CN86106945A

CN86106945A - Coil winding-direction tester

Info

Publication number: CN86106945A
Application number: CN86106945.5A
Authority: CN
Inventors: 梁建国
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-11-03
Filing date: 1986-11-03
Publication date: 1988-05-18
Also published as: CN1013308B

Abstract

Coil winding-direction tester is when still being constituted path when (comprising short circuit) by test coil, the oscillator vibration makes electric current variation in the coil, produce an alternating current magnetic flux through iron core, be coupled to by the primary winding on test coil and the iron core same with it, primary winding be connected into the shape of connecting by test coil, just as can be known by test coil and primary winding in the same way whether by detecting, the alternating voltage of two coils series connection back output is high and low.When being opened circuit by test coil, then alarm equipment alarm is represented to be opened circuit by test coil.

Description

The present invention relates to a kind of tester of measuring coil winding-direction.

In various electronic devices, household electrical appliance, many devices that all used by coil winding are arranged, televisor that is produced before in 1985 as China and the external televisor (mainly being meant black and white television set here) produced of some manufacturers, used horizontal equilibrium flyback transformer mostly adopts separate type, the horizontal equilibrium flyback transformer of this structure, if high-tension coil is out of order, can independently change, but high-tension coil is different because of manufacturer, during coiling, clockwise direction coiling and two kinds of windings of coiling counterclockwise can appear.When changeing high-tension coil, if new high-tension coil and old high-tension coil are around to inconsistent, just televisor can't be worked at all.Because of high-tension coil all is to handle through the insulation material seal, can't from the outward appearance body judge its around to, though the high-tension coil of the manufacturer production that has has around to mark, but often occur mark with actual around to situation about not being inconsistent, maintenance department and client Chang Yin bought mark with actual around incurring loss to the high-tension coil that is not inconsistent.Caused trouble and difficulty so just for the maintenance job of televisor and the sale of high-tension coil.Derwent company patent documentation to nineteen eighty-three in 1963 does not have the patent documentation identical with the present invention basically by retrieval.

The purpose of this invention is to provide a kind of instrument that can judge coil winding-direction accurately.It can to intact coil around to (maintenance department can utilize this instrument that large batch of coil winding-direction is differentiated) and to (the comprising short circuit) coil that still can constitute path around to differentiating, also can judge and whether open circuit by test coil.According to testing result, just can select the coil corresponding for use with it.

