the wind turbine with the automatic braking device of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term used in the present specification may be used to describe various components, but the components are not limited to these terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through an intermediary, so to speak, communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art. The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
Please refer to fig. 1, fig. 2, the embodiment of the present invention provides a wind power generator with an automatic braking device, as shown in fig. 1, the wind power generator includes a three-phase ac generator, a controller mainboard, a storage battery, and a load, which are connected in sequence, and further includes an automatic braking device, the automatic braking device includes an electrical frequency acquisition module, a switch module, and a brake assembly, the input of the electrical frequency acquisition module is connected with any two of three ac lines of the three-phase ac generator for acquiring the electrical frequency, the output of the electrical frequency acquisition module is connected with the switch module for controlling the power-on and power-off of the switch module, the switch module is connected with the brake assembly for controlling the power-on and power-off of the brake assembly.
The utility model discloses a theory of operation: when the electric frequency acquisition module monitors that the electric frequency is greater than the preset electric frequency, the electric frequency acquisition module outputs a control signal to enable the switch module to be switched on, and at the moment, the brake assembly is switched on to normally work to execute a braking action. When the electric frequency acquisition module monitors that the electric frequency is smaller than the preset electric frequency, the switch module is disconnected and is not electrified, and at the moment, the brake assembly is not electrified and does not execute the braking action.
It should be noted that, since the wind turbine is generally a three-phase ac generator, the rotation speed of the rotor and the power generation frequency are in a proportional relationship, the voltage waveforms between any two phase lines of the three-phase ac generator have the same amplitude and frequency, the phase difference is 120 degrees, and the rotation speed (rpm) and the frequency of the three-phase ac generator are in a one-to-one relationship, which is: n = F60/P, wherein: n is the rotation speed (rpm), F is the alternating current frequency (HZ), and P is the number of pole pairs of the generator. Therefore, the rotating speed of the wind driven generator can be calculated only by knowing the number of pole pairs of the wind driven generator and the frequency of any two phase lines of the generated three-phase alternating current. That is, as the electrical frequency is higher, the generator rotational speed at that time is represented as higher. Therefore, whether to execute the braking action can be judged directly by judging the magnitude of the electrical frequency.
In addition, because of the unstable wind speed of a general small wind driven generator, under the condition of connecting a battery or a street lamp load, the amplitude of an output alternating current voltage of the general small wind driven generator is mostly controlled within the range of 18V-30V, so that the 24V battery can be charged. When the circuit is disconnected and is not connected with a load or a battery, the amplitude of the output alternating voltage of the automatic brake device can be changed between 0V and 200V, but when the rotating speed of the brake is reached, the amplitude of the output open-circuit voltage of the automatic brake device is generally higher, so that the designed power voltage range of the automatic brake device can select a high-voltage mode, and as long as a stable electrical frequency signal can be measured in a high-voltage stage, the stable electrical frequency signal is sent to a frequency detection module to judge whether to start the brake.
The electrical frequency acquisition module comprises a zero-crossing detection module and a frequency detection module, wherein the input end of the zero-crossing detection module is connected with any two of three alternating current lines of the three-phase alternating current generator, the pulse signal output end of the zero-crossing detection module is connected with the frequency detection module, and the control signal output end of the frequency detection module is connected with the switch module.
In this embodiment, the frequency detection module is a single chip with a capture function, and the switch module is a relay.
As shown in fig. 2, the zero-cross detection module includes a filter capacitor C1, a first current-limiting resistor R1, a second current-limiting resistor R2, a third current-limiting resistor R4, a sampling resistor R5, a pull-up resistor R3, a first photoelectric coupler U1, a second photoelectric coupler U2, a first diode D1, and a second diode D2, two ends of the filter capacitor C1 are used for being connected to two ac lines of a three-phase ac generator and connected in parallel with the sampling resistor R5, a first pin of the first photoelectric coupler U1 is connected to the first current-limiting resistor R1 and the first diode D1, a second pin of the first photoelectric coupler U1 is connected to the second current-limiting resistor R2, a first pin of the second photoelectric coupler U2 is connected to the second current-limiting resistor R2 and the second diode D2, a second pin of the second photoelectric coupler U2 is connected to the first current-limiting resistor R1, fourth pins of the first photoelectric coupler U1 and the second photoelectric coupler U2 are connected in parallel to the second current-limiting resistor R2, a first current-limiting resistor R1 and a second current-limiting resistor R3 are connected to a third current-limiting resistor R3, and a third current-limiting resistor R2, and a third current-frequency signal input terminal of the photoelectric coupler U2 are connected in parallel.
