CN201556964U - Off-grid small-sized wind power generation control inverter - Google Patents
Off-grid small-sized wind power generation control inverter Download PDFInfo
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- CN201556964U CN201556964U CN2009201011154U CN200920101115U CN201556964U CN 201556964 U CN201556964 U CN 201556964U CN 2009201011154 U CN2009201011154 U CN 2009201011154U CN 200920101115 U CN200920101115 U CN 200920101115U CN 201556964 U CN201556964 U CN 201556964U
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- inverter
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- power generation
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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
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
An off-grid small-sized wind power generation control inverter aims to overcome shortages of the existing off-grid small-sized wind power generation control inverter which utilizes a general soft start mode and is high in peak current and easy to damage power devices. The off-grid small-sized wind power generation control inverter comprises a permanent magnetic synchronous wind driven generator (1), the permanent magnetic synchronous wind driven generator (1) is connected with a storage battery (3) via a three-phase rectifying circuit (2), the storage battery is connected with a step-up transformer (5) via an inverter circuit (7), the other end of the step-up transformer is an output end, the step-up transformer is connected with a voltage closed loop control circuit (8) via a rectifying and voltage step-down circuit (7), the voltage closed loop control circuit is connected with a constant current chopper circuit (10) via a control loop (15), the constant current chopper circuit is connected with the inverter circuit via a driving circuit (9), the inverter circuit is connected with the control loop via an overcurrent protector (6), and a conducting wire between the storage battery and the inverter circuit is connected with a stepless unloading circuit (12). The off-grid small-sized wind power generation control inverter is used for wind-power generation.
Description
Technical field:
The utility model relates to a kind of inversion control device of off-grid small-sized wind generator system, is exactly to control wind-driven generator to charge a battery specifically, is dc inverter the alternating current supply user use of constant voltage constant frequency simultaneously.
Background technology:
Existing off-grid small-sized wind power generation control alternation device, Starting mode commonly used is common soft starting mode, but its peak current is still very big, easily power device is damaged, and common control mode is that whole off-load is all connected, this moment, storage battery also was not full of, but energy all consumes in off-load, causes the waste of energy, perhaps connects off-load resistance stage by stage, but can only accomplish that generally effect is undesirable about five or six grades.
Summary of the invention:
The purpose of this utility model provides a kind of kernel control chip that adopts powerful single-chip microcomputer as inverter, this control inverter is except that having soft start control, also increased the Current limited Control function of start constant current chopper, what off-load was partly adopted is the stepless off-load of pulse-width modulation PWM, the very simple off-grid small-sized wind power generation control alternation device of peripheral components.
Above-mentioned purpose realizes by following technical scheme:
Off-grid small-sized wind power generation control alternation device; its composition comprises: permanent magnet synchronous wind generator; described permanent magnet synchronous wind generator connects rectified three-phase circuit; described rectified three-phase circuit connects storage battery; described storage battery connects inverter circuit; described inverter circuit connects step-up transformer; the other end of described step-up transformer is an output; described step-up transformer connects the rectification reduction voltage circuit; described rectification reduction voltage circuit connects the voltage close loop control circuit; described voltage close loop control circuit connects control loop; described control loop connects the constant current chopper circuit; described constant current chopper circuit connects drive circuit; described drive circuit connects inverter circuit; described inverter circuit connects overcurrent protector, and described overcurrent protector connects control loop, and described storage battery is connected stepless discharging circuit with lead between the inverter circuit.
Described off-grid small-sized wind power generation control alternation device, described control loop is made up of SG3525 pulse-width modulation application-specific integrated circuit (ASIC), single-chip microcomputer PIC16F873A and condition indication circuit, described single-chip microcomputer PIC16F873A connects SG3525 pulse-width modulation application-specific integrated circuit (ASIC), described single-chip microcomputer PIC16F873A connection status indicating circuit.
Beneficial effect:
1. the utility model is low-cost economical control inverter, and its control inverter is made of single-chip microcomputer, SG3525 and IR2110 etc., and inversion partly adopts insulating gate type field effect tube MOSFET as main switch element, has perfect defencive function.Operation shows that device has good characteristic for a long time, compares with existing wind power generation control inverter simultaneously to have cost characteristics low, easy to use.
2. control inverter of the present utility model adopts the stepless off-load of pulse-width modulation PWM, under normal off-load situation, can guarantee that battery tension is near float charge voltage, just unnecessary electric energy is discharged on the off-load resistance, and guaranteed the optimal charge characteristic of storage battery, make electric energy be fully used, and guaranteed the useful life of storage battery.
3. the utility model possesses various defencive functions, and long-play shows that the defencive function of device is perfect, and Control System Design is reasonable, and low price meets economy principle.
4. power driving circuit of the present utility model adopts the IR2110 integrated power chip for driving of IR company, in chip, adopted highly integrated level conversion technology, simplified the control requirement of logical circuit greatly, improved the reliability of control circuit simultaneously power device.Especially adopt the bootstrapping Driving technique, make drive circuit drive and significantly reduce, on engineering, significantly reduced control transformer volume and power supply number, reduced product cost than other IC.
