GB2263793A - Ac supply voltage regulator - Google Patents
Ac supply voltage regulator Download PDFInfo
- Publication number
- GB2263793A GB2263793A GB9201357A GB9201357A GB2263793A GB 2263793 A GB2263793 A GB 2263793A GB 9201357 A GB9201357 A GB 9201357A GB 9201357 A GB9201357 A GB 9201357A GB 2263793 A GB2263793 A GB 2263793A
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- Prior art keywords
- voltage
- input
- compensation
- subscriber
- output
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/24—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using bucking or boosting transformers as final control devices
- G05F1/26—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using bucking or boosting transformers as final control devices combined with discharge tubes or semiconductor devices
- G05F1/30—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using bucking or boosting transformers as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
An output voltage DE is stabilised by controlling a voltage BC which is added to an input supply voltage AE. The voltage BC is formed by a feedback-controlled switched bridge Q1-Q4 receiving as input the full-wave rectified input voltage, and feeding a pulse-width modulated output voltage to a transformer T. This voltage may be phase-reversed to allow bucking or boosting of the supply. <IMAGE>
Description
REPRODUCTIVE AC VOLTAGE STABILIZER
FIELD OF THE INVENTION:
In view of voltage transformation of subscriber's power terminal, which results from power company's alternators, power delivery instrinsic resistance, load size, and heavy machine initiating, and which results in a too high or too low voltage to damage subscriber's equipment and products, the inventor is motivated to provide an AC stabilizer which has advantages as follows: high frequency, speed, small volume, light body, low noise, non-moveable elements, non-contact point sparks, ability of non-consideration of reactive factor and bearing of larger over-load.
BACKGROUND OF THE INVENTION:
As it is said, there are various types of conventional stabilizers: (1) Motor type or motor rotary inductance type: moveable elements abrasion, spark, large volume, bulky, very low reaction speed. (2) Phase Control type: Using silicon control rectifier to control the phase angle of a power supply. Much noise, much impure communication, large volume, heavy body, large work current. (3) Iron Resonance
Transformer type: Using the resonance theory to stabilize voltage; high temperature, much noise, low efficiency, large volume, bulky, minor ability for over loaded current. (4)
Magnetic Saturation Inductance type: Using the characteristic saturation of transformation; large volume, bulky, much noise. (5) Digital or Flip-flop type: output non-linear voltage, which is transformed in gradient flip-flop type.Bad stable voltage rate, using relay as its main element; abrasion, spark, bad transient state, slow reaction. If the main elements are made of silicon control rectifier, it will suffer from the defects of bad power factor, slow reaction, wrong operation, and low reliability.
(6) Removed phase or amplifier type: Its circuit must have rectifying and filter wave circuit, filter wave capacity, resulting in bad input power factor, low efficiency, high temperature, large volume, bulky, and bad reliability.
The present invention breaks through conventional technology. Under the condition that no input factors has to be taken into consideration, using the double modulation theory of high frequency pulse height (PAM) and high frequency pulse width (PWM) to modulate subscriber's AC power supply and reproduce a sine wave which can meet the need of amplitude so as to compensate power supply (VRC) (See FIG 1). Again, by using PWM technology, the change of feed-back signal can change the pulse width after self-made triangular wave and feed-back signal are compared through comparator. The transformation of this pulse width can directly control the amplitude size of new voltage supply
VBC. And, by using phase-exchange technology, VBC voltage supply has additive polarity or substractive polarity voltage.When subscriber's power voltage is too high, VBC becomes substractive polarity; when subscriber's power voltage is too low, VBC becomes additive polarity; when it is normal, VBC is zero. So output of the present invention is always a rated constant. (Foot note: output of this invention is VDE, VAE + VBC = VDE (Constant).
SUMMARY OF INVENTION:
The object of this invention is to provide a speed compensation or reduce AD voltage transformation of subscriber's power so that the circuit of this invention can provide stable AC power supply and protect his products and equipment.
Another object of the invention is to provide a reproduced AC voltage stabilizer by means of modulation of high-frequency pulse height and high frequency pulse width.
To fulfil all effects mentioned above, the invention used some technical methods, contents, and an embodiment of complete-bridge, semi-bridge, push-pull stabilizer so as to analyze high frequency technology used in low frequency transformer, high frequency transformer, and high frequency technology. Detail description of the invention is as follows:
BRIEF DESCRIPTION OF THE DRAWINGS:
FIG 1 is a view of square diagram of the invention.
