SU1534667A1 - Electric motor with rolling rotor - Google Patents

Abstract

The invention relates to electrical engineering and can be used in an automated electric drive. The goal is to expand the range of speeds of the moments and reduce the mass. The electric motor contains a stator pack 1 with a winding 2 located in its grooves. In the stator bore there is a rotor 3 mounted on the shaft 4. A circular annular cavity 5 is placed along the cylindrical surface of the rotor, into which two identical ferromagnetic inserts 6 and 7. The axial length of cavity 5 is equal to the axial length of inserts 6 and 7 and is limited by the end walls of the rotor. In the case of symmetrical feeding, the inserts 6 and 7 are diametrically opposed in the annular cavity 5, are pressed non-sliding by the stator field to the outer wall of the cavity 5, and the rotor 3 rotates in the bore synchronously with the stator field. In case of asymmetrical feeding, the inserts 6 and 7 under the action of the stator floor are combined, the rotor 3 comes into contact with the bore of the stator and rolls around it. At the same time, the combined inserts 6 and 7 slide in the annular cavity 5 synchronously with the stator field. Due to the reduction on the rotor surfaces along the stator bore, the rotor has a low rotation frequency around its own axis, transmitted to the output shaft. 2 Il.

Description

The invention relates to electrical engineering and can be used in an automated electric drive.

The purpose of the invention is to expand the range of speeds and moments and reduce the mass.

Figure 1 shows the electric motor with a concentric arrangement of the rotor relative to the table of the stator, cross section; figure 2 - the same, with eccentric (the location of the rotor relative to the bore of the stator.

I The electric motor contains a stator pack 1 with a winding 2 located in its grooves. In the stator bore there is a rotor 3 mounted on shaft 4. A circular annular cavity 5 is made along the cylindrical surface of the rotor, into which two identical rigid ferromagnetic inserts 6 are placed with the possibility of free tangential movement 7. The axial length of cavity 5 is equal to the axial length of inserts 6 and 7 and is limited by the end walls of the rotor.

The motor works as follows.

The coils of the winding 2 of the stator 1 are sealed in such a way that a locally closed asymmetrical rotating magnetic field under the action of which the motor produces a one-sided attraction, which shifts together the inserts 6 and 7 and moves them along the closed annular cavity 5 (Fig. 2) Under the action of the force moving the inserts 6 and 7 in the annular cavity 5, the rotor 3 is displaced from the center of the bore of the stator. Its surface comes into mechanical contact with the surface of the bore of the stator and the contact line synchronously with the magnetic field moves along the bore of the stator. In this case, the coupled inserts 6 and 7 under the action of a magnetic field slide in the annular cavity 5, and the surface of the rotor 3 rolls around the surface of the bores of the stator 1. Due to the difference in the lengths of the circumferences of the surface of the rotor 3 and the bores of the stator 1, the rotor 3 rotates around its own axis with a frequency determined frequency of rotation of the field in the working gap and the reduction on the contacting surfaces of the rotor 3

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and stator bores 1. The rotation of the rotor around its axis is transmitted to the output shaft by means of a transfer of non-axial rotation. If the rotor 3 is installed in the stator bore on the flexible shaft 4, the flexible shaft 4 can play the role of transmitting the non-axial rotation.

Another mode of operation of the engine (Fig. 1) is possible, in which a locally closed symmetric rotating magnetic field is created in the working gap of the engine, under the action of which two forces arise, pushing apart inserts 6 and 7 diametrically opposite sides in a closed annular cavity 5. Under the action of symmetrical forces the rotating magnetic field, the rotor 3 is located concentrically with respect to the bores of the stator 1, the inserts 6 and 7 are pressed against the outer glass of the annular cavity 5, and the rotor 3 rotates in the bore of the stator. In this case, the inserts 6 and 7 are pressed against the outer wall of the annular cavity 5 without slipping. Together with the rotor 3, the output shaft of the engine rotates.

Claims (1)

Thanks to the fact that, depending on the method of feeding, the rotor of the engine rolls around the reamer or rotates synchronously with the stator field in its bore, the range of speeds and torques of the electric motor expands. In addition to TOO, only inserts b and 7 should be made ferromagnetic, and the rotor 3 can be made non-ferromagnetic, for example plastic, which reduces the weight of the engine. Invention Formula An electric motor with a rolling rotor containing a stator with a winding, a rotor freely disposed in the stator bore, an output shaft and a transmission of non-axial rotation, characterized in that, in order to expand the range of speeds and moments and reduce mass, a circular annular cavity is made along the cylindrical surface of the rotor where two identical rigid ferromagnetic inserts with axial length equal to the axial length of the cavity are placed with the possibility of free tangential movement, and the total circumferential length is less than circumferential cavity length. QUIZ.