CN201935971U

CN201935971U - Voltage-second product tester

Info

Publication number: CN201935971U
Application number: CN201020686753XU
Authority: CN
Inventors: 杜建华; 赵兰; 王立伟; 李山; 彭政; 叶东东
Original assignee: Beijing Institute of Control Engineering
Current assignee: Beijing Institute of Control Engineering
Priority date: 2010-12-17
Filing date: 2010-12-17
Publication date: 2011-08-17
Anticipated expiration: 2020-12-17

Abstract

A voltage-second product tester comprises a circuit part and a box for placing the circuit, wherein the circuit part comprises a pulse trigger, a multi-gear regulating switch, a power switch, a surge current killer circuit. The pulse trigger comprises a trigger circuit, a control chip and a timing capacitor group. The input end of the trigger circuit is connected with a testing switch of the tester, the output end of the trigger circuit is connected with the trigger end of the control chip, the charge-discharge end of the control chip is connected with the timing capacitor group, the output end of the control chip is used as the output end of the pulse trigger and is connected with the control end of the power switch, the timing capacitor group can be adjusted through the multi-gear regulating switch, the output end of the power switch is connected with an external oscilloscope, and the input end of the power switch is connected with an external direct current power supply through a measured transformer, the surge current killer circuit and an incorrect-connection-proof circuit. The portable structure and the clear operation panel of the tester can increase inspection efficiency and testing efficiency of the tester in batch production. Each worker can finish measurements of at least ten transformers in each minute.

Description

A kind of weber the product tester

Technical field

The utility model relates to a kind of weber product tester, is applicable to the measurement to transformer weber product.

Background technology

Weber product (voltage-time) is the important indicator of transformer, is the product in pulse voltage amplitude and duration of pulse.Do not have the testing tool of specialty in the market temporarily, also not seeing has similar patent documentation, only has similar easily-testing instrument in testing laboratory.

GB/T 8554-1998 (electronics and communication facilities with transformer and inductor measuring method and test routine) has provided the schematic circuit that monopulse voltage-the time product is measured.The easily-testing instrument that exists in the testing laboratory is made according to this principle, but this light instrument exist go up that TV university electric current, trigger pulse are easily shaken, security is not high, inconvenient operation, the low inferior deficiency of production efficiency, limited it and only can be applied to the research and development of products stage of testing laboratory, can not be used for check and the test that transformer is produced in batches as specialty products.

The utility model content

Technology of the present utility model is dealt with problems and is: overcome the deficiency of existing easily-testing instrument, provide a kind of weber the product tester.Adopt this tester to realize to simple and reliable, the convenient safe test of transformer weber product.

Technical solution of the present utility model is:

A kind of weber the product tester, it is characterized in that: comprise circuit part and place the box body of circuit, wherein circuit part comprises: pulse trigger, many grades of by-pass cockes, power switch, surge current suppression circuit;

Pulse trigger comprises trigger circuit, control chip and timing capacitor group, and the input end of trigger circuit links to each other with the Test Switchboard of tester; The output terminal of trigger circuit links to each other with the trigger end of control chip; The charge-discharge end of control chip links to each other with the timing capacitor group; The output terminal of control chip links to each other with the control end of power switch as the output terminal of pulse trigger; The timing capacitor group can be regulated by many grades of by-pass cockes; The output of power switch links to each other with external oscillograph; The input end of power switch is by tested transformer, surge current suppression circuit and prevent that connecing circnit NOT links to each other with external direct current power supply.

Described trigger circuit are made up of bleeder resistance R3, differential capacitance C1, RC filtering, triode V1, pull-up resistor R2;

The end of differential capacitance C1 is the input end of trigger circuit; The other end of differential capacitance C1 links to each other with the input end of RC filtering; The output terminal of RC filtering links to each other with the base stage of triode V1; The collector of triode V1 links to each other with the trigger end of control chip, and links to each other with the control chip power end by pull-up resistor simultaneously.

