Stabilised axial dc generator

FIELD: electricity.

SUBSTANCE: invention is related to electric engineering, in particular, to electric DC machines. The proposed stabilised axial DC generator comprises a body, a pilot exciter, an exciter and the main generator, in which an inner magnetic conductor, a side magnetic conductor with one active end surface and a side magnetic conductor with two active end surfaces are arranged as axial. At the same time, according to this invention, into slots of the side axial magnetic conductor with two active end surfaces at the side of the inner axial magnetic conductor there is an additional winding of excitation exciter, and in the lower part of the generator body there is a voltage controller comprising a metre of voltage deviations, a preliminary amplifier, a unit of power amplification and a power part. The metre of voltage deviations is connected to the output voltage of the generator, and the additional winding of the excitation exciter is connected to a power part of the voltage controller.

EFFECT: expanded area of application of a generator due to stabilisation of output voltage.

2 dwg

 

The invention relates to electrical engineering, in particular to electrical machines DC, and can be used, for example, to convert mechanical energy of rotation into electrical energy, DC.

Known brushless (brushless) DC generator (see Kashin AM, Kirillov, G., Raklo AV Aircraft equipment aircraft, Part 1: Ministry of defence Grew. Federation Of Red. the Supreme. military. Aviat. Uch-school pilots. - Krasnodar: KWAME, 2006, pp.37-39), comprising a housing in which one shaft has three cylindrical electrical machines design: podozritel - synchronous magnetoelectric machine with rotating inductor consisting of permanent magnets with radially directed magnetic field, and still working winding of podozrevala; pathogen - three-phase synchronous machine with stationary field winding of the exciter and rotating the working winding of the exciter; main generator three - phase synchronous machine with a rotating field winding and a fixed working winding of the generator and three-phase rectifier.

However, the technology of manufacture of such a DC generator is complex due to the need for punching sheets of magnetic circuits of the stator and rotor, having to perform the wrapping papers inside cylindric the ski stator, and the quality produced by the generator of electric energy is not high enough due to the high ripple of the rectified voltage. In addition, the cost of such a generator is high due to the large consumption of electrical steel that is associated with a high percentage of its waste for stamping.

Closest to the claimed invention to the technical essence and the achieved technical result is the axial contactless DC generator (U.S. Pat. Of the Russian Federation No. 2402858), comprising a housing; podozritel consisting of permanent magnets inductor of podozrevala magnetic circuit with the operating winding of podozrevala; pathogen consisting of a magnetic circuit with the field winding of the exciter magnetic circuit with the operating winding of the exciter; and a base generator comprising a magnetic circuit with the field winding of the main generator magnetic circuit with the operating winding of the main generator mounted on the same shaft. In known axial DC generator permanent magnet inductor of podozrevala and the core grooves are stacked coil podozrevala, exciter and main generator, axial performed, and also the side axial magnetic rigidly mounted in the housing, and permanent magnets inductor of podozrevala and the interior is s axial magnetic rigidly mounted on the shaft for rotation relative to the side axial magnetic circuits, while permanent magnets inductor of podozrevala installed with one end side of the axial magnetic core, and an inner axial magnetic circuit is installed between the side axial magnetic circuits. Internal axial magnetic core and the side axial magnetic core, with the end face of which is equipped with permanent magnets inductor of podozrevala made with two active face surfaces with grooves, and the other axial side of the magnetic core is made with one active face surface with grooves. In the lateral grooves of the axial magnetic circuit with two active face surfaces from permanent magnets of podozrevala laid multiphase operating winding of podozrevala, and on the opposite side of the stacked single-phase winding of the exciter, which is connected to the operating winding of podozrevala through the multiphase full-wave rectifier. In the grooves of the inner axial magnetic circuit from the winding of the exciter laid multiphase operating winding of the exciter, and on the opposite side of the stacked single-phase winding of the main generator that is connected to the operating winding of the exciter through a multiphase full-wave rectifier. In the lateral grooves of the axial magnetic circuit with a single active turcologist laid multiphase operating winding of the main generator, which is connected to a multi-phase rectifier.

However, the output voltage U of the generator depends on the frequency of rotation of the permanent magnet inductor of podozrevala and internal axial magnetic working with multiphase winding of the exciter and the single-phase excitation winding of the main generator

U=Cw,

where C is the structural coefficient, w is the frequency of rotation, f is the magnetic flux excitation.

It is possible to install the drive constant speed affects the weight and dimensions of the generator, and also reduces the reliability of his work.

The technical result of the claimed invention is the expansion of the scope of the generator due to the stabilization of the output voltage.

The technical result is achieved by the fact that in the lateral grooves of the axial magnetic circuit with two active end surfaces of the inner axial magnetic fit the additional winding of the exciter, and in the lower part of the housing of the generator set voltage regulator, comprising measuring variations of voltage, preamplifier, block power amplifier and power, the meter deviation voltage included in the output voltage of the generator, and the secondary winding of the exciter is connected to the forces of the front part of the voltage regulator.

The present invention, performing the function of DC generator, as a prototype, at the same time, in contrast, allows to extend the scope of the generator due to the stabilization of output voltage.

Figure 1 shows the General view of the proposed stable axial DC generator in section, figure 2 - electric scheme proposed stable axial DC generator.

Stable axial DC generator includes: a housing 1, a permanent multi-pole magnet 2 inductor of podozrevala, side axial magnetic core 3 with a multiphase winding 4 anchors podozrevala, single-phase winding 5 of the exciter and the additional winding 6 of the exciter; inner axial magnetic core 7 with a multiphase winding 8 of the armature of the exciter and the single-phase excitation winding 9 of the main generator, side axial magnetic core 10 with multi-phase (figure 2 - devyatietazhnoe) winding 11 of the armature of the main generator, the shaft 12, mounted in bearing assemblies 13 and 14 and is rigidly connected with a permanent multi-pole magnet 2 inductor of podozrevala through the disk 15 and with internal axial magnetic core 7 by a drive 16.

Single-phase excitation winding 5 of the exciter is connected to agiasmos winding 4 anchors podozrevala through the multiphase full-wave (figure 2 - devyatietazhnyy) rectifier 17. Single-phase excitation winding 9 of the main generator is connected to the polyphase winding 8 of the armature of the exciter through a multi-phase (figure 2 - devyatietazhnyy) a full-wave rectifier 18. Multiphase winding 11 of the armature of the main generator is connected to a multiphase (figure 2 - deviatefrom) the full-wave rectifier 19.

In the lower part of the housing of the generator set voltage regulator 20 (figure 1, figure 2), consisting of measuring variations of voltage 21 (2), the pre-amplifier 22, block power amplifier 23 and the power section 24, while measuring variations of voltage 21 is included in the output voltage U of the generator (figure 2), and the secondary winding 6 of the exciter is connected to the power section 24 of the voltage regulator.

The parameters of the elements of the gauge variations of voltage 21 is chosen so that the equilibrium of the bridge consisting of resistors R1, R2, R3 and Zener diode VD1, occurs when the output voltage of the generator is much smaller than its nominal value. Therefore, during normal operation of the generator potential point 6 exceeds the potential of the point a and with the increase of the output voltage of the generator, the magnitude of the error signal ΔU=φ(U-UEbetween the output voltage U of the generator and the reference voltage UEStabilit what she VD1 increases.

This continuous time signal is amplified in pre-amplifier 22 a DC amplifier transistors VT2 and VT3 with a current regulator transistor VT4.

The signal from amplifier 22 is fed to the input pulse-width modulator block power amplifier 23 where it is converted into a sequence of voltage pulses. The duration of these pulses is determined by the MDS generated by the control winding Wy magnetic amplifier block power amplifier 23, the period of repetition - frequency power inline static inverter SI.

Stable axial DC generator works as follows. During the rotation of the permanent multi-pole magnet 2 inductor of podozrevala and internal axial magnetic core 7 with a multiphase winding 8 of the exciter armature phase winding 9 of the excitation of the main generator magnetic flux multipole permanent magnet 2 of the inductor of podozrevala interacts with a multiphase winding 4 anchors podozrevala laid in the grooves of the side axial magnetic core 3, is rigidly mounted in the generator housing, and brings it multiphase system EMF, which is rectified polyphase full-wave rectifier 17 and fed to the single-phase winding 5 of the exciter, were placed in the lateral grooves called axial seamount is tion of the magnetic circuit 3. In single-phase winding 5 of the exciter generates a magnetic flux.

Created magnetic flux interacts with the polyphase winding 8 of the armature of the exciter laid in the grooves of the inner axial magnetic circuit 7, and brings it multiphase system EMF, which is rectified polyphase full-wave rectifier 18 and fed to the single-phase excitation winding 9 of the main generator, arranged in the grooves of the inner axial magnetic core 7. The magnetic flux of the single-phase winding 9 of the main generator interacts with a multiphase winding 11 of the armature of the main generator, arranged in the lateral grooves of the axial magnetic core 10, and induces in it a multiphase system EMF, which is rectified polyphase full-wave rectifier 19 and fed into the network.

Stabilization of the output voltage U of the generator is as follows. If the output voltage U of the generator is changed (for example, when the change speed of the input shaft or the load changes), it changes the potential difference between points a and b (figure 2), i.e. changing the value of the error signal ΔU=φ(U-Ue). For example, with the lowering of the output voltage of the generator signal deviation meter deviation voltage 21 (the potential difference between points a and b) reduces energy is camping, which leads to the reduction of current in the control winding wymagnetic amplifier block power amplifier 23. The reduction of the magnetomotive force (MMF)produced by the control winding wymagnetic amplifier, leads to the increase of pulse duration on the resistor R7, as the load of the magnetic amplifier. These pulses control the operation of the transistor VT5 amplifier block power amplifier 23. The transistor VT5 controls the operation of transistor VT1 power section 24 of the voltage regulator. Increasing the duration of the pulses across the resistor R7, the open state of the transistors VT5 and VT1 increases, which increases the average value of the excitation current in the secondary winding 6 of the pathogen. This creates an additional magnetic flux directed in accordance with the magnetic flux created by the single-phase winding 5 of the exciter. By the principle of superposition of the magnetic fields of the magnetic fluxes generated by the coil 5 and the additional winding 6 of the exciter, are summarized. Therefore, we direct that the total magnetic flux in the winding 8 of the exciter armature EMF increases, and thus increases the current in the excitation winding 9 of the main generator and the created magnetic flux. EMF generator created this thread in the winding 11 of the anchor jus the th generator, consequently, the output voltage U increases, tending to the specified value.

Stable axial DC generator, comprising a housing, podozritel, the exciter and the main generator whose internal magnetic side of the magnetic core with one active end surface and the side magnetic circuit with two active end surfaces of the axial performed, characterized in that the grooves in the side axial magnetic circuit with two active end surfaces of the inner axial magnetic laid the additional winding of the exciter, and in the lower part of the housing of the generator set voltage regulator, comprising measuring variations of voltage, preamplifier, block power amplifier and power, the meter deviation voltage included in the output voltage of the generator and the additional winding of the exciter is connected to the power section of the voltage regulator.



 

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