Simulation of a linear oscillating tubular motor

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
e-ISSN: 2278-1676,p-ISSN: 2320-3331, Volume 10, Issue 1 Ver. I (Jan – Feb. 2015), PP 29-34
www.iosrjournals.org
DOI: 10.9790/1676-10112934 www.iosrjournals.org 29 | Page
Simulation of a linear oscillating tubular motor
Dr. Mazouz Azeddine1
, Dr. Hedjazi Djemai1
1
(Department of electrical Engineering University of Batna ALGERIA)
Abstract: Still continuing our study of tubular linear oscillation motors (LOTM), the work presented in this
paper shows a simulation of a tubular linear motor oscillating, the latter is that a coil iron nucleus C.I.N.C.
Determining the inductance of the coil turns the model in mathematical equations that govern the operation of
(LOTM) in order to know the performance of the motor. Note that it is very difficult to calculate the inductance
of such a motor type by classical methods because the coil is magnetically saturated is to say the system is not
linear, so the necessity of use computer tools.
Key words: linear motor; Ferro-resonance, oscillating motor, inductance, coil.
I. Introduction:
The linear oscillating tubular motor consists of an iron bar moving inside a coil [8], figure 1.
The displacement of the nucleus in direct-reverse movement can lead to a Ferro resonance phenomena
which affect all the circuit parameters; hence it is called parametrical motor. This type of motor which is based
on the inductance periodical variation operating in linear oscillating regime leads to a change in the behaviour of
the electrical circuit. This behaviour is accompanied with electromechanical phenomena which make the
mathematical approach and simulation delicate [9].
Its operating particularity needs an adequate conception of a starting circuit as well as another circuit
for breaking. They need to understand that the Starter motor requires manual pulse, and when we want to stop
the motor by turning off the power, the nucleus is ejected outwards as a pitcher. So two solutions are possible to
solve these two important problems and we propose:
1 – Strengthen the two ends of the coil turns (of Excitation winding) for the motor starts easily figure 2.
2. a– The nucleus must be held by two springs at both ends figure 3.
2.b – Put a capacity parallel with the motor so that the kernel not eject in the area figure3.
Figure1. Linear oscillating tubular motor
Figure 2. Reinforcement of both ends of the coil windings Exciter
Figure 3 LOTM with return springs and the ability to stop by electrical damping

II. Setting Of The Equation LOTM
LMTO inductance L is a function of displacement [1] is given by the following formulas:
0 2.fL L L M   (1)
With:
fLLkM .0 (2)
And,
 flls
l
N
µls
l
N
µL  0000
2
00
²
²
.
²
. (3)
ffff lsµs
l
N
µL ])1(.[
²
. 0
2
0  (4)
L0: inductance of the coil without iron nucleus.
Lf: inductance of the nucleus.
And we know that the magnetic force is the derivative of the magnetic energy [1], and it is magnetic force that
causes the oscillation of the nucleus:
Fm =
dw
dt
(5)
As magnetic energy is defined by the following formula [2]:
w =
1
2
L0i1
2
+
1
2
Lfi2
2
+ Mi1i2 (6)
Therefore, the magnetic force will be equal to:
Fm =
1
2
dL0
dt
i1
2
+
1
2
dLf
dt
i2
2
+
dM
dt
i1i2 (7)
And even:
Fm =
1
2
dL0
dx
dx
dt
i1
2
+
1
2
dLf
dx
dx
dt
i2
2
+
dM
dt
i1i2 (8)
On the other we have:
dx
dt
= v (9)
With v: the speed of the nucleus
So :
Fm =
1
2
dL0
dx
v. i1
2
+
1
2
dLf
dx
v . i2
2
+
dM
dt
i1i2 (10)
Determining the speed V will be after the resolution of the mechanical equation that governs the functioning of
LOTM [9].
The superposition of the two curves lf = f (x) (coil length), and l0 = g (x) (nucleus length) shown in
Figure (4) shows the evolution of the gradual penetration of the nucleus in the coil chasing air that above.
l0 : coil length
lf : nucleus length

Figure 4. Progressive evolution of the nucleus
III. Simulation
The system of equations reflecting the operation of parametric oscillating motor is solved according to
the block diagram of Figure 5
Figure 5. Block diagram of a simulation LOTM
The electrical part figure 6.a and figure 6. b, is a set of blocks representing the different parameters of
electrical equations that govern the operation of the motor made above.

