CN201360235Y - Inverter applicable to AC compressor - Google Patents
Inverter applicable to AC compressor Download PDFInfo
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- CN201360235Y CN201360235Y CNU2008202028124U CN200820202812U CN201360235Y CN 201360235 Y CN201360235 Y CN 201360235Y CN U2008202028124 U CNU2008202028124 U CN U2008202028124U CN 200820202812 U CN200820202812 U CN 200820202812U CN 201360235 Y CN201360235 Y CN 201360235Y
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Abstract
The utility model relates to an inverter applicable to an AC compressor, which is characterized by comprising a high-frequency boost circuit, a rectifying circuit, a DC / AC inverter circuit, an output automatic voltage adjusting circuit and a startup protection circuit. The inverter applicable to an AC compressor can output AC power which meets the use requirement of the AC compressor, thereby providing a DC / AC inverter which can quite well drive the AC compressor, and effectively solving the problem of using the AC compressor in places only with DC power supply.
Description
Technical field
The utility model relates to the field of using inverter to drive AC compressor, specifically is a kind of inverter that is applicable to AC compressor.
Background technology
Usually, AC compressor can only be used to that the 220V/110V alternating current is arranged (the America and Europe, Japan also has 200～240V, situations such as 100V, for sake of convenience, only with two kinds of exemplary voltages of 220V/110V as representative) place that provides.And for galvanic place can only be provided, as the field, car on ship or other the means of transportation, owing to there is not alternating current, can not directly use AC compressor.In the case, direct current compressor is a kind of common selection.But the direct current compressor complex structure, versatility is poor, so price is very high, the life-span is shorter.The selection of another possibility is by the DC/AC inverter, drives AC compressor again after the DC direct current is converted into the AC alternating current.But because the starting current of AC compressor is big, it is unreliable to cause starting, and use is restricted.
Summary of the invention
In order to overcome general inverter in the deficiency that exists aspect the driving AC compressor, the utility model provides a kind of DC/AC inverter that can drive AC compressor preferably.It utilizes the DC power supply, and by the conversion of DC/AC inverter, output meets the AC power that AC compressor is used, and can effectively solve in the place of having only DC power supply, uses the problem of AC compressor.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of inverter that is applicable to that AC compressor is used, and its structure comprises: a high frequency booster circuit, a rectification circuit, a DC/AC inverter circuit, an output automatic voltage regulating circuit, start protective circuit;
The input of described high frequency booster circuit and DC power supply join; the output of high frequency booster circuit and the input of rectification circuit are joined; the input of the output of rectification circuit and DC/AC inverter circuit is joined; the DC/AC inverter circuit is output as power load-AC compressor alternating current is provided; output automatic voltage regulating circuit and startup protective circuit are between DC/AC inverter circuit and power load-AC compressor, and the situation of AC compressor work feeds back to output automatic Regulation voltage stabilizing circuit and starts protective circuit.
The above-mentioned inverter that is applicable to AC compressor, wherein, described high frequency booster circuit is by control integrated circuit IC1, field effect transistor Q1, Q2, transformer T1 constitutes.
The above-mentioned inverter that is applicable to AC compressor, wherein, the full bridge rectifier that described rectification circuit is made up of four diode D1, D2, D3, D4.
The above-mentioned inverter that is applicable to AC compressor, wherein, described full bridge inverter is by control integrated circuit IC2, and field effect transistor Q3, Q4, Q5, Q6 constitute.
The above-mentioned inverter that is applicable to AC compressor, wherein, described output automatic voltage regulating circuit is by current-sensing circuit, the A/V current-to-voltage converting circuit, voltage amplifier circuit, voltage reference comparison circuit, logical operation circuit, output driving circuit, feedback circuit constitutes.
The above-mentioned inverter that is applicable to AC compressor, wherein, described startup protective circuit is by current-sensing circuit, the A/V current-to-voltage converting circuit, the voltage reference comparison circuit, delay circuit 1, logical operation circuit, delay circuit 2, output driving circuit constitutes.
Because the utility model has adopted above technical scheme, can export the AC power that meets the AC compressor use, thereby a kind of DC/AC inverter that can drive AC compressor preferably is provided.Effectively solve in the place of having only DC power supply, use the problem of AC compressor.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the circuit block diagram of inverter of the present utility model.
Fig. 2 is the block diagram of the output automatic voltage regulating circuit among Fig. 1.
Fig. 3 is the block diagram of the startup protective circuit of Fig. 1.
Fig. 4 is the circuit theory diagrams of Fig. 1.