Described timing capacitor group is made up of the electric capacity of 4 different appearance values, can link to each other with the charge-discharge end of control chip separately by many grades of by-pass cockes.

The power end of described control chip is by preventing that connecing circnit NOT links to each other with external direct current power supply; Describedly anti-connect circnit NOT and form by rectifier bridge.

The tested transformer that links to each other with the input end of described power switch also links to each other with the end of storage capacitor C9; The other end of storage capacitor C9 links to each other with the output terminal of power switch, but described storage capacitor C9 shunt voltage table also.

Described surge current suppression circuit comprises capacitor C 7, resistance R 5, resistance R 6 and switch V2; The source electrode of switch V2 is the input end of surge current suppression circuit; The drain electrode of switch V2 is the surge current suppression circuit output terminal, and capacitor C 7, resistance R 5 are connected in parallel on grid and the source electrode of switch V2; Resistance R 6 links to each other with the grid of switch V2.

The utility model compared with prior art beneficial effect is:

(1) the punishment circuit that adopts in the utility model pulse trigger has been realized reliably disappearing trembling, the shake of having avoided the mechanical botton switch to cause.

(2) employing of many grades of by-pass cockes and timing capacitor group has realized the adjustable continuously of pulse height, and four adjustable gears are respectively 100us, 1ms, 10ms, 100ms, thereby but flexible Application in the test of all kinds of transformers.

(3) inrush current limitation that powers on of utilizing surge current suppression circuit the high capacity energy-storage travelling wave tube can be caused arrives in the 2A, has avoided electric power polarity to connect the instrument failure that is instead caused, the security that improves weber product test operation greatly.

(4) the utility model portable structure and clear and intuitive guidance panel can improve the production efficiency of checking, testing when transformer is produced in batches, and everyone per minute can be finished the measurement of 10 transformers at least.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model circuit theory diagrams;

Fig. 3 is the utility model structure diagram.

Embodiment

Below just in conjunction with the accompanying drawings the utility model embodiment is described further.

Be illustrated in figure 1 as the utility model functional block diagram, can realize test the weber product.Weber product test needs to measure the voltage of tested primary winding and the electric current that flows through, and main function components is pulse trigger and power switch in the utility model.

Pulse trigger further comprises trigger circuit, control chip and timing capacitor group, can produce the pulse signal of different in width at the transformer of different frequency.The width of pulse signal can be regulated under the control of many grades of by-pass cockes by the timing capacitor group.

Power switch can convert pulse signal to output pulses, as the driving pulse of weber product test.The voltage of transformer to be measured can obtain by the voltage table that is parallel to high capacity storage capacitor two ends, and current signal can utilize external oscillograph to show, the curve by observation oscilloscope can obtain corresponding time value from 0 duration to the slope sudden change.Utilize time value and the magnitude of voltage (pulse voltage amplitude) on the voltage table to obtain the weber product of tested transformer mutually at convenience.

As shown in Figure 2, be the utility model circuit diagram.Pulse trigger is made up of trigger circuit, control chip and timing capacitor group.The input end of trigger circuit links to each other with the Test Switchboard of tester, and the output of trigger circuit links to each other with the trigger end of control chip, and the charge-discharge end of control chip links to each other with the timing capacitor group, and the timing capacitor group can be regulated by many grades of by-pass cockes.The input end of power switch is by tested transformer, surge current suppression circuit and prevent that connecing circnit NOT links to each other with external direct current power supply.

When test, the two ends of Test Switchboard are connected to 1 end and 2 ends of circuit; Oscillograph is connected in 9 ends and 10 ends of circuit; Tested transformer is connected in 11 ends and 12 ends of circuit; The adjustable end of many grades of by-pass cockes is 13～17 ends.External direct current power supply is connected to 3 ends, 4 ends and 7 ends, 8 ends of circuit, and wherein, 3 ends, 4 ends are the power input of pulse trigger; 7 ends, 8 ends are the power input of power switch.

