CN104821720A - Non-isolated resonant converter for refrigerating device - Google Patents
Non-isolated resonant converter for refrigerating device Download PDFInfo
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- CN104821720A CN104821720A CN201510279127.6A CN201510279127A CN104821720A CN 104821720 A CN104821720 A CN 104821720A CN 201510279127 A CN201510279127 A CN 201510279127A CN 104821720 A CN104821720 A CN 104821720A
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Abstract
The invention discloses a non-isolated resonant converter. A resonant circuit has a one-stage conversion structure. The non-isolated resonant converter comprises an input/output circuit, the resonant circuit and a switch transistor driving circuit. The non-isolated resonant converter has a simple and efficient circuit topology structure. Furthermore a driving circuit is related with an input voltage and an output voltage, thereby switching on and switching off a switch transistor S. The non-isolated resonant converter can effectively restrain an effect caused by fluctuation of an input voltage and an output voltage, and furthermore can be applied on the field of new energies.
Description
[technical field]
The invention belongs to field of conversion of electrical energy, particularly a kind of non-isolated controlled resonant converter for refrigerating plant.
[background technology]
High frequency efficient high power density is the development trend of Switching Power Supply, and controlled resonant converter relies on its Sofe Switch characteristic and good EMI to show, and becomes the focus of new forms of energy transformation of electrical energy technical field research.
By accurately controlling the Switching Power Supply of mobile refrigerating plant, energy resource consumption increase and decrease efficiency can be reduced better;
Controlled resonant converter common at present, all make based on isolated transformer, can coordinate with reference to shown in figure 1, it is the resonant half-bridge converter utilizing isolated transformer to be formed by connecting, specifically, when secondary Same Name of Ends voltage is timing, the electric capacity C that Transformer Winding is connected by secondary and diode D1 powering load, electric capacity C has the effect of lifting pressure; When secondary Same Name of Ends voltage is for time negative, diode D1 ends, diode D2 conducting, charges now to electric capacity C.Because isolated transformer is made up of two windings, cause the volume of controlled resonant converter comparatively large, loss is higher, haves much room for improvement.
[summary of the invention]
Technical problem to be solved by this invention is for the defect in aforementioned background art and deficiency, provides a kind of non-isolated resonant converter for refrigerating plant, and its volume is little, and loss is low, and power density is high.
By pressure sensor monitoring compressor high side pressure, by pressure control device, non-isolated controlled resonant converter is controlled.
Its topological structure is: input power Uin connects one end of input capacitance Cin, the different name end of inductance L 1, the Same Name of Ends of inductance L 1 connects one end of electric capacity C, the other end of electric capacity C connects the Same Name of Ends of inductance L 2 and the anode of diode D, the negative electrode of diode D connects one end of output capacitance Cout, and output voltage; The other end of input capacitance Cin, the other end ground connection of output capacitance Cout, the Same Name of Ends of a termination inductance L 1 of switching tube S, the other end is by resistance R8 ground connection.
The drive circuit concrete structure of switching tube S is relevant with input voltage and output voltage, voltage-stabiliser tube, transistor, resistance, electric capacity is coordinated to carry out active matrix driving, concrete structure is: the negative electrode of voltage-stabiliser tube Z1 connects input voltage, one end of anode contact resistance R1, resistance R2, and electric capacity C1 is in parallel with voltage-stabiliser tube Z1; One end of resistance R3 connects input voltage, and the other end connects the emitter of transistor Q2 and the base stage of transistor Q1; The emitter of transistor Q1 connects input voltage, and transistor Q1 base stage is connected to the base stage of its collector electrode and transistor Q2 by electric capacity C2; One end of transistor Q1 collector electrode contact resistance R5, the other end of resistance R5 is connected to the Same Name of Ends of inductance L 1 by resistance R4; Electric capacity C3 is in parallel with resistance R5; The other end of the base stage contact resistance R1 of transistor Q2; Its collector electrode connects the collector electrode of transistor Q3 and the control pole of switching tube S; The other end of base stage contact resistance R2 of transistor Q3, one end of resistance R6; The other end of resistance R6 connects the anode of voltage-stabiliser tube Z2 and one end of resistance R7, and one end of resistance R7 is connected to the other end of switching tube S; The base stage of transistor Q3 is also connected to one end of electric capacity C4 by resistance R9, the other end of electric capacity C4 is connected to one end of switch S, and wherein transistor Q1, Q2 is PNP transistor, and Q3 is NPN transistor.
