CN201994868U

CN201994868U - Improved 500W ozone high-voltage power supply

Info

Publication number: CN201994868U
Application number: CN201120075554XU
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: 2011-03-21
Filing date: 2011-03-21
Publication date: 2011-09-28
Anticipated expiration: 2021-03-21

Abstract

The utility model relates to a 500W ozone high-voltage power supply, which comprises an integral power box and a power circuit in the box. The power circuit comprises a control circuit, an over-temperature protection circuit, an input overvoltage protection circuit, a power supply circuit, a current feedback circuit and a drive and output circuit, wherein the control circuit is respectively connected with the current feedback circuit, the over-temperature protection circuit, the input overvoltage protection circuit, the power supply circuit and the drive and output circuit, the power supply circuit is connected with the drive and output circuit, and the drive and output circuit is connected with the current feedback circuit. The 500W ozone high-voltage power supply has the advantages that one original output transformer with large size and heavy weight is changed into two small-sized output transformers on the premise of ensuring the maximum power output, conversion efficiency is improved while integral size and weight are decreased, the adjustable range of output power (current) is widened, and adjustment is more flexible and convenient.

Description

Modified model 500W ozone high-voltage power supply

Technical field

The utility model relates to a kind of modified model 500W ozone high-voltage power supply that is widely used in fields such as sewage disposal in the environmental protection and drinking water disinfection, industrial oxidation, medical and health, food.

Background technology

In the former 500W ozone high-voltage power supply of our company design only with an output transformer, the volume of this transformer is big, weight is heavier and conversion efficiency is lower, the adjustable range of power output (electric current) is narrower simultaneously, more and more is not suitable for the constantly requirement of development of market.

Summary of the invention

In view of the problem that prior art exists, the modified model 500W ozone high-voltage power supply that the utility model provides that a kind of performance is stable more, complete machine weight and overall dimension reduce.

The utility model for achieving the above object, the technical scheme of being taked is: a kind of modified model 500W ozone high-voltage power supply, comprise the power circuit in power supply complete machine casing and the casing, described power circuit comprises control circuit, thermal-shutdown circuit, protection circuit against input over-voltage, power supply circuits, it is characterized in that: also comprise current feedback circuit, drive and output circuit, described control circuit respectively with current feedback circuit, thermal-shutdown circuit, protection circuit against input over-voltage, power supply circuits, drive and the output circuit connection, described power supply circuits are connected with driving and output circuit, and described driving and output circuit are connected with current feedback circuit;

Resistance R 26 is in parallel with capacitor C 15 in the described current feedback circuit, the negative pole of diode D4 connects the positive pole of diode D5, the negative pole of the negative pole of diode D5 and diode D7, the end of one end of resistance R 26 and voltage inhibition diode D8 links to each other and meets control ground GND, the negative pole of diode D6 connects the positive pole of diode D7 and the other end that voltage suppresses diode D8 respectively, the positive pole of diode D4 connects the positive pole of diode D6 respectively, one end of resistance R 27, the other end of resistance R 26, the other end of resistance R 27 connects the inverting input of control chip U5B and an end of resistance R 28 respectively, the in-phase input end of control chip U5B meets control ground GND by resistance R 38, the output of control chip U5B is the end of connecting resistance R29 respectively, one end of capacitor C 14, the other end of resistance R 28, the other end of the in-phase input end connecting resistance R29 of control chip U5A, the inverting input difference connecting resistance R39 of control chip U5A and an end of resistance R 40, one end of capacitor C 13, the inner voltage stabilizing feeder ear of another termination Vcc of resistance R 39,2 ends of another termination adjustable resistance W4 of resistance R 40,2 ends of adjustable resistance W4 link to each other with 3 ends, the 1 termination control ground GND of adjustable resistance W4, the output of control chip U5A is the end of connecting resistance R41 respectively, the other end of capacitor C 13, the end of the other end difference connecting resistance R42 of resistance R 41 and the base stage of triode T6, the other end of resistance R 42 links to each other with the emitter of triode T6 and meets control ground GND, the ground connection termination control ground GND of control chip U5A, the power supply side of control chip U5A meets inner voltage stabilizing feeder ear Vcc;