5. pulse-width modulation PWM waveform of the present utility model realized by special integrated chip SG3525, thereby reduced the sequential operation amount, simplified system configuration, improved monolithic processor controlled real-time.
Description of drawings:
Accompanying drawing 1 is the overall construction drawing of the utility model system.
Accompanying drawing 2 is a control loop circuit diagram of the present utility model.
Accompanying drawing 5 is the stepless discharging circuit figure of pulse-width modulation PWM of the present utility model.
Accompanying drawing 6 is current foldback circuit figure of the present utility model.
Accompanying drawing 8 is a systems soft ware flow chart of the present utility model.
Embodiment:
Embodiment 1:
Off-grid small-sized wind power generation control alternation device; its composition comprises: permanent magnet synchronous wind generator 1; described permanent magnet synchronous wind generator 1 connects rectified three-phase circuit 2; described rectified three-phase circuit 2 connects storage battery 3; described storage battery 3 connects inverter circuit 4; described inverter circuit 4 connects step-up transformer 5; the other end of described step-up transformer 5 is an output; described step-up transformer 5 connects rectification reduction voltage circuit 7; described rectification reduction voltage circuit 7 connects voltage close loop control circuit 8; described voltage close loop control circuit 8 connects control loop 15; described control loop 15 connects constant current chopper circuit 10; described constant current chopper circuit 10 connects drive circuit 9; described drive circuit 9 connects inverter circuit 4; described inverter circuit 4 connects overcurrent protectors 6, and described overcurrent protector 6 connects control loops 15, and described storage battery 3 is connected stepless discharging circuit 12 with lead between the inverter circuit 4.
Described off-grid small-sized wind power generation control alternation device, described control loop 15 is made up of SG3525 pulse-width modulation application-specific integrated circuit (ASIC) 14, single-chip microcomputer PIC16F873A11 and condition indication circuit 13, described single-chip microcomputer PIC16F873A11 connects SG3525 pulse-width modulation application-specific integrated circuit (ASIC) 14, described single-chip microcomputer PIC16F873A11 connection status indicating circuit 13.
Described off-grid small-sized wind power generation control alternation device, described all circuit all connect with lead.
Operation principle:
The alternating current of the variable voltage variable frequency of wind-driven generator output becomes direct current and is defeated by charge in batteries after over commutation, inverter circuit is made of the full-bridge circuit that four insulated-gate type power field effect pipe MOSFET form, gather load current by sampling resistor, being combined by 8-bit microcontroller PIC16F873A and special-purpose pulse-width modulation PWM control chip SG3525 constitutes control loop; The pulse-width modulation PWM control signal process that pulse width modulating chip SG3525 produces and the integration of constant current chopper circuit, and then the break-make of giving drive circuit IR2110 control insulated-gate type power field effect pipe MOSFET; By the sampling output AC voltage, and it is carried out the closed-loop control that the rectification step-down has realized voltage; Protections such as single-chip microcomputer is under-voltage by analog-digital conversion a/d sampling realization, overload.
Main control unit, this link produce circuit SG3525 by single-chip microcomputer PIC16F873A and pulse-width modulation PWM to be formed, and adopts PIC16F873A to be because it has five tunnel ten analog-digital conversion a/d conversion mouth.
Pulse-width modulation special chip SG3525, the wide 8-35V of operating voltage range; Dead Time is adjustable; Built-in soft starting circuit; The pulse-width modulation PWM lock function; Binary channels complementary output pulse-width modulation PWM.
Power driving circuit adopts the IR2110 integrated power chip for driving of IR company, in chip, adopted highly integrated level conversion technology, when last pipe turn-offs, under when managing conducting, the six pin current potentials of IR2110 are+12V, the E point is+12V power supply ground that if ignore the conduction voltage drop of diode D3, then the voltage of bootstrap capacitor E11 is+12V; And when last pipe conducting; the voltage that E order when following pipe turn-offed is diode D3 pressure drop Vdc, and the 6 pin current potentials of IR2110 can not transition owing to bootstrap capacitor E11 voltage, and the six pin current potentials of instantaneous IR2110 are (Vdc+12) V; then bootstrap diode D3 bears the back-pressure shutoff, thus protection+12V power supply.Bootstrap capacitor E11 need adopt big capacitance, and native system is taken as 10 μ F, is that the voltage fluctuation of bootstrap capacitor is no more than 100mV under the condition of 10kHz in carrier frequency, can be safely thereby guarantee to go up the bridge power switch pipe, operation reliably.
Constant current chopper circuit: added the control of hardware constant current chopper, when system boot, peak current is very big, damage power tube easily, when the electric current of gathering surpasses set-point, the pin of IC4A output high level, through output low level behind the not gate IC6A, through with door IC5A and PWM with after block immediately and export, thereby make device for power switching insulated-gate type power field effect pipe MOSFET shutoff, electric current descends rapidly; When sample rate current during, the pin output low level of IC4A less than set-point, through not gate IC6A output high level, pass through again with door IC5A after the output pulse width modulation (PWM), power device insulated-gate type power field effect pipe MOSFET opens, output current increases; When greater than set-point, block output immediately, realized the function of start current limliting.
