CN201623629U

CN201623629U - Minitype high-pressure insulation V/V converter module

Info

Publication number: CN201623629U
Application number: CN2010201319473U
Authority: CN
Inventors: 刘云滨; 殷生鸣; 于亮
Original assignee: TIANJIN DONGWEN HIGH VOLTAGE POWER SUPPLY FACTORY
Current assignee: Tianjin Dongwen High Voltage Power Supply Plant
Priority date: 2010-03-16
Filing date: 2010-03-16
Publication date: 2010-11-03
Anticipated expiration: 2020-03-16

Abstract

The utility model relates to a minitype high-pressure insulation V/V converter module, including a high-pressure insulation converter circuit packaged in a housing, wherein the high-pressure insulation converter circuit is welded with several pins and includes a voltage-frequency changing circuit, an input auxiliary circuit, and a frequency-voltage changing circuit, the voltage-frequency changing circuit is connected with the frequency-voltage changing circuit, and the input auxiliary circuit is connected with the voltage-frequency changing circuit. The beneficial effects of the utility model are that total insulation transmission of analog data is implemented; the converter module has advantages of low power consumption, little temperature change, high conversion precision, good stability, small contour dimension, less weight, and easy PCB installation.

Description

Small high voltage isolated V/V converter module

The utility model relates to the small high voltage isolated V/V converter module of the aspects such as isolated controlling of a kind of isolation transmission that is widely used in analogue data, suspension high voltage source.

Background technology

The converter majority that occurs on the market is single V/F or F/V converter, it is mainly used in remote A/D or D/A conversion, along with development in science and technology, in the application of high voltage source, particularly aspect the adjusting control of suspension high pressure, ubiquity that volume is big, control precision is not high, response speed waits problem slowly.

Summary of the invention

In view of the deficiency that prior art exists, the utility model provides that a kind of volume is little, reliability and good stability, output linearity height, the fast small high voltage isolated V/V converter module of response speed.

The technical scheme that the utility model is taked for achieving the above object is: a kind of small high voltage isolated V/V converter module, comprise the high pressure isolated converter circuit that is encapsulated in the housing, be welded with several pins that draw on the high pressure isolated converter circuit, it is characterized in that: described high pressure isolated converter circuit comprises voltage-frequency conversion circuit, input auxiliary circuit, voltage to frequency translation circuit, described voltage-frequency conversion circuit is connected with the voltage to frequency translation circuit, and described input auxiliary circuit is connected with the voltage-frequency conversion circuit.

1 pin of control chip U1 links to each other with 6 pin in the described voltage-frequency conversion circuit, resistance R 6 is in parallel with capacitor C 4,1 pin of one termination control chip U1 of resistance R 6, the other end of resistance R 6 meets input ground G1 by resistance R 7,2 pin of control chip U1 link to each other with 4 pin of control chip U1 by resistance R 4 and meet input ground G1, the positive pole of capacitor C 1 meets input supply power voltage end+V1 respectively, 8 pin of control chip U1,1 pin of photoelectrical coupler U4 and an end of resistance R 3, the negative pole of capacitor C 1 meets input ground G1,2 pin of photoelectrical coupler U4 connect 3 pin of control chip U1 by resistance R 8,5 pin of control chip U1 connect an end of capacitor C 2 and the other end of resistance R 3 respectively, 7 pin of control chip U1 are connecting resistance R1 respectively, one end of resistance R 5 and capacitor C 3, the other end of resistance R 1 is an end and the applied signal voltage end Vi of connecting resistance R2 respectively, and the other end of resistance R 2 links to each other with the other end of capacitor C 2 and capacitor C 3 and meets input ground G1.

3 pin of control chip U5 meet input ground G1 in the described input auxiliary circuit, 2 pin of control chip U5 connect the positive pole of capacitor C 12, the negative pole of capacitor C 12 connects 4 pin of control chip U5, the 5 pin difference connecting resistance R22 of control chip U5 and an end of capacitor C 14, the other end of resistance R 22 connects the other end of resistance R 5 in the negative pole of an end, diode D1 of capacitor C 13 and the voltage-frequency conversion circuit respectively, and the positive pole of diode D1 links to each other with the other end of capacitor C 13 and capacitor C 14 and meets input ground G1.

