Controlled asynchronous machine
SUBSTANCE: in electrical machine the second armature winding is made combined and located in stator slots of the main magnet core; it is equipped with capacitor bank. Second inductor winding is also combines, multi-phase, short-circuited; it is located in stator slots of the main magnet core. The first winding of rotor is connected to toroidal windings of auxiliary magnet core of the rotor; the first winding of stator is connected to output of frequency converter which converts electric energy of current frequency of the second armature winding to required value of control frequency and delivers it to stator winding of the main magnet core in order to create excitation current and rotating electromagnetic field with this control frequency. Control frequency is set at the output so that frequency of output current is permanent notwithstanding frequency of drive rotation.
EFFECT: reducing weight and overall dimensions and improving cooling and ventilation systems.
The invention relates to an adjustable electrical machines AC and can be used as a controlled generator or electric industrial applications. Known adjustable asynchronous machine, RF patent №2069440 C1, 6 H02K 17/30 1996, the Drawback of such electrical machines is a narrow control range. This technical solution adopted for the similar. Technical solution most closely related to the present invention described in the patent "adjustable Asynchronous machine, patent RU 2380813 on 27.01.2010, taken as a prototype.
Asynchronous adjustable electric machine adopted for the prototype, contains the main magnetic circuit of the stator and rotor slots and the first windings of alternating current connected to the toroidal windings of the alternating current of the first additional magnetic core, the second armature winding on the stator and the windings of the coil on the rotor, a second magnetic circuit unit of the frequency Converter connecting the first and second stator winding. The prototype has the following disadvantages: - the complexity of the system of ventilation and cooling, as the main magnetic core with windings placed between the two end additional magnetic circuits; - increased axial length of the machine and the rotor, which leads to a significant reduction CR is the critical shaft speed of the machine.
The purpose of the invention to improve cooling and ventilation while reducing the axial length of the machine. This goal is achieved by the fact that unlike the prototype of the second armature winding is made combined, placed in the slots of the stator main magnetic circuit and provided with a capacitor, the second winding of the inductor is made of a combined, multi-phase, squirrel-cage and placed in the slots of the rotor core of the magnetic circuit.
Distinctive features of the proposed invention are: the execution of the second armature winding combined, placed in the slots of the stator main magnetic circuit and provided with a capacitor, the execution of the second winding of the inductor is combined, polyphase, squirrel-cage, and placed the slots of the rotor core of the magnetic circuit.
The proposal meets the criterion of "significant differences"because of the known list information of the established normative document (paragraph 2 of the Rules drafting, filing and examination of applications for patent for an invention), technical solution with signs, like stated, is not found.
1 shows a structural diagram of an asynchronous adjustable machine figure 2 - cross section AA.
Asynchronous adjustable machine includes a main magnetic circuit of the stator 1 with the first winding of the AC 2 and Deuteronomy is the second armature winding 3, the main magnetic circuit of the rotor slots 4 with the first winding AC 5 and the second polyphase, squirrel-cage winding 6, an additional magnetic core 7 with toroidal windings 8 on the rotor and the additional magnetic core 9 with toroidal windings 10 and output terminals 11 on the stator, capacitor 12, the unit of the frequency Converter 13. The first winding 5 of the rotor is connected with toroidal windings 8 additional magnetic core 7. The first stator coil 2 is connected to the output unit of the frequency Converter 13. The second armature winding 3 is connected to the input of the frequency Converter 13 and is connected to the capacitor 12.
The device operates as follows. When using the adjustable machine as a generator of stable frequency output current when changing the frequency of rotation of the drive turbine, the turbine drives a generator rotor. The second rotor winding is made short, and the second armature winding 3 is connected to the capacitor 12, and therefore in the winding 3 navedatsa EMF and the input of the frequency Converter 13 will receive the AC voltage. The frequency Converter 13 converts the electric power frequency current of the second armature winding 3 in the desired value of the control frequency fyand submits it to the stator winding 2 of the main magnetic circuit and n is th current flows in the excitation frequency "f y".
