CN203840232U - Sine wave inverter for gasoline and diesel generating sets - Google Patents
Sine wave inverter for gasoline and diesel generating sets Download PDFInfo
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- CN203840232U CN203840232U CN201420161889.7U CN201420161889U CN203840232U CN 203840232 U CN203840232 U CN 203840232U CN 201420161889 U CN201420161889 U CN 201420161889U CN 203840232 U CN203840232 U CN 203840232U
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Abstract
The utility model relates to a sine wave inverter for gasoline and diesel generating sets. The sine wave inverter comprises a generator output power circuit, a front rectification voltage stabilizing filter circuit, an inversion control circuit, an IGBT drive circuit, a full bridge inversion circuit, a filtering absorption circuit, a voltage sampling feedback circuit and a current sampling feedback circuit, wherein the generator output power circuit provides power to the entire inverter, the front rectification voltage stabilizing filter circuit is electrically connected with the full bridge inversion circuit, the IGBT drive circuit is electrically connected with the inversion control circuit and the full bridge inversion circuit, the filtering absorption circuit is electrically connected with the full bridge inversion circuit, a sine wave output circuit is arranged behind the filtering absorption circuit and electrically connected with the voltage sampling feedback circuit and the current sampling feedback circuit, the inversion control circuit is electrically connected with a temperature detection circuit and a state display circuit. An integrated circuit is employed to minimize size and EMI interference, and novel protection circuit is employed to improve the stability and safety of a frequency converter.
Description
Technical field
The utility model relates to a kind of sinewave inverter, is specifically related to a kind of integrated circuit and reduces volume and EMI interference, adopts new protective circuit, improves the stability of frequency converter and the petrol and diesel oil generating set sinewave inverter of fail safe.
Background technology
Inversion transformation technique is the transformation by reciprocal direction power technology of commutation technique, and the device of converting direct-current power into alternating-current power is called to inverter.According to output waveform, can be divided into square-wave inverter and sinewave inverter, current most load requests are input as sine wave, so sinewave inverter has obtained increasing research and concern.
From the beginning of the nineties in last century up to the present, be popular for the whole world, the inverter in market, has experienced repeatedly and to have changed.Initial inverter is that saturation type converter is recommended in self-excitation, the saturation type converter circuit that this type of is original, and efficiency is low, and loss is large, reliability extreme difference.In order to solve the problem that inverter exists in the past, inversion transformation technique is to the lifting that has obtained now matter, but also there is some problems and defect, need to improve circuit structure, antijamming capability, volume and whole cooling system, promote overall performance and the reliability of inverter.
Generally there are the following problems for common inverter at present: volume is large, circuit structure is complicated, be easily disturbed, integral heat sink system schema is outmoded, power consumption large, poor stability.
Utility model content
For the problems referred to above, main purpose of the present utility model is to provide a kind of integrated circuit to reduce volume and EMI disturbs, and adopts new protective circuit, improves the stability of frequency converter and the petrol and diesel oil generating set sinewave inverter of fail safe.
The utility model solves above-mentioned technical problem by following technical proposals: a kind of petrol and diesel oil generating set sinewave inverter, described petrol and diesel oil generating set comprises generator output power supply circuit, front end rectifying and voltage-stabilizing filter circuit, inverter control circuit, IGBT drive circuit, full bridge inverter, filtering absorbing circuit, voltage sample feedback circuit and current sample feedback circuit with sinewave inverter, described generator output power supply circuit powers to whole petrol and diesel oil generating set with sinewave inverter
After engine start, exporting two-way electricity: a road is main winding, is for full bridge inverter provides electric energy after rectifying and voltage-stabilizing filtering; Another road is auxiliary winding impulse circuit, operation electric energy is provided to inverter control circuit and IGBT drive circuit;
Front end rectifying and voltage-stabilizing filter circuit and full bridge inverter are electrically connected to, IGBT drive circuit is electrically connected to respectively with inverter control circuit and full bridge inverter, on full bridge inverter, be electrically connected with filtering absorbing circuit, after filtering absorbing circuit, be sinusoidal wave output circuit, on sinusoidal wave output circuit, be electrically connected with voltage sample feedback circuit and current sample feedback circuit;
On inverter control circuit, be electrically connected with temperature sensing circuit and status display circuit.
In preferred embodiment of the present utility model, on described auxiliary winding impulse circuit, be connected with auxiliary winding undervoltage detection circuit.