FIG 2 is a view of compensation circuit of the first embodiment according to this invention.
FIG 3 is a view of wave forms diagram according to the points of FIG 2.; 3-10 are comparative circuit diagram.
FIG 4 is a view of compensation circuit of the second embodiment according to this invention.
FIG 5 is a view of wave forms diagram of each point.
DESCRIPTION OF THE PREFERRED EMBODIMENT:
The first embodiment according to the invention: (Modulation of low frequency transformer and high frequency pulse width)
As shown in FIG 2, the compensation circuit of the invention is comprised of a coil L. The coil L has two ends and its ends are multiple joined to C1, C2, Znr, and the (+) output ends of BD (Bridged rectifier) which are connected to collector ends Q1 and Q3. Two incident polar ends of crystals are respectively connected to collector ends Q2 and
Q4 and anode ends D1 and D3, and are multiple-joined to first-class coils P1, P2 of a low frequency transformer T.
The cathode of D1 and D3 connect to an absorbing circuit consisting of filter wave capacity C4, R1, R2, R3, ZD1 and
Q5. Incident and collector polars of Crystals Q2, Q4 are respectively connected to diode D2, D4. The two incident and collector polars of the two crystal, the anode end of diode, absobing circuits of C4, R3, Q5 incident-collector ends are respectively connected between (-) output end of BD, and secondary coils S1,S2 of transformer T, and which are multiple join to a capacity C3 and serialize to C2, Znr, base polar of crystal Q1, Q2, Q3, Q4 with input ends of B1,
B2, B3, B4 which respectively receive the input of modulation signal of high frequency pulse height and width.
The actual circuit of this invention is as mentioned above, through high frequency filter and sudden wave absorber to bridged rectifier, subscriber's power supply (see FIG 3-1) is converted into complete wave pulse DC at the end of bridged rectifier (see FIG 3-2). It need not multiplize with filter capacity to avoid turning input power factor bad. According to the conventional PWM modulation technology, the volume of feed-back signal can directly change the width of high frequency pulse width signal. When voltage of subscriber's power is too high or too low, this signal can produce wider pulse signal; that is, it produces compensation voltage source of larger amplitude. When the voltage of subscriber's power is equivalent to the rated voltage of this invention, the width of PWM is zero.When subscriber's power is input in B1,B4 (see FIG 3-3) in the right half period, it will result in that Q1 and Q4 will guide the low frequency transformer to gain wave form of power supply at secondary coil side. (see FIG 3-4). When PWM is input into B2, B3 during minus half period (see FIG 3-5), it results in that Q2 and Q3 quide to transformer secondary coil side and gain power source wave form (see FIG 3-6), so the active and negative half week line combine wave form of transformer secondary coil side (see FIG 3-7). By means of resonance and filter wave capacity C3 of transformer (see
FIG 3-8), it gains compensation voltage source. This voltage source is an AC sine wave which is in complete agreement with subscriber's power. The amplitude of power source is changed according to impulse' width and height. So at the input end, it gains a wave form, and is the total sum of AC input voltage and the compensation power supply wave form.
(see FIG 3-9
When voltage of subscriber's power is low, increase the pressure; when it is high, reduce the pressure; that is, the voltage in low frequency transformer secondary coil side inductance must be in 180 degree of opposite phase. So that during the power supply positive half period, input pulse width modulate into B3 and B2; during negative half period, input it into B1 and B4. Thus the goal can be reached. As a result, the same transformer can be used either when increasing pressure or reducing pressure. In this way, the present invention can have the advantages, such as small volume and light body.
When subscriber's power voltage is normal, loaded current flows through transformer secondary coil side, when second coil side has DC instrinsic resistance and AC inductive reactance. This inductive reactance is much greater than DC instrinsic resistance, in fact it is a kind of energy consumption. So that the present invention, at this time, forces to send signal to B2, B4, and forces Q2,
Q4 to connect with each other. Through P1-Q2-Q4-P2 or
P2-Q4-Q2-P1, the transformer first side results in a short so as to change AC inductive reactance of the transformer.
And it enables AC inductive reactance of the transformer at secondary coil side to drop almost to zero degree so as to improve the work efficiency of this invention.
When signals are exchanging, energy preserved by transformer leakage inductive reactance can not feed back to power bridge BD (+)(-) terminals, because the terminal can only supply pulse DC, but cannot absorb preserved energy.
