CN87212555U - Fully automatic ac stabilizer - Google Patents

Abstract

The utility model relates to a contactless stepped voltage regulation type fully automatic AC stabilizer using a bidirectional thyristor as a multiple tapping point auto-transformer shifting element. When the fully automatic AC stabilizer is turned on, no abnormal high voltage is output, when the shifting is done, no pulse high voltage or momentary power failure phenomenon generates, and a refrigerator protection device is accompanied. The utility model has the advantages of small size, light weight, low cost, no noise and small waveform distortion, and the control circuit of the fully automatic AC stabilizer is entirely composed of integrated circuits to make the circuit simple, reliable and with stable performance. The utility model is especially suitable for installation beside the electrical meter in the inhabitant's house to stabilize the voltage to the entire home-use main power line.

Description

Fully automatic AC stabilizer

The utility model is about using the stepped voltage regulation formula full-automatic AC voltage stabilizer of bidirectional triode thyristor as many tapping points autotransformer selector.It is invention about family expenses civil power voltage stabilizer.

Existing full-automatic AC voltage stabilizer mainly contains three kinds of saturation core regulator (saturation core regulator), electronic AC voltage stabilizer and automatic compensation type pressure regulators (motor pressure-adjusting type voltage stabilizer).Be stepless voltage regulation, output voltage stabilization, but big because of price height, big, the unloaded consumable power of volume, reason such as noise is arranged, should not be used for the voltage stabilizing of family to civil power.

Use the stepped voltage regulation formula full-automatic AC voltage stabilizer of relay in the market, have advantages such as price is low, volume is little, waveform distortion is little as many tapping points autotransformer Gear-shift switch, but if as in the family to the voltage stabilizing of civil power, still have following shortcoming:

1. during relay conversion work state, momentary power failure phenomenon is arranged, and, seriously disturbed the operate as normal of household electrical appliance, shortened serviceable life because the self-induction of transformer has produced high-voltage pulse.

2. when voltage stabilizer is just started shooting, surpressure output is arranged.

3. when relay is changed in working order, mechanical noise is arranged.

4. voltage stabilizer is being set near the gear shift voltage, may produce the relay phenomenon of gear shift back and forth repeatedly.

5. adopt discrete component to constitute control circuit, stability and reliability are relatively poor.

6. during long-term work, relay is easy to failure, causes short circuit between Transformer Winding, and voltage stabilizer is damaged.

The inventor has finished the present invention in order to solve the existing problem of full-automatic AC voltage stabilizer that constitutes with many tapping points autotransformer finally through conscientiously studying.

The objective of the invention is for a kind of other full-automatic AC voltage stabilizer that civil power is carried out voltage stabilizing of watt-hour meter that is suitable for being installed in the family is provided; it should have that price is low, volume is little, in light weight, noiseless, waveform distortion are little, highly reliable; noiseless and the infringement to household electrical appliance, and with characteristics such as protective device of refrigerator.

The utility model has replaced relay to form selector with bidirectional triode thyristor, constitutes control section with integrated circuit, and has set up No. one refrigerator outage delay protection device.

The utility model is finished as follows:

Mode 1: shown in Fig. 1 functional-block diagram, input voltage has produced multiple alternating voltage through autotransformer (1), voltage-level detector (3) detects output voltage, after code translator (4) decoding, output signal is to buffering driver (5), when alternating voltage is zero, send pulse strobe by over-zero trigger (6), make buffering driver output a control signal to selector (2), drive a suitable bidirectional triode thyristor, the tapping point of voltage conforms voltage stabilizing value in the transformer is linked to each other with output line, realized the purpose of fully automatic contactless no-voltage gear shift stepped voltage regulation.Refrigerator protector (7) when sending a telegram here, has the delayed firing function again after outage, played the effect of protection refrigerator.

Mode 2: shown in Fig. 2 functional-block diagram, input voltage is through autotransformer (1), produce multiple alternating voltage, voltage-level detector (3) detects output voltage, after decoding scheme (4) decoding, directly control selector (2), drive a suitable bidirectional triode thyristor, the tapping point of voltage conforms voltage stabilizing value in the transformer is linked to each other with output line, realized the purpose of fully automatic contactless stepped voltage regulation.Refrigerator protector (7) is with mode 1; mode 3: shown in Fig. 3 functional-block diagram; input voltage detects by voltage-level detector; after decoder for decoding, output a control signal to selector (2); control a two-way controllable silicon conducting; the one suitable tapping point and the input power cord of autotransformer are joined, guaranteed the stable of output voltage.Realized the purpose of fully automatic contactless stepped voltage regulation.