In preferred embodiment of the present utility model, described IGBT drive circuit adopts IGBT to drive chip HCLP-3120.
In preferred embodiment of the present utility model, described front end rectifying and voltage-stabilizing filter circuit adopts adjustable precise shunt regulator TL431 to control.
In preferred embodiment of the present utility model, described sinusoidal wave output circuit adopts step-down transformer to obtain voltage waveform and magnitude of voltage size.
In preferred embodiment of the present utility model, described front end rectifying and voltage-stabilizing filter circuit is by full-bridge half control the electric circuit constitute, busbar voltage through rectifying and wave-filtering is sampled, and with adjustable precise shunt regulator, TL431 controls, and controls reverse-blocking tetrode thyristor move by light-coupled isolation.
In preferred embodiment of the present utility model, in described auxiliary winding undervoltage detection circuit, adopt triode 5401.
Positive progressive effect of the present utility model is: the petrol and diesel oil generating set that the utility model provides has the following advantages with sinewave inverter tool:
(1), circuit board forms with main power board (comprising front end rectifying and voltage-stabilizing, Switching Power Supply, protection sampling and inversion output), power board and three parts of inversion control plate, reasonably assembles with fin the area occupied that reduces circuit board.
(2), simplify circuit, adopt partly integrated chip (as IGBT drives chip HCLP-3120) to replace IGBT drive circuit in the past, this chip drives ability is strong, increases electrical isolation, reduces device, improves the antijamming capability of circuit.
(3), front end regulator rectifier circuit, with adjustable precise shunt regulator TL431, control, by light-coupled isolation, through two-stage controllable silicon, trigger to realize stable to busbar voltage.This circuit voltage is stable precisely, and bringing onto load while impacting busbar voltage short recovery time.
(4), for preventing that engine mounted longitudinally racing from causing front end input voltage too high and out of control, front end regulator rectifier circuit has been done to anti-improvement out of control.
(5), output voltage sample circuit, adopt step-down transformer to obtain voltage waveform and magnitude of voltage size.This circuit electrical isolation, voltage-tracing is timely, and error is little.
(6), overload and short-circuit protection circuit, adopt current transformer to take current signal and reference signal to compare to determine, this protective ratio in the past power resistor samples sensitive, accurate, electrical isolation, idle.
(7), heat radiation main part by aluminum thermal fin and air-draft-type turbofan, formed, abandoned the bleed type fan of cluster engine in the past.The air channel of heat radiation also improves to some extent, and the wind on past inverter is the hot blast that engine transmits over there, integral heat sink effect extreme difference, and air channel separates now, is not subject to engine thermal wind effect.
Accompanying drawing explanation
Fig. 1 is that the utility model is arranged on the structural representation in casing.
Fig. 2 is the structured flowchart of sinewave inverter.
The sinewave inverter workflow diagram that Fig. 3 provides for the utility model.
Fig. 4 is the structural representation of controlling circuit of voltage regulation in front end rectifying and voltage-stabilizing filter circuit.
Fig. 5 is the structural representation of front end full-bridge half control circuit in front end rectifying and voltage-stabilizing filter circuit.
Fig. 6 is the structural representation of inverter control circuit.
Fig. 7 is the structural representation of IGBT drive circuit.
Fig. 8 is the structural representation of full bridge inverter.
Fig. 9 is structural representation under-voltage, short-circuit detecting circuit.
Figure 10 is the structural representation of auxiliary winding undervoltage detection circuit.
Embodiment
Below in conjunction with accompanying drawing, provide the utility model preferred embodiment, to describe the technical solution of the utility model in detail.
Fig. 1 is that the utility model is arranged on the structural representation in casing.As shown in Figure 1: the petrol and diesel oil generating set that the utility model provides is arranged in outer case 100 with sinewave inverter, 400 the inverter providing for the utility model and the combination 400 of fin are provided in Fig. 1, after the combination of inverter and fin 400 is arranged in outer case 100, heat abstractor 200 is installed in outer case 100 again, heat abstractor 200 generally can be elected air-draft-type turbofan as, install after heat abstractor 200 outer case side cover 300 on outer case 100 upper covers.
After above four Components Compositions get up, the inverter main body that the utility model provides engages completely with outer case 100 inside, only reserves air outlet 101 opposite air-vents 301, forms a U-shaped air channel.After air-draft-type turbofan is opened, cold wind sucks from the air-vent 301 of outer case side cover 3, first surface device temperature is taken away, through U-shaped air channel, the inductance of inverter bottom and the temperature on fin are taken away, finally by air-draft-type turbofan, hot blast is discharged.
