CN2308912Y - Switching inverting a. c. power voltage stabilizer - Google Patents
Switching inverting a. c. power voltage stabilizer Download PDFInfo
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- CN2308912Y CN2308912Y CN 97221238 CN97221238U CN2308912Y CN 2308912 Y CN2308912 Y CN 2308912Y CN 97221238 CN97221238 CN 97221238 CN 97221238 U CN97221238 U CN 97221238U CN 2308912 Y CN2308912 Y CN 2308912Y
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Abstract
The utility model relates to a switching inverting a. c. power voltage stabilizer, comprising a two-level rectification circuit, a two-level switching inverter circuit, a corresponding pulse-width modulation, and a control protection circuit. The first-level rectified output terminal of the main return circuit of the switching inverting a. c. power voltage stabilizer is connected with the capacitance of a filtering higher harmonic in parallel, and then the first-level rectified output terminal of the main return circuit of the switching inverting a. c. power voltage stabilizer is connected with the first-level switching inverter circuit. The first-level rectified output terminal of the main return circuit of the switching inverting a. c. power voltage stabilizer is connected with a secondary rectification circuit and the secondary-level switching inverter circuit by an isolation transformer. The output terminal of a secondary switching conversion circuit is directly connected with an ac power supply in series. The utility model is provided with the high quality factor of a switching voltage stablization power supply and is also provided with the high power output of a compensated stabilizer. The utility model is particularly suitable for the load which is varied frequently.
Description
The utility model relates to a kind of switch inversion formula alternating electromotive force voltage stabilizer, belongs to power electronics industrial technology field.
At present, the domestic alternating electromotive force voltage stabilizer of power system stability network voltage, assurance quality of voltage that is used for is based on electronic regulating compensation formula electric power voltage stabilizer.Compensation type ac voltage stabilizer is to introduce in recent years.Digestion, the external advanced Power Electronic Technique of absorption, the new product of development.Its structure mainly is made up of electric voltage regulator, compensator transformer and detection control circuit.It detects output voltage automatically, and according to the height of surveying voltage, drives reversible servomotor, adjusts the Loading voltage regulator of carbon brush contact, changes the direction and the size of pressure regulator output voltage.Be connected to the compensator transformer output voltage respective change of output voltage regulator because the compensator transformer output terminal connect with power supply, stabilizer output voltage be supply voltage and bucking voltage vector with, the output voltage maintenance after the compensation is stablized.The principal feature of sort circuit is the efficient height, and voltage regulation result is good, is suitable for doing the high-power electric voltage stabilizer, and capacity can reach about 1000KVA.Compensation type ac voltage stabilizer is in the ascendant in China at present, but some problems that product still exists have to be solved:
1. the Loading voltage regulator volume is big, involves great expense, and consumes a large amount of siliconized plates, electromagnetic wire.
2. rate of straining is slow, is needed more than 0.5 second to beginning action by change in voltage, and carbon brush moves that to adjust voltage speed very slow, therefore when supply voltage and load are undergone mutation, can not in time compensate.In the occasion of supply voltage and load frequent variations, voltage regulation result is not good enough yet.
3. in frequent action, carbon brush very easily weares and teares or ruptures, and reliability of products and life-span are had a strong impact on.
4. by servomotor, the gear train complex maintenance maintenance that worm and gear is formed is difficult.
Power Electronic Technique has obtained develop rapidly in recent years, Switching Power Supply has been occupied critical role in modern power technology, AD (exchanging the output of input direct current) switching power supply, DD (output of direct current input direct current) switching power supply have been widely used in every field such as industry, traffic, electric power, communication.As shown in Figure 1, AA (exchanging input AC output) isolation type switching power supply also is applied in Electric Machine Control and UPS uninterruption power source.IGBT, power MOSFET device are widely used in Switching Power Supply, and PWM pulse modulation technology, power factor correction technology, development are very rapid.The development of new theory, new technology, new unit, new material enters a new phase the Switching Power Supply development.Realize the High Power Factor of Switching Power Supply and the two big problems that high-power output has become the Switching Power Supply development at present.And the high power switching power supply that is used for electric system more people pay close attention to.The most at present SPWM of the employing sinusoidal pulse width modulation technologies of AA (exchanging input AC output) Switching Power Supply.The uncontrollable bridge rectifier circuit rectification of AC power input voltage process, and after the large bulk capacitance C filtering, become level and smooth substantially DC voltage as the switch converters power supply.Sort circuit has only when input voltage amplitude during greater than the filter capacitor both end voltage, and commutation diode could conducting, so ON time is lacked, dash current is big, and power factor is low.For improving this switch power supply power factor, in the quality high product, all adopt the dynamic power factor adjustment technology, but complex structure, the cost height.
