CN101090255A - Air conditioner frequency conversion control circuit - Google Patents
Air conditioner frequency conversion control circuit Download PDFInfo
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- CN101090255A CN101090255A CN 200610086729 CN200610086729A CN101090255A CN 101090255 A CN101090255 A CN 101090255A CN 200610086729 CN200610086729 CN 200610086729 CN 200610086729 A CN200610086729 A CN 200610086729A CN 101090255 A CN101090255 A CN 101090255A
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- frequency conversion
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- air conditioner
- power supply
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Abstract
This invention relates to an air-condition conversion control circuit including an input part connecting to the DC Link part and a power factor compensation part reducing phase difference between voltage and current in the supply input into the compressor, which can reduce time for inputting charge current to the compensation part and the compressor and turn the current waveforms input into the supply approaching to sine wave so as to increase the stability of the supply input into the compressor and reduce phase difference between the voltage and current in the supply.
Description
Technical field
The present invention relates to a kind of air conditioner frequency conversion control circuit, especially a kind of is the power factor compensation portion that is connected to DC Link portion input of installing in the converter section of DC power supply by the power source conversion that will be supplied to air-conditioning, reduce the phasic difference between voltage waveform and the current waveform in the power supply in inputing to above-mentioned air-conditioning, thus the air conditioner frequency conversion control circuit that its power factor is compensated.
Background technology
Common air-conditioning is used to carry out functions such as cold-room, greenhouse, air cleaning, can be by to the indoor cold/warm air and purify the air of a room and be the indoor environment of people's Creating Comfort of spuing.
Aforesaid air-conditioning comprises indoor set, compressor that is made of heat exchanger and the off-premises station that is made of heat exchanger etc., by the power supply that is supplied in above-mentioned compressor or the heat exchanger is controlled, drives the operation of above-mentioned air-conditioning equipment.
For the motor to compressor drives, comprise the power supply unit of supplying a certain size power supply based on the air-conditioning of prior art; The frequency conversion portion that comprises DC Link portion; Direct voltage is converted to the frequency conversion portion (not marking among the figure) that is supplied to motor after the alternating voltage of certain voltage or frequency.
When the air-conditioning equipment based on prior art of structure moves as mentioned above, only just have electric current under the state of the power supply that inputs to above-mentioned power supply unit greater than the voltage that inputs to above-mentioned DC Link portion and flow through above-mentioned motor after above-mentioned compressor is driven, the problem that therefore can cause being supplied to the phasic difference between the voltage and current in the above-mentioned motor increases takes place.
In aforesaid air-conditioning, will be the compressor electric motor input ac power to above-mentioned motor from above-mentioned frequency conversion portion based on prior art.At this moment, input to alternating voltage in the above-mentioned motor and will have as shown in Figure 1 voltage and current waveform.
When being compared, the waveform of the waveform that inputs to the above-mentioned voltage in the above-mentioned motor and electric current can find, only just have electric current greater than the voltage that inputs to above-mentioned DC Link portion the time and flow through above-mentioned motor, current waveform and the phasic difference between the voltage waveform (D) of therefore importing power supply also will increase.
This moment is because have phasic difference between aforesaid electric current and the voltage in the above-mentioned air-conditioning, the power factor during above-mentioned operation of air conditioner also will significantly reduce.
This shows that above-mentioned existing air-conditioning obviously still has inconvenience and defective, and demands urgently further being improved in circuit structure design and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of novel air conditioner frequency conversion control circuit, just becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing air-conditioning exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of novel air conditioner frequency conversion control circuit, can improve general existing ac control circuit, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
Main purpose of the present invention is, overcome the defective that existing air-conditioning exists, and provide a kind of novel air conditioner frequency conversion control circuit, technical problem to be solved is to make it that a kind of air conditioner frequency conversion control circuit is provided, can make the charging current of DC Link portion input to above-mentioned power factor compensation with capacitor by the compensation of installation power factor with in the capacitor, make its to current waveform the position compensate mutually and minimizing and voltage waveform between phasic difference, thereby power factor is improved, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of air conditioner frequency conversion control circuit that the present invention proposes, it comprises: the DC Link portion that comprises capacitor is installed; AC power is converted to the converter section of DC power supply; DC power supply is converted to the frequency conversion portion that is used for the alternating voltage that compressor electric motor is driven and supplies; And the input that is connected to above-mentioned DC Link portion, in the input power supply that is supplied to the above-mentioned compressor motor by above-mentioned frequency conversion portion, reduce the power factor compensation portion of the phasic difference between the voltage and current.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid air conditioner frequency conversion control circuit, wherein said power factor compensation portion comprises more than one power factor compensation capacitor.