Accompanying drawing 4 is a kind of embodiment circuit diagrams of mode 1, and it divides the Pyatyi pressure regulation to AC power, and 1,2 joints of many tapping points autotransformer B connect input ac power, joint 3,5 output burning voltages, joint 3,4 output refrigerator protection power supplys.

D in the circuit ₁～D ₄, C ₁Form current rectifying and wave filtering circuit, BG ₁, R ₆, C ₂, C ₅, DW ₁Form D.C. regulated power supply.Resistance R ₁～R ₅Form sample circuit, R ₇With DW ₂Form reference voltage, DW ₂C in parallel ₃When making firm start, ac output voltage is changed from low to high, has eliminated the generation of surpressure, by IC ₁～IC ₄And R ₈～R ₁₉Formed Schmidt trigger, sampling voltage and reference voltage are compared, it is exported by IC ₅～IC ₈After the code translator of forming is deciphered, output to buffering driver IC ₉～IC ₁₃, IC ₁₅And D ₅, D ₆, R ₂₆～R ₃₂, DW ₁, DW ₄The zero-crossing detector of forming, when alternating voltage zero-crossing, output low level signal, gating buffering driver IC ₉～IC ₁₄, make controllable silicon T ₁～T ₅In a conducting when zero passage, the tapping point and the output line that make autotransformer meet the voltage stabilizing value join, and have finished the purpose of the contactless conversion of full-automatic stepped voltage regulation.

Direct supply passes through R ₃₆To C ₄Charge, work as C ₄On voltage be higher than R ₃₇With R ₃₈Dividing potential drop the time, by IC ₁₆And R ₃₃～R ₃₅The Schmidt trigger output low level of forming is through IC ₁₇After anti-phase, output to buffering driver IC ₁₄, after zero-crossing detector sends the low level gating signal, drive controllable silicon T ₆When outage, C ₄Pass through D ₇Discharge rapidly makes circuit have the function of outage time-delay, has played the effect of protection refrigerator.

IC ₁～IC ₄, IC ₁₅, IC ₁₆Be four high guaily unit integrated circuit LM324, IC ₅～IC ₈Be four XOR gate 74LS86, IC ₉～IC ₁₄Be six anti-phase/impact damper CC4502, IC ₁₇Be phase inverter 74LS04.

Accompanying drawing 5 is a kind of embodiment circuit diagrams of mode 2, and it divides the level Four pressure regulation to AC power, and except that not having the Zero voltage transition function, all the other principles are with embodiment circuit diagram 3.

Accompanying drawing 6 is a kind of embodiment circuit diagrams of mode 3; it divides two-stage pressure-regulating to alternating voltage; there are not Zero voltage transition and protective device of refrigerator; bidirectional triode thyristor is connected on the elementary of autotransformer; and increase a small transformers; as the power supply and the sampling voltage of control circuit, all the other principles are with embodiment circuit diagram 3.

The all available commonsense method manufacturing of the foregoing description.

The utility model has following advantages with comparing as the full automatic grading pressure-adjusting type AC voltage regulator of many tapping points auto-transformer selector with relay in the market:

1, voltage-stablizer does not have abnormal pressure to produce when start.

2, during the voltage-stablizer gear shift, no high-voltage pulse produces and of short duration circut breaking.

Noiseless when 3, voltage stabilizer is worked.

4, control circuit constitutes with integrated circuit, and simple in structure, stable performance, debugging is convenient, reliability is high.

5, voltage-level detector design has hysteresis voltage, has avoided near gear shift voltage gear shift phenomenon back and forth repeatedly.

6, consumable power is little.

7, with protective device of refrigerator.

8, the voltage stabilizer gear shift can realize Zero voltage transition.

9, selector does not have mechanical fault, the reliability height.

The utility model provides a kind of full-automatic AC voltage stabilizer that can be for household use, also can need alternating current is carried out the occasion of full-automatic stepped voltage regulation for other.The utility model has only increased a few components, has just possessed the refrigerator defencive function, and this utility model has no adverse effects to household electrical appliance and disturbs.