Resistance R 33 is in parallel with diode D9 in described driving and the output circuit, resistance R 34 is in parallel with diode D10, the negative pole of the secondary coil 3 terminating diode D9 of isolation drive transformer TRF4, the end of the positive pole difference connecting resistance R35 of diode D9 and the grid of fet T1, secondary coil 4 ends of isolation drive transformer TRF4 connect the source electrode of fet T1 respectively, the other end of resistance R 35, the drain electrode of fet T2,2 ends of output transformer TRF1 primary coil, 2 ends of output transformer TRF2 primary coil and an end of capacitor C 25, the drain electrode of fet T1 meets internal power feeder ear V1, the negative pole of the secondary coil 5 terminating diode D10 of isolation drive transformer TRF4, the end of the positive pole difference connecting resistance R36 of diode D10 and the grid of fet T2, secondary coil 6 ends of isolation drive transformer TRF4 connect the source electrode of fet T2 respectively, the other end of resistance R 36 and exchange thermally HG, capacitor C 21 is in parallel with capacitor C 22, capacitor C 23 is in parallel with capacitor C 24, one termination internal power feeder ear V1 of capacitor C 21, the other end of capacitor C 21 connects an end of capacitor C 23 respectively, one end of resistance R 37,1 end of output transformer TRF1 primary coil, 1 end of output transformer TRF2 primary coil, the other end of the other end connecting resistance R37 of capacitor C 25, another termination of capacitor C 23 exchanges thermally HG, 4 ends of 3 termination output transformer TRF2 secondary coils of output transformer TRF1 secondary coil, 3 termination high-voltage output end HV.out of output transformer TRF2 secondary coil, the negative pole of diode D4 in the 4 termination current feedback circuits of output transformer TRF1 secondary coil.

The beneficial effects of the utility model are: under the prerequisite that guarantees maximum power output, original volume is big and output transformer Heavy Weight becomes two small-sized output transformers, has both improved conversion efficiency, and the volume of complete machine, weight are reduced; The adjustable extent of power output (electric current) broadens, and regulates more flexible, convenient.

Description of drawings

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

Fig. 2 is the rearview 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, modified model 500W ozone high-voltage power supply, comprise the power circuit in power supply complete machine casing 1 and the casing, power circuit comprises control circuit, thermal-shutdown circuit, protection circuit against input over-voltage, power supply circuits, also comprise current feedback circuit, driving and output circuit, control circuit is connected with current feedback circuit, thermal-shutdown circuit, protection circuit against input over-voltage, power supply circuits, driving and output circuit respectively, described power supply circuits are connected with driving and output circuit, and driving and output circuit are connected with current feedback circuit;

Resistance R 26 is in parallel with capacitor C 15 in the current feedback circuit, the negative pole of diode D4 connects the positive pole of diode D5, the negative pole of the negative pole of diode D5 and diode D7, the end of one end of resistance R 26 and voltage inhibition diode D8 links to each other and meets control ground GND, the negative pole of diode D6 connects the positive pole of diode D7 and the other end that voltage suppresses diode D8 respectively, the positive pole of diode D4 connects the positive pole of diode D6 respectively, one end of resistance R 27, the other end of resistance R 26, the other end of resistance R 27 connects the inverting input of control chip U5B and an end of resistance R 28 respectively, the in-phase input end of control chip U5B meets control ground GND by resistance R 38, the output of control chip U5B is the end of connecting resistance R29 respectively, one end of capacitor C 14, the other end of resistance R 28, the other end of the in-phase input end connecting resistance R29 of control chip U5A, the inverting input difference connecting resistance R39 of control chip U5A and an end of resistance R 40, one end of capacitor C 13, the inner voltage stabilizing feeder ear of another termination Vcc of resistance R 39,2 ends of another termination adjustable resistance W4 of resistance R 40,2 ends of adjustable resistance W4 link to each other with 3 ends, the 1 termination control ground GND of adjustable resistance W4, the output of control chip U5A is the end of connecting resistance R41 respectively, the other end of capacitor C 13, the end of the other end difference connecting resistance R42 of resistance R 41 and the base stage of triode T6, the other end of resistance R 42 links to each other with the emitter of triode T6 and meets control ground GND, 8 pin (CSS) of control chip U1 in the collector electrode connection control circuit of triode T6, the ground connection termination control ground GND of control chip U5A, the power supply side of control chip U5A meets inner voltage stabilizing feeder ear Vcc;

11 pin (OUTA) of control chip U1 in the primary coil 1 termination control circuit of isolation drive transformer TRF4 in driving and the output circuit, 14 pin (OUTB) of control chip U1 in the primary coil 2 termination control circuits of isolation drive transformer TRF4, resistance R 33 is in parallel with diode D9, resistance R 34 is in parallel with diode D10, the negative pole of the secondary coil 3 terminating diode D9 of isolation drive transformer TRF4, the end of the positive pole difference connecting resistance R35 of diode D9 and the grid of fet T1, secondary coil 4 ends of isolation drive transformer TRF4 connect the source electrode of fet T1 respectively, the other end of resistance R 35, the drain electrode of fet T2,2 ends of output transformer TRF1 primary coil, 2 ends of output transformer TRF2 primary coil and an end of capacitor C 25, the drain electrode of fet T1 meets internal power feeder ear V1, the negative pole of the secondary coil 5 terminating diode D10 of isolation drive transformer TRF4, the end of the positive pole difference connecting resistance R36 of diode D10 and the grid of fet T2, secondary coil 6 ends of isolation drive transformer TRF4 connect the source electrode of fet T2 respectively, the other end of resistance R 36 and exchange thermally HG, capacitor C 21 is in parallel with capacitor C 22, capacitor C 23 is in parallel with capacitor C 24, one termination internal power feeder ear V1 of capacitor C 21, the other end of capacitor C 21 connects an end of capacitor C 23 respectively, one end of resistance R 37,1 end of output transformer TRF1 primary coil, 1 end of output transformer TRF2 primary coil, the other end of the other end connecting resistance R37 of capacitor C 25, another termination of capacitor C 23 exchanges thermally HG, 4 ends of 3 termination output transformer TRF2 secondary coils of output transformer TRF1 secondary coil, 3 termination high-voltage output end HV.out of output transformer TRF2 secondary coil, the negative pole of diode D4 in the 4 termination current feedback circuits of output transformer TRF1 secondary coil, high pressure output ground G connects the negative pole of diode D6 in the current feedback circuit.