The purpose of this utility model is exactly to provide a kind of switch inversion formula alternating electromotive force voltage stabilizer at the deficiency of prior art, it can improve the Switching Power Supply High Power Factor preferably, and realize high-power output with low power device, can realize AC sine wave large power output switch stabilized voltage supply.
The purpose of this utility model is achieved in that a kind of switch inversion formula alternating electromotive force voltage stabilizer; it comprises two-stage rectification circuit and two-stage switching inverter circuit; corresponding width modulation and control protection electric circuit; its input termination LC loop filter output terminal, output termination first order switching inverter circuit and secondary switch inverter circuit.The first order rectification output end of its major loop directly connects first order switching inverter circuit, connects secondary rectification circuit and secondary switch inverter circuit by isolating transformer again.
The on-off circuit of described first order inversion major loop can be bridge-type, semi-bridge type, single-ended and push-pull type on-off circuit.
The power supply bridge rectifier output terminal of described first order inversion major loop also connects the electric capacity of the low capacity of filtering higher hamonic wave, connects first order switch transformed circuit again.
Described second level switch transformed circuit output terminal is directly connected with AC power.
Described width modulation and control protection electric circuit input end one routing current bridge rectification output connect pulsewidth modulated intergrated circuit, and the output of pulsewidth modulated intergrated circuit connects first order switching inverter circuit again; The synchronous exciting circuit of another route and power supply connects second level switching inverter circuit.
The utility model main characteristics is:
1. Switching Power Supply adopts PAM and PWM comprehensively to modulate, and has two kinds of functions of pulse amplitude modulation and pulse-length modulation simultaneously.Realize the function that simple alternating current is exported by pulse amplitude modulation, by the height of pulse-length modulation control output voltage.Pulse amplitude modulation realizes that by special power supply mode rectification output end does not adopt large bulk capacitance filtering, and only adopting after the higher hamonic wave of suitable electric capacity filtering input current with pulsating dc voltage directly is derailing switch 1 power supply.Sort circuit is simple, output voltage waveforms good, distortion is little and synchronous fully with input voltage, and power factor approaches 1, need not to adopt the dynamic power factor adjustment technology, can make high-quality stabilized voltage supply.It is a kind of new departure of High Power Factor Switching Power Supply.
2. its feature also is to use " the switching regulator alternating electromotive force voltage stabilizer " of the comprehensive modulation technique exploitation of PAM, PWM, has adopted the input and output non-isolation series compensation voltage stabilizing technique different with the conventional switch power supply.Switching regulator AC voltage regulator output power is the product of source current and output voltage.And this moment, the transducer output power only was the product of source current and bucking voltage (output voltage and input voltage poor).So high several times of comparable general Switching Power Supply output power of this switching power supply real output (voltage stabilized range is that rated voltage can be extended to more than 4 times in positive and negative 20% o'clock approximately).
3. " switching regulator alternating electromotive force voltage stabilizer " is and present electric power stabilizator structure principle novel voltage stabilizing device all inequality, its characteristics are that also the switched power voltage stabilizer adopts the electronic power supply device of integrated, modularization, high frequencyization, has replaced the electromechanical assembly of conventional electric power voltage stabilizer; Obtained the economic benefit of high-speed, miniaturization, high efficiency performance index and energy-saving material-saving.Compare with the electronic regulating compensation formula electric power voltage stabilizer of widespread use; its key difference is that the switching regulator alternating current steady voltage plug works in tens kilo hertzs; the response time of control shortens hundreds of even several thousand times; pulse wide voltage-regulation with advanced technology replaces the electric voltage regulator pressure regulation; the weight and the size of whole device reduce significantly; utilize advanced integrated circuit to be provided with rationally overcurrent, o-volt protection reliably, performance index improve a lot.Be used for three-phase circuit and be convenient to the phase-splitting voltage stabilizing, can obtain optimum efficiency.