The stepless discharging circuit of pulse-width modulation PWM: added the stepless discharging circuit of pulse-width modulation PWM; the stepless off-load control of pulse-width modulation PWM is meant when output voltage reaches certain value; the ten pin voltages of IC8C begin relatively to produce pulse-width modulation PWM driving switch device isolation grid type power field effect pipe MOSFET conducting with the five pin sawtooth waveforms of SG3525; increase along with cell voltage; the ten pin voltages of IC8C increase gradually; increase gradually with the relatively back duty ratio of its nine pin sawtooth waveforms; reach 100% up to duty ratio; unnecessary electric energy is added on the off-load resistance fully, has protected storage battery and control system effectively.
Current foldback circuit: after the electric current of feedback becomes voltage by sampling resistor; compare with set-point; when greater than set-point; the pin output high level of IC7A; enter single-chip microcomputer PIC16F873A external interrupt mouth RB0/INT; single-chip microcomputer RB0/INT pin high level occurs and enters interruption, blocks the output of pulse-width modulation PWM.
Rectification reduction voltage circuit, voltage close loop control: sampling exchanges the voltage of output, by the rectifier bridge rectification, obtain a Voltage Feedback by resistance R 1 and R2 dividing potential drop then, be sent to two pin of voltage close loop controlling unit IC3A, after IC3A integration adjusting processing,, output signal is given the Compen end of SG3525 via resistance R 14 and R33 dividing potential drop, final formation voltage close loop control circuit makes the alternating current of output be stabilized in civil power 220V.
The software overload protection: i.e. the Current Control of software, system also has the function of software protection in hardware protection.By software detection, when overload occurring, stop the output of inverter.
Overheat protector: by temperature switch control, when temperature reaches the critical point of temperature switch, the temperature switch closure, fan is started working, and when temperature lowered, temperature switch was opened, and fan quits work.
Under-voltage protection: when brownout, electrorheological is big, damages power device easily.Therefore system quits work when battery is under-voltage.
Claims (2)
1. an off-grid small-sized wind power generation is controlled the alternation device; its composition comprises: permanent magnet synchronous wind generator; it is characterized in that: described permanent magnet synchronous wind generator connects rectified three-phase circuit; described rectified three-phase circuit connects storage battery; described storage battery connects inverter circuit; described inverter circuit connects step-up transformer; the other end of described step-up transformer is an output; described step-up transformer connects the rectification reduction voltage circuit; described rectification reduction voltage circuit connects the voltage close loop control circuit; described voltage close loop control circuit connects control loop; described control loop connects the constant current chopper circuit; described constant current chopper circuit connects drive circuit; described drive circuit connects inverter circuit; described inverter circuit connects overcurrent protector, and described overcurrent protector connects control loop, and described storage battery is connected stepless discharging circuit with lead between the inverter circuit.
2. off-grid small-sized wind power generation control alternation device according to claim 1, it is characterized in that: described control loop is made up of SG3525 pulse-width modulation application-specific integrated circuit (ASIC), single-chip microcomputer PIC16F873A and condition indication circuit, described single-chip microcomputer PIC16F873A connects SG3525 pulse-width modulation application-specific integrated circuit (ASIC), described single-chip microcomputer PIC16F873A connection status indicating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201011154U CN201556964U (en) | 2009-10-21 | 2009-10-21 | Off-grid small-sized wind power generation control inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201011154U CN201556964U (en) | 2009-10-21 | 2009-10-21 | Off-grid small-sized wind power generation control inverter |
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| Publication Number | Publication Date |
|---|---|
| CN201556964U true CN201556964U (en) | 2010-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201011154U Expired - Fee Related CN201556964U (en) | 2009-10-21 | 2009-10-21 | Off-grid small-sized wind power generation control inverter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452078A (en) * | 2016-10-21 | 2017-02-22 | 上海汽车集团股份有限公司 | Control method for constant current mode of DC/DC converter |
| CN112730960A (en) * | 2021-01-22 | 2021-04-30 | 濮阳乐高电器有限公司 | Peak protection circuit |
-
2009
- 2009-10-21 CN CN2009201011154U patent/CN201556964U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452078A (en) * | 2016-10-21 | 2017-02-22 | 上海汽车集团股份有限公司 | Control method for constant current mode of DC/DC converter |
| CN106452078B (en) * | 2016-10-21 | 2019-04-23 | 上海汽车集团股份有限公司 | A kind of DC/DC converter constant current mode control method |
| CN112730960A (en) * | 2021-01-22 | 2021-04-30 | 濮阳乐高电器有限公司 | Peak protection circuit |
| CN112730960B (en) * | 2021-01-22 | 2023-10-27 | 濮阳乐高电器有限公司 | Peak protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20111021 |