SU1169082A1 - Electric motor with clutch - Google Patents

Abstract

ELECTRIC MOTOR WITH CLUTCH on author. St. No. 1032546, characterized in that, in order to increase stability when changing the load by increasing the rigidity of the mechanical characteristics, it is provided with zigzag coils forming the inner layer of the annular field winding, straightening, regulating and switching elements, while zigzag coils are connected in series with excitation ring, and the distance between adjacent axial areas of zigzag turns is equal to the pole division of one phase of the alternating current winding, m terminals of the winding to one another through a rectifier, switching elements and reguliruyuschsh drive connected.

Description

11 The invention relates to electrical engineering, in particular to aggregates containing an electric motor and an electromagnetic slip clutch used to regulate the frequency of rotation, and is an improvement of the known device described in the author. No. 1032546. The purpose of the invention is to increase the stability of operation of an electric motor with a clutch when changing the load by increasing the rigidity of the mechanical characteristics due to self-excitation of the ring winding. FIG. 1 shows one half of an electric motor with a clutch, the section in FIG. 2 - annular winding with zigzag windings (insulation not shown). An electric motor with a clutch (Fig. 1 contains a magnetically conductive housing 1 in which stacks 2 and 3 of a stator are placed, forming a U-shaped magnetic circuit of an engine with alternating current A winding and an annular excitation winding 5 installed between the packets, covering the winding 4 in its middle part The housing 1 with the packages 2 and 3 and the winding 5 is the stator of the non-contact electromagnetic slip clutch. At the same time the packages 2 and 3 with the winding 4 are the stator of the AC motor. The coupling coupling half 6 (rotor) is fixed on the shaft 7, rotates Ferromagnetic rotor 8, which is simultaneously the rotor of the engine and the leading coupling half, has a non-magnetic conductive ring 9 in the middle part and is freely mounted on bearings of the stator and slave rotor 6 packs 2. Fan 10 for cooling the unit. The inner layer 11 of the annular winding 5 is excited, covering the alternating current winding 4, is made of turns having a zigzag shape (FIG. 2), with the distance between adjacent axial parts of these turns equal to the pole – pole division of one phase of the alternating current winding 4. When executing the excitation windings 5, zigzag coils (inner layer 4) are first placed, and then the remaining annular 2 coils, which are their continuation, are placed on them. The terminals of the winding 5 are connected one by one through rectifier 12, regulating element 13 and switching element (switch) 14. The unit may have external and internal surfaces of the rotor 8 smooth, and the rotor 6 toothed, or the rotor 8 from the stator and the rotor 6 smooth , and the toothed layer on the surface of the rotor 8 that faces the rotor 6 is either the two surfaces of the rotor 8 are toothed, and the rotor 6 is smooth (Fig. 1). In the latter case, the motor is synchronous, and the winding 5 simultaneously serves to drive the coupling and the motor. The device works as follows. When the AC winding 4 is turned on and the switch 14 is opened, the rotor 8 rotates. The rotation due to the interaction of the rotating magnetic field created by the middle part of the winding 4 with eddy currents induced by this field in the electrically conductive ring 9. As the rotor 8 accelerates idle, then at the end of the process, in the presence of teeth on the outer surface of the rotor (Fig. 1), the engine operates as a synchronous reactive. The rotating magnetic field of the middle part of the winding 4 induces variable electromotive forces in the axial parts of the zigzag turns, the instantaneous values of which are shown by the arrow. mi in fig. 2. EMF of all sections is summed. With a low voltage winding 5, there can be only one zigzag coil, and switching a switch 14 on a winding 5 through a rectifier 12 and a regulating element 13 leads to the appearance of a direct current in the winding circuit 5, which is shown by a dashed line (Fig. 1) . A serrated rotor 8 induces eddy currents in a smooth rotor 6, the interaction of which with the flow of teeth creates a moment of rotation and causes the rotation of the rotor 6 with the driven shaft 7. At this point, the tangential (frontal) parts of the zigzag orbits participate in creating the excitation flow. The change of the excitation current and the frequency of rotation of the shaft 7 is carried out by the regulating element 13.

3

As the load of the unit increases, the motor winding 4 and the current induced by it in the excitation winding 5 increase, which increases the coupling torque, rigidity of mechanical characteristics and stability of the shaft rotation frequency 7. In a synchronous motor (Fig. 1), the excitation increases simultaneously load fluctuations.

Making the internal turns of the excitation winding zigzag gives the electric motor with the coupling the properties of an automatic control system in which the excitation current depends on the load.

69082, 4

In comparison with the known device, an electric motor with a clutch provides self-excitation and increases the rigidity of the mechanical characteristics and stability of operation during load fluctuations.

The use of the invention improves the performance

10 driven machines due to higher stability of operation, eliminates the need for a separate power source for the excitation circuit and solves the problem of stability without the use of an external closed-loop control system.

Claims (1)

ELECTRIC MOTOR WITH COUPLING St. No. 1032546, characterized in that, in order to increase the stability of the work when changing the load by increasing the rigidity of the mechanical characteristics, it is equipped with zigzag coils forming the inner layer of the annular field winding, a rectifier, regulating and switching elements, while the zigzag coils are connected in series with ring excitation, and the distance between adjacent axial sections of the zigzag turns is equal to the pole division of one phase of the AC winding, The excitation windings are connected one g to another through a rectifier, regulating and switching elements. 211 .... 1162082 FIG? 1 1169082