CN2224434Y - Voltage-current stabilizer - Google Patents
Voltage-current stabilizer Download PDFInfo
- Publication number
- CN2224434Y CN2224434Y CN 94218358 CN94218358U CN2224434Y CN 2224434 Y CN2224434 Y CN 2224434Y CN 94218358 CN94218358 CN 94218358 CN 94218358 U CN94218358 U CN 94218358U CN 2224434 Y CN2224434 Y CN 2224434Y
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- voltage
- inverter
- rectifier
- utility
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Abstract
The utility model discloses a voltage and frequency stabilizer, which comprises a rectifier, an inverter and an accumulator unit. The utility model is characterized in that the live wire (HOT) of a mains supply is connected with the first input end of the rectifier by a relay, the O wire (NEUTRAL) of the mains supply is connected with a second input end by the rectifier, the O wire end of a pair of output ends of a full bridge form inverter is directly connected with the second input of the rectifier, and namely, the O wire end of a pair of output ends of a full bridge form inverter is connected with th O wire end of the mains supply. The utility model removes a traditional isolation transformer, and therefore, the utility model has the advantages of small size, high efficiency and low cost and has the characteristics of voltage stabilization, frequency stabilization, strong anti-interference ability and uninterrupted supply. The utility model is an ideal industrial frequency power supply for various electronic equipment.
Description
The utility model belongs to power technique fields, specifically a kind of voltage stabilization and frequency stabilization device.
The voltage stabilization and frequency stabilization device is pressed head word, has another name called to be CVCF, and it has voltage stabilizing, frequency stabilization, anti-interference, continual supplied character, is desirable power frequency (50HZ or the 60HZ) power supplys of various electronic equipments such as computing machine.
Existing voltage stabilization and frequency stabilization device, usually by rectifier, inverter and control module thereof and secondary battery unit constitute.Rectifier converts the alternating voltage of civil power to DC voltage, and inverter then converts this DC voltage to the alternating voltage of voltage stabilization and frequency stabilization, supply load.Civil power in the voltage stabilization and frequency stabilization device, has lost the isopotential point of civil power 0 line (NEUTRAL) after rectification, the pair of output that is added in the load is all charged, and this is unallowed, for this reason, need between the output terminal of mains electricity input end and voltage stabilization and frequency stabilization device, add isolating transformer.Isolating transformer belongs to a kind of power transformer, and it increases the cost of voltage stabilization and frequency stabilization device, the efficient step-down, and complex process, volume weight increases.
The purpose of this utility model is, design a kind of simple in structure, in light weight, voltage stabilization and frequency stabilization device that cost is low, safe and reliable, it need not the power transformer of traditional voltage stabilization and frequency stabilization device, but guarantee 0 line of voltage stabilization and frequency stabilization device to the load output terminal, with input end 0 line of civil power, keep equipotential forever to the voltage stabilization and frequency stabilization device.
The purpose of this utility model realizes by following design proposal, comprise rectifier, secondary battery unit, inverter and control module, the full-bridge type inverter that inverter is made up of four electronic switches, an its interchange end links as the live wire output terminal through an end of an inductance and an electric capacity, another other end that exchanges end and electric capacity links as the zero line output terminal, an input end that it is characterized in that said rectifier is linked by the relay contact of the control of the phase place prosecution device in control module break-make and the live wire of civil power as live wire end process, and its another input end links as the zero line of zero line and civil power and the zero line of inverter output end.When civil power just often, relay is connected civil power, the sinusoidal voltage Phase Tracking civil power phase place of voltage stabilization and frequency stabilization device output.During the city electrical anomaly, this relay disconnects the mains electricity input end, and the voltage stabilization and frequency stabilization device is exported the sinusoidal voltage of this machine natural frequency.
The utility model is simple in structure, and the inactivity transformer makes the voltage stabilization and frequency stabilization device make a great stride forward to small-sized light weight, energy-efficient, low-cost, low noise, high reliability direction.
The utility model has following accompanying drawing:
Fig. 1 voltage stabilization and frequency stabilization device principle schematic
The another kind of voltage stabilization and frequency stabilization device of Fig. 2 principle schematic
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the schematic diagram of voltage stabilization and frequency stabilization device, and dashed rectangle 23 is a rectifier, comprises D1, D2, D3, D4 rectifying device; 24 is inverter, comprises electronic switch S1, S2, S3, S4, inductance L
F, capacitor C
F, 26 is control module: 25 are secondary battery unit, comprise that battery pack B, diode D5, inductance L B, electricity are in switch S 5 and control module 27.
The first input end 1 of above-mentioned rectifier is connected with civil power live wire (HOT) through relay R L, second input end 2 is connected with civil power 0 line (NEUTRAL), and being connected on 0 line end of described voltage stabilization and frequency stabilization device pair of output, so that these two 0 eternal equipotentials of line.Two output terminals of rectifier are connected across on the positive and negative electrode of filter capacitor C.
Electronic switch S1, the S2 of above-mentioned inverter, S3, S4 constitute the full-bridge form, are connected across on the positive and negative electrode of above-mentioned filter capacitor C, are operated in the pulse switch state.The pulse width of its conducting, when civil power just often, be that this makes the output voltage Phase Tracking civil power of voltage stabilization and frequency stabilization device by the sinusoidal wave rule modulation of following the tracks of civil power; During the city electrical anomaly, then by the sinusoidal wave rule modulation of this machine natural frequency.The common point 5 of electronic switch S1, S2 is through an inductance or directly be connected on the 0 line end NEUTRAL of above-mentioned pair of output; The common point 6 of electronic switch S3, S4 is through inductance L
FConnect on the live wire HOT of above-mentioned pair of output capacitor C
FBe connected on the above-mentioned pair of output.Inductance L
F, capacitor C
FThe filtering circuit of forming inverter, as above-mentioned electronic switch S2, when S3 connected break-make by the Sine Modulated rule, the DC voltage VDC on the above-mentioned filter capacitor C was just cut into widened pulse, is added in L continuously
F, C
FOn, after filtering, on the above-mentioned pair of output, just obtain the positive half cycle of sinusoidal voltage, otherwise, when electronic switch S1, S4 press the continuous break-make of Sine Modulated rule, on the above-mentioned pair of output, just obtain negative half period.
The control module 26 of above-mentioned inverter, the break-make of control electronic switch S1, S2, S3, S4, it comprises:
Phase place prosecution device 11, oscillator divider 12 are used for phase-locking.When civil power just often, phase place prosecution device 11 is pressed this machine phase impulse of civil power phase correction oscillator divider 12 output, makes it to follow the tracks of civil power, and with relay R L closure, connects civil power; When city's electrical anomaly, relay R L is disconnected, oscillator divider 12 has hunting of frequency by week, this machine phase impulse of output natural frequency.
Sine-wave generator 13, triangular-wave generator 14, pulse width modulator 15 constitute variable duration impulse system.The sine wave phase of sine-wave generator 13 outputs is controlled by this machine phase impulse that oscillator divider 12 is exported, and civil power is just often followed the tracks of the civil power phase place.Pulse width modulator 15 compares this sine wave with the triangular wave from triangular-wave generator 14, just obtain one by the wide pulse train of civil power sinusoidal phase rule accent.
Complementary drive circuit 16 receives the widened pulse that above-mentioned pulse width modulator 15 produces, and produces four complementary in twos drive signals, controls electronic switch S1, the S2 of above-mentioned inverter and S3, S4 transfer wide rule by above-mentioned sine pulse condition break-make respectively.
Voltage-level detector 17, be used to detect the magnitude of voltage on the above-mentioned pair of output, and magnitude of voltage according to this, change the output pulse width of pulse width modulator 15 by the sinusoidal wave level that moves above-mentioned sine-wave generator 13 outputs, so, the pulse conducting width of electronic switch S1, the S2 of inverter, S3, S4 also changes thereupon, and the output voltage that obtains on above-mentioned pair of output also and then changes.This is born and returns the feedback process, guarantees that the voltage on the above-mentioned pair of output is stabilized in the given range.
The diode D5 of above-mentioned secondary battery unit, electronic switch S5 and inductance L B constitute the inductive type voltage lifting circuit, and electronic switch S5 is operated in the pulse on off operating mode when city's electrical anomaly.When the S5 conducting, the voltage of battery pack B almost is added on the inductance L B entirely, and the electric current among the LB is linear in time and rises, and its power storage and the current value that flows through LB square are directly proportional.When electronic switch S5 turn-offed, the energy that stores among the LB through diode D5, discharged and gives above-mentioned capacitor C, finishes voltage and promotes.The length of electronic switch S5 pulse ON time, the magnitude of voltage after having determined to promote.