Aforesaid air conditioner frequency conversion control circuit, wherein said power factor compensation capacitor volume be installed on above-mentioned DC Link portion condenser capacity 1/10th.
Aforesaid air conditioner frequency conversion control circuit, wherein said power factor compensation is identical with the interior pressure of capacitor in being installed on above-mentioned DC Link portion with the interior pressure of capacitor.
Via as can be known above-mentioned, the present invention relates to a kind of air conditioner frequency conversion control circuit, comprise the input that is connected to DC Link portion in its structure, be used for reducing the power factor compensation portion of the phasic difference between the voltage and current at the input power supply that inputs to compressor electric motor.Utilize the present invention, can shorten that charging current inputs to above-mentioned power factor compensation portion and to time of compressor input current and can make the more approaching sine wave of current waveform of compressor input power supply, thereby improve the stability of the input power supply that inputs to the above-mentioned compressor motor and the phasic difference between the minimizing voltage and current in above-mentioned input power supply, with this power factor that increases effective power and improve above-mentioned air-conditioning.
By technique scheme, air conditioner frequency conversion control circuit of the present invention has following advantage at least:
Air conditioner frequency conversion control circuit of the present invention, have the power factor compensation portion of more than one power factor compensation by installation with capacitor, make charging current can not be directly inputted into the DC connecting portion and electric current is inputed in the above-mentioned power factor compensation portion, therefore can shorten the time required when the compressor input current and can make the current waveform of compressor input power supply approaching sinusoidal wave, thereby improve the stability of the input power supply input to the above-mentioned compressor motor and reduce phasic difference between above-mentioned input power source voltage and the electric current, with this power factor that increases active power and improve above-mentioned air-conditioning.
In sum, the air conditioner frequency conversion control circuit of novelty of the present invention, have above-mentioned plurality of advantages and practical value, it all has bigger improvement on product function, obvious improvement is arranged technically, and has produced handy and practical effect, and more existing air-conditioning has the effect of enhancement, thereby being suitable for practicality more, and having the extensive value of industry, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 carries out illustrated chart to supply voltage, the current waveform that inputs to based on the compressor of air conditioner of prior art;
Fig. 2 carries out illustrated structure chart to the structure that is suitable for air conditioner frequency conversion control circuit of the present invention;
Fig. 3 carries out illustrated chart to supply voltage, the current waveform of exporting from be suitable for air-conditioning frequency changer circuit of the present invention.
10: power supply unit 20: electromagnetic switch
30: bridge part 40: power factor compensation portion
50: reactance coil (Reactor) 60:DC Link portion
70: frequency conversion portion 80: motor
D1: phasic difference LI1: current waveform
LV1: voltage waveform
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of air conditioner frequency conversion control circuit, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
The object of the present invention is achieved like this: a kind of air conditioner frequency conversion control circuit is characterized in that: comprise the DC Link portion that capacitor is installed; AC power is converted to the converter section of DC power supply; DC power supply is converted to the frequency conversion portion that is used for the alternating voltage that compressor electric motor is driven and supplies; Be connected to the input of above-mentioned DC Link portion, in the input power supply that is supplied to the above-mentioned compressor motor by above-mentioned frequency conversion portion, reduce the power factor compensation portion of the phasic difference between the voltage and current.
Below, be described in detail being suitable for embodiments of the invention in conjunction with the accompanying drawings.Seeing also shown in Figure 2ly, is that the structure that is suitable for air conditioner frequency conversion control circuit of the present invention is carried out illustrated structure chart.
Be suitable for air conditioner frequency conversion control circuit of the present invention as shown in Figure 1, comprise power supply unit 10 to above-mentioned air-conditioning power supply; The power supply that inputs to above-mentioned power supply unit 10 is carried out the electromagnetic switch portion 20 of switch; To the converter section of changing from the power supply of above-mentioned power supply unit 10 supplies (not marking the figure); DC power supply is converted to the frequency conversion portion 70 of specific voltage or frequency; Carry out compressor driven motor 80 by power supply by 70 supplies of above-mentioned frequency conversion portion.
In addition, above-mentioned air conditioner frequency conversion control circuit also comprises and is connected to above-mentioned converter section, the power factor compensation portion 40 that receives charging current and the voltage waveform in the above-mentioned frequency conversion portion 70 and the phasic difference between the current waveform are compensated; The microprocessor (not marking among the figure) that above-mentioned air-conditioning is driven and above-mentioned converter section and frequency conversion portion 30,70 are controlled.
