CN104777866A

CN104777866A - Contactless chopper type voltage stabilizer

Info

Publication number: CN104777866A
Application number: CN201410012666.9A
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: 2015-07-15

Abstract

The invention relates to a contactless hopper type voltage stabilizer. The contactless hopper type voltage stabilizer comprises a compensation transformer T1, four IGBTs (Insulated Gate Bipolar Translators), four silicon controlled rectifiers, a capacitor and an inductor, wherein an input voltage live wire is connected with one end of a secondary side of the compensation transformer T1; the other end of the secondary side of the compensation transformer T1 is connected with an collector electrode of the IGBT1 and is connected with a steady voltage output terminal; the IGBT1 is connected with the IGBT2 in series; a collector electrode of the IGBT2 is connected with the inductor L1 and a collector electrode of the IGBT4; the other end of the inductor L1 is connected with one end of the capacitor C1, one end of the silicon controlled rectifier VS2 and one end of the silicon controlled rectifier VS4; the silicon controlled rectifier VS2 is connected with the silicon controlled rectifier VS1 in series; the silicon controlled rectifier VS4 is connected with the silicon controlled rectifier VS3 in series; an intermediate point of two series circuits is connected with both ends of a primary side of the compensation transformer T1; the other end of the silicon controlled rectifier VS1 and the other end of the silicon controlled rectifier VS3 are connected with a null wire; the other end of the capacitor C1 is connected with the null wire; an emitter electrode of the IGBT4 is connected with an emitter electrode of the IGBT3; a collector electrode of the IGBT3 is connected withthe null wire.

Description

Contactless voltage stabilizer of chopped mode

Technical field

The present invention relates to a kind of voltage stabilizer, refer in particular to a kind of voltage stabilizer utilizing 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 there is certain mechanical wear, have higher failure rate of machinery, therefore need periodic maintenance.Although also there is contactless control mode in market, but common are and utilize the tap changing of SCR control autotransformer to realize voltage stabilizing, or change multiple compensator transformer whether in circuit compensation work realize voltage stabilizing, there is voltage stabilizing and export discontinuous in this non-contact voltage stabilizer, there is the reason of ladder grade in bucking voltage, can not reach the object that high-precision voltage stabilizing exports, special task equipment is to cisco unity malfunction when requiring higher with work voltage accuracy.Also have in some inflammable and explosive occasions, as refuelling station etc., have the regulative mode of contact, initiation fire of easily striking sparks, there is certain personal safety as well as the property safety hidden danger.

Summary of the invention

The object of the invention is, for the deficiency of existing voltage stabilizer technology, to provide a kind of non-contact voltage stabilizer, it adopts chop control technological adjustment bucking voltage value, achieves high-precision output voltage.

For achieving the above object, the present invention is achieved through the following technical solutions: 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 IGBT1 of compensator transformer T1 secondary, and connect regulated voltage output terminals, IGBT1 and IGBT2 connects, the collector of IGBT2 connects the collector of inductance L 1 and IGBT4, the other end of inductance L 1 connects one end of electric capacity C1 respectively, controllable silicon VS2 one end, controllable silicon VS4 one end, controllable silicon VS2 and VS1 connects, controllable silicon VS4 and VS3 connects, the intermediate point of two series circuits connects the two ends on the former limit of compensator transformer T1 respectively, another terminal connecting zero line of controllable silicon VS1 and VS3, another terminal connecting zero line of electric capacity C1, 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 of output voltage and zero line successively, and wherein IGBT1 and IGBT2 connects in opposite directions, IGBT3 and IGBT4 connect in opposite directions; The duty of IGBT1 with IGBT2 is identical, and the duty of IGBT3 with IGBT4 is identical; And when IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 ends, when 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 when controllable silicon VS1 and VS4 conducting, controllable silicon VS2 and VS3 ends, when controllable silicon VS1 and VS4 ends, and controllable silicon VS2 and VS3 conducting.

When 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, come the direction of control and compensation transformer T1 original edge voltage, thus obtain the required size and Orientation compensating secondary voltage △ 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, description is remake to the present invention.

See 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 regulated voltage output terminals, 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 one end of electric capacity C1 respectively, controllable silicon VS2 one end, controllable silicon VS4 one end, the one end on the former limit of another termination compensator transformer T1 of controllable silicon VS2 and one end of controllable silicon VS1, the other end on the former limit of another termination compensator transformer T1 of controllable silicon VS4 and one end of controllable silicon VS3, the other end of controllable silicon VS1 and another terminal connecting zero line of VS3, another terminal connecting zero line of electric capacity C1, 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 winding is when the same side, and when input voltage is on the low side, control IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 end, controls controllable silicon VS2 simultaneously and VS3 conducting, controllable silicon VS1 and VS4 end; Voltage, by IGBT1 and IGBT2, through inductance L 1 and controllable silicon VS2 one end to the former limit of compensator transformer T1, then is got back to zero line by the other end on the former limit of compensator transformer T1 through VS3 and is formed a compensating circuit, achieve output voltage Uo=Ui+ △ U; When input voltage is higher, control IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 end, and control controllable silicon VS4 and VS1 conducting, controllable silicon VS2 and VS3 end simultaneously; Voltage, by IGBT1 and IGBT2, through inductance L 1 and controllable silicon VS4 one end to the former limit of compensator transformer T1, then is got back to zero line by the other end on the former limit of compensator transformer T1 through VS1 and is formed a compensating circuit, achieve output voltage Uo=Ui-△ U; When input voltage is within the scope of the precision of voltage regulation, control IGBT1 and IGBT2 ends, IGBT3 and IGBT4 conducting, and control controllable silicon VS2 and VS3 conducting, controllable silicon VS1 and VS4 end simultaneously; The induced voltage on the former limit of compensator transformer T1 gets 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 △ U=0 of compensating circuit, then output voltage Uo=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 regulated voltage output terminals, IGBT1 and IGBT2 connects, the collector of IGBT2 connects the collector of inductance L 1 and IGBT4, the other end of inductance L 1 connects one end of electric capacity C1 respectively, controllable silicon VS2 one end, controllable silicon VS4 one end, controllable silicon VS2 and VS1 connects, controllable silicon VS4 and VS3 connects, the intermediate point of two series circuits connects the two ends on the former limit of compensator transformer T1 respectively, another terminal connecting zero line of controllable silicon VS1 and VS3, another terminal connecting zero line of electric capacity C1, 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, it is characterized in that: the duty of IGBT1 with IGBT2 is identical, the duty of IGBT3 with IGBT4 is identical; And when IGBT1 and IGBT2 conducting, IGBT3 and IGBT4 ends, when 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 when controllable silicon VS1 and VS4 conducting, controllable silicon VS2 and VS3 ends, when controllable silicon VS1 and VS4 ends, controllable silicon VS2 and VS3 conducting.