Therefore, the invention has an independent device for absorbing circuit, and by means of the discharge from D1, D2 to C4, and when discharge voltage is too high, leakage inductive energy consumes energy through R1, Q5, R2, ZD1,
R3. (note: switch element of this invention is electric crystal, or field effect crystal, or GTO (Close silicon contro rectifier), or other switch elements.)
As mention above, conventional technology can get feed-bah error amplification and triangle generator. As shown in FIG 3-10, input these two kinds of signals into comparator, comparator circuit shows that feed-back signal is input into positive end '+ of comparator A and into negative end (-) of comparator B. Triangle wave is input into positive end - of comparator A and into negative end (+) of comparator B.So that output end of comparator A receives pulse width modulation signal PWM, when input voltage is too high, and needs to reduce pressure in opposite direction, it provides signal PWM. Output end of comparator B provides pulse width modulation signal when input when input voltage is too low, and needs to reduce pressure in the same direction, it provides signal PWM. When comparators A,B do not output, input voltage is normal and need not to increase or reduce pressure. From Negative- Or
Gate (NOR), high state can be attained to provide decision to change transformer AC resistant reaction signal.
The Second Embodiment according to the present invention: (High frequency transformer, high frequency pulse width modulation technology)
As shown in FIG 4-1, compensation circuit of the second embodiment is comprised of a coil L1, the two ends of the coil L1 connect to C11, C21, Znr1 and BD1. And the (+) output ends of BD1 (Bridged rectifier) which are connected to collector ends Q11 and Q31. Two incident polar ends of crystals are respectively connected to collector ends Q21 and Q41 and anode ends D11 and D31, and are multiple-joined to first-class coils P11, P21 of a low frequency transformer
Tf. The cathode of D11 and D31 connect to an absorbing circuit consisting of filter wave capacity C31, R11. R21,
R31, ZD11 and Q51.Incident and collector polars of Crystals
Q21, O41 are resoectively connected to diode D21, D41. The two incident and collector polars of the two crystal, the anode end of diode, absobing circuits of C41, R31, Q51 incident-collector ends are respectively connected between (-) output end of BD1, and secondary coils S1,S2 of transformer Tf, and which are multiple joined to bridged rectifier BD3, Q, 7. Between the incident-collector oolars of the two crystal Q6, Q7a and Tf secondary coil extractcr serializes to L2. C31, L3, C32, base polar of crystal with input ends of B11, B21, B31, B41 which respectively receive the input of modulation signal of high frequency pulse height and width.Input ends B6 and B7 receives positive and negative half period switch signal which is in agreement with subscriber's power simultaneously.
When AC input voltage VAE, as shown in FIG 5-1, is rectified through bridge into complete pulse during Dositive and negative half periods, as shown in FIG 5-2, when subscriber's power is too low, accompanied b high frequency
PWM pulse width, which will be amplified and generate high positive half period, as shown in FIG (5-3). The rate of the high frequency negative half period is smaller than 50 < .
Input high frequency positive half period into B11, B41, and flow through high frequency current at Q11, Q41, as shown in
FIG 5-5. High frequency negative half period is input into
B31, B21 and flows through high frequency Q31, Q21, as shown in FIG 5-6. So that during the preliminary stage of high frequency transformer, high frequency wave form of negative and positive half can be attained, as shown in FIG 5-7. The amplitude of high frequency wave is the amplified height of subscriber's power supply, the transformation of its wave form has a tendency to two opposite direction.
Above the zero point of positive half period is the positive direction wave; under the zero point of it is the negative direction wave. Above the zero point of negative half period is the negative direction wave: under the zero point of it is the positive direction wave.
Preliminary side two-direction pulse waves are respectively induced to secondary side, and secondary side is induced to S1-B, which has completely the same step, phase, and two-direction pulse wave form as the subscriber's power, as shown in FIG 5-7; whereas secondary side S2-B inductive wave form is contrary to that of S1-B; that is, it is contrary to subscriber's power, as shown in FIG 5-8.
