CN203911771U

CN203911771U - Voltage reduction AC voltage-stablizer without transformer

Info

Publication number: CN203911771U
Application number: CN201420078473.9U
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-02-19
Filing date: 2014-02-19
Publication date: 2014-10-29
Anticipated expiration: 2024-02-19

Abstract

A voltage reduction AC voltage-stablizer without transformers is provided. A single-phase voltage-stablizer comprises an inductance-capacitance filter circuit, a full-control bidirectional electronic switch, a half-control bidirectional electronic switch, and a control trigger circuit. The bidirectional full-control electronic switch includes rectifier diodes and full-control devices. The bidirectional half-control electronic switch includes two thyristors that are in parallel connection toward reverse directions. One bidirectional full-control electronic switch, one bidirectional half-control electronic switch and the trigger circuit form one single-phase chopped-control AC voltage regulator. Voltage reduction and voltage stabilization output can be achieved by automatically regulating on-off ratio signals of the two full-control devices of the bidirectional full-control electronic switch. A three-phase voltage-stablizer is formed by three single-phase voltage reduction and voltage stabilization voltage-stablizers without transformers, wherein the three single-phase voltage reduction and voltage stabilization voltage-stablizers are connected in a star-shaped manner. Compared with voltage reduction and voltage stabilization voltage-stablizers having power frequency iron core transformers and also with voltage reduction and voltage stabilization AC devices having high-frequency transformers, the voltage reduction AC voltage-stablizer without transformers has the advantages of simple circuit, small size, light weight and low cost, and exhibits great economic and social benefits.

Description

Transless step-down AC voltage regulator

One, technical field the utility model belongs to power technique fields, relates to single-phase and three-phase step-down AC voltage regulator.

Two, background technology at present extremely wide single, the three-phase step-down AC voltage regulator of application have power frequency autotransformer and high frequency transformer is single-phase and three-phase step-down pressurizer.They exist volume large, Heavy Weight, high in cost of production defect.The utility model proposes a kind of new transless and cut the step-down AC voltage regulator of control AC voltage adjusting.

Three. summary of the invention is of the present utility model has single-phase and three-phase two classes without transformation step-down AC voltage regulator.Single-phase transless step-down AC voltage regulator, formed by 2 inductance-capacitance filter, 1 half control bidirectional electronic switch and 1 full control bidirectional electronic switch and trigger control circuit thereof, automatically regulate the make-to-break ratio of 2 full control device control signals in full control bidirectional electronic switch, just reach and regulate step-down voltage size, reach the stable object of output AC voltage step-down.Three-phase transless step-down AC voltage regulator, is made up of the single-phase step-down AC voltage regulator of transless of 3 Y-connections, regulates the make-to-break ratios of each 2 full control device control signal in mutually simultaneously, reaches the stable object of three-phase output voltage.

The single-phase step-down AC voltage regulator of transless, it is by filter inductance (L1, L2), filter capacitor (C1, C2), two-way full control electronic switch (S1), two-way half control electronic switch (S2) and control triggering electric circuit composition thereof, two-way full control electronic switch (S1) is made up of 2 full control devices and 2 rectifying tubes, two-way half control electronic switch (S2) is made up of the thyristor of two reverse parallel connections, it is characterized in that: single-phase step-down AC voltage regulator has an input, output common port (2), another ac input end (1) connects filter inductance (L1), or do not have filter inductance (L1) to be directly connected with two-way full control electronic switch (S1) one end (3), inductance (L1) other end (3) and filter capacitor (C1), two-way full control electronic switch (S1) 3 of one end connection, the other end (4) of two-way full control electronic switch (S1) and filter inductance (L2), two-way half control electronic switch (S2) 3 of one end connection, filter inductance (L2) other end is connected with lowering and stabilizing blood pressure output (5), 2 filter capacitor (C1, C2) the other end, the other end of two-way half control electronic switch (S2) and AC power input, output common port (2) connects.Three-phase transless step-down AC voltage regulator is made up of the single-phase transless step-down AC voltage regulator of 3 Y-connections.When single-phase and three-phase transless step-down AC voltage regulator is used for street lamp, the control signal of 2 the full control devices (V1, V2) in full control electronic switch (S1), can increase time control variables, the different time periods requires to have different reduced output voltage magnitudes of voltage, while thering is no control signal, output voltage is just zero.Contributing consumption does not just have yet, and therefore, is called street lamp intelligent energy-saving pressurizer.

Core technology of the present utility model is the cutting control AC voltage adjusting circuit of the same inventor's invention of application; cancel high frequency transformer; cut control output voltage and directly obtain required ac buck voltage stabilizing or pressure regulation voltage through LC (L2, C2) filtering; therefore; manufacturer is for saving cost; do not input the single-phase and three-phase transless step-down AC voltage regulator of two ends LC (L1, C1) filter filter, be also belong to the design's protection range within.

Four, appended drawings 1 is single-phase transless step-down AC voltage regulator main circuit schematic diagram of the present utility model, astable alternating voltage U12, by autotransformer (1) and the input of (2) end, stabilized single phase voltage U 52 is exported by (5) and (2).Accompanying drawing 2 is the new three-phase transless step-down AC voltage regulator main circuit schematic diagrams of this practicality, and it is made up of the single-phase transless step-down AC voltage regulator shown in 3 accompanying drawings 1.

Five, specific implementation method is from the main device schematic diagram of the single-phase transless step-down stream stabilized voltage power supply of accompanying drawing 1, and two-way full control electronic switch S1 is that control switch is cut in master control, and two-way half control electronic switch S2 is afterflow electronic switch.In the time of full control device V1 and the full conducting of V2, the voltage U 12 at input two ends (1,2) just equals to export two ends (5,2) U52 voltage, in the time of full control device V1 and V2 contract fully, no matter input two ends (1,2) voltage U 12 is how many, output two ends (5,2) U52 voltage is all zero.In the time that the control utmost point of full control device V1 and V2 has pulsewidth to cut control signal, V3 is the continued flow tube of V1, and V4 is the continued flow tube of V2.Regulate V1 and V2 control signal make-to-break ratio, just the size of energy regulation output two ends (5,2) output voltage U 52.Go the control signal make-to-break ratio of controlling V1 and V2 just can reach the object of exporting two ends (5,2) voltage step-down voltage stabilizing output voltage signal negative feedback.Should particularly point out, the triggering signal of intergranular pipe 3 and V4 is required be: V3 has DC trigger signal in the whole positive half cycle of power supply, in power-half cycle, without DC trigger signal, V4 without DC trigger signal, and has DC trigger signal in the whole positive half cycle of power supply in whole power-half cycle.Like this as long as control V1 and V2 control signal just can realize the lowering and stabilizing blood pressure of output two ends (5,2) voltage and the object of open and close control.Increase time control parameter in control signal time, just can realize the auto-open-close of street lamp and by the time provide lowering and stabilizing blood pressure the object of requirement stable output voltage, to reach best power savings, Here it is, and knowing of intelligent road-lamp voltage-reducing and electricity-saving can single-phase transless step-down AC voltage regulator.

Three-phase transless ac buck pressurizer shown in accompanying drawing 2, it is by the single-phase transless ac buck pressurizer shown in 3 Fig. 1, the three-phase transless step-down AC voltage regulator forming by Y-connection mode, it is by 3 two-way full control electronic switches (S1A, S1B, S1C), 3 two-way half control electronic switches (S2A, S2B, S2C), 2 three-phase filter inductances, or 6 single-phase filter inductances, 6 filter capacitors, half controls and entirely control the trigger control circuit composition of device.Its operation principle is identical with single-phase transless step-down AC voltage regulator, astable three-phase alternating voltage UA1, UB1, UC1, inputted by three-phase and four-line (A1, B1, C1, N), three-phase alternating current output voltage U A2, UB2, UC2 that step-down is stable, three-phase and four-line (A2, B2, C2, N) output, it can stable output three-phase step-down alternating voltage, also can export 3 has the single-phase step-down of public zero curve to exchange burning voltages.

Transless step-down AC voltage regulator of the present utility model, owing to there is no power frequency appendiron core transformer, there is no high frequency transformer yet, there is the advantages such as circuit knot machine is simple, cost is low, volume is little, lightweight, therefore, after enforcement, there are larger economic benefit and social benefit, use especially for the street lamp voltage-reducing and electricity-saving of street lamp intelligent energy-saving control, know energy type street lamp transless step-down AC voltage regulator, there is the full benefit of very large economic benefit and society.

Claims

1. transless step-down AC voltage regulator, single-phase by filter inductance (L1, L2), filter capacitor (C1, C2), two-way full control electronic switch (S1), two-way half control electronic switch (S2) and control triggering electric circuit composition thereof, two-way full control electronic switch (S1) is made up of 2 full control devices and 2 rectifying tubes, two-way half control electronic switch (S2) is made up of the thyristor of two reverse parallel connections, it is characterized in that: single-phase step-down AC voltage regulator has an input, output common port (2), another ac input end (1) connects filter inductance (L1), or do not have filter inductance (L1) to be directly connected with two-way full control electronic switch (S1) one end (3), inductance (L1) other end (3) and filter capacitor (C1), two-way full control electronic switch (S1) 3 of one end connection, the other end (4) of two-way full control electronic switch (S1) and filter inductance (L2), two-way half control electronic switch (s2) 3 of one end connection, filter inductance (L2) other end is connected with lowering and stabilizing blood pressure output (5), 2 filter capacitor (C1, C2) the other end, the other end of two-way half control electronic switch (S2) and AC power input, output common port (2) connects, three-phase is made up of the single-phase transless step-down AC voltage regulator of 3 Y-connections.

2. transless step-down AC voltage regulator according to claim 1, is characterized in that: transless step-down AC voltage regulator is the single-phase transless step-down AC voltage regulator that a street lamp is used.

3. transless step-down AC voltage regulator according to claim 1, is characterized in that: transless step-down AC voltage regulator is the three-phase transless step-down AC voltage regulator that a street lamp is used.