Compared with prior art, useful effect of the present invention comprises:
The controlled resonant converter that the present invention proposes, the resonant circuit utilizing inductance, electric capacity to form does energy exchange and uses, its topology only uses primary conversion circuit, overcome the deficiency of conventional resonant circuit, circuit topology simplifies, and the relevant thus turn-on and turn-off of control switch pipe S of drive circuit and input voltage, output voltage, input voltage and output voltage can be effectively suppressed to fluctuate the impact brought, and this topology compared with conventional resonance converter under comparable operating conditions switching device power little, efficiency wants high, and cost is lower.
The present invention is accurately controlled the cooling fluid of compressor is supplementary by controlled resonant converter, liquid measure is cooled according in pressure sensor feedback compressor, suitably maintain refrigerant loop Inner eycle refrigerant amount, prevent the overload of the compressor means caused because of High Abnormal Pressure from operating; Controlling organization is when described high side pressure exceedes the recovery threshold values of regulation, or exceed the recovery protection value of the low regulation of described recovery valve with described high side pressure and the rotating speed described gas cooler being carried out to the air blast of air cooling reaches maximum for condition, perform described refrigerant collection operation, be reduced at described high side pressure and terminate described refrigerant collection operation described recovery protection is worth following and to described cold-producing medium protection act; And; controlling organization is when described high side pressure is lower than the recovery threshold values specified; or become below described recovery protection value with described high side pressure and below the low setting of maximum is become for condition to the rotating speed of described air blast; perform described cold-producing medium and release action; under described high side pressure exceedes described recovery protection value situation, terminate described cold-producing medium release action and to described cold-producing medium protection act; reduce energy loss with this, reduce costs.
[accompanying drawing explanation]
Fig. 1: the circuit connection diagram of existing resonant half-bridge converter;
Fig. 2: the structural representation of non-isolated controlled resonant converter of the present invention.
[embodiment]
For making technical scheme of the present invention clearly, below in conjunction with accompanying drawing and specific implementation process, the present invention is described in further detail.
As shown in Figure 2, non-isolated controlled resonant converter of the present invention comprises input voltage U
in, inductance L 1, electric capacity C, inductance L 2 and switching tube S and drive circuit thereof form, inductance L 1, inductance L 2 are coupled mode inductance.
2 structure of the present invention is elaborated by reference to the accompanying drawings, concrete annexation is: input power Uin Bonding pressure control device, pressure control device connects one end of input capacitance Cin, the different name end of inductance L 1, the Same Name of Ends of inductance L 1 connects one end of electric capacity C, the other end of electric capacity C connects the Same Name of Ends of inductance L 2 and the anode of diode D, the negative electrode of diode D connects one end of output capacitance Cout, and output voltage; The other end of input capacitance Cin, the other end ground connection of output capacitance Cout, the Same Name of Ends of a termination inductance L 1 of switching tube S, the other end is by resistance R8 ground connection.
Pressure control device Bonding pressure transducer, pressure sensor is installed on compressor high pressure side outlet place.
The drive circuit concrete structure of switching tube S is relevant with input voltage and output voltage, voltage-stabiliser tube, transistor, resistance, electric capacity is coordinated to carry out active matrix driving, concrete structure is: the negative electrode of voltage-stabiliser tube Z1 connects input voltage, one end of anode contact resistance R1, resistance R2, and electric capacity C1 is in parallel with voltage-stabiliser tube Z1; One end of resistance R3 connects input voltage, and the other end connects the emitter of transistor Q2 and the base stage of transistor Q1; The emitter of transistor Q1 connects input voltage, and transistor Q1 base stage is connected to the base stage of its collector electrode and transistor Q2 by electric capacity C2; One end of transistor Q1 collector electrode contact resistance R5, the other end of resistance R5 is connected to the Same Name of Ends of inductance L 1 by resistance R4; Electric capacity C3 is in parallel with resistance R5; The other end of the base stage contact resistance R1 of transistor Q2; Its collector electrode connects the collector electrode of transistor Q3 and the control pole of switching tube S; The other end of base stage contact resistance R2 of transistor Q3, one end of resistance R6; The other end of resistance R6 connects the anode of voltage-stabiliser tube Z2 and one end of resistance R7, and one end of resistance R7 is connected to the other end of switching tube S; The base stage of transistor Q3 is also connected to one end of electric capacity C4 by resistance R9, the other end of electric capacity C4 is connected to one end of switch S, and wherein transistor Q1, Q2 is PNP transistor, and Q3 is NPN transistor.By above-mentioned drive circuit, by the turn-on and turn-off of transistor Q1, Q2, Q3 and peripheral circuit control switch pipe S thereof, when switch S conducting time, inductance L 1 energy storage, electric capacity C and inductance L 2 release energy, when switch S turns off time, inductance L 1, electric capacity C, inductance L 2 form resonant circuit, when the resonance current flowing through diode D becomes 0, the conducting again of control switch pipe, forms periodic turn-on and turn-off.