Coil winding-direction tester provided by the invention, its particularly suitable test TV set high-voltage coil is characterized in that it is by control module, around forming to test cell, breaking alarming unit, oscillator unit, primary winding, power supply.Accompanying drawing one is asked for an interview in the connection and the connection between the unit of each unit.Control module is mainly formed by the Darlington power amplifier with by the relay (J1), (J2), diode (D3) and the tested coil that are connected in series between transistor BG2 emitter and the ground together again after the parallel connection.Its effect mainly be judge whether normal by test coil, open circuit and according to the judged result decision whether to around providing working power to test cell and open circuit alarm unit.(J1) is the JRX-13F miniature relay, (J2) is the JRC subminiature relay, relay is when "on" position not, in (J1) (J1-11), (J1-12) and (J1-21), (J1-22) is normally open, (J1-11), (J1-13) and (J1-21), (J1-23) is normally off, in (J2) (J2-1), (J2-2) is normally open, (J2-1), (J2-3) is normally off, relay is when "on" position, the normal battle (J1-11) of relay (J1), (J1-12) and (J1-21), (J1-22) starts closed, the normal battle (J2-1) of (J2), (J2-2) starts closed, the normally closed point (J1-11) of relay (J1), (J1-13) and (J1-21), (J1-23) starts disconnection, the normally closed point (J2-1) of (J2), (J2-3) starts disconnection.Relay (J1) with (J2) each tie point connection in the line is: the two ends of (J1) and the pull-in winding of (J2) are connected with ground with the emitter of transistor BG2 respectively, (J1-11) with by (d) of test coil (LZ) point connect, (J1-21) with by (d) of test coil (LZ) point connect, (J1-12) connects with (b) point of primary winding (L4), (J1-22) connects with ground, (J1-13) and resistance R 27, R2, the collector of transistor BG1 and BG2, (f) point of button (AN) connects, the base stage of (J1-23) and transistor BG1, (J2-2) connects, (J2-1) connects with resistance R 27, (J2-2) and (J1-23), the base stage of transistor BG1 connects, and (J2-3) connects with resistance R 3.The working condition of control module is as follows: can constituted by test coil under the path situation of (comprising short circuit), closed button (moment of AN, transistor BG1 and BG2 collector obtain+12 volts of voltages, the base stage of transistor BG1 is by the normally closed point (J1-13) of relay (J1), (J1-11), by test coil (LZ), normally closed point (J1-21), (J1-23) obtains bias voltage, thereby make transistor BG1 and BG2 conducting, because the conducting of transistor BG1 and BG2, relay (J1) and (J2) are attracting state, make normally closed point (J1-11), (J1-13) starts disconnection, normally closed point (J1-21), (J1-23) starts disconnection, normally closed point (J2-1), (J2-3) starts disconnection, normal make war (J1-11), (J1-12) starts closed, make by (d) of test coil point and connect with (b) point of primary winding (L4), be the series connection form, normal make war (J1-21), (J1-22) starts closure to be made by (C) of test coil (LZ) point and ground connection, normal make war (J2-1), (J2-2) starts closed, + 12 volts of voltages are supplied with positive voltage of transistor BG1 base stage by resistance R 27, keep transistor BG1 and BG2 state of saturation, the E point voltage of transistor BG2 emitter is approaching+and 12 volts, mainly be to oscillator (FZ) with around a working power is provided to test cell.In press button (AN), breaking alarming unit also normally closed point (J2-1), (J2-3), the resistance R 3 by relay (J2) has obtained the voltage of approaching+12 volt, but because keep the ON time of the capacitor charge time of multi-harmonic-oscillations unit vibration greater than transistor BG1 and BG2, so when the oscillating condition of multivibrator does not also satisfy, normally closed point (J2-1), (J2-3) of relay (J2) start disconnection, alarm does not have operating voltage, so alarm is not worked.If by test coil (LZ) is off state (perhaps because misoperation is not had good place in circuit by test coil (LZ)), closed button, (AN), because of being off state by test coil (LZ), + 12 volts voltage can't be by being added to the base stage of transistor BG1 by test coil (LZ), make that transistor BG1 and BG2 are cut-off state, relay (J1) and (J2) are attracting state not, normal battle (J1-11) of relay (J1) then, (J1-12), normal make war (J1-21), (J1-22), the normal battle (J2-1) of relay (J2), (J2-2) still is normally open, the normally closed point (J1-11) of relay (J1), (J1-13), normally closed point (J1-21), (J1-23), the normally closed point (J2-1) of relay (J2), (J2-3) still is normally off, + 12 volts of voltages pass through the normally closed point (J2-1) of relay (J2), (J2-3), resistance R 3 provides the voltage of approaching+12 volt for the breaking alarming unit, make the breaking alarming unit enter