B83

V.3 No 1	83
Several experiments studying dynamic magnetic field

4.3. Results of experimental study

The aim of this experiment was to study the amplitude U₂ and phase ₂ of the inductive emf in the single conducting probe, with respect to the probe location in the gap l, input phasing of the primary windings and voltage variation U_1c across the winding c from 0 to 5 V, with constant voltage across the winding a U_1a = 5 V . We conducted this study at the frequency 100 Hz.

The results of measurement of the amplitude of induced emf U₂ (in the units 10^² V) are presented in Table 3. Lilac background denotes the data yielded out of gap, i.e. when the probe, being at the level of core gap, exceeded the boundaries of gap. We picked these data exceptionally with the consultative purpose, to extrapolate the plots to the region without the ferromagnetic core, where the regularities would some change.

Table 3

l, mm	-20	-16	-12	-8	-4	0	4	8	12	16	20
U_1c, V	Aiding connection of primary windings
0	5,5	6,0	6,2	6,6	7,0	7,5	7,75	8,25	8,75	9,25	9,5
1	4,0	4,2	4,5	4,9	5,1	5,9	6,2	6,6	6,9	7,4	7,6
2	2,45	2,6	2,9	3,35	3,8	4,4	4,7	5,2	5,8	6,2	6,5
3	1,4	1,38	1,5	1,8	2,35	2,9	3,4	3,8	4,4	5,0	5,3
4	2,0	1,9	1,3	0,78	0,9	1,3	2,0	2,5	3,2	3,9	4,2
5	3,3	3,0	2,45	1,6	0,9	0	0,75	1,5	2,25	3,0	3,35
	Anti-phase connection of primary windings
0	5,9	6,0	6,2	6,6	7,0	7,5	7,75	8,25	8,75	9.25	9,5
1	8,0	8,25	8,5	8,75	9,0	9,25	9,5	9,75	10,0	10,35	10,25
2	9,75	9,75	10,0	10,5	10,75	11,0	11,0	11,25	11,5	11,5	11,75
3	11,5	11,75	12,0	12,25	12,5	12,5	12,5	12,75	12,75	13,0	13,0
4	13,5	13,75	13,75	14,0	14,0	14,0	14,0	14,25	14,25	14,25	14,5
5	15,25	15,25	15,25	15,25	15,25	15,25	15,25	15,25	15,25	15,35	15,35

The diagram U₂ (l, U_1c) plotted on the basis of data shown in Table 3 is presented in Fig. 19.

Fig. 19. The amplitude of emf U₂ induced in the probe (in the units 10^² V) with respect to the probe location in the gap l and voltage U_1c at the primary winding c