Embodiment
Fig. 1 is the circuit block diagram of inverter of the present utility model.The input of high frequency booster circuit and DC power supply join; the output of high frequency booster circuit and the input of rectification circuit are joined; the input of the output of rectification circuit and DC/AC inverter circuit is joined; the DC/AC inverter circuit is output as power load-AC compressor alternating current is provided; output automatic voltage regulating circuit and startup protective circuit are between full bridge inverter and power load-AC compressor; the situation of AC compressor work also feeds back to output automatic Regulation voltage stabilizing circuit and starts protective circuit.
Its operation principle mainly is: the DC direct current obtains the high-frequency and high-voltage square wave by the high frequency booster circuit, behind rectification circuit, obtain stable high voltage direct current, be that effective value is the correction dextrorotation alternating current wave of 220V (or 110V) by the DC/AC inverter circuit with the galvanic current inversion then, at last through the output automatic voltage regulating circuit, situation according to the AC compressor work of feeding back automatically adjusts to output voltage, and output meets the alternating voltage that AC compressor is used.When compressor start is unusual, starts protective circuit and can detect and implement protection automatically.
Fig. 2 is the block diagram of the output automatic voltage regulating circuit among Fig. 1.
Export automatic voltage regulating circuit by current-sensing circuit, the A/V current-to-voltage converting circuit, voltage amplifier circuit, the voltage reference comparison circuit, logical operation circuit, output driving circuit, feedback circuit constitutes.
Current-sensing circuit is serially connected in the loop of the output of inverter and power load-compressor, the input of the output of current-sensing circuit and A/V current-to-voltage converting circuit is joined, the input of the output of A/V current-to-voltage converting circuit and voltage amplifier circuit and voltage reference comparison circuit is joined, voltage amplifier circuit and the output of voltage reference comparison circuit are joined with the input of logical operation circuit, the output of logical operation circuit and the input of output driving circuit are joined, the output of output driving circuit and the input of feedback circuit are joined, and the control integrated circuit IC2 of the output of feedback circuit and DC/AC inverter circuit joins.
Because power load-AC compressor is quitting work, start and the normal operation three phases, its electric current is different.Current-sensing circuit induces different electric currents, after the conversion of A/V current-to-voltage converting circuit, through two tunnel outputs.One the tunnel sends into voltage amplifier circuit amplifies, after another road is sent into the voltage reference comparison circuit and is compared, two tunnel signal conveys are to logical operation circuit, through after the logical operation, the operating state of determining current compressor is to be in to quit work, that stage of startup and normal operation three phases.Quit work and start this two operating states if be in, work by output driving circuit and feedback circuit so, make the inverter output LOW voltage, if be in the operating state of normal operation, by the work of output driving circuit and feedback circuit, make inverter amount of exports fixed working voltage so.Owing to adopted above circuit, the output automatic voltage regulating circuit can be exported different voltage according to the different phase of power load-AC compressor, thereby reaches the purpose of automatic Regulation.
Fig. 3 is the block diagram of the startup protective circuit among Fig. 1.
Start protective circuit by current-sensing circuit, the A/V current-to-voltage converting circuit, the voltage reference comparison circuit, delay circuit 1, logical operation circuit, delay circuit 2, output driving circuit constitutes.
Current-sensing circuit is serially connected in the loop of the output of inverter and power load-compressor, the input of the output of current-sensing circuit and A/V current-to-voltage converting circuit is joined, the input of the output of A/V current-to-voltage converting circuit and voltage reference comparison circuit is joined, the output of voltage reference comparison circuit is joined with the input of delay circuit 1, the output of delay circuit 1 and the input of logical operation circuit are joined, the input of the output of logical operation circuit and the input of output driving circuit and delay circuit 2 is joined, the output of delay circuit 2 feeds back to logical operation circuit again, and the control integrated circuit IC2 of output driving circuit and DC/AC inverter circuit joins.
Under the normal condition, the start-up course of AC compressor is through behind the starting state of short time, to enter the state of normal operation from out-of-work state.When startup is unusual, the situation of stall can take place, compressor can't turn round normally.The situation of the stall of AC compressor not only can make AC compressor work normally, also can have a strong impact on the life-span of electric current compressor simultaneously, is protected at this situation so the utility model adds the startup protective circuit.Because it is different with the electric current of starting state and normal operation to exchange the electric current of the stifled state of compression, sensor circuit induces different electric currents, after the conversion of A/V current-to-voltage converting circuit, after sending into the voltage reference comparison circuit and comparing, output to delay circuit 1 and carry out time ratio, signal conveys relatively through after the logical operation, determines whether the operating state of current compressor is in the stall state to logical operation circuit.If be in the stall state, logical operation circuit is leaded up to output driving circuit through two tunnel outputs, makes inverter stop output voltage, and the protection AC compressor can not suffer damage; Another road outputs to delay circuit 2, after time-delay, exports a feedback signal, and logical operation circuit is triggered, and logical operation circuit is resetted.After logical operation circuit resets, make inverter from newly starting working by output driving circuit.Owing to adopted above circuit; start protective circuit and can prevent that AC compressor from starting the harm to AC compressor of the stall state that produces under the abnormal conditions, can also automatically reset simultaneously after time-delay a period of time; make inverter from newly starting working, start the purpose of protecting thereby reach.
