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INVENTION
Patent of the Russian Federation RU2162812
DEVICE FOR A LINEAR ELECTROMAGNETIC MOTOR
Applicant's name: Bikhman Rudolf Ionovich
The name of the inventor: Bichman Rudolf Ionovich
The name of the patent holder: Bikhman Rudolf Ionovich
Address for correspondence: 129085, Moscow, Mira Ave. 99, ap. 36, Bichmanu R.I.
Date of commencement of the patent: 1998.12.16
The invention relates to control systems for artificial earth satellites using the Earth's magnetic field. A closed diamond-shaped magnetic core with cut off sharp angles is the concentrator of the vertical component of the Earth's magnetic field. The concentrator is made of strips of ferromagnetic material with the plane of the diamond lying perpendicular to the direction of flight, and the major axis - along the binormal to the orbit. Narrow grooves are located along the strips of the magnetic circuit evenly along its width. The working sides of the rectangular working windings are located in the grooves on the sections of the magnetic circuit, which close the severed sharp angles of the diamond, and the other sides cover the magnetic circuit strips. The opposite sides of the turns are located outside the magnetic circuit. When a direct current flows through them, an external force is created along the direction of flight, the sign of which is determined by the direction of the current. The difference of the device is that one of the sides of the rectangular coils is located in the concentrator of the Earth's magnetic field. This propulsor is characterized by increased values of the developed thrust force.
DESCRIPTION OF THE INVENTION
(EN) The invention relates to control systems for artificial earth satellites (AES) using the earth magnetic field B64G132.
There are known devices for creating external control moments acting on an artificial earth satellite with the help of electromagnets interacting with the earth's magnetic field used in the artificial satellite orientation systems (see USSR copyright certificate No. 579740 of July 14, 1977 with priority from March 1, 1963) . Devices for creating external linear forces (traction) due to interaction with the magnetic field of the Earth, operating without the ejection (flow) of the working fluid, are unknown. Thus, the linear electromagnetic drive device (LEMD), designed to create a linear external force (traction) due to interaction with the Earth's magnetic field, has no prototypes and is a pioneer one.
DESIGNATION OF LEMMAS
The LEMD device is designed to create an external linear force acting on the satellite, oriented in the orbital coordinate system and output to a polar or inclined orbit with a height of 2500 to 3000 km from the Earth. LEMD can be used to compensate the forces of the drag of the medium and to regulate the position of the satellite in orbit.
DESCRIPTION OF LEMAD DESIGN
LEMD consists of a closed magnetic circuit of a diamond-shaped shape with cut and rounded sharp angles, made of wide thin (thick 
M ) of magnetic soft ferromagnetic material. The magnetic line is located on the satellite in the vertical plane YoZ, perpendicular to the direction of flight. In this case, the major axis of the rhombus is directed along the binormal to the orbit, and the minor axis of the rhombus is directed along the local vertical (see Fig. 1).
Parts of the magnetic circuit, located along the "cut" parts of the rhombus, will be called vertical (BM), and the remaining parts - inclined (NM) or concentrators of the external magnetic field (CVP).
Along the whole magnetic circuit, evenly along its width, there are narrow grooves (width N ). In the grooves of the vertical parts of the magnetic core, working windings (PO) are placed along which a constant current Ip (working) is passed.
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Current in all turns of working windings within the slots of both vertical parts of the magnetic circuit flows in one direction. Parts of the windings of the working windings, located outside the groove, clamp the vertical magnetic circuit from the side (see Fig. 2). Such a design ensures a virtually complete absence of magnetic fluxes in the magnetic circuit created by currents in the working windings. Located on the satellite in a plane perpendicular to the direction of flight (indicated by the arrow NP in FIG. 1), the LEMD magnetic core with a height h MAX and a length L consists of inclined parts (1 of Fig. 1) and vertical parts (2 of Fig. 1 ). On the vertical parts of the magnetic circuit with a height h MIN are placed working windings (Item 3 of Figure 1). To preserve the required diamond shape of the magnetic circuit, non-magnetic fasteners (item 4 of figure 1) are used. To preserve the distance between individual bands, special band fastening units are used (item 5 of figure 1). The cross-section (according to AA) of the lashing unit is shown at pos. 1, Fig. 2. In order to form a closed magnetic circuit, special joints are used from individual ferromagnetic bands (6 of Fig. 1). Longitudinal and transverse sections of the junction joint (by BB and DD) are shown in pos. 2 and 3 of FIG. 2. |
The junction joint consists of two non-magnetic cylindrical spokes (item 3.1 of figure 2), two clamping plates (item 3.2 of figure 2) and non-magnetic bolted connections (item 3.3 of figure 2).