When power source input voltage is too low, it is necessary to increase pressure, and compensation power source produces wider pulse width by means of PWM technology so as to gain a proper amplitude. This compensation power supply wave form must have a voltage which has the same phase as subscriber's. Power supply frequency positive half period can select D5, D6, and Q6 to connect with, (through power source positive half period synchronizing signal, as shown in FIG 5-9); power source negative half period selects
D7, D8, and Q7 to connect with (through power source negative half period synchronizing signal, as shown in FIG 5-10). So that direction-changing switch Q6, Q7 do a direction- changing control. On ends F, B, there produces wave form as shown in FIG 5-11.Through L3 and C31 as high frequency filter wave the wave form produces pure sine wave as shown in FIG 5-12. The wave form is serialized with and added with power source; and gain output voltage VDE. VDE=
VAE + VCB.
When subscriber's power supply is too high, it is necessary to decrease pressure so that by means of PWM technology, compensation voltage source generates wider pulse width and results in a proper power supply amplitude.
The compensation power supply must be contrary to the subscriber's. Through power supply positive half period synchronous signal wave form, as shown in FIG 5-9, it can be input into Q6 among the circuits D5,D6,Q6. So that it can form a wave form, as shown in FIG 5-13, at F-B terminal; likewise, it forms a wave form, as shown in FIG 5-14, at C-B terminal. The sine wave is contrary to subscriber's. So that output of the present invention is VDE=VAE-VCB and gains a stable voltage.
When subscriber's voltage is normal, it can obtain zero width by means of PWM technology so that compensation power source amplitude is zero and input voltage is equivalent to output voltage; that is, VDE= VAE + 0 = VAE. By means of high frequency pulse signal, it can modulate its width and control its power source wave form period so as to increase pressure in positive direction or reduce pressure in negative direction.As a result, output voltage of the invention can be a rated value. (Functions Q6, Q7 of said phaseexchanging switch can be replaced by Q6A, Q7A, as shown in 4-2; Q11, Q21, Q31, Q41 can be replaced by Q21A, Q41A so as to gain the special phase-exchanging function of increasing pressure in positive phase and reducing pressure in negative phase by means of period output control over voltage of high frequency transformer secondary side coils.)
Of course, When the invention operates, energy preserved by leakage inductive reactance of high frequency transformer Tf can not feed back to power supply bridged (+) (-) terminals of BD1.Because the terminal only provides pulse DC and can not absorb preserved energy, the invention provides an independent absorbing circuit so that by charging C41 through D11, D21, leakage inductive reactance energy consumes its energy through R11, Q51, R21, ZD11, R31 when charge energy is too high. In this way, the invention can enforce reliability.
In short, the invention has the following four characteristics:
(1) To gain compensation voltage and pressure-reduced energy, which high frequency AC stabilizer needs, is to use pulse width to directly rectify modulation of subscriber's power source, but not to modulate pulse width DC filter wave and pulse height modulation wave Because this wave form has very low harmonic wave component which is in disagreement with its real form in power source basic wave, it will gain a new sine wave of non-input power factor consideration, by means of simple resonant filter wave.
(2) Reproductive AC stabilizer only properly modulate subscriber's power source positive and negative half period signal of control transformer preliminary switch elements in periodic order, after deciding to compensate pressure or to reduce pressure; if only technology of low frequency transformer high frequency modulation is used, the phase-exchanging technology can attain the function of pressure compensation or pressure reduction. If use high frequency transformer high frequency pulse modulation technology, only properly mutually modulate subscriber' power source positive and negative half period synchronous signal of control transformer secondary (secondary side) switch elements in periodic order, it changes the phase of phase-changing switch crystal current and obtains the function and effect of compensating pressure in positive phase and reducing pressure in negative phase.
(3) Reproductive AC stabilizer, when subscriber's power input is too high or too low, has to compensate proper voltage or reduce pressure. The amplitude of the compensation voltage source is determined by the input high or low voltage. When value of subscriber's input voltage tends to be equivalent to that of rated output voltage of stabilizer, its amplitude tends to be smaller and smaller.
The compensation voltage amplitude, when the input is too high or too low, has large compensation voltage source amplitude; when input voltage is equivalent to rated output voltage value of stabilizer, amplitude of compensation power supply is zero.
(4) Reproductive AC stabilizer uses low frequency transformer high frequency technology, because when low frequency transformer does not need to compensate pressure or reduce pressure, transformer secondary side has AC impedance high enough to influence the efficiency of stabilizer. By means of the technology of turning impedance of transformer preliminary side to be low, the stabilizer can improve its effective.