Figure 6.a SUB-SYSTEM electrical part
Figure 6.b SUB-SYSTEM electrical part
Figure 7. SUB-SYSTEM mechanical part.
L0
2
uc
1
i1
Sine Wave
Scope3
Scope2
Scope1
Product1
1
s
Integrator2
1
s
Integrator1
[i1]
Goto4
Divide
Add
-C-
1/c
4
Input
3
2
i2vM
1
Mi2

below, the graphical results, whether those obtained in MATLAB (figures (. a) shown in the left
column), or those obtained by simulation figure (b) shown in the right column.
Figure (8.a, 8. b) Variation of the inductance of the nucleus Lf in function of time and displacement.
Figure (9.a, 9. b) Variation of the inductance of coil without iron nucleus L0 in function of the
displacement and time.
Figure (10.a, 10. b) Variation of the total inductance L in function of the displacement and the time
Figure (11.a, 11. b). Variation of the mutual M in function of the displacement and the time
Figure (12.a, 12. b) variation of the magnetic force in function of the displacement and the time

Figure (13.a,13.b) variation of the speed in function of the displacement and the time.
IV. Conclusion:
Faced with these comments and looks of results, interesting perspectives that can contribute to
improving the functioning of the device MLTO are possible: The study of other configurations and
optimization of the magnetic circuit may contribute to the improvement of motor LOTM.
The stability and control of this type of motor may facilitate its integration in several industrial applications.
The possibility of a storage system and technical and economic optimization of the electro-mechanical
conversion chain integration. The study of the magnetic perturbations inherent coupling reaction LOTM
overlooked imbalances and voltage dips and fluctuations.
References
[1]. S. Kikuchi and K. Ishikawa « A New Type 4-Legged Linear Parametric Motor with Excellent Performance» IEEE Transactions
on magnetic, vol. 33, No. 5, September 1997. IEEE Transactions on magnetic, vol. 34, No 4 , July 1998.
[2]. K. Ishikawa and M. Ishizuka and S. Kikuchi, Performance Characteristics of A New Type of Linear Parametric Motor With
Double Driving Surfaces, IEEE Transactions on magnetic, vol. 34, No 4 , July 1998.
[3]. Yorshinori Mitsuo Natsusaka Koichi Murakami, « Anomalous phenomena in the performance of the parametric motors »
[4]. B.Z.Kaplan, « A note on parametric machines » Proc. IEEE, vol.54, p. 898, 1966.
[5]. D. HEDJAZI and A. Chaghi and.Abdessamed, “Modeling and characterization of High Performance Linear Oscillating Parametric
Motor, Jee Journal of Electrical Engineering” , vol. 7, N°1,Poitechnica of Timisoara, Romania. ISSN 1582-4594, 2007.
[6]. K. Ishikawa and S. Kikuchi, « Improvement of the Performance characteristics of a linear parametric motor with Open Magnetic
Circuit » IEEE Transactions on magnetics, vol. 35, No. 5, September 1999.
[7]. E.A.Mandrela, «Comparison of the performance of a lnear reluctance oscillating motor operating under AC supply with one under
DC supply » IEE transactions on energy conversion, Vol.14 N° 3, September 1999.
[8]. A.MAZOUZ, D.HEDJAZI A.CHAGHI, “Calculation and visualization of inductances and magnetic force of a coil iron nucleus”,
IOSR-JEEE. Vol 9, N°1, 2014.
[9]. A.MAZOUZ, D.HEDJAZI, “Comparative study between two models of a linear oscillating tubular motor”, IOSR-JEEE. Vol 9,
N°4, 2014.
Dr. Azeddine MAZOUZ was born in Algeria BATNA, 1959. He received an engineering
degree and magister electrical engineering at the University of BATNA (ALGERIA) in 1986
and 1995 respectively; PhD in electrical engineering in 2014. His areas of interest include
finite elements, electric motors, linear motors and electromagnetic fields.
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
t
v

Simulation of a linear oscillating tubular motor

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Simulation of a linear oscillating tubular motor