Below in conjunction with accompanying drawing and specific embodiments the utility model is described in further detail.
Fig. 1 is the circuit structure schematic diagram of prior art;
Fig. 2 is a main loop circuit schematic diagram of the present utility model;
Fig. 3 is a main loop circuit structural drawing of the present utility model;
Fig. 4 is a controlling circuit of voltage regulation schematic diagram of the present utility model.
Referring to Fig. 2, rectification circuit 1 is the uncontrollable rectification of bridge-type among the figure, and output voltage is as the power supply (first order switch converters can be used bridge-type, semi-bridge type, single-ended or push-pull type switch converters) of first order switch converters, and on-off circuit works in tens kilo hertzs.Pulse amplitude modulation realizes by special supply voltage, rectification circuit 1 output terminal does not adopt jumbo electrochemical capacitor, only adopting after the higher hamonic wave of suitable low capacity electric capacity filtering input current with pulsating dc voltage directly is switch converters 1 power supply, and this special power supply makes switch converters output have half-sinusoid carrier wave amplitude modulation HF voltage.PWM modulation special IC or Single-chip Controlling are adopted in width modulation, regulate the conduction ratio of trigger pulse width change switch converters to reach the voltage stabilizing purpose by detecting the output voltage size.One-level switch converters output termination high-frequency power transformer, this transformer has two functions: the firstth, carry out voltage transitions according to burden requirement, the secondth, output circuit and power input are isolated.Transformer output have half-sinusoid modulated subcarrier technique, a HF voltage that pulsewidth is adjustable, finish the wave mode translation function through secondary rectification and secondary switch translation circuit, output voltage is sinusoidal voltage behind the LC loop filter.
Referring to Fig. 3, voltage stabilizing control technology of the present utility model is the Switching Power Supply that the AA formula exchanges the input AC sinewave output, and it has adopted the input and output non-isolation series compensation voltage stabilizing technique different with the conventional switch power supply.Its design feature is: the switch transformed circuit output terminal directly with the voltage stabilizing of AC power series compensation, its output voltage be supply voltage and switch converters output voltage vector with.By detecting the size that output voltage modulation one-level High Frequency Switching Converters voltage pulse width changes bucking voltage, the direction of the conducting sequence change bucking voltage of regulation and control secondary inverse switch is used for the drop compensation voltage stabilizing or the compensation voltage stabilizing that boosts.Also can automatically switch or Single-chip Controlling equal regulated output voltage when overvoltage of power supply and low-voltage by the analog gate integrated circuit.
First order switch converters adopts push-pull circuit in the present embodiment, the control section principle as shown in Figure 4: IC2000 is a control integrated circuit, adopts TL494.Pulsed frequency be 30 kilo hertzs (by TL494 pin 5,6 connecting resistance electric capacity decisions), voltage control signal is taken from the Switching Power Supply output terminal by control transformer, after the rectifying and wave-filtering dividing potential drop, import by TL494 pin 1, pin 2 is by voltage stabilizing output power supply in the sheet, form comparative voltage, pin 3 connects feedback resistance, variation according to pin 1 input voltage, produce width modulation, turnable pulse width voltage exports pulse transformer to by pin 8,11, driving power switch (the pulse transformer is exported directly driving power pipe when utilizing the output of field effect transistor power, can select multiple special-purpose driving circuit for use when utilizing the output of IGBT device power).Pin 15,16 generally is used for overcurrent protection.Utilize the input of pin 4 high voltages the time to forbid the characteristic of exporting; be provided with the o-volt protection of high reliability as figure: stabilized voltage supply is during because of the under-voltage output of output short-circuit; the control transformer output voltage descends; the width modulation function will strengthen pulsewidth output to keep the balance of output voltage, will cause overcurrent.But this moment, pin 4 input high voltages forbade exporting pulse owing to brownout makes linear amplifier circuit IC201:B upset output HIGH voltage, and Switching Power Supply stops output with the protection power semiconductor device.IC201:C is a synchronizing circuit, and function is the AC signal of power supply to be become synchronous with it square wave and by IC201:A, two groups of circuit controlling and driving of IC201:D secondary switch transducer, realize output synchronously.