The working windings shown in sections EE and FF (item 4 of figure 2) are placed on a frame of insulating material consisting of two parts (item 5 of figure 2) between which the plates of the vertical parts of the magnetic circuit are located (6 of Fig. 2). The arrangement of all the cuts shown in FIG. 2 is shown in a general view of the LEMD (Figure 1).
Along the whole magnetic circuit there are several nodes for fixing the strips of the magnetic circuit and two junction points for the parts of the magnetic circuit. A good magnetically conducting contact is provided at the junction points of the magnetic circuit.
DESCRIPTION OF THE LAND PRINCIPLE OF OPERATION
When a satellite is flying along a polar or inclined orbit in high latitudes (more than 50 o north or south latitude), the essential component of the Earth's magnetic field vector (MPZ) at the location of the satellite is directed along the local vertical (B op ). During the flight of an artificial earth satellite with the location of the LEMD on the satellite, as indicated in Section 3.2, the inclined parts of the magnetic circuit cross the vertical component of the MPZ and the magnetic field passes, in large part, along the magnetic circuit, and only a small part of the magnetic flux entering the inclined magnetic flux passes through the space between the two Inclined parts of the magnetic circuit.
When the magnitude of the magnetic flux passing through the magnetic circuit is equal to kF on , where Ф on is the magnetic flux incident on the outer surface of the magnetic circuit; K - coefficient of useful use of external magnetic flux (k <1):
Vm = kB on · L / 2 M (1)
Where B is the magnetic induction in the vertical part of the magnetic circuit,
B on is the vertical component of the magnetic induction of the external magnetic field,
L is the length of the magnetic circuit (along the major axis of the diamond).
When the LEMD moves along with the satellite along the orbit, the magnetic lines of force of the external field, moving across the magnetic circuit, intersect the conductors with current placed in the grooves of the vertical parts of the magnetic circuit.
Due to the interaction of the current in the winding ( Ip ) with the external magnetic field, the conductors in the grooves are subjected to the force F,
F job = Bm · I r · W r · M = kB on · L / 2 · I r · W p (2)
Where W p is the number of turns of the working winding.
The sides of the turns, which are outside the magnetic circuit and parallel to parts of the turns in the grooves of the vertical magnetic circuit, experience a force opposing the working field - F np , equal to
F pr = -B on · I p · W r · In po (3)
Where p0 is the width of the working winding.
The useful force developed by one winding will be equal to
F pol.o = F slave - F pr (4)
The useful force developed by LEMD,
F floor. = 2F pol.o = 2kB on · I p · W r · (L / 2 - in ro / k) (5)
Thus, for L = 1.5 m; I = 4 A; W = 600; B on = 0.35 · 10 -4 T; K = 0.95 and, setting B0 = 40 mm
4. The list of figures
4.1. FIG. 1. Linear electromagnetic thruster LEMD. General form.
4.2. Linear electromagnetic thruster LEMD. The incisions.
5. Information confirming the possibility of implementation
The LEMD design described above does not contain anything other than magnetic circuits made of strips of ferromagnetic material and windings from an insulated copper wire. These structures can be performed on any electric machine plant.
CLAIM
The device is a linear electromagnetic propulsion device intended for installation on an artificial satellite, oriented in the orbital coordinate system and output to a polar or inclined orbit with a height of 2500 to 3000 km, containing a closed diamond-shaped magnetic loop with cut off sharp angles, which is a concentrator of the vertical component of the Earth's magnetic field and made Of strips of ferromagnetic material with the arrangement of the rhombic plane perpendicular to the direction of flight, and the large axis of the diamond - along the binorama to the orbit and the arrangement of narrow grooves along the strips of the magnetic circuit uniformly along its width, rectangular working windings of insulated copper wire, the working sides of which are located in the slots on the sections of the magnetic circuit , Which close the severed sharp angles of the diamond and the other sides cover the magnetic circuit strips with the arrangement of the sides of the turns opposite to the working ones outside the magnetic circuit and with the possibility of creating an external force flowing along them along the direction of flight, the sign of which is determined by the direction of the current, Of the sides of the rectangular turns of the working winding is located in the concentrator of the Earth's magnetic field.
print version
Date of publication 11/28/2006
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