Fig. 2 is the structured flowchart of sinewave inverter, as shown in Figure 2: the petrol and diesel oil generating set that the utility model provides comprises generator output power supply circuit 1, front end rectifying and voltage-stabilizing filter circuit 2, inverter control circuit 3, IGBT drive circuit 4, full bridge inverter 5, filtering absorbing circuit 6, voltage sample feedback circuit 7 and current sample feedback circuit 8 with sinewave inverter, generator output power supply circuit 1 powers to whole petrol and diesel oil generating set with sinewave inverter.
After engine start, exporting two-way electricity: a road is main winding, is for full bridge inverter 6 provides electric energy after rectifying and voltage-stabilizing filtering; Another road is auxiliary winding impulse circuit 9, operation electric energy is provided to inverter control circuit 3 and IGBT drive circuit 4.
Front end rectifying and voltage-stabilizing filter circuit 2 and full bridge inverter 5 are electrically connected to, IGBT drive circuit 4 is electrically connected to respectively with inverter control circuit 3 and full bridge inverter 5, on full bridge inverter 5, be electrically connected with filtering absorbing circuit 6, after filtering absorbing circuit 6, be sinusoidal wave output circuit 10, on sinusoidal wave output circuit 10, be electrically connected with voltage sample feedback circuit 7 and current sample feedback circuit 8.
On inverter control circuit 3, be electrically connected with temperature sensing circuit 11 and status display circuit 12.On auxiliary winding impulse circuit 9, be connected with auxiliary winding undervoltage detection circuit 13.
The sinewave inverter workflow diagram that Fig. 3 provides for the utility model.As shown in Figure 3: in the utility model, after engine start, export two-way electricity, a road is main winding, be for full bridge inverter provides electric energy after rectifying and voltage-stabilizing filtering; Another road is auxiliary winding, and being provides operation electric energy for main chip and IGBT drive circuit.After engine start, there is time delay in 3 seconds, whether auxiliary winding electricity is differentiated lower than normal working voltage, if belong to the under-voltage protected mode that enters, if normal sine wave drive circuit starts normal work.The drive waveforms of drive circuit output is delivered to IGBT drive circuit after certain processing, by delivering to full bridge inverter after isolation drive, directly drives IGBT to work, then can be for the sine voltage of each load by certain filtering and absorbing circuit output.In whole service process, output voltage detecting circuit, output current detection circuit and auxiliary winding undervoltage detection circuit are above always in detected state.When output voltage being detected, send output under-voltage protection signal when limiting minimum voltage, when output current overload or short circuit being detected, send corresponding guard signal, when detecting, send auxiliary winding under-voltage protection signal when under-voltage for auxiliary winding.When IGBT Drive Protecting Circuit receives after corresponding signal, through processing, then make inverter enter protected mode.In electric circuit inspection circuit, also having a road is that sampling is carried out degeneratively to single-chip microcomputer, for waveform voltage, compensates.
Fig. 4 is the structural representation of controlling circuit of voltage regulation in front end rectifying and voltage-stabilizing filter circuit.Fig. 5 is the structural representation of front end full-bridge half control circuit in front end rectifying and voltage-stabilizing filter circuit.
Circuit as shown in Figure 4: front end rectifying and voltage-stabilizing filter circuit, by full-bridge half control the electric circuit constitute, is sampled to the busbar voltage through rectifying and wave-filtering, with adjustable precise shunt regulator, TL431 controls, and controls reverse-blocking tetrode thyristor move by light-coupled isolation.
Circuit as shown in Figure 5: trigger to realize stable to busbar voltage through two-stage controllable silicon.The first order is micro-touch Power Generation Road, and the second level is high-power circuits for triggering.
In test process, find in motor speed higher situation out of control, because generator voltage pulse output is too high, over the withstand voltage of first order micro-trigger controlled silicon, cause it out of control.This problem is improved, guaranteeing to provide under the condition of second level controllable silicon drive current, the voltage being carried on first order micro-trigger controlled silicon is carried out to dividing potential drop, solved problem out of control.
