SU789946A1 - Apparatus for measuring core magnetic induction flux increment - Google Patents

Description

one

The present invention relates to a technique for measuring the flux of magnetic induction and can be used, in particular, when measuring the parameters and characteristics of magnetic cores, multihole ferrite plates.

A known measure of the increment of flux of magnetic induction of cores by the method of pulsed readout, contains a program generator of magnetization reversal currents, the first output of which is connected to the excitation winding of the core, the second output is connected to the input of the key management unit, the first output of which is connected to the gating keys, one of which is normal open and connected to the output winding of the core under study, and the second is normally closed and connected to the common point of the meter, an integrating device that includes egrator, two analog memory element, a voltage doubler, and an adder, wherein the integrator input coupled to the analog input of the first memory element and the first input of the adder, input voltage doubler coupled to the output of the first analog element.

m, and the output of the voltage doubler is connected to the second input of the adder whose output is connected to the input of the second analog memory element,

5 wherein the control inputs of the analog memory elements are connected to the corresponding outputs of the key management unit, and the output of the second analog memory element is output

10 total devices and attached to a voltage meter

The disadvantages of this meter include the inability to directly measure the coercive

15 force test cores.

The purpose of the invention is to expand the functionality of the meter.

The goal is achieved by

20 that a device for measuring the flux increment of the magnetic induction of the cores, comprising a generator of a program of magnetization reversal currents, the first output of which is connected to the excitation winding of the core, and

the second output is the input of the key management unit, the first output of which is connected to the gating keys, one of which is normally open

30 and connected to the output winding of the core under study, and the second is normally closed and connected. A common point of the device, an integrating element, the first input of which connects KeVf to the output of gate keys, the second input to the second output of the key management unit, sequential connected voltage divider, analog memory element and reference element, as well as current pulse amplitude meter, wherein the input of the voltage divider is connected to the output of the integrating element and the second input of the comparison element, the control input of the analog memory element is connected to the third output of the key management unit, the output comparing element is connected to a control program vhodomteneratora remagnetizing currents to the first output of which is coupled the input current meter impulse amplitude.

The drawing shows a functional diagram of a magnetic flux increment meter.

A device for measuring the magnetic flux flux increment contains a generator of a magnetising current program, test core 2, a key management unit 3, strobe keys 4.5, an integrating element 6, a t-oka pulse amplitude meter 7, a voltage divider 8, an analog element 9 memory ti, item 10 comparison.

The device works as follows.

In the initial state, the key management unit 3 provides the voltage at the output of the integrating element b equal to zero. In the measurement mode, the generator 1 of the magnetising current program generates a program of current pulses with an amplitude that allows the magnetization reversal of the test core 2 along the limiting hysteresis loop. At the output winding of core 2, voltage pulses are induced, the volt-second areas of which are proportional to the flux of the magnetic induction and equal to 2F of the test core. The voltage at the output of the integrating element 6, proportional to this magnetic flux, is fed to the input of the voltage divider 8 and to one of the inputs of the comparison element 10. The voltage divider 8 provides the voltage division by 2, which is fed to the input of the analogue memory element 9. The latter, by a signal from the key management unit 3, stores this voltage and outputs the comparison element 10 to the input. Since the voltage supplied to the first input of the comparison element 10 exceeds the voltage from the analog memory element 9, the comparison element 10 generates a control signal to the input of the generator 1 of the magnetization reversal program. According to this signal, the generator 1 of the switching current generator 1 reduces the amplitude of the generated current pulses, the voltage at the output of the integrating element 6 decreases and is fed to the input of the comparison element 10. Depending on whether this voltage exceeds the value of the voltage coming from the analog memory element 9, and whether it is proportional to or less than the magnetic flux F, the comparison circuit generates a corresponding signal to the control input of the oscillating current generator 1. Then the cycle is repeated until the compared voltages are equal. The value recorded by the current pulse amplitude meter will be equal to the coercive force of the test core 2-H.

The introduction of a voltage divider, an analog memory element, a reference element, and a meter of amplitudes of current pulses allows one to directly measure the coercive force of the tested cores, which expands the functionality of the magnetic flux increment meter.

Formula

the invention

A device for measuring the increment of flux of magnetic induction of cores, containing a generator of a magnetising current program, the first output of which is connected to the excitation winding of the core, and the second output is connected to the input of the key management unit, the first output of which is connected to the gating keys, one of which is normally open and connected to the output winding of the core under study, and the second is normally closed and connected to the common point of the device, an intrinsic element, the first input of which is connected to the output is gated keys, the second input is with the all-out output of the key management unit, characterized in that, to expand the functionality of the meter, a voltage divider, an analog memory element and a comparison element, as well as a current pulse amplitude meter are introduced into it the input of the voltage divider is connected to the output of the integrating element and the second input of the comparison element, the control input of the analog memory element is connected to the third output of the key management unit, the output of the element Alignment is connected to a control input of the generator revised program magnetization-reversing currents to the first output of which is coupled the input current meter impulse amplitude.

Sources of information taken into account in the examination

1. USSR author's certificate according to the application 2669306/21.

Claims (1)

Claim A device for measuring the increment of the magnetic flux density of the cores, containing a generator of the program of magnetizing currents, the first output of which is connected to the excitation winding of the core, and the second output is connected to the input of the key control unit, the first output of which is connected to the gate keys, one of which is normally open and connected to the output winding of the core under study, and the second is normally closed and connected to a common point of the device, an integrating element, the first input of which is connected to the gate output beams, the second input - with the second output of the key management unit, characterized in that, in order to expand the meter’s functionality, a voltage divider, an analog memory element and a comparison element, are introduced in it, as well as a current pulse amplitude meter, the input being a voltage divider is connected to the output of the integrating element and the second input of the comparison element, the control input of the analog memory element is connected to the third output of the key management block, the output of the element 789946 and sake of compari- son is connected to the control input of oscillator transferred program magnetization-reversing currents to the first output of which is coupled the input current pulse amplitude meter.