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Mutual inductor

A technology of transformer and primary coil, applied in the field of changing devices, can solve the problems of heating of the primary coil, inaccurate measurement of mutual inductance, etc.

Inactive Publication Date: 2005-09-14
骆乃光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the output voltage of the auto-coupling voltage regulator has to be increased, and the problem brought about is that the primary coil heats up.
Moreover, it is necessary to know the influence of the distance between the two coils on the mutual inductance. Since there is no scale on the device, it is impossible to measure the influence of the distance between the two coils on the mutual inductance.
Let the two coils be one large and one small, and the small coil can extend into the transformer of the axis of the large coil skeleton because there is no manufacturer to produce it.

Method used

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Experimental program
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Embodiment Construction

[0011] exist figure 1 Medium. The mains power is stepped down through the socket 1 and the transformer 2. After passing through the rectifier circuit 10 and the filter capacitor 11, the three-terminal integrated voltage stabilizer 7818 is used to stabilize the voltage at 18 volts to supply power to the 555 time base circuit. The capacitor C 3 Generally, 0.1uF is used to improve the instantaneous response of the load; the capacitor C between the 5th pin of the 555 time base circuit and the ground 2 Used to bypass power supply noise and ripple, R 1 It is an adjustable resistor, which is used to change the output frequency of the time base circuit, and the output frequency is controlled by R 1 , R 2 and C 1 According to the decision, the output of the third pin of the time base circuit is a square wave. Since this experiment has no requirements for the waveform, and the square wave output voltage is the highest, the square wave should be used for the experiment. The above circ...

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Abstract

A mutual-inductor, exhibiting two coils mutual inductance changes by changes of positions in electrical experiments of higher educational institutions, mainly used for reducing commercial power voltage by a transformer. After commutating filtration, it is used as a 555 time-base integrated circuit power, of which the output alternating voltage feeds power to the primary coil, and then the secondary coil linkages at the axial center of the primary coil; by adjusting the distance of the two coils by a screw fixed to the secondary coil, and observing a voltmeter and a milliammeter connected to the secondary coil, it shows the effect of the distance changing on producing induced voltage and current.

Description

technical field [0001] The invention relates to a device for displaying the change of induced voltage through the change of the distance between two coils. Background technique [0002] At present, the mutual induction experiment in colleges and universities is done like this: connect the mains power to the output terminal of the autotransformer in parallel with the voltmeter and the primary coil of the mutual inductance; connect the two ends of the secondary coil in parallel with the voltmeter and then connect the ammeter and the load in series. Since the two coils use the same size bobbin, the induced voltage is not high when the two coils are closest to each other, and the voltage of the secondary coil will not be displayed if the distance is slightly apart. For this reason, the output voltage of the autotransformer has to be increased, which brings about the heating of the primary coil. Moreover, it is necessary to know the influence of the dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/00G09B23/18H01F38/20
Inventor 骆乃光
Owner 骆乃光