SU1721553A1 - Controller of correctness of making of soldered connections of outputs of multioutput electric winding - Google Patents

Abstract

The invention relates to electrical measuring equipment and can be used to control the correctness of the soldering of the leads of multiple-output electrical windings. The purpose of the invention is the expansion of the field of application due to the possibility of controlling multiwire electric windings, as well as speeding up the monitoring process by reducing the number of measurements. The goal is achieved by the fact that a galvanic isolation unit (coils 6, 7), serially connected signal generator 10, power amplifier 13 are inserted into a device containing terminals 1 ... 4 for connecting a test object. and an excitation coil 14, and the control unit contains three diodes 8, three ADCs 9 and a decoder 11. The advantage of this new device over the known ones is that when controlling a multiwire electrical winding in just one measurement cycle Option faulty soldering pins. 2 Il. V yo

Description

The invention relates to electrical measuring equipment and can be used to control the correctness of the soldering of electrical windings of transformers and magnetic heads having several leads.

The aim of the invention is to expand the field of application by gaining the ability to control electrical windings having several conclusions, as well as speeding up the control process by reducing the number of measurements.

Fig. 1 shows a diagram of the device (for the case of monitoring four electric windings; Fig. 2 shows timing diagrams of voltages at the output of a power amplifier and a signal generator.

The device contains terminals 1-4 for connecting the control object 5, three pairs of magneto-coupled coils 6.7 inductance, three diodes 8, three analog-to-digital converters (ADC) 9, signal generator 10, decoder 11, indicator 12, amplifier 13 power and excitation coil 14, the adjacent terminals 1-4 are connected via inductors 6, the first leads of inductors 7 are connected to a common bus, the second ones are connected through series-connected diode 8 and ADC 9 are connected to the corresponding plug VI

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the formation input of the decoder 11, the synchronization input of which is connected to the output of the signal generator 10 and the input of the power amplifier 13, to the outputs of which the exciter coil 14 is connected, the outputs of the decoder 11 are connected to the corresponding inputs of the display unit 12.

The device works as follows.

From the signal generator 10, a signal is supplied to a power amplifier 13, which feeds the excitation coil 14, near which a sinusoidal alternating magnetic field arises, which induces an induced voltage in the controlled electrical winding (object 5). Depending on the wiring variant of the electric winding, with respect to terminals 1, 2.3 and 4, a voltage appears between them with different polarity and amplitude, for example, if the electric winding is decayed, as shown in figure 1, the voltage between pairs of terminals 1-2, 2-3 and 3-4 will have the same polarity and amplitude. A controlled winding of 5 terminals connects to terminals 1, 2, 3 and 4, which are connected to inductance coils 6 that have the same parameters. A current will flow through these coils, which will create an alternating magnetic field around them, the polarity and amplitude of which will correspond to that pair terminals 1, 2, 3, and 4, to which a specific coil is connected.

The inductance coils 7 are magnetically coupled to the coils 6, so voltage is applied to them, which through diodes 8 goes to the inputs of analog-to-digital converters (ADCs) 9. Diodes 8 pass only one of the induced half-waves, therefore at the inputs of the ADC 9 There is a voltage of one polarity, which they convert into a digital form suitable for the operation of the decoder 11, whose information inputs are connected to the outputs of the A / D converter 9. The signal generator 10 controls the operation of the decoder 11. Applying a voltage pulse to the input C is allowed and work. This is necessary because the polarity of the induced voltage changes during the period of change of the magnetic field of the excitation coil 14, therefore, in order to obtain an unambiguous picture of the voltage induced between the terminals of the controlled electric winding, it is necessary for the decoder 11 to work for a period of time equal to one of the half-waves of the induced voltage, which makes it possible to avoid uncertainty during the control.

From the diagrams (see FIG. 2) it can be seen that the enable signal of the operation of the decoder (U2) is fed to the input C of the decoder only during one half wave of induced voltage, i.e. uncertainty eliminated. The decoder 11 controls the inclusion of the indicators of the unit 12, the inclusion of which is judged on the correctness of the soldering.

If the wiring pins electric winding

5 is correct, then the inputs of the decoder 11 are fed from the outputs of the ADC 9 information indicating that the polarity and amplitude of the voltage induced between the pairs of terminals 1-2, 2-3 and 3-4 correspond to

the correct variant of the desoldering, and the decoder 11 will turn on, at the same time, the corresponding indicator of the display unit 12.

If the terminals of the electric winding are split differently, then between pairs of terminals 1-2,2-3

and 3-4 in Vits voltage, different in polarity and amplitude from the voltage corresponding to the correct wiring. These voltages are fed to the ADC 9, then to the decoder 11, which includes the corresponding

A related indicator that signals a variant of the desoldering of the terminals of a controlled electric winding.

Thus, this device in the control of multiwire electrical winding

In just one measurement cycle, it is possible to reveal not only the fact of erroneous decoupling, but also a specific variant of erroneous decoupling, which reduces the time required to eliminate the error.

The formula was invented by a device for controlling the correctness of the wiring of the leads of a multi-output electric winding, containing terminals for connecting the test object, the control unit and the display unit connected in series, characterized in that, in order to expand the field of application and speed up the control process, a block was inserted into it

galvanic isolation, serially connected signal generator, power amplifier and excitation coil, with N terminals for connecting the test object connected to the corresponding N

the inputs of the galvanic isolation unit, the first N-1 outputs of which are connected to the common bus, and the second N-1 outputs - with the corresponding N-1 inputs of the control unit, the synchronization input C of which is connected to the output of the signal generator, the galvanic isolation unit contains N -1 a pair of magnetically connected inductors, the first inductance of each pair connecting two adjacent inputs of the galvanic isolation unit, the second

the inductor of each pair connects the same first and second outputs of the galvanic isolation unit, the control unit contains N-1 diodes, N-1 analog-to-digital converters and a decoder, the outputs of which are connected to

the outputs of the control unit, and each of the N-1 inputs through a corresponding analog-to-digital converter with the cathode of the corresponding diode, the anode of which is connected to the corresponding input of the control unit.

Claims (1)

Claim A device for monitoring the correct wiring of the conclusions of a multi-output electrical winding, containing terminals for connecting the test object, a control unit and an indication unit connected in series, characterized in that, in order to expand the scope and speed up the control process, a galvanic isolation unit, a signal generator connected in series , a power amplifier and an excitation coil, and N terminals for connecting the monitoring object are connected to the corresponding N inputs of the galvanic isolation unit ki, the first N-1 outputs of which are connected to the common bus, and the second N-1 outputs - with the corresponding N-1 inputs of the control unit, the synchronization input of which is connected to the output of the signal generator, the galvanic isolation unit contains N-1 pair of magnetically connected inductors moreover, the first inductor of each pair connects two adjacent inputs of the galvanic isolation unit, the second inductor of each pair connects the same first and second outputs of the galvanic isolation unit, the control unit contains N-1 diodes, N-1 nalogo-digital converters and deshifra- 5 Torr, the outputs of which are connected to the outputs of the control unit and each of N-1 input through an appropriate analog-converter - from the corresponding cathode of the diode, the anode of which is connected to the corresponding input of the control unit. M fl Fig! Editor A. Zrobok% d. 2