Above-mentioned converter section 30 is used for the AC power of above-mentioned power supply unit 10 supplies is converted to DC power supply.Wherein, above-mentioned converter section comprises the bridge part 30 that the power supply of being imported is carried out rectification; The reactance coil (Reactor, 50) that the electric current that flows through is limited; DC Link portion 60.
At this moment, above-mentioned bridge part 30 comprises the bridge diode that is used for the AC power of above-mentioned power supply unit 10 is carried out rectification, and above-mentioned reactance coil 50 will show the reactance (Reactance) of handling the supply voltage of back output through above-mentioned rectification.Wherein, above-mentioned reactance coil 50 is used for the electric current from the DC power supply of above-mentioned converter section 30 outputs is limited.
Above-mentioned DC Link portion 60 comprises more than one capacitor C3, and C4 is used for DC power supply that above-mentioned compressor is driven by receiving from the power supply after over commutation is handled of bridge part 30 outputs, generating.
At this moment, above-mentioned DC Link portion 60 will receive from the DC power supply of above-mentioned bridge part 30 outputs and to above-mentioned capacitor C3, and C4 charges.Wherein, when the supply voltage that inputs to above-mentioned DC Link portion 60 greater than inputing to above-mentioned capacitor C3, during voltage among the C4, electric current will flow through above-mentioned frequency conversion portion 70.
The rear end that above-mentioned power factor compensation portion 40 is connected to above-mentioned bridge part 30 is an output, and is connected to the input of above-mentioned DC Link portion 60, receives the electric current by above-mentioned bridge part 30 conversion back outputs.
Especially by utilizing aforesaid mode that above-mentioned power factor compensation portion 40 is connected between the input of the output of above-mentioned bridge part 30 and above-mentioned DC Link portion 60, make it before charging current inputs to above-mentioned DC Link portion, receive and charge from the electric current of above-mentioned bridge part 30 outputs.
Wherein, above-mentioned power factor compensation portion 40 comprises more than one capacitor C1, C2, and before charging current is input to above-mentioned DC Link portion 60, electric current will be input to above-mentioned capacitor C1, and C2 also charges.
At this moment, above-mentioned capacitor C1, C2 is meant the power factor compensation capacitor.Above-mentioned power factor compensation electricity consumption container C 1, C2 is connected to above-mentioned bridge part 30, is connected to above-mentioned reactance coil 50 and above-mentioned DC Link portion 60 simultaneously.
At this moment, be installed on the power factor compensation electricity consumption container C 1 in the above-mentioned power factor compensation portion 40, the capacity of C2 is the capacitor C3 that is installed in the above-mentioned DC Link portion, and 1/10th of the capacity of C4 is advisable.Simultaneously, above-mentioned power factor compensation electricity consumption container C 1, the capacitor C3 of the interior pressure of C2 and above-mentioned DC Link portion, C4 is identical to be advisable.
Simultaneously, above-mentioned frequency conversion portion 70 comprises more than one switch element, according to from the control signal of above-mentioned microprocessor output above-mentioned switch element being carried out switch ON/OFF, thereby by AC power is inputed in the above-mentioned compressor motor 80 it is driven.
Above-mentioned microprocessor is controlled the data of input and output and according to the order of input the operation of above-mentioned air-conditioning is controlled, carry out AC-DC or DC-AC conversion by the power supply that control signal is inputed to 70 pairs of supplies of above-mentioned converter section and frequency conversion portion simultaneously, and the power supply after the conversion is provided in the above-mentioned compressor motor, thereby the operation of above-mentioned air-conditioning is controlled.
Especially above-mentioned microprocessor can make the power supply that is converted to a certain size voltage or frequency be supplied to above-mentioned compressor motor 80 from above-mentioned frequency conversion portion 70, thereby the driving of above-mentioned compressor is controlled.
At this moment, by utilizing aforesaid mode that above-mentioned power factor compensation portion 40 is connected between above-mentioned bridge part 30 and the above-mentioned DC Link portion 60, can be input in the charging current behind over commutation it is inputed to the above-mentioned power factor compensation portion 40 from 30 outputs of above-mentioned bridge part, thus make by above-mentioned frequency conversion portion 70 to time of above-mentioned compressor electric motor 80 input currents in advance.
To the mode of above-mentioned DC Link portion input charging current, above-mentioned power factor compensation portion 40 can make the current waveform that inputs in the above-mentioned compressor motor 80 more approach sinusoidal wave form, thereby more stable electric current is provided with respect to directly.