Under the action of the excitation current in the main magnet 1 generates a rotating electromagnetic field of frequency fy". This electromagnetic field can rotate relative to the rotor counter or under. In this case, the electromagnetic field generates in the first winding 2 of a rotor of the electric power frequency current according to the expression:
p1the number of pairs of poles of the first winding AC
ntthe rotational speed of the drive turbine.
The value of the frequency control sets the output of the Converter such that regardless of the current value of the turbine speed "nt" frequency output current "fn" had a constant value. Since the first winding of the main magnetic circuit is tightly connected to the secondary of the toroidal windings 8 additional magnetic circuit 7, the primary toroidal windings will be transformed current of the same frequency fn"=const and fed through the generator output terminals 11 to the electricity consumer.
The advantages of the proposed solution compared to the prototype are to reduce the size of the machinery while improving cooling and ventilation.
Asynchronous adjustable machine that contains the core is infoprod of stator and rotor slots and the first windings of the alternating current, additional magnetic core with toroidal windings of the alternating current on the rotor and the stator output terminals, a second armature winding on the stator and a second winding of the inductor on the rotor, with the unit of the frequency Converter connecting the first and second stator winding, characterized in that the second armature winding is made combined, placed in the slots of the stator main magnetic circuit and provided with a capacitor, the second winding of the inductor is made of a combined, multi-phase, squirrel-cage and placed in the slots of the rotor core of the magnetic circuit.
SUBSTANCE: in an AC driving motor a self-excitation circuit is connected to a rotor of the second motor, as a result of which an additional torque appears on the common shaft of the drive. The drive comprises a primary driving motor (DM 1) of the driving electric motor (DM 2) with the self-excitation circuit of anchor winding supply; and a load (L), such as a mechanism or a generator. The driving motor with the self-excitation circuit of anchor winding comprises the following elements: an AC motor (1), a transformer (2); stabilitrons (3, 4), serving to stabilise voltage on the primary winding of the transformer, capacitors (5, 6, 7), serving to compensate inductances of the winding of the driving motor DM 2, primary and secondary windings of the transformer.
EFFECT: higher efficiency.
SUBSTANCE: invention may be used both for automation of equipment commissioning process and in a functional mode in devices for control of electric generators in order to get the required value of output parameters, in particular, to control generator excitation in order to weaken hazardous effect of overloads or transition processes, for instance, in case of spontaneous connection, removal or variation of a load. The automatic voltage controller of the synchronous generator comprises a voltage metre, the first summator, a PID controller, the second summator, an amplifier, a generator of initiating pulses, a set point generator, an analog to digital converter, a signal energy calculator, a delay unit, a control parameters calculator, an averaging unit. The control parameters calculator is arranged in the form of a processor device operating in accordance with the logic of ultra-fast annealing.
EFFECT: provides for automatic optimisation of synchronous generator excitation controller parameters by deviation of stator voltage and considerable reduction of transition processes energy.
SUBSTANCE: second accumulator and the second unit of two automatic splitters are introduced into an electromechanical device. The first and second outputs of a battery charging device are connected with the first and second inputs of the second unit from two automatic splitters, having the first and second outputs, and the third input, accordingly connected with the first and second inputs of the second accumulator battery and with its output also connected to the second input of the automatic splitter. The above first input is connected to the third input of the first unit from two automatic splitters.
EFFECT: invention provides for uninterrupted operation of a motor.
SUBSTANCE: output of DC source is connected through rheostat to the first input of automatic release mechanism having the second input connected to output of three-phase rectifier with stabiliser the inputs of which are connected to outputs of synchronous generator. Output of automatic release mechanism is connected to input of DC motor rigidly attached to synchronous generator with exciter. Automatic release mechanism is actuated at equality of voltages. Potentiometer is installed between the second input of automatic release mechanism and output of three-phase rectifier with stabiliser. At that, rheostat output is connected to input of DC motor.
EFFECT: providing load increase without increasing the power of DC source.
SUBSTANCE: system includes starter-generator, relay governor, storage batteries, uninterrupted power supply unit, control unit, group of switches and relay of starter-generator. Uninterrupted power supply unit has direct and return electric connection to control unit. Control unit has return electric connection to tachometer, relay of starter-generator and relay governor. Outputs of relay governor have return electric connections to starter-generator and relay of starter-generator. Relay of starter-generator has direct electric connection to storage batteries and starter-generator and return electric connection to storage batteries.
EFFECT: supply of power to consumers of the facility with electric power of the required quality in all application conditions of the facility.
SUBSTANCE: electromechanical device keeps continuous rotation of electric motor shaft at lower power of power supply owing to introducing storage battery of lower power and voltage multiplier; at that, output of storage battery of lower power is connected through voltage multiplier to the first input of automatic release mechanism.
EFFECT: keeping continuous shaft rotation without using any power supply.
SUBSTANCE: in addition, the second synchronous generator with exciter is introduced to the system; the above generator is rigidly connected to the first synchronous generator with exciter and has the first, the second and the third outputs respectively, which are connected to the first, the second and the third inputs of consumed nodes.
EFFECT: increasing time of rotation of electric motor shaft without connecting AC supply.
SUBSTANCE: self-contained power supply system increases the operating time owing to introduction of unit consisting of two automatic tripping devices and battery charging device. The first and the second output of synchronous generator with exciter is connected to the first and the second input of unit consisting of two automatic tripping devices, which has the third input and the first and the second outputs, which are connected to output of automatic power control unit and through battery charging device - to the first and the second inputs of storage battery.
EFFECT: improving reliability.
SUBSTANCE: device consists of power sources, rheostat, dc electric motor, synchronous generator with exciter, three-phase rectifier with smoothing filter and salve unit. To the device there introduced is commutator of power source, unit of automatic power controls and unit of automatic tripping devices; at that, output of rheostat is connected to the first input of power source commutator, which has output and the second input, which are connected to input of electric motor and to output of automatic power controls unit respectively, the group of inputs of which is connected to group of outputs of automatic tripping devices unit having the input connected to output of three-phase rectifier with smoothing filter.
EFFECT: providing enhanced rotation time of shaft at various frequencies at switched off power source.
SUBSTANCE: system comprises electric motor, which is rigidly connected with synchronous generator with exciter, having the first, second and third outlets, which are joined to the first, second and third outlets of consumed units. The first outlet is also connected through three-phased stabiliser and rectifier with the second inlet of automatic splitter, having the first inlet, connected to outlet of current source and having outlet connected to inlet of electric motor. System provides for possibility to use single-phased stabiliser with rectifier having inlet connected only with the first outlet of synchronous generator with exciter as stabiliser.
EFFECT: increased time of shaft rotation.
SUBSTANCE: magnetic reducer comprises a stator with a magnetic conductor, having teeth, alternating hollow cylinders of the stator and rotor of slow rotation with ferromagnetic and non-magnetic elements, and a rotor of fast rotation with ferromagnetic and non-magnetic elements. At the same time, according to the invention, the magnetic reducer comprises a fixed inductor of magnetic field, arranged outside the tooth-slot area, and the number of ferromagnetic elements of the rotor of fast rotation is equal to the difference of the number of ferromagnetic elements of hollow cylinders of the stator and rotor of slow rotation. Due to availability of non-magnetic rings in the reducer, which connect hollow cylinders of the stator with the magnetic conductor of the stator, and a sealing disc, the reducer is made with tight separation of fast and slow rotation rotors cavities and as capable of torque transfer to a tight volume, and manufacturer of a fast rotation rotor in the form of a hollow cylinder made it possible to improve dynamic characteristics.
EFFECT: development of a reducer with tight separation of cavities of fast and slow rotation rotors, in which there is possibility to transfer torque into a tight volume, improved dynamic characteristics of a contactless magnetic reducer.
SUBSTANCE: axial cascade electric drive comprises two coaxially connected electric motors, besides, magnetic systems of two electric motors are made axial and are arranged in one body and on a common shaft, which is horizontally fixed in bearing units of the body, besides, by one side the stator of one electric motor is rigidly connected to the body, and on its other side between the three-phase winding and the shaft hole there are coils of controlled couplings, which are located oppositely to two rings of large and small diameters from a non-magnetic material, a rotor arranged on the bearing, at the other side of which there are ring-shaped slots, the free space of which is filled with a ferromagnetic powder. At the same time, according to the invention, the rotor of the other electric motor is arranged on the bearing and has a ledge in the form of a wide thin ring from the same material as the rotor itself, and enters the slot of the large diameter of the rotor of the other electric motor, providing when connected to the network of one coil of the controlled coupling rigid connection of the rotor of one electric motor with the rotor of the other electric motor, the stator of which is rigidly connected with the shaft, besides, between the rotor of one and rotor of the other electric motor there is a metal part arranged rigidly in the form of a hollow sleeve, with the ledge entering the slot of small diameter of the rotor of one of electric motors, providing when supplying voltage of the supply network to the other coil of the controlled coupling the rigid connection of the rotor of one of electric motors with the common shaft, which is the output one, and on the rotor of the other electric motor there is a ledge of magnetic material, which enters the body of the ferropowder coupling fixed on the body of the electric drive, besides, additionally comprising a current pickup device, the fixed part of which is rigidly fixed on the body of the electric drive, and the movable part is installed on the shaft and supplies electric energy for the widing of the stator rigidly connected to the shaft.
EFFECT: invention provides for getting high speeds of rotation, close to a double rated one at rated value of the torque value, or getting a double torque at rated speed of rotation for a different range of capacities of an electric drive with simultaneous increase of such drive operation reliability.
2 cl, 1 dwg
SUBSTANCE: magnetic gear comprises the following components installed coaxially on a single shaft: a rotor of quick rotation with permanent magnets and pole tips, on the other shaft by means of a non-magnetic disc there is a rotor of slow rotation installed in the form of at least one hollow cylinder, a stator comprising a magnetic core with teeth on its inner surface and at least one hollow cylinder mechanically connected by its one end to the body via a non-magnetic ring, permanent magnets of the rotor of quick rotation are magnetised tangentially and oppositely and are arranged between wedge-shaped pole tips, hollow cylinders of the stator and rotor of slow rotation have alternating ferromagnetic and non-magnetic elements, directed along the axis of rotation, at the same time the gear is equipped with a bearing shield installed on the shaft of the rotor of quick rotation and tightly and mechanically connected to the other end of the hollow cylinder of the stator arranged between the rotor of quick rotation and the hollow cylinder of the slow rotation rotor.
EFFECT: possibility to tightly separate cavities of rotors of quick and slow rotation, improved conditions of accurate assembly and operation of rotors of quick and slow rotation.
3 cl, 3 dwg
SUBSTANCE: invention refers to cascade electric actuators of rotational movement, which consist at least of two asynchronous motors of the same type, and can be used at creation of electric actuators with controlled rotation speed from nominal to double nominal at constant moment, or actuators with double moment at constant nominal rotation speed, as well as at creation of other types of electric actuators. Controlled cascade electric actuator includes two electric motors coaxially installed in housing, each of which consists of rotor and stator; besides, stator of the first electric motor is fixed on housing, and its rotor is fixed on its shaft; fastening rings two of which are fixed on the housing, and the other one is fixed on shaft of the first electric motor, electromagnetic clutches fixed on the housing of electric actuator, three-phase power supply system; rotor of the second electric motor is movable and installed so that it can be freely rotated relative to its shaft, and stator of the second electric motor is fixed on its shaft. Fastening ring rigidly fixed on housing of controlled cascade electric actuator on which there installed are three fixed friction semi-clutches one of which has the possibility of being pulled in order to fix the friction gasket (installed on the first shaft) of its movable semi-clutch sliding along splined recesses of electric motor shaft with freely rotating rotor; the other semi-clutch has the possibility of being pulled in order to fix to the same friction gasket of its semi-clutch entering the cavity of housing of movable rotor, which is coaxial to the above semi-clutch, and the third semi-clutch has the possibility of being pulled in order to fix to the other friction gasket fixed on the electric actuator housing of its semi-clutch entering the cavity of movable rotor housing, which is coaxial to the above semi-clutch.
EFFECT: improved design of cascade electric actuator due to operation improvement of system of electromagnetic clutches and power supply system of one of asynchronous motors, which provides obtaining of high rotation speeds close to double nominal, at nominal value of moment or obtaining of double moment at nominal rotation speed.
3 cl, 1 dwg
SUBSTANCE: accumulator contains a vacuumised housing, a fly-wheel in the form of a vertical cylindrical tubular rotor with a motor generator set with a stator and a drive disc. The support system is composed of a needle support bearing with a bearing socket in the lower part and a magnetic bearing with a permanent magnet in the upper part of the rotor. The supports rotary elements are attached to the partitions installed inside the rotor tube at a certain distance from its butt ends. The horizontal plane passing through the boundary of interaction between the support rotary and non-rotary elements cross the rotation axis in the unit of the rotor axle bend shape at the operating rotation rate. The accumulator housing is installed into an accumulator assembly.
EFFECT: reduction of aerodynamic losses in the vacuumised housing and losses in the rotor support units.
2 cl, 6 dwg
FIELD: electric engineering.
SUBSTANCE: invention relates to electric engineering, to electric energy and power plants, in particular, and may be used as a drive for all types of transport - land, water, air and space transportation and etc. The proposed propelling agent includes electron discharge device (1), filled with operating substance and electric arc electrodes (2, 3), control (4), operating (6) and polarising (8) electrodes. The induction coil is comprised of windings - primary (11), current (12) and electric arc (13) and core piece (14) having an armature (15) located in the clearance and connected with current coil (12) through three position switch (16). The ends of primary winding (17) are connected with polarising electrodes (8) and with the middle point (18) through sequential circuits of resonance capacitors (9) and with the middle point which is coupled with a cathode (3) and grounded. The electric arc coil (13) is linked with electric arc electrodes (2, 3) through voltage transducer (20) with its input having connections with a.c. power source (22). The control (4) and operating (6) electrodes are coupled with series circuits of resonance capacitors (9) with antiphase polarising (8) electrodes.
EFFECT: increased power, and reliability of electrodynamic propelling agent operation, as well as high reaction to operation control and transport control.
SUBSTANCE: electromechanic variator is made as electrically interconnected generator and electric motor. It is equipped with induction coils and excitation windings installed in alignment, one armature common for electric motor and generator with winding connected to its current collector. Magnetic flows of both induction coils cross armature winding and induce opposed electromotive forces in it. Variator driving shaft is connected to common armature. One of induction coils is stationary while the second one is rotary and connected to driven shaft of variator. Excitation winding of rotary induction coil has independent current collector. Depending on required direction of driven shaft rotation in regard to driving shaft this unit ensures possibility to connect excitation winding of rotary induction coil to independent direct current source or current collector of armature winding. At that excitation winding of stationary induction coil is connected to current collector of armature winding or to independent source of direct current respectively.
EFFECT: functionality enhancement.
4 cl, 2 dwg
SUBSTANCE: device to convert power interaction of a system of permanent magnets and a ferrimagnetic into mechanical energy according to principle of multiple use comprises at least two permanent magnets and a ferrimagnetic, at the same time one of the permanent magnets is installed fixedly, and the second permanent magnet is installed with the possibility of rotation relative to the axis, which is perpendicular to the main vector of polarisation, besides, the ferrimagnetic is connected to an actuating mechanism, which is an energy receiver and is installed with the possibility of reciprocal movement.
EFFECT: making it possible to convert power interaction of a system of permanent magnets and a ferrimagnetic into mechanical energy and further into other types of energy.
5 cl, 3 dwg
SUBSTANCE: invention relates to cascade electric rotary actuator drives and may be used for production of gearless drives with frequency adjusted from 0 to double nominal at stable nominal rotation speed including reversible and other type drives. The proposed controllable cascade electric drive contains two electric motors mounted coaxially on the housing. Each motor is composed of a rotor rigidly mounted on its shaft and a stator. The stator of one of the electric motors is designed as stationary and is mounted on the housing while the second motor stator is capable of free motion relative of the shaft. According to the invention concept, it additionally contains a fixture ring rigidly mounted on the shaft of the stationary stator motor. Mounted on the fixture ring are two e-magnetic clutches one of them capable of contact with the friction plate that has a projection fitting into the movable stator body concavity which is coaxial to the said projection. The other e-magnetic clutch is capable of contact with its friction plate and of connection, with the help of the said plate, to the movable stator electric motor shaft that has a splined recess for the friction plate to fit in. The working areas of the above two friction plates that come in contact with the above e-magnetic clutches are equal to provide for identical performance of the said e-magnetic clutches. Mounted on the drive housing is a third e-magnetic clutch capable of contact with a third friction plate that has a projection fitting into the movable stator body having a concavity which is coaxial to the said projection of the third friction plate.
EFFECT: extension of the range of the cascade electric drive adjustment due to provision for generation of high rotation speeds close to double the nominal one at constant torque value or possibility to generate a doubled torque value at constant rotation speed.
2 cl, 6 dwg
FIELD: electric engineering.
SUBSTANCE: invention is related to electric engineering, to electromagnet mechanisms, and more specifically, to contactless magnetic reducers, and may be used as transmission device in mechanical systems with high resource of operation under impact loads. Magnetic reducer has rotor of fast rotation with permanent magnets (1), magnetised tangentially, wedge-like pole tips (2) with convex profiled surfaces inverted to working gap, non-magnetic bush (3) for fitting onto shaft of fast rotation (4). Magnetic core (5) with evenly installed teeth inverted to working gap, is fixed to body (6), with which hollow cylinders (7) are mechanically connected by non-magnet ring (10), which have alternating ferromagnetic and non-magnet elements. Rotor of slow rotation represents hollow cylinders (8) mechanically connected to shaft of slow rotation (9) by means of non-magnet disk (11) and has alternating ferromagnetic and non-magnet elements. Due to introduction of hollow cylinders of stator and rotor of slow rotation, magnetic reducer is produced with high transmission torque from alternating ferromagnetic and non-magnetic elements.
EFFECT: improvement of mass and dimensional parameters.
FIELD: electrical engineering.
SUBSTANCE: transformer part of the unit has the primary winding connected to three-phase network and the secondary winding connected to z-phase bar winding placed inside z groves of the transformer magnet core at one side closed by the short-circuited ring and at the other side connected to Z bars of the stator winding. Propulsion part of the unit contains asynchronous engine with disc squirrel-cage rotor located between two disc stators with bar windings electrically connected to the secondary bar winding of the transformer and from the other side by closed short-circuited rings. Bars of the secondary transformer winding are connected to Z bars of stator windings by bars used as sealed leads-in and located in a sealed bulkhead.
EFFECT: improvement of energy response and reliability of propulsion-transformer unit with simultaneous extension of its application area.
4 cl, 4 dwg