The control chip of pulse trigger is made up of a slice 555.555 charge-discharge end DISCHG links to each other with the stiff end 17 of timing resistor R4, timing capacitor group; 555 trigger end TRIG links to each other with the output terminal of trigger circuit; 555 output terminal OUT links to each other with the control end of power switch by resistance R 10.In addition, 555 CVLOT end is by capacitor C 10 ground connection, and 555 RESET end links to each other with power end VCC.

The power end VCC of control chip links to each other with Test Switchboard 2 ends with anodal 3 ends of external direct current power supply by the anti-circnit NOT that connects, and the earth terminal GND of control chip is by preventing that connecing circnit NOT links to each other with external direct current power supply negative pole 4 ends.Describedly anti-connect circnit NOT and form by rectifier bridge.

Wherein above-mentioned, R10=10 Ω; C10=0.01uF.

Trigger circuit are made up of bleeder resistance R3, differential capacitance C1, RC filtering, triode V1, pull-up resistor R2.The end of differential capacitance C1 is the input end of trigger circuit, and links to each other with 1 end of Test Switchboard; The other end of differential capacitance C1 links to each other with the input end of RC filtering (comprising resistance R 1 and capacitor C 8); The output terminal of RC filtering links to each other with the base stage of triode V1; The collector of triode V1 links to each other with the trigger end TRIG of control chip, and links to each other with 555 power end VCC by pull-up resistor R2 simultaneously.

Wherein above-mentioned, R1=10k Ω; R2=20k Ω; R3=51k Ω; C1=0.001uF; C8=0.1uF; Triode V1 adopts 2N2222A.

The timing capacitor group is made up of 4 electric capacity, and 4 electric capacity (C2, C3, C4, C5) all have an end continuous with a

gear

13,14,15,16 of many grades of by-pass cockes respectively, the other end ground connection of 4 electric capacity.The stiff end of multi-gear switch is 17.

Wherein above-mentioned, C2=0.001uF; C3=0.01uF; C4=0.1uF; C5=1uF.Four capacitor C 2, C3, C4, C5 can produce 100us, 1ms, 10ms, 100ms width-pulse signal respectively by making up with timing resistor R4 (10k Ω).

Power switch is made up of the VMOS pipe, and the control end of power switch, input end and output terminal are respectively grid, drain electrode and the source electrode of VMOS pipe.The drain electrode of VMOS pipe links to each other with an end of tested transformer, and is parallel with diode D3 with protection VMOS pipe at tested transformer two ends; The external oscillograph of the source electrode of VMOS pipe also passes through resistance R 11 ground connection; Resistance in series R9 between the grid of VMOS pipe and source electrode.Wherein, resistance R 11 is used to gather the electric current of tested primary winding as the current sample noninductive resistance.

Wherein above-mentioned, R9=k Ω; R11=k Ω.Replenish numerical value

Surge current suppression circuit comprises capacitor C 7, resistance R 5, resistance R 6 and switch V2.Switch V2 realizes that by the VMOS pipe source electrode of VMOS pipe is the input end of surge current suppression circuit; The drain electrode of VMOS pipe is the surge current suppression circuit output terminal, and capacitor C 7, resistance R 5 are connected in parallel on grid and the source electrode of switch V2; Resistance R 6 links to each other with the grid of VMOS pipe.The source electrode of resistance R 6 and VMOS pipe is respectively by preventing that connecing circnit NOT links to each other with negative pole 8 ends with positive pole 7 ends of external impressed current.

Wherein above-mentioned, R5=k Ω; R6=k Ω; C7=uF; Replenish numerical value

Fig. 2, Fig. 3, Fig. 4, the utility model weber the product tester comprise base 4, top cover 1, support 15, guidance panel 5, circuit board 16, cable box 2, cable box 12, instrument cases 14, lock 10, hinge 17, handle 7; Base 4 is connected by lock 10, hinge 17 with top cover 1; Support 15 by screw retention at base 4, and base is divided into cable box 2, cable box 12, instrument cases 14, place the power lead that is connected with plug 3 in the cable box 2, place tested transformer testing line that is connected with plug 11 and the oscillograph p-wire that is connected with plug 13 in the cable box 12, place assistant products such as pen, test record form in the instrument cases 14; Guidance panel 5, circuit board 16 are installed in upper and lower two installed surfaces of support 15 respectively, and realize being electrically connected by cable; Guidance panel 5 comprises voltage display screen 8, burst length many grades of by-pass cockes 9, testing button 6, power lead attachment plug 3, tested transformer attachment plug 11, the oscillograph test pencil line attachment plug 13 that is applied to tested primary.