3 pin of control chip U2 link to each other with 4 pin and meet output ground G2 in the described voltage to frequency translation circuit, the positive pole of capacitor C 11 meets output supply power voltage end+V2 respectively, 8 pin of control chip U2,4 pin of photoelectrical coupler U4, one end of resistance R 11 and resistance R 12, one end of resistance R 14 and resistance R 16 and resistance R 20, the negative pole of capacitor C 11 meets output ground G2, the other end of resistance R 20 connects an end of capacitor C 10 and 8 pin of amplifier U3A respectively, another termination output ground G2 of capacitor C 10,2 pin of control chip U2 meet output signal voltage adjustable side Wj by resistance R 17, resistance R 18 is in parallel with capacitor C 8, the 1 pin difference connecting resistance R18 of control chip U2 and an end of resistance R 19, the other end of resistance R 19 connects 3 pin of amplifier U3A and an end of capacitor C 9 respectively, the other end of the other end of resistance R 18 and capacitor C 9 connects and connects exports ground G2,1 pin of amplifier U3A links to each other with 2 pin and an end and the output signal voltage end Vo of connecting resistance R21, the other end of resistance R 21 links to each other with 4 pin of amplifier U3A and meets output ground G2,5 pin of control chip U2 connect an end of capacitor C 7 and the other end of resistance R 16 respectively, the end of the 7 pin difference connecting resistance R15 of control chip U2 and the other end of resistance R 14,6 pin of control chip U2 are the end of connecting resistance R13 respectively, one end of capacitor C 6 and the other end of resistance R 12, the other end of capacitor C 7 links to each other with the other end of resistance R 13 and resistance R 15 and meets output ground G2, the other end of the other end difference connecting resistance R11 of capacitor C 6 and the collector electrode of triode T1, resistance R 10 is in parallel with capacitor C 5, the base stage of one termination triode T1 of resistance R 10, the other end of resistance R 10 connects 3 pin of photoelectrical coupler U4 and an end of resistance R 9 respectively, and the other end of resistance R 9 links to each other with the emitter of triode T1 and meets output ground G2.

The beneficial effects of the utility model are: the isolation fully that realizes analogue data transmits; That low in energy consumption, temperature is floated is little, conversion accuracy is high, good stability; Overall dimension is little, and is in light weight, is easy to PCB and installs.

Description of drawings

Fig. 1 is a schematic diagram of the present utility model.

Fig. 2 is the upward view of Fig. 1.

Fig. 3 is that circuit of the present utility model connects block diagram.

Fig. 4 is circuit theory diagrams of the present utility model.

Embodiment

Shown in Fig. 1,2,3,4, small high voltage isolated V/V converter module, comprise the high pressure isolated converter circuit that is encapsulated in the housing 1, be welded with several pins 2 that draw on the high pressure isolated converter circuit, high pressure isolated converter circuit comprises voltage-frequency conversion circuit, input auxiliary circuit, voltage to frequency translation circuit, and the voltage-frequency conversion circuit is connected with voltage to frequency translation circuit and input auxiliary circuit respectively.

1 pin of control chip U1 links to each other with 6 pin in the voltage-frequency conversion circuit, resistance R 6 is in parallel with capacitor C 4,1 pin of one termination control chip U1 of resistance R 6, the other end of resistance R 6 meets input ground G1 by resistance R 7,2 pin of control chip U1 link to each other with 4 pin of control chip U1 by resistance R 4 and meet input ground G1, the positive pole of capacitor C 1 meets input supply power voltage end+V1 respectively, 8 pin of control chip U1,1 pin of photoelectrical coupler U4 and an end of resistance R 3, the negative pole of capacitor C 1 meets input ground G1,2 pin of photoelectrical coupler U4 connect 3 pin of control chip U1 by resistance R 8,5 pin of control chip U1 connect an end of capacitor C 2 and the other end of resistance R 3 respectively, 7 pin of control chip U1 are connecting resistance R1 respectively, one end of resistance R 5 and capacitor C 3, the other end of resistance R 1 is an end and the applied signal voltage end Vi of connecting resistance R2 respectively, and the other end of resistance R 2 links to each other with the other end of capacitor C 2 and capacitor C 3 and meets input ground G1.