In conclusion, the invention achieves the effect of stabilizing subscriber's power source by means of high frequency modulation, with fast reactive speed, without low frequency noise, without impact magnetic current of conventional transformer, and with high effectiveness. Its wider stable voltage range is low voltage -20% and high voltage + 30% of rated voltage, and has a more flexible changeable range. When input voltage of the invention is 85
V, its output voltage is actually estimated as 110.1 V, and its rate of stability is far much lower than 1%. The length, width, height of outer shape of the invention is 37.5 mm x 8.0 mm x 7.0 mm, about 1/8 volume of the conventional computer AC electro-stabilizer. The weight of the invention is 0.75 KG, about 1/15 of that of a conventional type. Its structure is unique and practically useful. Accordingly the reader is requested to determine the scope of the invention by the appended claims and their legal equivalents, and not by the examples which have been given.
Claims (4)
1. Reproductive AC voltage stabilizer comprising: a compensation circuit of the invention comprised of a coil
L, the coil L has two ends and its ends are multiply joined to C1, C2, Znr, and the (+) output ends of BD (Bridged rectifier) which are connected to collector ends Q1 and Q3, two incident polar ends of crystals are respectively connected to collector ends Q2 and Q4 and anode ends D1 and
D3, and are multiple-joined to first-class coils P1, P2 of a low frequency transformer T, the cathode of D1 and D3 connect to an absorbing circuit consisting of filter wave capacity C4, R1, R2, R3, ZD1 and Q5, incident and collector polars of Crystals Q2, Q4 are respectively connected to diode D2, D4, the two incident and collector polars of the two crystal, the anode end of diode, absobing circuits of
C4, R3, Q5 incident-collector ends are respectively connected between (-) output end of BD, and secondary coils
S1,S2 of transformer T, and which are multiple join to a capacity C3 and serialize to C2, Znr, base polar of crystal
Q1, Q2, Q3, Q4 with input ends of B1, B2, B3, B4 which respectively receive the input of modulation signal of high frequency pulse height and width; a comparator circuit composed of feed-back amplifying signal, triangular wave alternator, two comparator, and a negative-or-box (NOR) for producing a pulse width modulation signal of compensation power supply; by means of combination of said structure, the compensation power supply of compensation circuit directly is gained by rectifying subscriber's power supply through pulse width, but not modulating pulse wave of filter wave; the amplitude of the compensation voltage source is determined by the input high or low voltage. When value of subscriber's input voltage tends to be equivalent to that of rated output voltage of stabilizer, its amplitude tends to be smaller and smaller, the compensation voltage amplitude, when the input is too high or too low, has large compensation voltage source amplitude; when input voltage is equivalent to rated output voltage value of stabilizer, amplitude of compensation power supply is zero; the output of comparator circuit determines that compensation circuit has t9 increase or reduce pressure, or to high state output only for low frequency transformer preliminary switch element to technically change phases of subscriber's power supply in period order so as to gain its function.
2. As claimed in Claim 1, reproductive AC voltage stabilizer whereas subscriber's power supply gains compensation circuit and is determined by output of comparator circuit, when high frequency pulse width modulation signal and positive half period switch signal of comparator circuit output is input into compensation circuit B1, B4, and when negative half period switch signal is input into B2, B3, at secondary coil of low frequency transformer T, it can gain an increasing AC sine wave so as to compensate increasing pressure to low subscriber's power and gains a function of stably output voltage; when high frequency pulse width modulation signal of comparator circuit output changes in period order for positive and negative phase-exchange; that is, when positive half period switch signal compensation circuit is input into
B2, B3, and when negative half period switch signal is input into B1, B4, at secondary coil of low frequency transformer
T, it can gain a reducing AC sine wave so as to compensate reducing pressure to high subscriber's power and gains a function of stably output voltage;
When subscriber's power supply is normal, comparator circuit is high state output, and in compensation circuit, low frequency transformer secondary coil forms inductive reactance which can be exchanged through preliminary impedance, and quickly absords its inductive resistance and energy consumption so as to improve effect of stabilizer.