The control module 27 of above-mentioned secondary battery unit, the break-make of control electronic switch S5, it comprises:
Resistance R 1, R2 constitutes voltage divider, is connected across on the positive and negative electrode of above-mentioned capacitor C, and the magnitude of voltage on the R2 is directly proportional with magnitude of voltage VDC on the capacitor C.Error amplifier 19 carries out the difference of the voltage on the R2 with given reference voltage VREF difference and amplifies.
18 triangular waves that provide take place the differential signal of above-mentioned error amplifier 19 outputs with triangular wave and compare in pulse width modulator 20, produce widened pulse, and the control that is added to electronic switch S5 is extremely gone up, the break-make of control S5.When the DC voltage after promoting departs from set-point, the differential signal of error amplifier 19 outputs changes thereupon, the pulsewidth of pulse width modulator 20 outputs also and then changes, and electricity also and then changes in the pulse ON time of switch S 5, so the dc voltage value that is raised is corrected in given range.
Because the utility model inactivity transformer, this makes above-mentioned electronic switch S1, S2, S3, S4, S5 according to different situations, circuit is only done a few modifications or variation, just can select different electronic switching devices for use, as bipolar transistor, MOS-FET device, insulated gate bipolar transistor IGBT device.
Fig. 2 provides a kind of embodiment of employing MOS-FET device.Electronic switch S1, S2, S3, S4, S5, S6 are withstand voltage MOS greater than 500V-FET pipe.SW1, SW2 are two hand switches, are respectively applied for input of control civil power and inverter start and stop.TH is a thermoswitch, when described voltage stabilization and frequency stabilization device internal temperature surpasses 90 ℃, inverter is turn-offed.VS1 is a surge absorber, prevents that thunder and lightning or other high voltage transient from entering.NF is noise filter, filters various Radio frequency interference (RFI) together with capacitor C 1, C2.Transformer T1, T2, T3 are respectively applied for and detect civil power phase place, voltage stabilization and frequency stabilization device output voltage values, output current value, make Phase Tracking for inverter control circuit C1, and overvoltage protection and overload protection are used.
The S6 of Fig. 2 uses electronic switch for charging, civil power just often, S6 is in the pulse on off operating mode, by inductance L B, B charges to battery pack.R3 is the very little flow measurement resistance of resistance, and the pressure drop on the R3 is directly proportional with charging current value; According to the feedback signal that returns of pressure drop on the R3 and battery pack B anode, the pulse ON time of the control circuit CB of secondary battery unit control electronic switch S6, thereby control charging current value and charging voltage value.
The reverse protection diode that includes of electronic switch S5, the inductance L B of Fig. 2, electronic switch S6 constitutes above-mentioned inductive type voltage lifting circuit.When city's electrical anomaly, this lifting circuit rises to predetermined value with battery tension.According to the voltage on the divider resistance R2, the control circuit CB of battery system, the break-make of control electronic switch S5 is adjusted the magnitude of voltage after promoting.
Claims (1)
1, a kind of voltage stabilization and frequency stabilization device, comprise rectifier (23), secondary battery unit (25), inverter (24) and control module (26), inverter (24) is by electronic switch S1, S2, S3, S4, the full-bridge inverter formed, and its one exchanges end (6) through inductance L
FWith capacitor C
FAn end link as live wire output terminal HOT, another other end that exchanges end (5) and capacitor C F links, as zero line output terminal NEUTRAL, an input end (1) that it is characterized in that said rectifier (23) is linked by the relay contact RL of the control of the phase place prosecution device (11) in the control module (26) break-make and the live wire (HOT) of civil power as live wire end process, and its another case is gone into end (2) and linked as the zero line (NEUTRAL) of zero line side and civil power and the zero line (NEUTRAL) of inverter (24) output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94218358 CN2224434Y (en) | 1994-08-12 | 1994-08-12 | Voltage-current stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94218358 CN2224434Y (en) | 1994-08-12 | 1994-08-12 | Voltage-current stabilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2224434Y true CN2224434Y (en) | 1996-04-10 |
Family
ID=33833542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94218358 Expired - Fee Related CN2224434Y (en) | 1994-08-12 | 1994-08-12 | Voltage-current stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2224434Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423688C (en) * | 2005-10-19 | 2008-10-08 | 深圳迈瑞生物医疗电子股份有限公司 | Method and apparatus for inhibiting power frequency common-mode interference |
-
1994
- 1994-08-12 CN CN 94218358 patent/CN2224434Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423688C (en) * | 2005-10-19 | 2008-10-08 | 深圳迈瑞生物医疗电子股份有限公司 | Method and apparatus for inhibiting power frequency common-mode interference |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Dong Zhenlong Document name: payment instructions |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |