Solid-stage dc motor

IPC classes for russian patent Solid-stage dc motor (RU 2426213):

H02K29/08 - using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K0029120000 takes precedence);;

H02K29/03 - with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Another patents in same IPC classes:

Contact-free dc motor / 2420851

Contact-free DC motor comprises a permanent rotor magnet, three Hall converters with signal generators, three stator windings. The logical converter with its outlets is connected via inverters to the inlets of transistor amplifiers. The outlets of the Hall converter signal generators are connected to the inlets of the logical converter on three logical elements EXCLUSIVE OR, three inlets of the logical converter are connected to according outlets of the Hall converter signal generators, and outlets of the logical elements EXCLUSIVE OR are the outlets of the logical converter. Transistor amplifiers may be arranged on the basis of a bipolar transistor of n-p-n structure or on the basis of a field transistor of N-channel structure.

Drive of current disconnecting switch of overhead system of railway / 2419908

Drive of current disconnecting switch of overhead system of railway includes the housing in which six electromagnets are arranged in a circumferential direction at equal intervals. Magnetic conductor of each of electromagnets has a gap. Disc made from non-magnetic material and interlocking disc are rigidly installed on the drive shaft. Ten steel plates are located on the disc from non-magnetic material in a circumferential direction at equal interval between themselves. Steel plates have the possibility of entering the gaps of magnetic conductors of electromagnets. Fibre-glass plastic can be used as non-magnetic material of disc.

Contact-free dc motor / 2408127

In contact-free DC motor, comprising permanent magnet of rotor, joined to two Hall converters by flow of induction, outputs of Hall converters signal generators are connected to inputs of logical converter based on two inverters and four logical elements 2OR-NOT or on two inverters and four logical elements 2AND-NOT. Transistor amplifier may be arranged on two bipolar transistors n-p-n or on one field transistor of N-channel structure.

Double-current generator with compensation winding / 2396682

In the proposed double-current generator for compensation of resultant mechanical motive force of armature in the commutation zone to the specified level there intended is independent compensation system which includes the following: in-series connected windings of auxiliary poles and compensation. Hall sensor for measuring mechanical motive force in commutation zone of machine is located on geometrical neutral under the centre of the tip of auxiliary pole. Hall sensor is connected to microcontroller input. There is controller power unit, power unit of windings of auxiliary poles and compensation winding with direct current. Invention provides direct measurement of mechanical motive force in commutation zone of machine by means of Hall sensor. Self-excitation of generator occurs during its start-up. Transformer of controller power unit is connected to linear voltage of generator. Power unit of windings of auxiliary poles and compensation with direct current consists of three-phase transformer connected to contact rings of generator, rectifier and pulse width converter to the input of which the control signal providing minimisation of resultant mechanical motive force in commutation zone of machine is supplied from microcontroller.

Vehicle electric drive / 2374090

Invention relates to transport machine building. Device contains hollow rotor in the form of iron ring with mounting hardware to it of vehicle wheel, additionally iron ring of rotor is implemented in the form of two semi-bowls, each is in the content of side wall with choke for bearing and shouldered shell, located in rotor cavity stator, equidistant constant magnets, implemented as compound in the form of two annular sectors, which are located in shells of rotor's semi-bowls, dipole magnets, located circumferential the stator. Feeding on winding of dipole magnets is fed through introduced into device capacity regulator and reverse and commutators, managed from outlets of RS trigger, to inlets of which there are connected outlets of position sensors of constant magnet pole of rotor relative to poles of dipole magnets.

Position sensor of rotor of electric motor / 2357348

Present invention relates to electrical engineering and is meant for use in ac electronic motors and ac electronic-inductor motors. According to the invention, the position sensor of the rotor of an electric motor has a static stator (1), rigidly joined to the stator of the electric motor, magnetosensitive elements 2), (3), (4), in form of Hall sensors or magnetoresistors, for example a rotor (5), made from magnetic insulating material and kinematically linked to the rotor of the electric motor, a ferromagnetic disc (6) with openings and circular permanent magnets (7) and (8), magnetised axially. In this design of the sensor, two permanent magnets are used, common for all detecting elements and rigidly fixed to the shaft of the rotor together with a magnetically conductive disc. The field of the permanent magnets is distributed to Hall sensors through the magnetically conductive disc and an air gap. As a result sensitivity of the sensor to movement of detecting elements about the magnets is reduced, as well as to non-uniformity of the permanent magnets.

Synchronous self-starting motor / 2342764

Invention relates to electrical engineering and may be used, for example in automatics diagrams, domestic appliances, for kitchen machines, time relays and micro pumps etc. Synchronous self-starting motor includes cylindrical rotor represented with magnetised diametrically permanent magnet and stator with two exciting coils from single-phase energy source and step-like polar surfaces. Exciting coil leads are connected to one of the electric power source poles through triple diode controlled by rotor position sensor (RPS). During startup signaling element of RPS is moved away from sensitive elements to the angular distance equal to α and π-α angles of stator and rotor pole axes crossing, when rotor is in fixed position. Angle α is equal to 0.3-0.5 of angular distance of stator surface stage arc creating minimal air clearance with rotor surface. Sensitive elements of RPS are implemented as receiver and optically coupled isolator radiator. Cylinder with signaling element is installed between the above receiver and optically coupled isolator radiator and on the rotor shaft. The cylinder with signaling element is represented as either connection plate of transparent and light-proof semi-cylinder or Hall generators. Permanent magnet with signaling element coinciding with magnet neutral axis is installed between Hall generators and on rotor shaft.

Method of measuring the rotor current of synchronous generators with brushless excitation / 2327273

Invention relates to electrical engineering and may be used in the rotor current transducers for regulation of the generator excitation conditions, and for diagnostics of the rotor winding state the invention allows measuring the rotor current with time resolution smaller than one revolution of the rotor, producing the signal proportional to the rotor current independent on the rotor speed and getting an oscillogram of the generator rotor current to analyse its spectrum to estimate the working conditions of the generator rotor circuitry and excitation circuitry. According to this invention, a magneto sensitive material is inserted in insulating spacer between conducting half-rods along the rotor axis, the rod sensitivity vector being perpendicular to the rotor axis. The rotor current is determined from the electrical signal generated by the magneto sensitive element.

Mode of receiving a feedback signal in structures of control systems of electric drives with supporting flux-linkage of an electric engine / 2314546

In the mode of receiving a feedback signal in the control structures of electric drives with supporting flux-linkage of an electric drive in quality of a feedback signal they use value of the flux-linkage arising in the cut of the magnet conducting plate installed on the stand of the electric engine between the polar divisions. The feedback signal acts also at zero assignment because the given signal directly depends from flux-linkage in the gap. Therefore having once tuned the control system of the electric drive at nominal regime of work, the received feedback signal allows further controlling deviations of the flux-linkage from nominal value and that is the main assignment of the control systems of electric drives with supporting the flux-linkage.

Measuring transducer / 2212087

The invention relates to measuring technique and can be used to determine the speed and angle of rotation of the motor armature

Asynchronous ac converter-fed motor / 2423775

Asynchronous ac converter-fed motor with supply from DC source comprises an m-phase winding with even quantity of phases installed on a stator. All phase windings are arranged with a middle lead connected to one terminal of the supply source. End leads of n winding are connected to the second terminal of the supply source by means of controlled key elements, where n = 1, 3, 5, etc., at the same time end leads of (n + 1) winding are connected to the specified leads of n winding via diodes connected in accord relative to current in according sections of n winding. There is a capacitor connected in parallel to each section of (n + 1) winding.

Synchronous reluctance machine / 2422972

In the proposed synchronous reluctance machine, which comprises a multiphase power winding on a stator, which is evenly distributed along an inner bore of the stator and designed for connection to a valve converter, and also a multiphase excitation winding with a full pitch, designed for connection to controlled exciters, according to the invention, at the edges of each rotor pole there is a corrugation arranged in the form of grooves with the pitch h = 8 - 10 mm, and their bases are located in planes parallel to axis of rotor rotation, at the same time the width of each groove is a = 2 - 4 mm, the depth b = 8- 10 mm.

Low-speed electric machine with circular stator / 2417506

In electric machine the stator in the form of a circular structure of "П"-shaped form with anchor winding and toroidal excitation winding is taken out to the value of the average radius of the anchor magnetic conductor, determined by calculation, and the disc rotor with double-sided arrangement of ferromagnetic poles is structurally combined with the shaft by radially aligned rods-spikes, which provides for considerable increase of circumferential speed of poles, and accordingly, of electromotive force of the anchor winding, and accordingly, reduction of the anchor winding resistance, which provides for achievement of technical result, consisting in increase of efficiency factor of this electric machine at low values of angular frequency of rotor rotation. The possibility is also provided to use a modular principle of the electric machine, which simplifies technology of manufacturing low-speed electric machines of high capacity (over 100 kW), and also increases specific values of capacity and torque.

