CN101902135B - Three-phase four-wire switching power supply with high zero-line judgment efficiency - Google Patents
Three-phase four-wire switching power supply with high zero-line judgment efficiency Download PDFInfo
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Abstract
The invention discloses a three-phase four-wire switching power supply with zero-line judgment, wherein a high-frequency filter anti-interference circuit is connected with a switching voltage stabilizing power circuit; a zero-line judging circuit and a voltage-stabilizing circuit with a circuit gating function are arranged between a rectifying circuit and the high-frequency filteranti-interference circuit; the rectifying circuit is respectively connected with the input end of the zero-line judging circuit and the input end of the voltage-stabilizing circuit with the circuit gating function; the output end of the zero-line judging circuit and the output end of the voltage-stabilizing circuit with the circuit gating function are switched in the high-frequency filter anti-interference circuit; and the control signal output end of the zero-line judging circuit is connected with the voltage-stabilizing circuit with the circuit gating function. The three-phase four-wire switching power supply of the invention can ensure that the switching power supply can work in the case of no zero line and prevent the switching power supply from being damaged in the event that phase dislocation occurs between the zero line and a phase line in the switching power supply, thus enhancing practicability and reliability of the switching power supply, and being beneficial to popularization and application of the three-phase four-wire switching power supply to more electric equipment.
Description
Technical field
The present invention relates to the switch power technology field, be specifically related to a kind of zero line and judge three-phase four-wire switching power supply.
Technical background
The employed power source design of most of in the past electrical appliances is with transformer-supplied.Along with science and technology development, the Switching Power Supply that people begin to consider to use that volume is little, in light weight, efficient is high, self strong interference immunity, output voltage range are wide is as the power source design of electrical appliance.For existing three-phase four-wire switching power supply; Lacking under zero line or the misphase situation; This three-phase four-wire switching power supply has had a strong impact on the normal use of three-phase electrical appliance with cisco unity malfunction, and it is perfect that the scheme of therefore using three-phase four-wire switching power supply to supply power as power consumption equipment also need not continue.
Summary of the invention
Order of the present invention is to above-mentioned technical problem, provides a kind of interference rejection capability strong, and efficient is high, lack under zero line or the misphase situation also can operate as normal zero line judge three-phase four-wire switching power supply.It can be used as power at the power source design of 15W with interior electrical appliance.
For realizing this purpose; A kind of zero line that the present invention designed is judged three-phase four-wire switching power supply; Comprise rectification circuit, High frequency filter anti-jamming circuit and switching power supply circuit; Wherein, The High frequency filter anti-jamming circuit connects the switching power supply circuit, between said rectification circuit and High frequency filter anti-jamming circuit, is provided with the voltage stabilizing circuit of zero line decision circuitry and band circuit gating function, and said rectification circuit connects the input of zero line decision circuitry and the input of the voltage stabilizing circuit of band circuit gating function respectively; The output of said zero line decision circuitry all inserts the High frequency filter anti-jamming circuit with the output of the voltage stabilizing circuit of band circuit gating function; The voltage stabilizing circuit of the control signal output ends connecting band circuit gating function of said zero line decision circuitry, the control signal of said zero line decision circuitry output get into the voltage stabilizing circuit of band circuit gating function, are used to control the voltage stabilizing circuit of band circuit gating function and the break-make between the High frequency filter anti-jamming circuit.
The voltage stabilizing circuit of said band circuit gating function also is connected with the zero line testing circuit.
Said rectification circuit also is connected with protective circuit of switch power source.
Said zero line decision circuitry comprises diode D13, resistance R 12～R15, capacitor C 5, FET Q2, transient suppressor Z1; Wherein, The grid of FET Q2 connects an end of resistance R 14, and the other end of resistance R 14 inserts zero line JN1 through the resistance R 12～R13 and the diode D13 of series connection, connects capacitor C 5 between FET Q2 source class and the grid; The two ends of capacitor C 5 connect resistance R 15; FET Q2 source class also connects rectification circuit, connects transient suppressor Z1 between the source class of FET Q2 and the drain electrode, and the voltage stabilizing circuit of connecting band circuit gating function is gone back in the drain electrode of FET Q2.
The voltage stabilizing circuit of said band circuit gating function comprises resistance R 4～R9, FET Q1, capacitor C 9, diode D17 and transient suppressor Z2; Wherein, The drain electrode of FET Q1 connects rectification circuit through resistance R 4; Connect resistance R 9 between the drain electrode of the grid of FET Q1 and FET Q2, series resistance R5～R8 between the drain electrode of rectification circuit and FET Q2 connects transient suppressor Z2 between the source class of FET Q1 and the grid; Capacitor C 9 connects the two ends of transient suppressor Z2, and the source class of FET Q1 also connects the High frequency filter anti-jamming circuit.
Said zero line testing circuit comprises voltage stabilizing didoe DZ1, resistance R 10～R11 and photoelectrical coupler OP1; Wherein, The negative pole of voltage stabilizing didoe DZ1 is connected in the source class of FET Q1; The positive pole of voltage stabilizing didoe DZ1 connects the High frequency filter anti-jamming circuit, and the input of photoelectrical coupler OP1 is through the two ends of resistance R 10～R11 access voltage stabilizing didoe DZ1, and the output JI of photoelectrical coupler OP1 is used to connect single-chip microcomputer.
Said rectification circuit comprises diode D1～D12, diode D14～D15, and wherein, the negative pole of diode D1 connects the first phase line JA1; The negative pole of diode D4 connects the positive pole of D1; The negative pole of diode D2 connects the second phase line JB1, and the negative pole of diode D6 connects the positive pole of D2, and the negative pole of diode D3 connects third phase line JC1; The negative pole of diode D5 connects the positive pole of D3, the positive pole of the cathode connecting diode D6 of diode D4～D5; The negative pole of the anodal diode D1 of diode D7; The negative pole of the cathode connecting diode D7 of diode D10, the negative pole of the cathode connecting diode D2 of diode D8, the negative pole of the cathode connecting diode D8 of diode D11; The negative pole of the cathode connecting diode D3 of diode D9; The negative pole of the cathode connecting diode D9 of diode D12, the negative pole of diode D10～D12 connects the positive pole of diode D6, and the negative pole of diode D14 links to each other with the positive pole of diode D15; The positive pole of diode D14 connects zero line JN1, and the negative pole of diode D15 connects the High frequency filter anti-jamming circuit.
Said protective circuit of switch power source comprises wire-wound resistor R1～R3 and piezo-resistance ZR1～ZR4, composite thermistor RT1, diode D16～D17; Wherein, Connecting line is around resistance R 1 between the negative pole of diode D1 and the first phase line JA1; Connecting line is around resistance R 2 between the negative pole of diode D2 and the second phase line JB1, and connecting line connects piezo-resistance ZR1 between the negative pole of diode D3 and the third phase line JC1 between resistance R 3, the first phase line JA1 and zero line JN1; Connect piezo-resistance ZR2 between the second phase line JB2 and the zero line JN1; Connect piezo-resistance ZR3 between third phase line JC1 and the zero line JN1, connect piezo-resistance ZR4 between the negative pole of the positive pole of diode D5 and diode D12, connect composite thermistor RT1 between the negative pole of the positive pole of diode D16 and diode D15.The positive pole of diode D17 connects the zero line testing circuit, inserts the input of High frequency filter anti-jamming circuit after the negative pole of diode D16 links to each other with the negative pole of diode D17.
The invention has the advantages that: through the zero line decision circuitry is set in the three-phase four-wire switching power supply circuit; And control gating through the zero line decision circuitry; Make Switching Power Supply also can work in the situation that lacks zero line, simultaneously, because the effect protection switch power supply of composite thermistor is not damaged in misphase; Strengthen the practicality and the reliability of Switching Power Supply, helped three-phase four-wire switching power supply scheme promoting the use of on more power consumption equipments.The present invention also has the advantage that inhibition conducted interference ability is strong, power-efficient is high, low in energy consumption.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description:
A kind of zero line as shown in Figure 1 is judged three-phase four-wire switching power supply; Comprise protective circuit of switch power source, rectification circuit, High frequency filter anti-jamming circuit and switching power supply circuit; Wherein, Protective circuit of switch power source connects rectification circuit; The High frequency filter anti-jamming circuit connects the switching power supply circuit, between rectification circuit and High frequency filter anti-jamming circuit, is provided with the voltage stabilizing circuit of zero line decision circuitry and band circuit gating function, and rectification circuit connects the input of zero line decision circuitry and the input of the voltage stabilizing circuit of band circuit gating function respectively; The output of said zero line decision circuitry all inserts the High frequency filter anti-jamming circuit with the output of the voltage stabilizing circuit of band circuit gating function; The voltage stabilizing circuit of the control signal output ends connecting band circuit gating function of zero line decision circuitry, the control signal of zero line decision circuitry output get into the voltage stabilizing circuit of band circuit gating function, are used to control the voltage stabilizing circuit of band circuit gating function and the break-make between the High frequency filter anti-jamming circuit.The voltage stabilizing circuit of band circuit gating function also is connected with the zero line testing circuit, and the zero line testing circuit is used for the signal whether zero line lacks is passed to single-chip microcomputer, and provides the prompting of disappearance zero line.Protective circuit of switch power source is used for preventing impacts such as lightning surge.
In the technique scheme; The zero line decision circuitry comprises diode D13, resistance R 12～R15, capacitor C 5, FET Q2, transient suppressor Z1, and wherein, the grid of FET Q2 connects an end of resistance R 14; The other end of resistance R 14 inserts zero line JN1 through the resistance R 12～R13 and the diode D13 of series connection; Connect capacitor C 5 between FET Q2 source class and the grid, the two ends of capacitor C 5 connect resistance R 15, and FET Q2 source class also connects rectification circuit; Connect transient suppressor Z1 between the source class of FET Q2 and the drain electrode, the voltage stabilizing circuit of connecting band circuit gating function is gone back in the drain electrode of FET Q2.Transient suppressor Z1 does not work having under the situation of zero line, in the effect that does not have mainly to play under the situation of zero line pressure limiting.
In the technique scheme; The voltage stabilizing circuit of band circuit gating function comprises resistance R 4～R9, FET Q1, capacitor C 9, diode D17 and transient suppressor Z2; Wherein, the drain electrode of FET Q1 connects rectification circuit through resistance R 4, connects resistance R 9 between the drain electrode of the grid of FET Q1 and FET Q2; Series resistance R5～R8 between the drain electrode of rectification circuit and FET Q2; Connect transient suppressor Z2 between the source class of FET Q1 and the grid, capacitor C 9 connects the two ends of transient suppressor Z2, and the source class of FET Q1 also connects the High frequency filter anti-jamming circuit.
In the technique scheme; The zero line testing circuit comprises voltage stabilizing didoe DZ1, resistance R 10～R11 and photoelectrical coupler OP1; Wherein, the negative pole of voltage stabilizing didoe DZ1 is connected in the source class of FET Q1, and the positive pole of voltage stabilizing didoe DZ1 connects the High frequency filter anti-jamming circuit; The input of photoelectrical coupler OP1 is through the two ends of resistance R 10～R11 access voltage stabilizing didoe DZ1, and the output JI of photoelectrical coupler OP1 is used to connect single-chip microcomputer.
In the technique scheme, rectification circuit comprises diode D1～D12, diode D14～D15, wherein; The negative pole of diode D1 connects the first phase line JA1, and the negative pole of diode D4 connects the positive pole of D1, and the negative pole of diode D2 connects the second phase line JB1; The negative pole of diode D6 connects the positive pole of D2; The negative pole of diode D3 connects third phase line JC1, and the negative pole of diode D5 connects the positive pole of D3, the positive pole of the cathode connecting diode D6 of diode D4～D5; The negative pole of the anodal diode D1 of diode D7; The negative pole of the cathode connecting diode D7 of diode D10, the negative pole of the cathode connecting diode D2 of diode D8, the negative pole of the cathode connecting diode D8 of diode D11; The negative pole of the cathode connecting diode D3 of diode D9; The negative pole of the cathode connecting diode D9 of diode D12, the negative pole of diode D10～D12 connects the positive pole of diode D6, and the negative pole of diode D14 links to each other with the positive pole of diode D15; The positive pole of diode D14 connects zero line JN1, and the negative pole of diode D15 connects the High frequency filter anti-jamming circuit.When zero line was arranged, diode D14～D15 and diode D1～D6 formed the half-bridge rectification circuit; When lacking zero line, diode D1～D12 forms full bridge rectifier.
In the technique scheme; Said protective circuit of switch power source comprises wire-wound resistor R1～R3 and piezo-resistance ZR1～ZR4, composite thermistor RT1, diode D16～D17; Wherein, connecting line is around resistance R 1 between the negative pole of diode D1 and the first phase line JA1, and connecting line is around resistance R 2 between the negative pole of diode D2 and the second phase line JB1; Connecting line is around resistance R 3 between the negative pole of diode D3 and the third phase line JC1; Connect piezo-resistance ZR1 between the first phase line JA1 and the zero line JN1, connect piezo-resistance ZR2 between the second phase line JB2 and the zero line JN1, connect piezo-resistance ZR3 between third phase line JC1 and the zero line JN1; Connect piezo-resistance ZR4 between the negative pole of the positive pole of diode D5 and diode D12, connect composite thermistor RT1 between the negative pole of the positive pole of diode D16 and diode D15.The positive pole of diode D17 connects the zero line testing circuit, inserts the input of High frequency filter anti-jamming circuit after the negative pole of diode D16 links to each other with the negative pole of diode D17.Impacts such as voltage jump that produces when protective circuit of switch power source is used for preventing power-on and power-off and lightning surge.When diode D16～D17 can prevent voltage reversal preceding utmost point element is caused damage.
FET Q1 and the preferred metal-oxide-semiconductor field effect transistor of FET Q2.
The operation principle that the present invention lacks the zero line judgement is: when zero line JN1 inserts just often the FET Q2 conducting in the zero line decision circuitry, the drain electrode output LOW voltage of FET Q2; The grid that this low-voltage inserts FET Q1 makes FET Q1 end, and the voltage stabilizing circuit part is not worked, and each phase line forms the half-bridge rectification circuit with zero line JN3 respectively; Be the power consumption equipment power supply; Because of adopting the half-bridge rectification circuit, output voltage is lower, does not need to use in addition the reduction voltage circuit step-down again; Reduce electric energy loss unnecessary in the circuit, improved the utilance of power supply greatly.When zero line lacked, the Q2 in the zero line decision circuitry ended, and the voltage of phase line inserts the grid of the FET Q1 in the reduction voltage circuit; Make FET Q1 conducting to form the higher full bridge rectifier of voltage between each phase line, this moment, FET Q1 was operated in conducting state; Source voltage increases with grid voltage, simultaneously, and when grid voltage is increased to certain value; Transient suppressor Z1 a fixed value, guarantees that the Q1 output voltage can be not too high and damage back utmost point element with voltage clamp, and at this moment Q1 is operated in linear condition; The voltage that surpasses fixed value mainly is added on the Q1; Q1 plays hypotensive effect, makes supplying power for power consumption equipment of output voltage stabilization, guarantees its operate as normal.Photoelectrical coupler OP1 in the zero line testing circuit outputs signal to single-chip microcomputer under the situation of disappearance zero line at this moment, and single-chip microcomputer can be through indicator light or display reminding user zero line this moment disappearance.Power supply inserts the High frequency filter anti-jamming circuit behind the voltage stabilizing circuit of zero line decision circuitry and band circuit gating function, the High frequency filter anti-jamming circuit can effectively suppress conducted interference, guarantees the stability of Switching Power Supply.Pass through the switching power supply circuit at last, obtain the required power supply of power consumption equipment each several part.
When each phase line and zero line generation misphase, the voltage major part that is increased is consumed by compound temperature-sensitive RT1, and the protection switch power supply does not damage because of overtension.
The content that this specification is not done to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (8)
1. a zero line is judged three-phase four-wire switching power supply; Comprise rectification circuit, High frequency filter anti-jamming circuit and switching power supply circuit; Wherein, The High frequency filter anti-jamming circuit connects the switching power supply circuit; It is characterized in that: the voltage stabilizing circuit that between said rectification circuit and High frequency filter anti-jamming circuit, is provided with zero line decision circuitry and band circuit gating function; Said rectification circuit connects the input of zero line decision circuitry and the input of the voltage stabilizing circuit of band circuit gating function respectively, and the output of said zero line decision circuitry all inserts the High frequency filter anti-jamming circuit, the voltage stabilizing circuit of the control signal output ends connecting band circuit gating function of said zero line decision circuitry with the output of the voltage stabilizing circuit of band circuit gating function; The control signal of said zero line decision circuitry output gets into the voltage stabilizing circuit of band circuit gating function, is used to control the voltage stabilizing circuit of band circuit gating function and the break-make between the High frequency filter anti-jamming circuit.
2. zero line according to claim 1 is judged three-phase four-wire switching power supply, and it is characterized in that: the voltage stabilizing circuit of said band circuit gating function also is connected with the zero line testing circuit.
3. zero line according to claim 1 is judged three-phase four-wire switching power supply, and it is characterized in that: said rectification circuit also is connected with protective circuit of switch power source.
4. zero line according to claim 1 is judged three-phase four-wire switching power supply; It is characterized in that: said zero line decision circuitry comprises diode D13, resistance R 12～R15, capacitor C 5, FET Q2, transient suppressor Z1; Wherein, The grid of FET Q2 connects an end of resistance R 14, and the other end of resistance R 14 inserts zero line JN1 through the resistance R 12～R13 and the diode D13 of series connection, connects capacitor C 5 between FET Q2 source electrode and the grid; The two ends of capacitor C 5 connect resistance R 15; FET Q2 source electrode also connects rectification circuit, connects transient suppressor Z1 between the source electrode of FET Q2 and the drain electrode, and the voltage stabilizing circuit of connecting band circuit gating function is gone back in the drain electrode of FET Q2.
5. zero line according to claim 1 is judged three-phase four-wire switching power supply; It is characterized in that: the voltage stabilizing circuit of said band circuit gating function comprises resistance R 4～R9, FET Q1, capacitor C 9, diode D17 and transient suppressor Z2; Wherein, the drain electrode of FET Q1 connects rectification circuit through resistance R 4, connects resistance R 9 between the drain electrode of the grid of FET Q1 and FET Q2; Series resistance R5～R8 between the drain electrode of rectification circuit and FET Q2; Connect transient suppressor Z2 between the source electrode of FET Q1 and the grid, capacitor C 9 connects the two ends of transient suppressor Z2, and the source electrode of FET Q1 also connects the High frequency filter anti-jamming circuit.
6. zero line according to claim 2 is judged three-phase four-wire switching power supply; It is characterized in that: said zero line testing circuit comprises voltage stabilizing didoe DZ1, resistance R 10～R11 and photoelectrical coupler OP1; Wherein, The negative pole of voltage stabilizing didoe DZ1 is connected in the source electrode of FET Q1; The positive pole of voltage stabilizing didoe DZ1 connects the High frequency filter anti-jamming circuit, and the input of photoelectrical coupler OP1 is through the two ends of resistance R 10～R11 access voltage stabilizing didoe DZ1, and the output JI of photoelectrical coupler OP1 is used to connect single-chip microcomputer.
7. zero line according to claim 1 is judged three-phase four-wire switching power supply; It is characterized in that: said rectification circuit comprises diode D1～D12, diode D14～D15, and wherein, the negative pole of diode D1 connects the first phase line JA1; The negative pole of diode D4 connects the positive pole of D1; The negative pole of diode D2 connects the second phase line JB1, and the negative pole of diode D6 connects the positive pole of D2, and the negative pole of diode D3 connects third phase line JC1; The negative pole of diode D5 connects the positive pole of D3, the positive pole of the cathode connecting diode D6 of diode D4～D5; The negative pole of the anodal diode D1 of diode D7; The negative pole of the cathode connecting diode D7 of diode D10, the negative pole of the cathode connecting diode D2 of diode D8, the negative pole of the cathode connecting diode D8 of diode D11; The negative pole of the cathode connecting diode D3 of diode D9; The negative pole of the cathode connecting diode D9 of diode D12, the negative pole of diode D10～D12 connects the positive pole of diode D6, and the negative pole of diode D14 links to each other with the positive pole of diode D15; The positive pole of diode D14 connects zero line JN1, and the negative pole of diode D15 connects the High frequency filter anti-jamming circuit.
8. zero line according to claim 3 is judged three-phase four-wire switching power supply; It is characterized in that: said protective circuit of switch power source comprises wire-wound resistor R1～R3 and piezo-resistance ZR1～ZR4, composite thermistor RT1, diode D16～D17; Wherein, Connecting line is around resistance R 1 between the negative pole of diode D1 and the first phase line JA1; Connecting line is around resistance R 2 between the negative pole of diode D2 and the second phase line JB1, and connecting line connects piezo-resistance ZR1 between the negative pole of diode D3 and the third phase line JC1 between resistance R 3, the first phase line JA1 and zero line JN1; Connect piezo-resistance ZR2 between the second phase line JB2 and the zero line JN1; Connect piezo-resistance ZR3 between third phase line JC1 and the zero line JN1, connect piezo-resistance ZR4 between the negative pole of the positive pole of diode D5 and diode D12, connect composite thermistor RT1 between the negative pole of the positive pole of diode D16 and diode D15; The positive pole of diode D17 connects the zero line testing circuit, inserts the input of High frequency filter anti-jamming circuit after the negative pole of diode D16 links to each other with the negative pole of diode D17.
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| CN102183683B (en) * | 2011-01-24 | 2013-04-10 | 武汉盛帆电子股份有限公司 | Switch power supply-based single-phase low power consumption intelligent electric energy meter |
| CN102175914A (en) * | 2011-01-25 | 2011-09-07 | 武汉盛帆电子股份有限公司 | Three-phase low power consumption control intelligent electric energy meter based on zero line judging switching power supply |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2456350Y (en) * | 2000-12-08 | 2001-10-24 | 中国科学院自动化研究所 | Offline null line protector |
| CN2741248Y (en) * | 2004-10-13 | 2005-11-16 | 天津理工大学 | Zero line breaking preventor of transformer |
| CN201142576Y (en) * | 2007-12-29 | 2008-10-29 | 西安瑞驰电力设备有限公司 | Three-phase four-wire system active filter device for electrolyser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002078323A (en) * | 2000-08-30 | 2002-03-15 | Canon Inc | Power device |
| JP2006180652A (en) * | 2004-12-24 | 2006-07-06 | Matsushita Electric Ind Co Ltd | Direct-current power supply device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2456350Y (en) * | 2000-12-08 | 2001-10-24 | 中国科学院自动化研究所 | Offline null line protector |
| CN2741248Y (en) * | 2004-10-13 | 2005-11-16 | 天津理工大学 | Zero line breaking preventor of transformer |
| CN201142576Y (en) * | 2007-12-29 | 2008-10-29 | 西安瑞驰电力设备有限公司 | Three-phase four-wire system active filter device for electrolyser |
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