Fig. 4 is the circuit theory diagrams of Fig. 1.Wherein, the high frequency booster circuit adopts push-pull circuit.The centre cap of transformer T1 connects the end input of DC, and two ends of transformer T1 drive field effect transistor Q1, Q2 by integrated circuit (IC) 1 and control, and alternation produces high frequency square wave.Through step-up transformer T1, output high-frequency and high-voltage square wave.Integrated circuit (IC) 1 is built-in linear sawtooth waveforms oscillator.By Rt1, Ct1 regulates brilliant shake frequency.
Transformer T1 secondary winding connects the full-wave rectifying circuit of being made up of D1, D2, four diodes of D3, D4.By rectification, obtain stable high voltage direct current.Full bridge inverter constitutes the full-bridge type inverter circuit by Q3, Q4, four field effect transistor of Q5, Q6.Utilize integrated circuit (IC) 2 couples of field effect transistor Q3, Q4, Q5, Q6 to drive.By Rt2, Ct2 regulates brilliant shake frequency.Can control the effective value and the enforcement output protection of the voltage of output by 4 pin of IC2.
Export automatic voltage regulating circuit by current-sensing circuit, the A/V current-to-voltage converting circuit, voltage amplifier circuit, the voltage reference comparison circuit, logical operation circuit, output driving circuit, feedback circuit constitutes.Wherein current-sensing circuit is made of current transformer TA.The A/V current-to-voltage converting circuit is made of resistance R 3.Voltage amplifier circuit is by resistance R 4, R5, and comparison amplifier AMP1 forms.The voltage reference comparison circuit is by diode D5, resistance R 6, and R7, variable resistor RP1 and comparison amplifier AMP2 form.Logical operation circuit is made of integrated circuit (IC) 3.Output driving circuit is made of photoelectrical coupler N.Feedback circuit is by resistance R 10, R11, and R12 and voltage-stabiliser tube DZ form.
Because power load-AC compressor is quitting work, start and the normal operation three phases, its electric current is different.Current transformer TA induces different electric currents, be converted to voltage signal by resistance R 3 change-over circuits after, through two the tunnel output.One the tunnel sends into voltage amplifier circuit amplifies through comparison amplifier AMP1, after another road is sent into the voltage reference comparison circuit and is compared through the reference voltage after the variable resistor RP1 dividing potential drop, two tunnel signal conveys are to integrated circuit (IC) 3, through after the logical operation, the operating state of determining current compressor is to be in to quit work, that stage of startup and normal operation three phases.Quit work and start this two operating states if be in, pass through the work of output driving circuit photoelectrical coupler N and feedback circuit so, make the inverter output LOW voltage, if be in the operating state of normal operation, by the work of output driving circuit and feedback circuit, make inverter amount of exports fixed working voltage so.Owing to adopted above circuit, the output automatic voltage regulating circuit can be exported different voltage according to the different phase of power load-AC compressor, thereby reaches the purpose of automatic Regulation.
Start protective circuit by current-sensing circuit, A/V current-to-voltage converting circuit, voltage reference comparison circuit, delay circuit 1, logical operation circuit, delay circuit 2, output driving circuit.Wherein current-sensing circuit is made of current transformer TA.The A/V current-to-voltage converting circuit is made of resistance R 3.The voltage reference comparison circuit is by diode D5, resistance R 8, and R9, variable resistor RP2 and comparison amplifier AMP3 form.Delay circuit 1 is made of integrated circuit (IC) 4.Logical operation circuit is made of integrated circuit (IC) 5.Delay circuit 2 is made of integrated circuit (IC) 6.Output driving circuit is made of triode VT2.
Because it is different with the electric current of starting state and normal operation to exchange the electric current of the stifled state of compression, current transformer TA induces different electric currents, after being converted to voltage signal by resistance R 3 change-over circuits, output to delay circuit 1--integrated circuit (IC) 4 after sending into the voltage reference comparison circuit and comparing and carry out time ratio through the reference voltage after the variable resistor RP2 dividing potential drop, signal conveys relatively is to logical operation circuit--integrated circuit (IC) 5, through after the logical operation, determine whether the operating state of current compressor is in the stall state.If be in the stall state, logical operation circuit--integrated circuit (IC) 5 is through two tunnel outputs, the integrated circuit (IC) 2 of output driving circuit triode VT2 in the DC/AC inverter circuit of leading up to sent signal, makes inverter stop output voltage, and the protection AC compressor can not suffer damage; Another road outputs to delay circuit 2--integrated circuit (IC) 6, after time-delay, exports a feedback signal, and logical operation circuit integrated circuit (IC) 5 is triggered, and logical operation circuit is resetted.After logical operation circuit resets, send signal, make inverter from newly starting working by the integrated circuit (IC) 2 of output driving circuit triode VT2 in the DC/AC inverter circuit.Owing to adopted above circuit; start protective circuit and can prevent that AC compressor from starting the harm to AC compressor of the stall state that produces under the abnormal conditions, can also automatically reset simultaneously after time-delay a period of time; make inverter from newly starting working, start the purpose of protecting thereby reach.
