SU1424087A1 - Commutator electric machine - Google Patents

Abstract

The invention relates to electrical engineering and concerns the implementation of collector electric machines, which have requirements for radio interference during operation. The aim of the invention is to increase the reliability at high rotational frequencies by increasing the solidity and strength of the collector, while ensuring a low level of radio interference and the elimination of 2f3 rises occurring between the collector and the brushes during co-mutation. On the shaft 7 of the collector electric machine there is a collector, in the plastic case 6 of which the lamellae 1 are fastened, between them by means of insulating spacers made of a material with high dielectric constant, metal plates 2 with protrusions 4 are installed. metal disks 5 connected to the projections 4. The containers formed between each lamella 1 and the grounded shaft 7 are evenly distributed around the collector and facilitate the operation of the escaping edge exact collector contact of the electrical machine, whereby sparking are reduced and the energy of the electromagnetic radiation. Thus, in the proposed collector electric machine, reliability at high irradiation frequencies is enhanced due to the solidity and strength of the collector of this design, and also the quality of its electromagnetic compatibility with radio electronic systems of various purposes is improved, 3 or more. i (/) 4 y 4 O 00 |

Description

The invention relates to electrical engineering, in particular to electrical engineering, and can be used in the manufacture of collector electric machines that have increased requirements for radio interference during operation.

The aim of the invention is to increase reliability at high rotational frequencies by increasing the solidity and strength of the collector while ensuring low level of radio interference and arcing between the collector and the brushes when switching.

FIG. 1 shows a collector, a longitudinal section; in fig. 2 shows an end view of the collector and part of its cross section A-A in FIG. 1 in FIG. 3 — a replacement circuit of the proposed electric machine, where I ,, 1 — are high frequency currents.

The collector electric machine contains lamellae 1, metal plates 2, insulating gaskets 3 of high dielectric constant material, while metal plates 2 are made with protruding sections 4. The collector machine also contains metal discs 5, plastic housing 6 of the collector mounted on shaft 7 In the exemplary embodiment of FIG. The 1 and 2 metal disks 5 are made with slots 8.

FIG. 3 in the presented replacement circuit of the electric collector with the numbers 9 and 10 are marked with different polarity, position 11 is equivalent to the replacement circuit of the insulated metal plate 2, position 12 is the winding section of the electric machine with position 13, the points of contact of the metal plates 2 with metal discs 5, 14 is the point of contact of the metal discs 5 with the shaft 7; 15 is the capacitance evenly distributed throughout the collector; I is a high-frequency current that closes the shortest path through the capacitance 15 osednih simultaneously switched lamellas during switching, I high frequency current protekayush "th shortest path through the container 15, wheel 5 and the shaft 7 simultaneously switched slat Hetero molecular brushes.

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In the manufacture of the proposed collector electrical map, the extruded metal plates 2 can be applied on both sides with a material with a high dielectric constant, which acts as insulating gaskets 3 so that the ends of the protruding sections 4 remain uninsulated. Metal plates 2 are installed between Ls; chalk 1 and the assembled collector bag are pressurized with plastic forming the collector body 6, from which both ends are fitted with metal disks 5 so that, for example, protruding parts 4 metal plates 2 enter into slots 8 metal disks 5. The resulting collector is mounted on the shaft 7 by pressing fit. The joints of the protruding sections 4 with metal discs 5 are welded or soldered, which ensures reliable mechanical and electrical connection.

The solidity of the proposed collector is ensured by the uniform distribution of plastic on any part of the collector body, and the connection of metal plates with metal discs along the ends of the collector by welding or soldering increases the strength of the collector. 1 dynamics, i.e. during the work of the electric car. In addition, the implementation of metal plates in contact with metal discs mounted on the shaft at both ends of the plastic collector body along a press fit provides two parallel containers from each lamella to the pinched shaft of the electric machine.

The capacitance of the capacitor formed between each lamella and the grounded shaft of the machine is chosen from the condition that the capacitance is evenly distributed over the collector, and the machine’s own capacitance becomes insignificant before the capacitance introduced, so they can be neglected.

The created uniform distribution of capacitance over the collector ps allows the high frequency pulsations, opposite in sign, to close the collector itself from the opposite-polar brushes in the places of their origin and ensured the discharge of high frequency solar charges to the ground. The uniform distribution of the capacity over the collector significantly increases the total capacity of the shunt section. At the final stage of switching, at the time of the brush break with the lamella, the electromagnetic energy stored in the section of the electric machine is spent in active resistance, in the arc, and on electromagnetic radiation. If there is an increased capacitance shunting the section at the final switching stage, the current being broken by the brush closes through the created capacitances and tends to keep the voltage on the section constant, which facilitates the work of the running edge of the brush horse compatible with radio electronic systems of various purposes.

Claims (1)

Invention Formula A collector electric machine containing a shaft on which the manifold with reinforced 10 plastic casing with lamellae and mounted (wedged between them by means of insulating gaskets made of high dielectric material, metal 15 plates, characterized in that, in order to improve reliability at high rotational frequencies by increasing the solidity and strength of the collector while maintaining tact at the moment of rupture, due to the low level of radio interference and spark, in aggregate, the sparking between the collector and brushing and electromagnetics during commutation, it is supplied with radiation of two metallic gmi disks, in this way, the execution of the plastic collector machine, which is designed on the shaft from the ends ol-25 casing, and metal em increase the reliability of the work of the plate is made with areas of electrically powered electric machines at the plastic rotation frequencies beyond the ends of the ends, as well as the mass casing connected to improve the quality of their electromagnetically metallic discs. s and, 142 .087 compatibility with radio electronic systems for various purposes. Invention Formula A collector electric machine containing a shaft on which the manifold with reinforced lamellas of the plastic casing and mounted (wedged between them by means of insulating gaskets, made of a material with high dielectric constant, metallic plates, characterized in that, in order to increase reliability at high rotational frequencies by increasing solidity and so on (rig 2 17 12 .,. f  7 R --N W t L, R  Vj uff3