Specifically, the first photoelectric coupler U1 and the second photoelectric coupler U2 adopt linear optocouplers, the first diode D1 and the second diode D2 are light emitting diodes, and specifically, the model of the linear optocouplers is PC817. Of course, those skilled in the art may select other types of linear optocouplers according to actual needs.
In the embodiment, two photoelectric couplers connected in parallel are adopted to simultaneously detect the positive half wave and the negative half wave of the alternating current, two zero crossing points can be detected by averaging one half wave, and the average two-time pulse corresponds to one electric wave period, so that the real electric frequency is obtained by dividing the obtained pulse frequency by 2.
When the anode end of the light emitting diode of the first photoelectric coupler U1 generates a positive half-cycle waveform (assuming a positive half-wave of the alternating current AC), the light emitting diode is electrically conducted, a positive pulse with an amplitude VCC is generated at the emitter end of the phototriode of the first photoelectric coupler U1, the positive pulse is transmitted to an I/O port of a single chip microcomputer (having a capturing function), and the single chip microcomputer captures a rising edge signal of the positive pulse.
When the anode of the light emitting diode of the second photoelectric coupler U2 generates a positive half-cycle waveform (assuming a negative half-wave of the AC), the light emitting diode is electrically conducted, a positive pulse with an amplitude VCC is generated at the emitter terminal of the phototriode of the second photoelectric coupler U2, the positive pulse is transmitted to the I/O port of the single chip microcomputer (having a capturing function), and the single chip microcomputer captures a rising edge signal of the positive pulse.
The positive and negative half waves of the alternating current of the wind driven generator can generate a positive pulse with the amplitude value of VCC at the emitter end of the phototriode, and the frequency detection module calculates the pulse frequency and executes the comparison and judgment of the frequency. The positive pulse with the amplitude value of VCC is input from a signal input port of the frequency detection module, when the rotating speed is detected to be larger than a certain set value (namely the frequency value is larger than a certain preset value), the frequency detection module outputs a control signal to control the relay to be closed, the driving brake assembly is switched on to execute the brake action, the rotating speed of the wind wheel of the wind driven generator is slowed down, and the purpose of stopping and protecting the wind driven generator is achieved.
For example, an upper limit frequency may be set in the frequency detection module, for example, set to 110Hz, and when the frequency detection module detects that the electrical frequency is greater than 110Hz, the frequency detection module outputs a control signal to control the relay to close, so as to turn on the brake driving assembly to perform a braking action.
Besides, in other embodiments, the current limiting resistor connected with the three-phase alternating current can be adjusted to be suitable for detecting the voltage in a high-voltage stage, so as to avoid exceeding the current and burning out the optical coupler or the resistor, for example, to ensure that the fan open-circuit voltage is within a range of 100-150 VAC and is within a safe current range.
The utility model discloses an use opto-coupler isolator to found zero passage detection module, let by survey power and singlechip place circuit physics keep apart, reduce electromagnetic interference, improve and detect the reliability.
In this embodiment, the zero-crossing detection module and the frequency detection module are powered by a storage battery.
In this embodiment, a rectification circuit is further connected between the three-phase ac generator and the controller main board.
The controller mainboard also comprises a power control module, a wind speed monitoring module and a charge-discharge control module. The power control module is used for controlling output power, the wind speed monitoring module is used for monitoring ambient wind speed, and the charging and discharging control module is used for controlling charging and discharging of the battery.
In this embodiment, the brake assembly is any one of cylinder brake, mechanical push rod brake, mechanical disc brake, electromagnetic eddy current brake. Preferably, the cylinder brake is adopted, and the specific working principle of the cylinder brake belongs to the prior art, and the technical personnel in the field can refer to the prior art.