The utility model can be exported the AC power that meets the AC compressor use, thereby a kind of DC/AC inverter that can drive AC compressor preferably is provided.Effectively solve in the place of having only DC power supply, use the problem of AC compressor.
Claims (6)
1. an inverter that is applicable to AC compressor is characterized in that: comprise that a high frequency booster circuit, a rectification circuit, a DC/AC inverter circuit, an output automatic voltage regulating circuit, start protective circuit;
The input of described high frequency booster circuit and DC power supply join; the output of high frequency booster circuit and the input of rectification circuit are joined; the input of the output of rectification circuit and DC/AC inverter circuit is joined; the DC/AC inverter circuit is output as power load-AC compressor alternating current is provided; output automatic voltage regulating circuit and startup protective circuit are between DC/AC inverter circuit and power load-AC compressor; the situation of AC compressor work feeds back to output automatic Regulation voltage stabilizing circuit and starts protective circuit.
2. as the right 1 described inverter that is applicable to AC compressor, it is characterized in that: described high frequency booster circuit is by control integrated circuit, field effect transistor, and transformer constitutes.
3. as the right 1 described inverter that is applicable to AC compressor, it is characterized in that: the full bridge rectifier that described rectification circuit is made up of four diodes.
4. as the right 1 described inverter that is applicable to AC compressor, it is characterized in that: described DC/AC inverter circuit is made of control integrated circuit, four field effect transistor.
5. as the right 1 described inverter that is applicable to AC compressor, it is characterized in that: described output automatic voltage regulating circuit is made of current-sensing circuit, A/V current-to-voltage converting circuit, voltage amplifier circuit, voltage reference comparison circuit, logical operation circuit, output driving circuit, feedback circuit; Current-sensing circuit induces different electric currents, after the conversion of A/V current-to-voltage converting circuit, through two tunnel outputs; One the tunnel sends into voltage amplifier circuit amplifies, after another road is sent into the voltage reference comparison circuit and is compared, two tunnel signal conveys are to logical operation circuit, through after the logical operation, the operating state of determining current compressor is to be in to quit work, that stage of startup and normal operation three phases; Quit work and start this two operating states if be in,, make the inverter output LOW voltage so by the work of output driving circuit and feedback circuit; If be in the operating state of normal operation,, make inverter amount of exports fixed working voltage so by the work of output driving circuit and feedback circuit.
6. as the right 1 described inverter that is applicable to AC compressor, it is characterized in that: described startup protective circuit is by current-sensing circuit, the A/V current-to-voltage converting circuit, the voltage reference comparison circuit, delay circuit 1, logical operation circuit, delay circuit 2, output driving circuit constitutes; Sensor circuit induces different electric currents, after the conversion of A/V current-to-voltage converting circuit, after sending into the voltage reference comparison circuit and comparing, output to delay circuit 1 and carry out time ratio, signal conveys relatively is to logical operation circuit, through after the logical operation, determine whether the operating state of current compressor is in the stall state; If be in the stall state, logical operation circuit is leaded up to output driving circuit through two tunnel outputs, makes inverter stop output voltage, and the protection AC compressor can not suffer damage; Another road outputs to delay circuit 2, after time-delay, exports a feedback signal, and logical operation circuit is triggered, and logical operation circuit is resetted; After logical operation circuit resets, make inverter from newly starting working by output driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202028124U CN201360235Y (en) | 2008-10-28 | 2008-10-28 | Inverter applicable to AC compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202028124U CN201360235Y (en) | 2008-10-28 | 2008-10-28 | Inverter applicable to AC compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201360235Y true CN201360235Y (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202028124U Expired - Fee Related CN201360235Y (en) | 2008-10-28 | 2008-10-28 | Inverter applicable to AC compressor |
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| CN (1) | CN201360235Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110481323A (en) * | 2019-10-15 | 2019-11-22 | 新誉轨道交通科技有限公司 | A kind of control method of train and its power supply unit and train power supply device |
-
2008
- 2008-10-28 CN CNU2008202028124U patent/CN201360235Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110481323A (en) * | 2019-10-15 | 2019-11-22 | 新誉轨道交通科技有限公司 | A kind of control method of train and its power supply unit and train power supply device |
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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: 20091209 Termination date: 20121028 |