Fig. 6 is the structural representation of inverter control circuit.As shown in Figure 6: this part is the core of inverter, by pic chip, produce two-way SPWM signal, through not gate, produce four road SPWM signals, then through adding dead band with Men Gei tetra-road signals, send IGBT drive circuit to.In circuit; by not gate with door, added SPWM signal hardware latching circuit, when having fault-signal to produce, this fault-signal drags down four by not gate and goes up the level of (pin 2, pin 4, pin 10, pin 12) with door; Jiang Si road drives signal all to block and drag down, and plays Immediate Protective Effects.Provide state to show and key-press input interface, shown respectively running status, malfunction and detect key-press status.
Fig. 7 is the structural representation of IGBT drive circuit, as shown in Figure 7: the utility model adopts HCPL-3120 to drive chip, by gallium arsenide phosphide optical coupler and power output circuit, formed, be characterized in: prime and the isolation of rear class electrical equipment, driving force is strong, quick closing valve speed 0.5 μ S, supply voltage scope 15～30V.Driver output voltage signal adopts generating positive and negative voltage to drive, and positive drive voltage is 15V, and negative drive voltage is-5V; The advantage of adopting is in this way: can make effectively and rapidly IGBT turn on and off, reduce the loss turning on and off in process.Each drives chip to adopt 20V insulating power supply, has prevented the interference that IGBT respectively works between loop.
Fig. 8 is the structural representation of full bridge inverter, as shown in Figure 8: in the utility model, high-power sinewave inverter all adopts the mode of full-bridge inverting.Adopt differential design with forward on IGBT connecting circuit and negative sense contact resistance, can make IGBT conducting slightly a little slower, turn-off more hurry up.According to the good forward reverse resistance of apolegamy of the IGBT Rational Parameters adopting, loss during switching over that can more effective reduction IGBT.
Fig. 9 is structural representation under-voltage, short-circuit detecting circuit, as shown in Figure 9: in the utility model, this circuit adopts voltage comparator LM293, and for inverter output under-voltage protection and output short circuit protection.Output under-voltage protection: be that voltage effective value that Voltage-output is transformed by low-tension transformer and the voltage reference reference value of setting contrast; lower than reference value comparator OA output output high level; until delay circuit delays after 5 seconds, single-chip microcomputer receives that under-voltage protection signal protects.Output short circuit protection: be by by mutual inductor sample to electric current instantaneous signal and the drive waveforms reference signal that provides of single-chip microcomputer compare by a certain percentage; once surpassing the multiplying power explanation of design, current signal is short-circuited; comparator OA output output high level; by not gate with gate control, block four tunnels driving signals, single-chip microcomputer is received short-circuit signal protection.
Figure 10 is the structural representation of auxiliary winding undervoltage detection circuit, as shown in figure 10: in the utility model, auxiliary winding undervoltage detection circuit uses the characteristic of triode 5401, and when base stage B lower voltage is to than the 5V reference voltage of emitter E during lower than 0.5V, collector electrode C exports high level.Adopt this characteristic, when engine shutdown or engine shakiness, can effectively prevent that the inverter causing because auxiliary winding voltage is low from damaging.
Circuit board of the present utility model forms with main power board (comprising front end rectifying and voltage-stabilizing, Switching Power Supply, protection sampling and inversion output), power board and three parts of inversion control plate, reasonably assembles with fin the area occupied that reduces circuit board.
The utility model is simplified circuit, adopts partly integrated chip (as IGBT drives chip HCLP-3120) to replace IGBT drive circuit in the past, and this chip drives ability is strong, increases electrical isolation, reduces device, improves the antijamming capability of circuit.
The utility model front end regulator rectifier circuit, with adjustable precise shunt regulator, TL431 controls, and by light-coupled isolation, through two-stage controllable silicon, triggers to realize stablizing busbar voltage.This circuit voltage is stable precisely, and bringing onto load while impacting busbar voltage short recovery time.
For preventing that engine mounted longitudinally racing from causing front end input voltage too high and out of control, the utility model has been done anti-improvement out of control to front end regulator rectifier circuit.
Output voltage sample circuit of the present utility model, adopts step-down transformer to obtain voltage waveform and magnitude of voltage size.This circuit electrical isolation, voltage-tracing is timely, and error is little.
Overload of the present utility model and short-circuit protection circuit, adopt current transformer to take current signal and reference signal to compare to determine.The power resistor sampling in the past of this protective ratio is sensitive, accurate, electrical isolation, idle.