3 pin of control chip U5 meet input ground G1 in the input auxiliary circuit, 2 pin of control chip U5 connect the positive pole of capacitor C 12, the negative pole of capacitor C 12 connects 4 pin of control chip U5, the 5 pin difference connecting resistance R22 of control chip U5 and an end of capacitor C 14, the other end of resistance R 22 connects the other end of resistance R 5 in the negative pole of an end, diode D1 of capacitor C 13 and the voltage-frequency conversion circuit respectively, and the positive pole of diode D1 links to each other with the other end of capacitor C 13 and capacitor C 14 and meets input ground G1.

3 pin of control chip U2 link to each other with 4 pin and meet output ground G2 in the voltage to frequency translation circuit, the positive pole of capacitor C 11 meets output supply power voltage end+V2 respectively, 8 pin of control chip U2,4 pin of photoelectrical coupler U4, one end of resistance R 11 and resistance R 12, one end of resistance R 14 and resistance R 16 and resistance R 20, the negative pole of capacitor C 11 meets output ground G2, the other end of resistance R 20 connects an end of capacitor C 10 and 8 pin of amplifier U3A respectively, another termination output ground G2 of capacitor C 10,2 pin of control chip U2 meet output signal voltage adjustable side Wj by resistance R 17, resistance R 18 is in parallel with capacitor C 8, the 1 pin difference connecting resistance R18 of control chip U2 and an end of resistance R 19, the other end of resistance R 19 connects 3 pin of amplifier U3A and an end of capacitor C 9 respectively, the other end of the other end of resistance R 18 and capacitor C 9 connects and connects exports ground G2,1 pin of amplifier U3A links to each other with 2 pin and an end and the output signal voltage end Vo of connecting resistance R21, the other end of resistance R 21 links to each other with 4 pin of amplifier U3A and meets output ground G2,5 pin of control chip U2 connect an end of capacitor C 7 and the other end of resistance R 16 respectively, the end of the 7 pin difference connecting resistance R15 of control chip U2 and the other end of resistance R 14,6 pin of control chip U2 are the end of connecting resistance R13 respectively, one end of capacitor C 6 and the other end of resistance R 12, the other end of capacitor C 7 links to each other with the other end of resistance R 13 and resistance R 15 and meets output ground G2, the other end of the other end difference connecting resistance R11 of capacitor C 6 and the collector electrode of triode T1, resistance R 10 is in parallel with capacitor C 5, the base stage of one termination triode T1 of resistance R 10, the other end of resistance R 10 connects 3 pin of photoelectrical coupler U4 and an end of resistance R 9 respectively, and the other end of resistance R 9 links to each other with the emitter of triode T1 and meets output ground G2.

Circuit adopts that wide dynamic range, nonlinear distortion are little, wide frequency range, conversion and control chip that the conversion precision is high, makes circuit structure simple, and control is convenient; Increase the input offset circuit, reduce the nonlinear distortion of V/V converter module output; Select that low noise, low temperature float, the components and parts of good stability for use, guarantee long-term reliability and stability; Rational PCB layout, the isolated insulation requirement between guaranteeing to import and export.

High voltage isolated V/V converter module adopts metal shell, and the user can connect input ground or output ground with housing according to actual operating position, and good electromagnetic shielding action can be arranged, and improves the antijamming capability of converter module.

Several pins 2 that draw are exposed to outside the housing 1, one side is three and draws pin 2, by input supply power voltage end+V1, applied signal voltage end Vi, input ground G1 sequence arrangement, opposite side is four and draws pin 2, by output supply power voltage end+V2, output signal voltage end Vo, output signal voltage adjustable side Wj, output ground G2 sequence arrangement.

