CN203658891U

CN203658891U - Contactless chopped voltage stabilizer

Info

Publication number: CN203658891U
Application number: CN201420016739.7U
Authority: CN
Inventors: 周格伊; 刘兵; 高青青; 黄小红
Original assignee: ZHEJIANG HEJI ELECTRICAL SCIENCE & TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG HEJI ELECTRICAL SCIENCE & TECHNOLOGY Co Ltd
Priority date: 2014-01-09
Filing date: 2014-01-09
Publication date: 2014-06-18
Anticipated expiration: 2024-01-09

Abstract

A contactless chopped voltage stabilizer comprises a compensation transformer T1, four insulated gate bipolar transistors (IGBTs), four silicon controlled rectifiers, a capacitor and an inductor. An input voltage live wire is connected with one end of the secondary side of the compensation transformer T1, the other end of the secondary side of the compensation transformer T1 is connected with a collector of an IGBT1 and connected with a stabilizing output terminal, the IGBT1 is connected with an IGBT2 in series, a collector of the IGBT2 is connected with the inductor L1 and a collector of the IGBT4, the other end of the inductor L1 is connected with one end of the capacitor C1, one end of a silicon controlled rectifier VS2 and one end of a silicon controlled rectifier VS4, the silicon controlled rectifier VS2 and a silicon controlled rectifier VS1 are connected in series, the silicon controlled rectifier VS4 and a silicon controlled rectifier VS3 are connected in series, middle points of two series connection circuits are connected with two ends of the primary side of the compensation transformer T1, the other ends of the silicon controlled rectifier VS1 and the silicon controlled rectifier VS3 are connected with a zero wire, the other end of the capacitor C1 is connected with the zero wire, an emitter of the IGBT4 is connected with an emitter of an IGBT3, and a collector of the IGBT3 is connected with the zero wire.

Description

Contactless voltage stabilizer of chopped mode

Technical field

The utility model relates to a kind of voltage stabilizer, refers in particular to a kind of voltage stabilizer that utilizes contactless wave chopping technology to realize voltage stabilizing control.

Background technology

The voltage regulation way of common voltage stabilizer has mainly adopted contact in the market, and as carbon brush pressure regulation or relay pressure regulation, these have the voltage regulation way of contact to have certain mechanical wear, have higher failure rate of machinery, therefore need periodic maintenance.Although also there is contactless control mode in market, utilize the tap changing of SCR control autotransformer to realize voltage stabilizing but common are, or change the voltage stabilizing whether compensation work realizes in circuit of multiple compensator transformers, this non-contact voltage stabilizer exists voltage stabilizing output discontinuous, there is the reason of ladder grade in bucking voltage, the object that can not reach high-precision voltage stabilizing output, special task equipment is to cisco unity malfunction in the situation of having relatively high expectations with work voltage accuracy.Also having in some inflammable and explosive occasions, as refuelling station etc., have the regulative mode of contact,, there is certain personal safety as well as the property safety hidden danger in the initiation fire of easily striking sparks.

Summary of the invention

The purpose of this utility model is the deficiency for existing voltage stabilizer technology, and a kind of non-contact voltage stabilizer is provided, and it adopts copped wave control technology to adjust bucking voltage value, has realized high-precision output voltage.

For achieving the above object, the utility model is achieved by the following technical solution: contactless voltage stabilizer of chopped mode comprises 1 compensator transformer T1, 4 IGBT, 4 controllable silicons, 1 electric capacity and 1 inductance, input voltage live wire connects one end of compensator transformer T1 secondary, the collector of another termination of compensator transformer T1 secondary IGBT1, and connect output end of pressure-stabilizing, IGBT1 and IGBT2 series connection, the collector of IGBT2 connects the collector of inductance L 1 and IGBT4, the other end of inductance L 1 connects respectively one end of capacitor C 1, controllable silicon VS2 one end, controllable silicon VS4 one end, controllable silicon VS2 and VS1 series connection, controllable silicon VS4 and VS3 series connection, the intermediate point of two series circuits connects respectively the two ends on the former limit of compensator transformer T1, another terminal connecting zero line of controllable silicon VS1 and VS3, another terminal connecting zero line of capacitor C 1, the emitter of IGBT4 connects the emitter of IGBT3, the collector connecting to neutral line of IGBT3.

4 IGBT are connected between the live wire and zero line of output voltage successively, and wherein IGBT1 and IGBT2 series connection in opposite directions, IGBT3 and IGBT4 connect in opposite directions; The duty of IGBT1 and IGBT2 is identical, and the duty of IGBT3 and IGBT4 is identical; And the in the situation that of IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 cut-off, in the situation of IGBT1 and IGBT2 cut-off, IGBT3 and IGBT4 conducting.Controllable silicon VS1 is identical with VS4 duty, and controllable silicon VS2 is identical with VS3 duty, and the in the situation that of controllable silicon VS1 and VS4 conducting, controllable silicon VS2 and VS3 cut-off, in the situation of controllable silicon VS1 and VS4 cut-off, controllable silicon VS2 and VS3 conducting.

In the time there is fluctuation in input voltage, by controlling the ON time of 4 IGBT, carry out the size of the original edge voltage of control and compensation transformer T1, by controlling 4 silicon controlled duties, carry out the direction of control and compensation transformer T1 original edge voltage, thereby obtain the size and Orientation of required compensation secondary voltage Δ U, realize stable output voltage.

Accompanying drawing explanation

Fig. 1 is the major loop schematic diagram of the present embodiment.

Embodiment

Below in conjunction with embodiment and accompanying drawing thereof, the utility model is remake to description.

Referring to Fig. 1, contactless voltage stabilizer of chopped mode, comprise 1 compensator transformer T1, 4 IGBT, 4 controllable silicons, 1 electric capacity and 1 inductance, input voltage live wire connects one end of compensator transformer T1 secondary, the collector of another termination IGBT1, and connect output end of pressure-stabilizing, the emitter of IGBT1 connects the emitter of IGBT2, the collector of IGBT2 connects one end of inductance L 1 and the collector of IGBT4, the other end of inductance L 1 connects respectively one end of capacitor C 1, controllable silicon VS2 one end, controllable silicon VS4 one end, the one end on another former limit of termination compensator transformer T1 of controllable silicon VS2 and one end of controllable silicon VS1, the other end on another former limit of termination compensator transformer T1 of controllable silicon VS4 and one end of controllable silicon VS3, another terminal connecting zero line of the other end of controllable silicon VS1 and VS3, another terminal connecting zero line of capacitor C 1, the emitter of IGBT4 connects the emitter of IGBT3, the collector connecting to neutral line of IGBT3.

Principle of work: the Same Name of Ends of compensator transformer T1 two windings, the in the situation that of the same side, in the time that input voltage is on the low side, is controlled IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 cut-off, controls controllable silicon VS2 and VS3 conducting, controllable silicon VS1 and VS4 cut-off simultaneously; Voltage is by IGBT1 and IGBT2, the one end through inductance L 1 and controllable silicon VS2 to the former limit of compensator transformer T1, then pass through VS3 by the other end on the former limit of compensator transformer T1 and get back to zero line and form a compensating circuit, realize output voltage U o=Ui+ Δ U; In the time that input voltage is higher, control IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 cut-off, control controllable silicon VS4 and VS1 conducting, controllable silicon VS2 and VS3 cut-off simultaneously; Voltage is by IGBT1 and IGBT2, the one end through inductance L 1 and controllable silicon VS4 to the former limit of compensator transformer T1, then pass through VS1 by the other end on the former limit of compensator transformer T1 and get back to zero line and form a compensating circuit, realize output voltage U o=Ui-Δ U; When input voltage is within the scope of the precision of voltage regulation, control IGBT1 and IGBT2 cut-off, IGBT3 and IGBT4 conducting, control controllable silicon VS2 and VS3 conducting, controllable silicon VS1 and VS4 cut-off simultaneously; The induced voltage on the former limit of compensator transformer T1 is got back to the other end on the former limit of compensator transformer T1 by controllable silicon VS2, inductance L 1, IGBT4, IGBT3 and controllable silicon VS3, form loop, the bucking voltage Δ U=0 of compensating circuit, output voltage U o=Ui.

Claims

1. contactless voltage stabilizer of chopped mode, it comprises 1 compensator transformer T1, 4 IGBT, 4 controllable silicons, 1 electric capacity and 1 inductance, it is characterized in that: input voltage live wire connects one end of compensator transformer T1 secondary, the collector of another termination IGBT1 of compensator transformer T1 secondary, and connect output end of pressure-stabilizing, IGBT1 and IGBT2 series connection, the collector of IGBT2 connects the collector of inductance L 1 and IGBT4, the other end of inductance L 1 connects respectively one end of capacitor C 1, controllable silicon VS2 one end, controllable silicon VS4 one end, controllable silicon VS2 and VS1 series connection, controllable silicon VS4 and VS3 series connection, the intermediate point of two series circuits connects respectively the two ends on the former limit of compensator transformer T1, another terminal connecting zero line of controllable silicon VS1 and VS3, another terminal connecting zero line of capacitor C 1, the emitter of IGBT4 connects the emitter of IGBT3, the collector connecting to neutral line of IGBT3.

2. contactless voltage stabilizer of chopped mode according to claim 1, is characterized in that: the duty of IGBT1 and IGBT2 is identical, and the duty of IGBT3 and IGBT4 is identical; And the in the situation that of IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 cut-off, in the situation of IGBT1 and IGBT2 cut-off, IGBT3 and IGBT4 conducting.

3. contactless voltage stabilizer of chopped mode according to claim 1, it is characterized in that: controllable silicon VS1 is identical with VS4 duty, controllable silicon VS2 is identical with VS3 duty, and the in the situation that of controllable silicon VS1 and VS4 conducting, controllable silicon VS2 and VS3 cut-off, in the situation of controllable silicon VS1 and VS4 cut-off, controllable silicon VS2 and VS3 conducting.