alarm condition, be in cut-off state because of transistor BG1 and BG2 again, the current potential of transistor BG2 emitter E point is near 0 volt, makes oscillator and around being in off position to test cell.Around to test cell mainly by two-tube direct-coupled amplifier, single tube common-emitter amplifier, rectification circuit, Darlington power amplifier and be serially connected in transistor BG10 and BG11 utmost point electrode and power supply between relay (J3), light emitting diode (LED1) and (LED2), current-limiting resistance R26 form.The two ends of the pull-in winding of relay (J3) connect with the collector of working power and transistor BG11 respectively, the power supply of approaching+12 that (J3-1) and the E point of transistor BG2 emitter provide volt connects, (J3-2) connects with the positive pole of light emitting diode (LED2), (J3-3) connects with the positive pole of light emitting diode (LED1), and the negative pole of light emitting diode (LED1) and (LED2) all connects with current-limiting resistance R26.As follows around the working condition to test cell: its main effect is differentiated tested coil winding-direction still being constituted path by test coil when (comprising short circuit), wherein the number of turn of primary winding (adjustable) approximates by the number of turn of test coil.When by test coil and the same phase time of primary winding, press button (AN), the E point voltage of the transistor BG2 emitter in the control module is approaching+12 volts, supplies with around to test cell and oscillator as working power.The normal battle of relay (J1), (J1-11), (J1-12) start closed primary winding (L4) with by test coil for connecting, (a) of primary winding (L4) puts and by (C) of test coil (LZ) some alternating voltage output arranged just, through amplifying rectification, transistor BG10 and BG11 are in state of saturation, making relay (J3) is attracting state, (J3-1), (J3-2) starts closed, (J3-1), (J3-3) start disconnection, (LED2) is luminous for light emitting diode, indication by test coil (LZ) and primary winding (L4) be same around to.When by test coil and primary winding around when opposite, the normal battle (J1-11) of relay (J1), (J1-12) starts closed, primary winding (L4) with by test coil (LZ) for connecting, induced potential in primary winding (L4) with cancelled out each other by the induced potential of test coil (LZ), (a) of primary winding (L4) puts and do not had alternating voltage output between (c) of test coil (LZ) point, transistor BG10 and BG11 end, relay (J3) is the state of not picking up, normally closed point (J3-1), (J3-3) still is normally off, normal make war (J3-1), (J3-2) still is normally open, (LED1) is luminous for light emitting diode, indication by test coil (LZ) and primary winding (L4) around to opposite.The breaking alarming unit is mainly by multivibrator be serially connected in transistor DG3 collector and the light emitting diode of resistance R 5 (LED3), the light emitting diode (LED4) that is serially connected between transistor BG4 collector and the resistance R 6 are formed.The breaking alarming unit is when being off state by test coil (LZ), relay (J2) is attracting state not, + 12 volts of voltages are transported to the emitter of transistor BG3 and BG4 by normally closed point (J2-1), (J2-3) and the resistance R 3 of relay (J2), make the multivibrator vibration, light emitting diode (LED3) and (LED4) are alternately luminous, expression is open-circuit condition (perhaps because misoperation is not had place in circuit well by test coil) by test coil.Oscillator unit (FZ) is mainly formed (coil of oscillator comprises L1, L2, L3) by pusb pull oscilator.Oscillator unit is to around a frequency source is provided to test cell, the number of turn of the oscillator coil shown in Fig. 1 is that L1 is 320 circles, 160 circle place taps, L2 and L3 are 40 circles, frequency is 1000Hz, the frequency of oscillator unit can height can be low, but 1000Hz is preferable frequency, can avoid like this because various interference that the frequency height brings and because the interference of the low AC power 50Hz of frequency.Iron core (TX) diameter of the oscillator that embodiment Fig. 1 provides (FZ) is 10 millimeters, and this coil winding-direction tester can test window be 10 millimeters-30 millimeters a coil.Primary winding (L4) is adjustable (number of turn) examination coil, the main effect of primary winding is to produce induced potential by iron core (TX), as around differentiate to test cell by test coil (LZ) around to standard, the number of turn of primary winding (L4) is with being decided by the number of turn of test coil (LZ).The adjustable end (a) of primary winding (L4) connects with the positive pole of capacitor C 5, and the other end (b) connects with (J1-12) of relay (J1).Power supply mainly is made up of transformer and rectification circuit, exports+12 volts voltage.