Synchronous reluctance machine / 2408967

In the proposed synchronous reluctance machine there is multiphase power winding on a stator that is evenly distributed along the inner bore of the stator and serves for connection to valve inverter, and also multiphase exciting winding located in stator grooves and serving for connection to controlled exciters. According to the invention each phase of multiphase exciting winding is laid in one of the grooves of each stator phase zone in the centre of this zone, groove section represents equilateral trapezium with the base at stator backside. Note that groove walls formed by teeth are tilted towards each other.

Valve-inductor motors with magnetic field concentrators / 2399142

Valve-inductor motors of proposed design comprise salient-pole symmetrical stator with concentrated windings made of ferromagnetic material, and bipolar symmetrical rotor made of ferromagnetic material, without windings and without permanent magnets. Slots of rotor in valve-inductor motor are filled with material, having diamagnetic properties, and neighbouring half-windings of stator are separated from each other with the help of T-shaped wedges made of materials having diamagnetic properties. Such structural design provides for the fact that in valve-inductor motor magnetic flows of scattering are practically unavailable since paths of these flows closing are barred with structural elements, having diamagnetic properties and being actually magnetic insulators. Reduced magnetic flows of scattering results in reduced coefficient of energy return, reduction of losses and increased motor torque.

Brushless motor / 2237341

The invention relates to the field of electrical engineering, namely to brushless motors

Two-phase, electronically-commutated reactive machine / 2180766

The invention relates to electrical engineering and for features switched reactive machines used as DC motors, having an additional function generator

Valve-inductor motors with magnetic field concentrators / 2399142

Synchronous reluctance machine / 2408967

Low-speed electric machine with circular stator / 2417506

Synchronous reluctance machine / 2422972

FIELD: engines and pumps.

SUBSTANCE: proposed motor comprises housing accommodating stator and rotor, baffle jointed to housing on face side opposite the shaft to support cylindrical commutator with terminal box aligned with housing, and heat conducting barrel mounted on outer cylindrical surfaces of commutator and housing. Motor incorporates electrical filter made up of sleeve made of insulating material with blind space and plate of insulating material to stop said space, and electromagnetic noise killer arranged inside said space. Said sleeve is connected with barrel bottom via threaded fasteners while plate is provided with fasteners passages. Terminal box and sleeve conductor passages terminate on their outer surfaces communicated with conductor groove made on heat conducting barrel lateral wall.

EFFECT: reduced electromagnetic noise.

3 dwg

The invention relates to machine tools and can be used in the composition of the control units and drives products and space technology.

Known contactless DC motor containing a cylindrical body made of material with high thermal conductivity and installed the stator and the rotor with the shaft, the wall of heat - insulating material attached to the housing at the end opposite the shaft, and installed on the cylindrical switch with terminal block on its side [1]. The disadvantage of this motor is a poor heat dissipation from the switch into the surrounding atmosphere when the motor in the vast majority of units on Board the spacecraft, which is caused by the absence of convection due to the weightlessness and low thermal conductivity walls of heat - insulating material.

This lack deprived contactless DC motor containing cylindrical body installed therein a stator and a rotor, the partition of heat - insulating material attached to the housing at the end opposite the shaft, and installed on the housing coaxially of the cylindrical switch with terminal block at its free end, a closed vinyl cover, and t is the train thermally conductive glass, mounted on the outer cylindrical surfaces of the switch and housing, selected as a prototype [2].

The disadvantage of this contactless direct current motor is a significant level created them conductive and radiated electromagnetic interference due to continuous transformation of direct current in the supply circuit of the power pulse applied in the other stator winding of the motor, which transistor is the key switch. The level of such interference is less than the electric motors with a commutator-and-brush site, but sufficient to affect other devices and systems for space vehicles and orbital stations in the immediate vicinity of the unit, which is equipped with a contactless direct current motor, and United them in a common electrical circuit. Due to the constant complexity of the composition of systems of space objects and the introduction of modern technologies, the importance of measures to ensure electromagnetic compatibility (EMC) equipment is becoming increasingly growing importance that, in particular, is described in [3]. At the same time commercially produced non-contact DC motor type Bq-1, Bq-2 [4] do not have enough low-created PR is the work of conducted and radiated electromagnetic interference, which limits their use in aggregates and space technology without taking measures to reduce them. Such measures are known in motors with commutator-and-brush-site in the form of inclusion within the motor device for suppression of electromagnetic interference in the form of a noise suppressing capacitor [5]. However, the introduction of devices for suppression of electromagnetic interference directly in the composition of commercially developed contactless DC motor is not always possible and, moreover, is not always desirable, because, firstly, requires confirmation tests for mechanical and, secondly, inevitably leads to an increase of the dimensions of the motor. A similar increase in the dimensions of the motor is possible only when (and if!) confirm all consumers acceptability of such changes, in addition to a number of consumers do not need such a high performance EMC, as the developers of rocket and space technology. Another way of increasing the EMC contactless electric motor of a direct current - setting device for suppression of electromagnetic interference in the form of a separate device - filter - requires secure on the product and may not always be implemented in connection with a very dense layout of rocket and space technology.

The technical result, d is evil in using the claimed invention, is to reduce the level of electromagnetic interference.

This result is achieved due to the fact that the known contactless DC motor containing cylindrical body installed therein a stator and a rotor, the partition of heat - insulating material attached to the housing at the end opposite the shaft, and installed on the housing coaxially of the cylindrical switch with terminal block at its free end, a closed vinyl cover, and the heat-conducting glass, mounted on the outer cylindrical surfaces of the switch and housing, according to the invention equipped with an electric filter, made in the form of a sleeve of insulating material with a hollow cavity and a plate of insulating material covering the dead of the cavity, and is installed inside the cavity of the device for suppression of electromagnetic interference, sleeve plate placed between the vinyl cover and the bottom heat-conducting glasses, Bush turned a deaf cavity toward the bottom thermally conductive Cup and connected to the bottom by means of threaded fasteners, and the plate is made grooves for their passage channels for output wiring from the terminal block and sleeves are made facing the side surface of the terminal Colo is key and sleeve, respectively, with the formation of the outlet openings, facing the groove under the electrical wiring is made on the side wall of the heat-conducting glasses.

Figure 1 shows an example of a specific implementation of contactless direct current motor, a longitudinal section, figure 2 is a cross section along a-a in figure 3 shows the electrical circuit of a device for suppression of electromagnetic interference.

Contactless direct current motor comprises a cylindrical housing 1 made of a material with high thermal conductivity (in this example, metal) and installed the stator 2 and the rotor 3 (permanent magnet) with the shaft 4. The housing 1 is attached from the side of the end face 5 opposite to the shaft 4, the partition wall 6 of the heat - insulating material (in this example made of plastic), it has a cylindrical switch 7 terminal block 8 at its free end 9, a closed vinyl cover 10. The motor is equipped with thermal glass 11 (in this example, metal)mounted on the outer cylindrical surfaces 12 and 13 of the switch 7 and the housing 1, respectively. On the wall of the Cup 11 on the side opposite the bottom 14 made 8 longitudinal slots 15 and on the outer surface of the wall of the Cup 11 in the place of its contact with the outer surface 13 of the housing 1 is installed clamp 16, the ends of the to the which tightened the screw 17. The material of the wall of the Cup 11 between each two adjacent slots 15 formed petals 18. The cover 10 is attached to the terminal block 8 by a screw 19. The motor is equipped with an electric filter 20, is made in the form of a sleeve 21 of insulating material with a hollow cavity 22 and plate 23 of insulating material covering the dead of the cavity 22, and is installed inside the cavity 22 of the device EMI suppression 24. In this example, the device is made in the form of 4 capacitors 25, mounted and soldered on the petals 26, seamed in the wall of the sleeve 21. The sleeve 21 with the plate 23 is placed between the vinyl cover 10 and the bottom 14 of the heat conductive Cup 11. The sleeve 21 is turned hollow cavity 22 toward the bottom 14 of the heat conductive Cup 11 and connected to the bottom 14 by means of threaded fasteners in this example, the screws 27, and the plate 23 is made grooves 28 for their passage. Channels for output wiring from the terminal block 8 and the sleeve 21 is made facing the side surface of the terminal block 8 and the sleeve 21, respectively, with the formation of the outlet openings 29 and 30 extending into the groove 31 under the electric wire 32 is coming from the electric filter 20 to the switch 7 and the conductor 33, connecting the power cable to the electric motor filter 20, is performed on b is a similar thermally conductive wall of the Cup 11. Device for suppression of electromagnetic interference 24 in this specific example of implementation, the scheme is presented in figure 3, consists of four capacitor 25 connected in parallel-sequentially, so that any failure of one of them any type - open or short circuit do not lead to loss of efficiency of the motor. The cavity 22 is filled with a sealant (not shown).

Contactless DC motor operates as follows: when the voltage supply to the switch 7 the latter produces a sequence of signals applied to the stator winding 2. Created these signals, the magnetic field interacts with the rotor 3 and causes its rotation together with the shaft 4. Allocated in the switch 7 heat on its outside diameter, is passed through contact over a large area on the side surface of the heat conductive Cup 11. Because glass is made from a material with high heat conductivity, the heat is transferred by him to the casing 1. Since the housing 1 is also made from a material with high heat conductivity, the heat is further transmitted to the parts installed on the motor (not shown). As a result of intensive heat transfer through the glass 11 and the housing 1 is not the accumulation of heat in the switch 7, which leads to decrease E. what about the temperature and to increase resource radio electronic elements of the switch and increase the reliability of the motor. The presence of longitudinal slots 15 is required for mounting the heat-conducting glass 11 to the switch 7, as formed between the petals of 18 have the opportunity radial displacement from the axis of the motor for the passage of the switch through the minimum inner diameter of the heat conductive Cup 11. The execution of the channels for output wiring from the terminal block and sleeve on the side surface of the terminal block and sleeve, respectively, with the formation of the outlet openings facing the groove under the electrical wiring is made on the side wall of the heat conductive glass, it is necessary, since the switch 7 and the electrical filter 20 are connected together by cables 32, when assembling the motor first is the soldering of the wires 32 to the terminal block, closing it with a lid 10 and a set screw 19, and then the cover is fitted with an electric filter 20, is soldering thereto of electrical wires 32 and 33 close the cavity 22 plate 23, and then to the electric motor wear the heat-conducting glass 11, when bending the blades 18 and passing the free ends of the wires 33, and the wire 32 extending from the hole 29 and going into the holes 30, through the slot 31. Next, install the screws 27, the mounting clamp 16 and the tightening of the screw 17, and then make the fill of the cavity 22. Electromagnetic interference in the form of pulsations e.g. the supply, inevitably generated by the motor when switching the windings of the stator, significantly attenuated due to current flow through the capacitor 25 having a low resistance AC current and infinitely large direct current, which is supplied to the motor. Device for suppression of electromagnetic interference can have any other known technique in electrical circuits, for the realization of the invention it is immaterial, therefore, the claims listed unifying feature "device for suppression of electromagnetic interference". Because the petals 26, rolled in the bottom of the sleeve 21, in contact with vinyl cover 10 excluded short circuit applied to the motor constant voltage. The result is a significant reduction of the levels of conducted and radiated electromagnetic interference generated by the motor during its operation, that allows to satisfy the requirements of the EMC requirements of the units of rocket and space technology. When this electrical filter, which is equipped with a motor that does not require special fastening element as attached to the heat conducting glass, already included in the prototype. A significant advantage is the ability to set the heat-conducting glass with an electric filter for serially discharging aimie motors (for example, motors type BC-1 or BC-2 OST 16 0.515.054-80, specially designed and widely used in the products of space technology) without revision.

Specified the advantage of reducing electromagnetic interference is can be recommended for the claimed technical solution for use in units of rocket and space technology.

Literature

1. Emichailov, "Peculiarities of design and manufacturing technology of contactless DC motors for space applications", dissertation in the form of a scientific report on competition of a scientific degree of candidate of technical Sciences, M, typography VNIIEM, 1999, p.15, 16 and 2

2. The patent of Russian Federation №2210162, IPC: NC 29/08, 2003 (prototype).

3. EMC for systems and installations. T.williams, Carmstrong. - M.: Publishing house "Technology", 2004, p.15.

4. An industry standard. DC electric motors contactless series Bq-1, Bq-2. Technical conditions. OST 16 0.515.054-80.

5. USSR author's certificate No. 1312688, IPC: NC 11/00, 1987

Contactless DC motor containing cylindrical body installed therein a stator and a rotor, the partition of heat - insulating material attached to the housing at the end opposite the shaft, and installed on the housing coaxially of cylindri the mini-switch with terminal block at its free end, sealed vinyl cover, and the heat-conducting glass, mounted on the outer cylindrical surfaces of the switch and the housing, characterized in that it is equipped with an electric filter, made in the form of a sleeve of insulating material with a hollow cavity and a plate of insulating material covering the dead of the cavity, and is installed inside the cavity of the device for suppression of electromagnetic interference, sleeve plate placed between the vinyl cover and the bottom heat-conducting glasses, Bush turned a deaf cavity toward the bottom thermally conductive Cup and connected to the bottom by means of threaded fasteners, and the plate is made grooves for their passage channels for output wiring from the terminal block and sleeves are made facing the side surface of the terminal block and sleeve, respectively, with the formation of the outlet openings facing in a groove in the wiring done on the side wall of the heat conductive Cup.