As shown in Figure 3, be this use new structure sketch.Weber, the product tester placed in the whole box body, and the Test Switchboard 11 in the circuit diagram links to each other with 6 ends in the circuit diagram, thereby can start test by Test Switchboard 11; The incoming end 12 of direct supply links to each other respectively at 3 in the circuit diagram, 4,7,8 ends; Voltage table 13 is connected in 5,6 ends of circuit; Tested transformer links to each other with 11,12 ends in the circuit diagram by the joint 14 on the box body panel; The joint 15 that oscillograph passed through on the box body panel links to each other with 9,10 ends in the circuit diagram; Many grades of rearrangeable switches 16 link to each other with timing capacitor group in the circuit diagram.

In addition, whole box body also has parts such as the storage compartment that can place instrument, the handle that is used to carry and box lock, has realized the portable mobile of weber product tester integral body.

The unexposed technology of the utility model belongs to general knowledge as well known to those skilled in the art.

Claims

One kind weber the product tester, it is characterized in that: comprise circuit part and place the box body of circuit, wherein circuit part comprises: pulse trigger, many grades of by-pass cockes, power switch, surge current suppression circuit;

Pulse trigger comprises trigger circuit, control chip and timing capacitor group, and the input end of trigger circuit links to each other with the Test Switchboard of tester; The output terminal of trigger circuit links to each other with the trigger end of control chip; The charge-discharge end of control chip links to each other with the timing capacitor group; The output terminal of control chip links to each other with the control end of power switch as the output terminal of pulse trigger; The timing capacitor group can be regulated by many grades of by-pass cockes; The output of power switch links to each other with external oscillograph; The input end of power switch is by tested transformer, surge current suppression circuit and prevent that connecing circnit NOT links to each other with external direct current power supply.
2. a kind of weber according to claim 1 the product tester, it is characterized in that: described trigger circuit are made up of bleeder resistance R3, differential capacitance C1, RC filtering, triode V1, pull-up resistor R2;

The end of differential capacitance C1 is the input end of trigger circuit; The other end of differential capacitance C1 links to each other with the input end of RC filtering; The output terminal of RC filtering links to each other with the base stage of triode V1; The collector of triode V1 links to each other with the trigger end of control chip, and links to each other with the control chip power end by pull-up resistor simultaneously.
3. a kind of weber according to claim 1 the product tester, it is characterized in that: described timing capacitor group is made up of the electric capacity of 4 different appearance values, can link to each other with the charge-discharge end of control chip separately by many grades of by-pass cockes.
According to claim 1 or 2 or 3 described a kind of weber the product tester, it is characterized in that the power end of described control chip connects circnit NOT and links to each other with external direct current power supply by anti-; Describedly anti-connect circnit NOT and form by rectifier bridge.
5. a kind of weber according to claim 1 the product tester, it is characterized in that the tested transformer that links to each other with the input end of described power switch also links to each other with the end of storage capacitor C9; The other end of storage capacitor C9 links to each other with the output terminal of power switch, but described storage capacitor C9 shunt voltage table also.
6. a kind of weber according to claim 1 the product tester, it is characterized in that described surge current suppression circuit comprises capacitor C 7, resistance R 5, resistance R 6 and switch V2; The source electrode of switch V2 is the input end of surge current suppression circuit; The drain electrode of switch V2 is the surge current suppression circuit output terminal, and capacitor C 7, resistance R 5 are connected in parallel on grid and the source electrode of switch V2; Resistance R 6 links to each other with the grid of switch V2.