Operation principle

In the voltage-frequency conversion circuit, 5 pin of control chip U1 are the time of internal timing comparator end to be set, and the length of timing depends on the product of resistance R 3 and capacitor C 2; Analog signal is imported from applied signal voltage end Vi, after the input filtering of resistance R 1 and capacitor C 3 compositions, be added to 7 pin of control chip U1, this pin is the in-phase end of chip internal input comparator, variation according to above-mentioned inner two comparator input terminal voltages, make the upset of their periodic control internal triggers, and export the square wave of certain frequency, and then drive photoelectrical coupler U4 at 3 pin of control chip U1.

In addition, be to improve the output transform precision, reduce nonlinear distortion, forms the input offset circuit, and be added to 7 pin of control chip U1, to offset the influence that input is lacked of proper care by resistance R 5 by control chip U5, capacitor C 12 etc.

In the voltage to frequency translation circuit, 5 pin of control chip U2 are the time of internal timing comparator end to be set, and the length of timing depends on the product of resistance R 16 and capacitor C 7; The pulse signal of isolating the certain frequency that sends from photoelectrical coupler U4, by triode T1 and the differential circuit formed through resistance R 12 and capacitor C 6, after spike that produces and the stack of the dividing potential drop of resistance R 12 and resistance R 13, be added to 6 pin of control chip U2, i.e. the end of oppisite phase of chip internal input comparator.Through each link control of chip internal, at 1 pin of control chip U2, promptly obtain the electric charge accumulation on the capacitor C 8, pulse frequency is high more, and the voltage on the capacitor C 8 is high more.The aanalogvoltage that obtains, the follower that constitutes through amplifier U3A again, the pulse signal of the certain frequency that isolation is sent finally reverts back the voltage identical with input analog voltage.

Claims

1. small high voltage isolated V/V converter module, comprise the high pressure isolated converter circuit that is encapsulated in the housing (1), be welded with several pins (2) that draw on the high pressure isolated converter circuit, it is characterized in that: described high pressure isolated converter circuit comprises voltage-frequency conversion circuit, input auxiliary circuit, voltage to frequency translation circuit, and described voltage-frequency conversion circuit is connected with voltage to frequency translation circuit and input auxiliary circuit respectively;

1 pin of control chip U1 links to each other with 6 pin in the described voltage-frequency conversion circuit, resistance R 6 is in parallel with capacitor C 4,1 pin of one termination control chip U1 of resistance R 6, the other end of resistance R 6 meets input ground G1 by resistance R 7,2 pin of control chip U1 link to each other with 4 pin of control chip U1 by resistance R 4 and meet input ground G1, the positive pole of capacitor C 1 meets input supply power voltage end+V1 respectively, 8 pin of control chip U1,1 pin of photoelectrical coupler U4 and an end of resistance R 3, the negative pole of capacitor C 1 meets input ground G1,2 pin of photoelectrical coupler U4 connect 3 pin of control chip U1 by resistance R 8,5 pin of control chip U1 connect an end of capacitor C 2 and the other end of resistance R 3 respectively, 7 pin of control chip U1 are connecting resistance R1 respectively, one end of resistance R 5 and capacitor C 3, the other end of resistance R 1 is an end and the applied signal voltage end Vi of connecting resistance R2 respectively, and the other end of resistance R 2 links to each other with the other end of capacitor C 2 and capacitor C 3 and meets input ground G1;

3 pin of control chip U5 meet input ground G1 in the described input auxiliary circuit, 2 pin of control chip U5 connect the positive pole of capacitor C 12, the negative pole of capacitor C 12 connects 4 pin of control chip U5, the 5 pin difference connecting resistance R22 of control chip U5 and an end of capacitor C 14, the other end of resistance R 22 connects the other end of resistance R 5 in the negative pole of an end, diode D1 of capacitor C 13 and the voltage-frequency conversion circuit respectively, and the positive pole of diode D1 links to each other with the other end of capacitor C 13 and capacitor C 14 and meets input ground G1;

2. small high voltage isolated V according to claim 1/V converter module, it is characterized in that: described several pins (2) that draw are exposed to outside the housing (1), one side is three and draws pin (2), by input supply power voltage end+V1, applied signal voltage end Vi, input ground G1 sequence arrangement, opposite side is four and draws pin (2), by output supply power voltage end+V2, output signal voltage end Vo, output signal voltage adjustable side Wj, output ground G2 sequence arrangement.