Above-mentioned power factor compensation portion 40 is by utilizing said method to shift to an earlier date the time of input current, input to the phasic difference that reduces in the AC power of above-mentioned compressor motor 80 between current waveform and the voltage waveform by above-mentioned frequency conversion portion 70 again, thereby improve its power factor.
Wherein, the power supply that is supplied to the above-mentioned compressor motor from the above-mentioned air conditioner frequency conversion control circuit of structure as mentioned above is as described below.Fig. 3 carries out illustrated chart to supply voltage, the current waveform of exporting from be suitable for air-conditioning frequency changer circuit of the present invention.
As shown in Figure 3, be output and make its received current by the rear end that above-mentioned power factor compensation portion 40 is connected to the bridge part 30 in the above-mentioned converter section, can with respect to directly to the mode of above-mentioned DC Link portion 60 input currents in advance to time of above-mentioned compressor electric motor 80 input currents.
Therefore in the power supply in inputing to the above-mentioned compressor motor, the phasic difference D1 between voltage waveform LV1 and the current waveform LI1 will be less than illustrated phasic difference D among the Fig. 1 based on prior art.
Wherein, the effect factor of above-mentioned air-conditioning is meant the apparent power in institute's power supply and the ratio of effective power, and the size of above-mentioned effective power then changes according to the electric current on voltage and the equidirectional (electric current xCOS (theta)) composition.
Therefore utilize the air conditioner frequency conversion control circuit of structure as mentioned above, can improve effective power by the phasic difference that reduces between electric current and the voltage, thereby improve its power factor.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (4)
1, a kind of air conditioner frequency conversion control circuit is characterized in that it comprises:
The DC Link portion that comprises capacitor is installed;
AC power is converted to the converter section of DC power supply;
DC power supply is converted to the frequency conversion portion that is used for the alternating voltage that compressor electric motor is driven and supplies; And
Be connected to the input of above-mentioned DC Link portion, in the input power supply that is supplied to the above-mentioned compressor motor by above-mentioned frequency conversion portion, reduce the power factor compensation portion of the phasic difference between the voltage and current.
2, a kind of air conditioner frequency conversion control circuit according to claim 1 is characterized in that wherein said power factor compensation portion comprises more than one power factor compensation capacitor.
3, a kind of air conditioner frequency conversion control circuit according to claim 2, it is characterized in that wherein said power factor compensation capacitor volume be installed on above-mentioned DC Link portion condenser capacity 1/10th.
4, a kind of air conditioner frequency conversion control circuit according to claim 2 is characterized in that wherein said power factor compensation is identical with the interior pressure of capacitor in being installed on above-mentioned DC Link portion with the interior pressure of capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610086729 CN101090255A (en) | 2006-06-16 | 2006-06-16 | Air conditioner frequency conversion control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610086729 CN101090255A (en) | 2006-06-16 | 2006-06-16 | Air conditioner frequency conversion control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN101090255A true CN101090255A (en) | 2007-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610086729 Pending CN101090255A (en) | 2006-06-16 | 2006-06-16 | Air conditioner frequency conversion control circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777829A (en) * | 2010-03-09 | 2010-07-14 | 上海大学 | APFC control method of frequency conversion air conditioner under low-frequency model |
| CN103423138A (en) * | 2012-04-17 | 2013-12-04 | 苏州徕卡节能电气技术有限公司 | Energy-saving intelligent control device of air compressor |
| CN109374963A (en) * | 2018-09-30 | 2019-02-22 | 四川长虹空调有限公司 | A kind of air-conditioning voltameter calculation method |
| CN109889060A (en) * | 2018-10-09 | 2019-06-14 | 南京博兰得电能技术发展有限公司 | The AC-DC isolated converter of high power density |
-
2006
- 2006-06-16 CN CN 200610086729 patent/CN101090255A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777829A (en) * | 2010-03-09 | 2010-07-14 | 上海大学 | APFC control method of frequency conversion air conditioner under low-frequency model |
| CN101777829B (en) * | 2010-03-09 | 2012-11-07 | 上海大学 | APFC control method of frequency conversion air conditioner under low-frequency model |
| CN103423138A (en) * | 2012-04-17 | 2013-12-04 | 苏州徕卡节能电气技术有限公司 | Energy-saving intelligent control device of air compressor |
| CN109374963A (en) * | 2018-09-30 | 2019-02-22 | 四川长虹空调有限公司 | A kind of air-conditioning voltameter calculation method |
| CN109889060A (en) * | 2018-10-09 | 2019-06-14 | 南京博兰得电能技术发展有限公司 | The AC-DC isolated converter of high power density |
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