The present invention has accuracy of judgement, simple in structure, volume is little, easy to operate advantage, through the test of inventor to the test of a hundreds of high-tension coil and the high-tension coil in maintenance process need changed, accuracy rate is 100%, uses this tester to increase work efficiency, convenient for maintaining work, reduce owing to can not accurately judge coil around to the unnecessary trouble and the loss of bringing for routine work, maintenance and sale.

One represented embodiment describes the present invention below in conjunction with accompanying drawing.

Fig. 1 is the basic circuit diagram that coil winding-direction tester of the present invention is preferentially selected embodiment for use.

The course of work of coil winding-direction tester is as follows: when still can be constituted path (comprising short circuit) by test coil, to be inserted on the iron core (TX) by test coil (LZ), to be cut into (c), (d) 2 points by the two ends of test coil again, (AN) presses button, a series of actions process of the control module of chatting through the front, transistor BG1 and BG2 conducting, enter state of saturation, the voltage of approaching+12 of the E point of transistor BG2 emitter output volt, supply oscillator (FZ) and around to test cell as working power.Oscillator (FZ) starting of oscillation this moment, in oscillatory process along with changing by the electric current in the oscillator coil (L1), corresponding generation alternating flux in the iron core (TX), will produce induced potential in primary winding (L4), relay (J1) in the control module is an attracting state at this moment, normal make war (J1-11), (J1-12) starts closed, primary winding (L4) is by (J1-11), (J1-12) with connected the normal battle (J1-21) of (J1) by test coil (LZ), (J1-22) starts closed by (c) of test coil (LZ) some warp (J1-21), (J1-22) ground connection.Because the number of turn of primary winding (L4) approximates by the number of turn of test coil (LZ), if this moment, two coils were in series aiding connection, then (a) and (c) just 2 alternating voltage output is arranged, this alternating voltage warp is around the capacitor C to test cell ₅Coupling, two-tube direct-coupled amplifier, the single tube common-emitter amplifier amplifies, after the rectification circuit rectification, send into the Darlington power amplifier and make transistor BG10 and BG11 conducting saturated, relay (J3) is an attracting state, its often make war (J3-1), (J3-2) start closed, normally closed point (J3-1), (J3-3) start disconnection, and (LED2) is luminous for light emitting diode, indication by test coil (LZ) and primary winding (L4) same around to.If by test coil (LZ) and primary winding (L4) around to opposite, induced potential in series connection back primary winding (L4) with cancelled out each other by the induced potential of test coil (LZ), (a) and (c) 2 do not have alternating voltage output, transistor BG10 and BG11 end, relay (J3) is attracting state not, (J3-1), (J3-3) still are normally off, (J3-1), (J3-2) still are normally open, (LED1) is luminous for light emitting diode, indication by test coil (LZ) and primary winding (L4) around to opposite.Resistance R 26 is the current-limiting resistance of light emitting diode (LED1) and (LED2).The resistance value of preferentially selecting for use in the coil winding-direction tester, electric capacity, transistor model, diode model are that embodiment is shown in Figure 1.

Claims

1, a kind of coil winding-direction tester, it is specially adapted to test the TV set high-voltage coil, it is characterized in that this instrument comprises: control module, around to test cell, breaking alarming unit, oscillator unit, primary winding, power supply.

2, tester according to claim 1, it is characterized in that control module is by the Darlington power amplifier, relay (J1) and (J2), diode (D3), tested coil is formed, two ends of relay (J1) and (J2) pull-in winding and diode (D3) and connect after, serial connection is gone between the emitter and ground of transistor BG2 together again, (J1-11) of its repeat circuit (J1) with by (d) of test coil (LZ) point connect, (J1-21) with by (c) of test coil (LZ) point be connected, (J1-12) connects with (b) point of primary winding (L4), (J1-22) connects with ground, (J1-13) and resistance R 27, R2, (f) point of button (AN), the collector of transistor BG1 and BG2 connects, the base stage of (J1-23) and transistor BG1, (J2-2) of relay (J2) connects, (J2-1) of relay (J2) connects with resistance R 27, the base stage of (J2-2) and transistor BG1, (J1-23) of relay (J1) connects, and (J2-3) connects with resistance L3.

3, tester according to claim 1 is characterized in that oscillator and around providing to the working power of the test cell E point by the transistor BG2 emitter in the control module.

4, tester according to claim 1 is characterized in that the number of turn of primary winding (L4) is adjustable, can be according to being decided by the number of turn of test coil (LZ).