Claims (7)

1, one has the stepped voltage regulation formula full-automatic AC voltage stabilizer that many tapping points autotransformer [1] and selector [2] and control circuit thereof constitute.It is characterized in that forming contactless selector with many bidirectional triode thyristors, control circuit constitutes ， And with refrigerator protector [7] by voltage-level detector [3], code translator [4], zero-crossing detector [6], buffering driver [5].

2, by the stable-pressure device of claim 1 regulation, it is characterized in that said zero-crossing detector, buffering driver and refrigerator protector can partly or entirely omit.

3, by the stable-pressure device of claim 1 or 2 regulations, it is characterized in that said voltage-level detector (3), by D ₁～D ₄And C ₁Form current rectifying and wave filtering circuit, R ₁～R ₅After connecting successively, R ₁Connect its positive pole, R ₅Connect its negative pole; R ₈, R ₁₁, R ₁₄, R ₁₇An end be connected on R respectively ₁And R ₂, R ₂And R ₃, R ₃And R ₄, R ₄And R ₅Tie point on, the other end is connected on IC respectively ₁～IC ₄Inverting input on; R ₁₀, R ₁₃, R ₁₆, R ₁₉An end be connected on IC respectively ₁～IC ₄In-phase input end on, the other end is connected on respectively on the corresponding output terminal; DW ₂With C ₃Back in parallel and R ₇Series connection, DW ₂, C ₃Connect power cathode, R ₇Connect through R ₆, BG ₁, C ₂, DW ₁, C ₅Positive pole 5 ends after the voltage stabilizing, R ₉, R ₁₂, R ₁₅, R ₁₈One end all is connected on R ₇, DW ₂, C ₃Tie point on, the other end is connected on IC respectively ₁～IC ₄In-phase input end on.

4, by the stable-pressure device of claim 1 or 2 regulations, the said code translator of its feature (4) is made of IC XOR gate or biconditional gate ₅Input end be connected on IC respectively ₁With IC ₂Output terminal on, IC ₆Input end be connected on IC ₂With IC ₃Output terminal on, IC ₇Input end be connected on IC ₃With IC ₄Output terminal on, IC ₈Input end be connected on IC ₄On output terminal and the positive source 5.

5, by the stable-pressure device of claim 1 or 2 regulations, the said over-zero trigger of its feature (6) is mainly formed two margining detecting circuits by integrated operational amplifier.R ₂₈～R ₃₀After the series connection, R ₂₈Connect positive source 5, R ₃₀Connect power cathode; R ₂₆One terminates at R ₂₈With R ₂₉Contact on, the other end is connected on IC ₁₅Inverting input and D ₅Anode on; R ₂₇One terminates at R ₂₉With R ₃₀Contact on, the other end is connected on IC ₁₅In-phase input end and D ₆Negative terminal; R ₃₂One terminates on the autotransformer output line 3 end and R ₃₁Serial connection back and D ₅Negative terminal and D ₆Anode link to each other; DW ₃, DW ₄Be connected on positive source and R after the anti-phase series connection ₃₂And R ₃₁Contact on.

6, by the stable-pressure device of claim 1 or 2 regulations, it is characterized in that said buffering driver (5), constitute by digital integrated circuit.IC ₉～IC ₁₃Input end be connected on IC respectively ₁And IC ₅～IC ₈Output terminal on, IC ₁₄Input termination IC ₁₇Output terminal, its reference mark connects together, and takes over IC in zero trigger (6) ₁₅Output terminal, R is passed through in the output of impact damper respectively ₂₀～R ₂₅Receive the T in the selector (2) ₁～T ₆Control extremely go up.

7, by the stable-pressure device of claim 1 or 2 regulations, it is characterized in that said refrigerator protector, form outage delayed startup circuit, adopt bidirectional triode thyristor as control element by an integrated operational amplifier.R ₃₇, R ₃₈After the series connection, R ₃₇A termination power positive pole 5, R ₃₈Connect power cathode, R ₃₄One terminate at R ₃₇, R ₃₈Tie point on, another termination IC ₁₆In-phase input end; R ₃₅A termination IC ₁₆In-phase input end, the other end is connected on IC ₁₆Output terminal and IC ₁₇Input end join; D ₇Negative terminal meet on the positive source 5 positive termination C ₄Positive pole, R ₃₆With D ₇Parallel connection, C ₄Negative pole connect power cathode; R ₃₃One termination R ₃₆With C ₄Contact, a termination IC ₁₆Inverting input.

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