3. As claimed in claim 1, reproductive AC voltage stabilizer whereas a coil L1 having two ends which connect to C11, C21, Znrl and BD1, and the (+) output ends of BD1 (Bridged rectifier) which are connected to collector ends
Q11 and Q31, two incident polar ends of crystals are respectively connecte to collector ends Q21 and Q41 and anode ends D11 and D31, and are multiple-joined to first-class coils P11, P21 of a low frequency transformer
Tf, the cathode of D11 and D31 connect to an absorbing circuit consisting of filter wave capacity C31, Rill, R21,
R31, ZD11 and Q51, incident and collector polars of Crystals
Q21, Q41 are respectively connected to diode D21, D41; the two incident and collector polars of the two crystal, the anode end of diode, absobing circuits of C41, R31, Q51 incident-collector ends are respectively connected between (-) output end of BDl, and secondary coils S1,S2 of transformer Tf, and which are multiple joined to bridged rectifier BD3, Q6, Q7; between the incident-collector polars of the two crystal Q6, Q7a and Tf secondary coil extractor serializes to L2, C31, base polar of crystal with input ends of B11, B21, B31, B41 which respectively receive the input of modulation signal of high frequency pulse height and width; input ends B6 and B7 receives positive and negative half period switch synchronous signal; by means of combination of said structure, the compensation power supply of compensation circuit directly is gained by rectifying subscriber's power supply through pulse width, but not modulating pulse wave of filter wave; the amplitude of the compensation voltage source is determined by the input high or low voltage; when value of subscriber's input voltage tends to be equivalent to that of rated output voltage of stabilizer, its amplitude tends to be smaller and smaller, the compensation voltage amplitude, when the input is too high or too low, has large compensation voltage source amplitude; when input voltage is equivalent to rated output voltage value of stabilizer, amplitude of compensation power supply is zero; the output of comparator circuit determines that compensation circuit has to increase or reduce pressure, or to high state output only for low frequency transformer preliminary switch element to technically change phases of subscriber's power supply in period order so as to gain its function.
4. As claimed in claim 1 and claim 3, reproductive AC voltage stabilizer whereas subscriber's power supply gains compensation circuit and is determined by output of comparator circuit, when high frequency pulse width modulation signal and positive half period switch signal of comparator circuit output is input into compensation circuit B1, B4, and when negative half period switch signal is input into B2, B3, at secondary coil of low frequency transformer T, it can gain an increasing AC sine wave so as to compensate pressure to low subscriber's power and gains a function of stably output voltage; ;
When subscriber's power supply is normal, comparator circuit is high state output, and in compensation circuit, low frequency transformer secondary coil forms inductive reactance which can be exchanged through preliminary impedance, and quickly absords its inductive resistance and energy consumption so as to improve effect of stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9201357A GB2263793A (en) | 1992-01-22 | 1992-01-22 | Ac supply voltage regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9201357A GB2263793A (en) | 1992-01-22 | 1992-01-22 | Ac supply voltage regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9201357D0 GB9201357D0 (en) | 1992-03-11 |
| GB2263793A true GB2263793A (en) | 1993-08-04 |
Family
ID=10709045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9201357A Withdrawn GB2263793A (en) | 1992-01-22 | 1992-01-22 | Ac supply voltage regulator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2263793A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2073919A (en) * | 1980-04-14 | 1981-10-21 | Westinghouse Electric Corp | High-power ac voltage stabilizer |
| US4352055A (en) * | 1980-10-24 | 1982-09-28 | Oneac Corporation | AC Variable voltage source utilizing pulse width modulation |
| US4692686A (en) * | 1985-08-20 | 1987-09-08 | Thomas Charles E | Low-distortion line voltage regulator |
| US4716357A (en) * | 1985-12-06 | 1987-12-29 | Edward Cooper | AC voltage regulator with split primary switching |
| US4896092A (en) * | 1988-10-12 | 1990-01-23 | Power Distribution, Inc. | Voltage regulator for AC single phase and three phase systems |
-
1992
- 1992-01-22 GB GB9201357A patent/GB2263793A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2073919A (en) * | 1980-04-14 | 1981-10-21 | Westinghouse Electric Corp | High-power ac voltage stabilizer |
| US4352055A (en) * | 1980-10-24 | 1982-09-28 | Oneac Corporation | AC Variable voltage source utilizing pulse width modulation |
| US4692686A (en) * | 1985-08-20 | 1987-09-08 | Thomas Charles E | Low-distortion line voltage regulator |
| US4716357A (en) * | 1985-12-06 | 1987-12-29 | Edward Cooper | AC voltage regulator with split primary switching |
| US4896092A (en) * | 1988-10-12 | 1990-01-23 | Power Distribution, Inc. | Voltage regulator for AC single phase and three phase systems |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9201357D0 (en) | 1992-03-11 |
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