The integrated control chip U1 of PWM is adopted in the core of power circuit, its operating frequency height, and operating voltage range is wide, and totem pillar export structure adopts isolating transformer and half-bridge drive circuit, through the dual output transformer output of the secondary series connection of elementary parallel connection.In addition, given by the output current in the current feedback circuit, the size of regulating output current is to change power output.Simultaneously, this circuit has the kinds of protect function, and is easy to use.

Select that low noise, low temperature float for use, the control chip of good stability and other components and parts; Reasonably the PCB layout designs is guaranteed control circuit and Alternating Current Power Supply and output isolation fully; At aspects such as transformer line pack arrangement technology, assembly technology and High-Voltage Insulation processing strict demand is arranged, guarantee the reliability and the stability of power supply long-term work.

Power supply complete machine casing 1 rear board is provided with high-voltage output end H.V.Out, high pressure output ground G, Alternating Current Power Supply input 6, and power supply complete machine casing 1 front panel is provided with input voltage display list 2, input current display list 3, alarm lamp 4 and power work switch 5.

Operation principle: power frequency civil power 220V is behind insurance BX and filter inductance L1, lead up to after full-wave bridge rectifier circuit BRIDGE1 and the filtering, power power supply as output circuit, another road obtains in-line power V2 and inner voltage stabilizing power supply Vcc by transformer TRF3, rectification circuit BRIDGE2 and voltage stabilizing chip U6.

The integrated control chip U1 of PWM is adopted in the core of control circuit, PWM oscillation pulse signal from its 11 pin (OUTA) and the output of 14 pin (OUTB) both-end, directly connect isolation drive transformer TRF4, this transformer can make secondary level shift, and control circuit and Alternating Current Power Supply are isolated.

In driving and output circuit, high-frequency impulse ripple from control circuit, the half-bridge drive circuit of forming by MOS pliotron T1 and T2, output transformer TRF1 and output transformer TRF2, capacitor C 21 and capacitor C 22 etc. by this transformer TRF4 couple drive, and through two output transformer TRF1 and TRF2 output high pressure.The leakage inductance generation resonance of load capacitance and two output transformer TRF1 and TRF2 produces peak-to-peak value and is several kilovolts quasi-sine-wave high pressure, is used to drive the device of producing ozone with corona discharge.

In thermal-shutdown circuit; when the power conversion device working temperature is too high; the temperature voltage signal that temperature sensor T5 gathers; by control chip U4A and U4B etc.; make triode T4 conducting, on the one hand with 2 pin of control chip U1 in the control circuit (+V) current potential drags down, and it is quit work; electric charge on the soft start timing capacitor of will starting shooting the on the other hand C6 bleeds off, and wait is restarted.

In protection circuit against input over-voltage; when the alternating supply voltage of input is too high; the input overvoltage signal V2 that gathers at the positive output end of rectification circuit BRIDGE2; by control chip U3A etc.; make triode T3 conducting; 8 pin (CSS) current potential of control chip U1 in the control circuit is dragged down, it is quit work.

In current feedback circuit, output current sampled signal through obtaining on resistance R 26 after the rectification is delivered to 3 pin (in-phase input end) of control chip U5A, by adjustable resistance W4 after amplifying, change the given of output current, thus control, adjusting output current or power output.

Claims

1. modified model 500W ozone high-voltage power supply, comprise the power circuit in power supply complete machine casing (1) and the casing, described power circuit comprises control circuit, thermal-shutdown circuit, protection circuit against input over-voltage, power supply circuits, it is characterized in that: also comprise current feedback circuit, drive and output circuit, described control circuit respectively with current feedback circuit, thermal-shutdown circuit, protection circuit against input over-voltage, power supply circuits, drive and the output circuit connection, described power supply circuits are connected with driving and output circuit, and described driving and output circuit are connected with current feedback circuit;

2. modified model 500W ozone high-voltage power supply according to claim 1, it is characterized in that: described power supply complete machine casing (1) rear board is provided with high-voltage output end H.V.Out, high pressure output ground G, Alternating Current Power Supply input (6), and power supply complete machine casing (1) front panel is provided with input voltage display list (2), input current display list (3), alarm lamp (4) and power work switch (5).