The brake assembly is connected with the storage battery through the relay, and when the single chip microcomputer sends a control signal to the relay, the brake assembly, the relay and the storage battery are communicated, so that the brake assembly is electrified to execute a braking action.
In this embodiment, the load is an LED street lamp. Of course, other loads are possible.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express the specific implementation manner of the present invention, and the description thereof is specific and detailed, but not to be understood as the limitation of the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a aerogenerator with automatic brake device, includes consecutive three-phase alternator, controller mainboard, battery, load, its characterized in that still includes automatic brake device, automatic brake device includes that electrical frequency acquires module, switch module, brake subassembly, electrical frequency acquires the input of module and is connected with arbitrary two in three alternating current lines of three-phase alternator and is used for acquireing electrical frequency, electrical frequency acquires the output of module and is connected the break-make electricity that is used for control switch module with switch module, switch module and brake subassembly are connected the break-make electricity that is used for control brake subassembly.
2. The wind power generator with an automatic brake device according to claim 1, wherein the electrical frequency acquisition module comprises a zero-crossing detection module and a frequency detection module, wherein an input end of the zero-crossing detection module is connected with any two of three ac lines of the three-phase ac generator, a pulse signal output end of the zero-crossing detection module is connected with the frequency detection module, and a control signal output end of the frequency detection module is connected with the switch module.
3. The wind power generator with an automatic brake device as claimed in claim 2, wherein the frequency detection module employs a single chip with a capture function.
4. The wind power generator with an automatic brake device according to claim 2, wherein the switch module is a relay.
5. The wind power generator with the automatic brake device according to claim 2, wherein the zero-cross detection module comprises a filter capacitor, a first current limiting resistor, a second current limiting resistor, a third current limiting resistor, a sampling resistor, a pull-up resistor, a first photoelectric coupler, a second photoelectric coupler, a first diode and a second diode, two ends of the filter capacitor are used for being connected with two alternating current lines of the three-phase alternating current generator and connected with the sampling resistor in parallel, a first pin of the first photoelectric coupler is connected with the first current limiting resistor and the first diode, a second pin of the first photoelectric coupler is connected with the second current limiting resistor, a first pin of the second photoelectric coupler is connected with the second current limiting resistor and the second diode, a second pin of the second photoelectric coupler is connected with the first current limiting resistor, fourth pins of the first photoelectric coupler and the second photoelectric coupler are connected with a 5V power supply through the pull-up resistor after being connected in parallel, third pins of the first photoelectric coupler and the second photoelectric coupler are connected with ground, and a third pin of the first photoelectric coupler and a fourth pin of the first photoelectric coupler are connected with a pulse input end of the third current limiting resistor in parallel connection as a pulse detection signal input end of the first current limiting resistor.
6. The wind power generator with an automatic brake device according to claim 2, wherein the zero-crossing detection module and the frequency detection module are powered by a storage battery.
7. The wind power generator with an automatic brake device according to claim 1, wherein a rectification circuit is further connected between the three-phase ac generator and the controller main board.
8. The wind power generator with the automatic brake device as claimed in claim 1, wherein the controller motherboard comprises a power control module, a wind speed monitoring module and a charge-discharge control module.
9. The wind power generator with an automatic brake device according to claim 1, wherein the brake assembly is any one of a cylinder brake, a mechanical push rod brake, a mechanical disc brake and an electromagnetic eddy current brake.
10. The wind power generator with an automatic brake device according to claim 1, wherein the load is an LED street lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221632562.4U CN218293747U (en) | 2022-06-28 | 2022-06-28 | Wind driven generator with automatic brake device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221632562.4U CN218293747U (en) | 2022-06-28 | 2022-06-28 | Wind driven generator with automatic brake device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218293747U true CN218293747U (en) | 2023-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221632562.4U Active CN218293747U (en) | 2022-06-28 | 2022-06-28 | Wind driven generator with automatic brake device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218293747U (en) |
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2022
- 2022-06-28 CN CN202221632562.4U patent/CN218293747U/en active Active
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