Switching tube S is MOSFET or IGBT constant power semiconductor device.
Input power is storage battery, fuel cell or photovoltaic cell etc.
This resonant circuit adopts one-stage transfor-mation structure, and circuit topological structure is simply efficient; And the relevant thus turn-on and turn-off of control switch pipe S of drive circuit and input voltage, output voltage, input voltage and output voltage effectively can be suppressed to fluctuate the impact brought, increase control precision.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. the non-isolated controlled resonant converter for refrigerating plant, it is characterized in that: input power Uin Bonding pressure control device, pressure control device connects one end of input capacitance Cin, the different name end of inductance L 1, the Same Name of Ends of inductance L 1 connects one end of electric capacity C, the other end of electric capacity C connects the Same Name of Ends of inductance L 2 and the anode of diode D, the negative electrode of diode D connects one end of output capacitance Cout, and output voltage; The other end of input capacitance Cin, the other end ground connection of output capacitance Cout, the Same Name of Ends of a termination inductance L 1 of switching tube S, the other end is by resistance R8 ground connection; The drive circuit of switching tube S is relevant with input voltage and output voltage, voltage-stabiliser tube, transistor, resistance, electric capacity is coordinated to carry out active matrix driving, concrete structure is: the negative electrode of voltage-stabiliser tube Z1 connects input voltage, one end of anode contact resistance R1, resistance R2, and electric capacity C1 is in parallel with voltage-stabiliser tube Z1; One end of resistance R3 connects input voltage, and the other end connects the emitter of transistor Q2 and the base stage of transistor Q1; The emitter of transistor Q1 connects input voltage, and transistor Q1 base stage is connected to the base stage of its collector electrode and transistor Q2 by electric capacity C2; One end of transistor Q1 collector electrode contact resistance R5, the other end of resistance R5 is connected to the Same Name of Ends of inductance L 1 by resistance R4; Electric capacity C3 is in parallel with resistance R5; The other end of the base stage contact resistance R1 of transistor Q2; Its collector electrode connects the collector electrode of transistor Q3 and the control pole of switching tube S; The other end of base stage contact resistance R2 of transistor Q3, one end of resistance R6; The other end of resistance R6 connects the anode of voltage-stabiliser tube Z2 and one end of resistance R7, and one end of resistance R7 is connected to the other end of switching tube S; The base stage of transistor Q3 is also connected to one end of electric capacity C4 by resistance R9, the other end of electric capacity C4 is connected to one end of switching tube S, and wherein transistor Q1, Q2 is PNP transistor, and Q3 is NPN transistor.
2. non-isolated controlled resonant converter according to claim 1, is characterized in that: described inductance L 1, inductance L 2 are coupled mode inductance.
3. non-isolated controlled resonant converter according to claim 1, is characterized in that: described switching tube S is IGBT or MOSFET.
4. non-isolated controlled resonant converter according to claim 1, is characterized in that: described input voltage is storage battery, fuel cell or photovoltaic cell.
5. non-isolated controlled resonant converter according to claim 1, is characterized in that: described pressure control device Bonding pressure transducer.
6. non-isolated controlled resonant converter according to claim 5, is characterized in that: described pressure sensor is installed on the compressor high pressure side outlet place of refrigerating plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510279127.6A CN104821720A (en) | 2014-12-13 | 2015-05-27 | Non-isolated resonant converter for refrigerating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410806105 | 2014-12-13 | ||
| CN2014108061056 | 2014-12-13 | ||
| CN201510279127.6A CN104821720A (en) | 2014-12-13 | 2015-05-27 | Non-isolated resonant converter for refrigerating device |
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| CN104821720A true CN104821720A (en) | 2015-08-05 |
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| CN201510279127.6A Pending CN104821720A (en) | 2014-12-13 | 2015-05-27 | Non-isolated resonant converter for refrigerating device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102105756A (en) * | 2008-07-25 | 2011-06-22 | 开利公司 | Continuous compressor envelope protection |
| CN103856050A (en) * | 2012-12-04 | 2014-06-11 | 欧司朗股份有限公司 | Converter circuit |
-
2015
- 2015-05-27 CN CN201510279127.6A patent/CN104821720A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102105756A (en) * | 2008-07-25 | 2011-06-22 | 开利公司 | Continuous compressor envelope protection |
| CN103856050A (en) * | 2012-12-04 | 2014-06-11 | 欧司朗股份有限公司 | Converter circuit |
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Application publication date: 20150805 |