Switching regulator alternating electromotive force voltage stabilizer preferably resolves the problem that present electric power voltage stabilizer exists, and has both had the high quality factor of switching power supply, and the high-power output of compensated regulator is arranged again, is adapted to the load of frequent variations especially.Be the Switching Power Supply new Development on Application, the ideal product of electric power voltage stabilizer upgrading.The real standard of pressing present power semiconductor device is single-phase 0.5 to 10KVA and the low voltage electric network of three-phase 5 to 1000KVA in all can be applicable.The application of amorphous, microcrystalline soft magnetic alloy material is in recent years promoted rapidly, make high frequency switch power obtain significant development, switching frequency is brought up to more than 100 kilo hertzs by tens kilo hertzs, and the utility model adopts advanced magnetic material will release the more superior AA Switching Power Supply of performance.
The two-stage rectification circuit that the utility model is related and the particular circuit configurations of two-stage switching inverter circuit are consistent with prior art.
Claims (5)
1, a kind of switch inversion formula alternating electromotive force voltage stabilizer; it comprises two-stage rectification circuit and two-stage switching inverter circuit; corresponding width modulation and control protection electric circuit; its input termination LC loop filter output terminal; output termination first order switching inverter circuit and secondary switch inverter circuit; it is characterized in that: the first order rectification output end of major loop directly connects first order switching inverter circuit, connects secondary rectification circuit and secondary switch inverter circuit by isolating transformer again.
2, switch inversion formula alternating electromotive force voltage stabilizer according to claim 1, it is characterized in that: the on-off circuit of described first order inversion major loop can be bridge-type, semi-bridge type, single-ended and push-pull type on-off circuit.
3, switch inversion formula alternating electromotive force voltage stabilizer according to claim 1 is characterized in that: the power supply bridge rectifier output terminal of described first order inversion major loop also connects the low capacity electric capacity of filtering higher hamonic wave, connects first order switch transformed circuit again.
4, switch inversion formula alternating electromotive force voltage stabilizer according to claim 1, it is characterized in that: described second level switch transformed circuit output terminal is directly connected with AC power.
5, switch inversion formula alternating electromotive force voltage stabilizer according to claim 1, it is characterized in that: described width modulation and control protection electric circuit input end one routing current bridge rectification output connect pulsewidth modulated intergrated circuit, and the output of pulsewidth modulated intergrated circuit connects first order switching inverter circuit again; The synchronous exciting circuit of another route and power supply connects second level switching inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97221238 CN2308912Y (en) | 1997-07-16 | 1997-07-16 | Switching inverting a. c. power voltage stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97221238 CN2308912Y (en) | 1997-07-16 | 1997-07-16 | Switching inverting a. c. power voltage stabilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2308912Y true CN2308912Y (en) | 1999-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97221238 Expired - Fee Related CN2308912Y (en) | 1997-07-16 | 1997-07-16 | Switching inverting a. c. power voltage stabilizer |
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| Country | Link |
|---|---|
| CN (1) | CN2308912Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104281183A (en) * | 2014-08-25 | 2015-01-14 | 南京航空航天大学 | Non-contact power transmission voltage stabilizing system based on fuzzy feedback |
| CN104467391A (en) * | 2014-12-04 | 2015-03-25 | 上海沪工焊接集团股份有限公司 | Secondary inversion driving method |
-
1997
- 1997-07-16 CN CN 97221238 patent/CN2308912Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104281183A (en) * | 2014-08-25 | 2015-01-14 | 南京航空航天大学 | Non-contact power transmission voltage stabilizing system based on fuzzy feedback |
| CN104281183B (en) * | 2014-08-25 | 2016-04-27 | 南京航空航天大学 | A kind of transmitting non-contact electric energy voltage-stabilizing system based on fuzzy feedback |
| CN104467391A (en) * | 2014-12-04 | 2015-03-25 | 上海沪工焊接集团股份有限公司 | Secondary inversion driving method |
| CN104467391B (en) * | 2014-12-04 | 2017-09-26 | 上海沪工焊接集团股份有限公司 | Secondary inverting driving method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |