Two-dimensional electrical machine-generator

FIELD: electricity.

SUBSTANCE: invention can be used as electromechanical converter of mechanical energy delivered to one machine input (mechanical) and dc electric energy simultaneously delivered to its other input (electrical) into integrated dc electric energy. In electrical machine containing armature with winding and brush-collector unit of dc machine and rotor with short-circuited winding, over rotor winding of asynchronous motors that are able to rotate around each other, according to this invention a generator winding is additionally laid in armature slots. Output of this winding is connected by means of contact rings and brushes with net of alternating current consumers.

EFFECT: implementation of summing and converting of mechanical and dc electrical energy into electrical energy with simultaneous improvement of electrical energy parameters stability at output.

3 dwg

 

The invention relates to electrical engineering and can be used as an Electromechanical transducer mechanical energy supplied to one (mechanical) input machine, and electric power of direct current, at the same time supplied to the other input (electrical) in the total electrical energy of alternating current.

Known rotary DC amplifier (Kopylov I.P. Electric machine. M.: Energoatomizdat, 1986, s-333), which increased electric power of direct current due to the applied mechanical energy.

However, this machine, being on the principle of steering electric power DC due to mechanical energy, cannot operate as an alternator, which converts two dissimilar source of energy, because of its purpose, because it is essentially an Electromechanical energy Converter DC.

A prototype of this invention is the input electrical machine (patent RF №2091967, 1997, bull. No. 27, the authors Krasavin CENTURIES, Hitova T.B., Gitow KAPYSHEV).

Input electrical machine consists of laminated armature cores and the brush-commutator machine DC machine, placed concentrically in the annular laminated stack magnetophon the d of the rotor winding type rotor windings of asynchronous machines (for example, squirrel cage or wound rotor) and shrunk into the body, with the possibility of rotation around the laminated armature.

However, such a machine can only operate in motor mode, as a mechanical power amplifier or as a DC generator, which sharply limits the scope of application this machine.

In some cases, for example in alternative energy, when you integrated the use of two renewable energy sources (RES), (e.g., Solar and wind with inherent features is uneven and the stochastic nature of the flow of energy), within the same power system required the design of the Electromechanical energy Converter, which could convert two dissimilar kinds of energy, producing output total electrical energy of alternating current. The need for this type of Converter is the modern requirements of unconventional energy to the Electromechanical energy converters. Thus, in alternative energy has now developed the practice of traditional (classical) energy converters, generators, AC and DC, which convert one kind of energy (energy of Sun, wind and others) into electricity. However, this approach is, as shown ineffective due to the natural characteristics of renewable energy sources, namely the unpredictable nature of the flow of energy and the irregularity of its receipt. Figure 1 shows a graph of the intensity of Solar energy (C) and wind (B) as a function of time, is built based on average meteorological data during the day.

As can be seen from the graph, the solar and wind energy (+) during the day unequally, and the intensity of Solar energy and wind energy varies as if out of phase: during the night the main supplier of energy is the Sun, in the evening, night and morning wind. Simple summation of the energy of the Sun and wind (Ccf+cf) gives the curve is much smoother compared with the curves of the distribution of each energy source separately (+)cf. From the graph also shows that the total average energy of the Sun and the wind much more than the sum of the average energies of each energy source separately.

Similar picture is observed during the year. Figure 2 shows a graph of the intensity distribution of solar and wind energy during the year. It shows that the highest intensity of solar energy falls on the summer period, while at the same time there is a recession intensivnostyakh energy. In the winter period, on the contrary, the intensity of solar energy is low and the intensity of the wind reaches its maximum.

From figure 2 it is seen that the summation of the energy of the sun and wind during the year gives more significant results compared with the same sum during the day, i.e. the total energy curve during the year has smoother character compared to the daily, although fluctuations in the intensity of energy both sources separately are also pronounced.

From the foregoing it becomes apparent that the most rational solution to the issue of RES is a parallel development of both Solar and wind in the framework of the Electromechanical energy Converter with the aim of obtaining higher (almost twice) energy and alignment of natural fluctuations of its receipt.

Thus it is possible to achieve more stable operation and smaller oscillations at the input of energy. To date, such transducers are not.

This invention solves the problem of summation and transformation of mechanical energy (e.g. wind power) and power constant current (for example, Solar energy coming from the photoelectric converters in electric energy of three-phase (or more), AC is more stable electrical energy output, than in the case of the traditional Electromechanical energy converters.

This is achieved by the fact that around a laminated armature winding, and the brush-commutator machine DC machine and the rotor squirrel-cage winding type rotor windings of asynchronous motors, with the ability to rotate freely relative to each other, the slots of the armature additionally laid generator winding of an alternating current, the output of which is by using slip rings and brushes connected with a network of consumers alternating current.

Figure 3 shows in section a General view of the proposed two-dimensional electrical machine generator (DEM-G). Two-dimensional authors called machine based on well-established in the literature [1, etc.] terminology: the machine has two rotating parts and two degrees of freedom - such machines in the world practice is called two-dimensional.

DEM-G contains the anchor 1 DC machine conventional design with coil 2 placed in the grooves 3, the collector 4 with brushes 5, to which is connected the wires 6. Also in the grooves 3 are additionally stacked three-phase generator winding AC 10, the output of which is 17 by means of three contact rings 16 and three brushes 15 is connected with a network of consumers AC. Brush 15 by wires 14 connect the coil 10 with AC order p is passing the generated electricity to consumers. In case 7 concentrically with the anchor plated laminated magnetic core of the rotor 8, the grooves of which laid the winding 9 to the rotary type winding squirrel cage induction motors. Shields 11 with bearings 12, 13 and the shaft 18 to provide a concentric location of the anchor 1 and the rotor 8 and the possibility of their simultaneous rotation.

Two-dimensional electrical machine - generator - works as follows. When applying a constant current (e.g., photovoltaic cells) through the brushes 5 and the collector 4 of the coil 2 anchor 1 is flown shock. This creates a magnetic flux of the reaction anchor fand. If the shaft 18 together with the rotor 8 and the coil 9 will come into rotation under the action of some externally applied moment (e.g. wind turbines), then under the action of the magnetic flux fandin the winding 9, as in an ordinary winding of an induction motor, induced EMF and electric current flows, creating in its own magnetic field rotor fp. When the interaction between flows of fandand fpoccurs electromagnetic torque and the armature of the machine will come up in the rotation frequency nand.

As the field produced by the rotor winding fprotates in the opposite direction to the direction of rotation of the rotor at the same speed in space relative to the brushes motionless, sledovatel is but in the air gap, there is a fixed field f, which is the result of the addition of fields reaction anchors fandand rotor fp. If there motionless in space of the magnetic field and rotating parts in it design it can be used for the generation of electric power of alternating current.

To this end in the slots of the armature is additionally stacked three-phase (or more, depending on the desired number of phases) generator winding AC 10, the output of which (see figure 3) with three slip rings 16 and three brushes 15 is connected with a network of consumers alternating current through wires 14.

In a three-phase winding 10, rotating in a stationary magnetic field generated by the flow fandand fpaccording to the law of electromagnetic induction, induced EMF is equal to

where Wp- the number of turns of the rotor winding, ψto- magnetic flux linkage of the coil winding 10. Basically, the rotor winding in this case is caused by a generator that converts the mechanical energy supplied to the rotor (e.g., wind turbines) in the energy of the magnetic field.

In the described processes is the sum of mechanical and electrical energy to the DC input, transformation and output on the output total electrical power and AC.

The machine is manufactured and tested. Experimental studies have shown promising applications of generators of this type in the Autonomous power supply system, based on the integrated use of renewable energy sources such as Solar and wind.

Two-dimensional electrical machine is a generator containing the armature winding and the brush-commutator machine DC machine and the rotor squirrel cage winding type rotor windings of asynchronous motors, with the ability to rotate freely relative to each other, characterized in that the slots of the armature additionally laid generator winding of an alternating current, the output of which is by using slip rings and brushes is connected to AC power.



 

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