The utility model is in being arranged on casing time, and heat radiation main part is comprised of aluminum thermal fin and air-draft-type turbofan, has abandoned the bleed type fan of cluster engine in the past.The air channel of heat radiation also improves to some extent, and the wind on past inverter is the hot blast that engine transmits over there, integral heat sink effect extreme difference, and air channel separates now, is not subject to engine thermal wind effect.Above embodiment of the present utility model is illustrated, but the utility model is as limit, only otherwise depart from aim of the present utility model, the utility model can also have various variations.
Claims (7)
1. a petrol and diesel oil generating set sinewave inverter, it is characterized in that: described petrol and diesel oil generating set comprises generator output power supply circuit, front end rectifying and voltage-stabilizing filter circuit, inverter control circuit, IGBT drive circuit, full bridge inverter, filtering absorbing circuit, voltage sample feedback circuit and current sample feedback circuit with sinewave inverter, described generator output power supply circuit powers to whole petrol and diesel oil generating set with sinewave inverter;
After engine start, exporting two-way electricity: a road is main winding, is for full bridge inverter provides electric energy after rectifying and voltage-stabilizing filtering; Another road is auxiliary winding impulse circuit, operation electric energy is provided to inverter control circuit and IGBT drive circuit;
Front end rectifying and voltage-stabilizing filter circuit and full bridge inverter are electrically connected to, IGBT drive circuit is electrically connected to respectively with inverter control circuit and full bridge inverter, on full bridge inverter, be electrically connected with filtering absorbing circuit, after filtering absorbing circuit, be sinusoidal wave output circuit, on sinusoidal wave output circuit, be electrically connected with voltage sample feedback circuit and current sample feedback circuit;
On inverter control circuit, be electrically connected with temperature sensing circuit and status display circuit.
2. petrol and diesel oil generating set sinewave inverter according to claim 1, is characterized in that: on described auxiliary winding impulse circuit, be connected with auxiliary winding undervoltage detection circuit.
3. petrol and diesel oil generating set sinewave inverter according to claim 1, is characterized in that: described IGBT drive circuit adopts IGBT to drive chip HCLP-3120.
4. petrol and diesel oil generating set sinewave inverter according to claim 1, is characterized in that: described front end rectifying and voltage-stabilizing filter circuit adopts adjustable precise shunt regulator TL431 to control.
5. petrol and diesel oil generating set sinewave inverter according to claim 1, is characterized in that: described sinusoidal wave output circuit adopts step-down transformer to obtain voltage waveform and magnitude of voltage size.
6. petrol and diesel oil generating set sinewave inverter according to claim 1, it is characterized in that: described front end rectifying and voltage-stabilizing filter circuit is by full-bridge half control the electric circuit constitute, busbar voltage through rectifying and wave-filtering is sampled, with adjustable precise shunt regulator TL431, control, by light-coupled isolation, control reverse-blocking tetrode thyristor and move.
7. petrol and diesel oil generating set sinewave inverter according to claim 1, is characterized in that: in described auxiliary winding undervoltage detection circuit, adopt triode 5401.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420161889.7U CN203840232U (en) | 2014-04-03 | 2014-04-03 | Sine wave inverter for gasoline and diesel generating sets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420161889.7U CN203840232U (en) | 2014-04-03 | 2014-04-03 | Sine wave inverter for gasoline and diesel generating sets |
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| Publication Number | Publication Date |
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| CN203840232U true CN203840232U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420161889.7U Expired - Fee Related CN203840232U (en) | 2014-04-03 | 2014-04-03 | Sine wave inverter for gasoline and diesel generating sets |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362863A (en) * | 2014-11-05 | 2015-02-18 | 淄博滤波电器有限公司 | Frequency conversion method and device for medium and large type direct-current power supply |
| CN106300277A (en) * | 2016-08-31 | 2017-01-04 | 苏州迈力电器有限公司 | High-frequency inverter short-circuit protection control device |
| CN108258883A (en) * | 2018-03-30 | 2018-07-06 | 湖州旭源电气科技有限公司 | A kind of Switching Power Supply with overload protection function |
-
2014
- 2014-04-03 CN CN201420161889.7U patent/CN203840232U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362863A (en) * | 2014-11-05 | 2015-02-18 | 淄博滤波电器有限公司 | Frequency conversion method and device for medium and large type direct-current power supply |
| CN106300277A (en) * | 2016-08-31 | 2017-01-04 | 苏州迈力电器有限公司 | High-frequency inverter short-circuit protection control device |
| CN108258883A (en) * | 2018-03-30 | 2018-07-06 | 湖州旭源电气科技有限公司 | A kind of Switching Power Supply with overload protection function |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20160403 |