RU128040U1 - Electric machine source of medium power - Google Patents

Electric machine source of medium power Download PDF

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Publication number
RU128040U1
RU128040U1 RU2013102330/07U RU2013102330U RU128040U1 RU 128040 U1 RU128040 U1 RU 128040U1 RU 2013102330/07 U RU2013102330/07 U RU 2013102330/07U RU 2013102330 U RU2013102330 U RU 2013102330U RU 128040 U1 RU128040 U1 RU 128040U1
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Russia
Prior art keywords
output
connected
synchronous generator
phase
motor
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RU2013102330/07U
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Russian (ru)
Inventor
Николай Петрович Кириллов
Владимир Иванович Полянский
Юлия Павловна Плужникова
Александр Викторович Чемусов
Платон Сергеевич Шестаков
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Николай Петрович Кириллов
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Publication of RU128040U1 publication Critical patent/RU128040U1/en

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Abstract

A medium-power electric machine source comprising functionally connected battery, a primary motor, a permanent synchronous generator with permanent magnets and AC output buses, characterized in that a three-phase asynchronous motor made with a first end shaft and a second end shaft is installed as a primary motor, and DC bus and a three-phase inverter, as well as an additional synchronous generator with a constant magnets and a three-phase rectifier, the first end shaft of a three-phase induction motor connected mechanically to the shaft of an additional synchronous generator with permanent magnets, the output of which is connected to the input of a three-phase rectifier, the output of which is connected to DC buses, and the second end shaft of the said motor is connected mechanically to the shaft main synchronous generator with permanent magnets, the output of which is connected to the output bus AC.

Description

The utility model relates to the field of electrical engineering and can be used as a stand-alone electric machine source in power supply systems of medium power for various purposes.

Known electric machine source containing a direct current source, a primary engine, which is used as a direct current motor with parallel excitation, the main synchronous generator with permanent magnets, combined with the specified motor by a common shaft, and output buses, and the said motor is connected to a direct current source, and the output of the specified generator is connected to the output buses [1]. This source has been widely used in power systems of autonomous facilities due to the simplicity of the circuit and design, instant availability and high quality of electric energy, but it also has a number of disadvantages, among which are relatively low power and relatively low reliability due to the collector-brush primary engine assembly.

The technical result of the utility model is to increase the output power of the source.

The required technical result is achieved by the fact that in a medium-power electromachine source containing functionally connected storage battery, a primary motor, a main synchronous generator with permanent magnets and AC output buses, a three-phase asynchronous motor made with the first end shaft and the second is installed as the primary motor The DC shaft and three-phase inverter, as well as an additional one, are introduced by the end shaft and between the battery and the prime mover th synchronous generator with permanent magnets and a three-phase rectifier, the first end shaft of a three-phase asynchronous motor connected mechanically to the shaft of an additional synchronous generator with permanent magnets, the output of which is connected to the input of a three-phase rectifier, the output of which is connected to DC buses, and the second end shaft of the named motor mechanically connected to the shaft of the main synchronous permanent magnet generator, the output of which is connected to the output AC buses.

The drawing shows a structural diagram of an electric machine medium power source.

The source contains a battery 1 with an output 1-1, a DC bus 2, to which a three-phase inverter 3 is connected with an input 3-1 and an output 3-2, a three-phase asynchronous motor 4 with a first end shaft 4-1 and a second end shaft 4- 2, the main synchronous generator with permanent magnets 5 with an output of 5-1, the output buses of alternating current 6, an additional synchronous generator with permanent magnets 7 with an output of 7-1, a three-phase rectifier 8 with an input of 8-1 and an output of 8-2, and the output 1-1 battery 1 is connected to the DC bus 2, which the input 3-1 of the three-phase inverter 3 is connected, the output 3-2 of which is connected to the input of the three-phase asynchronous motor 4. The first end shaft 4-1 of the indicated motor 4 is connected mechanically to the shaft (not shown) of the additional permanent magnet generator 7, output 7 -1 which is connected to the input 8-1 of the three-phase rectifier 8, the output 8-2 of which is connected to the DC bus 2. The second end shaft 4-2 of the named motor is mechanically connected to the shaft (not shown) of the main synchronous permanent magnet generator 5, output5-1 which is connected to the output busbars AC 6.

All elements of the structural circuit are serially produced by domestic industry, while the voltage of a three-phase inverter is set to the requirement of the value of the distortion coefficient of the sinusoidality, K U ≤5% and the value of the steady-state voltage deviation δU U = ± 5% U nom . The first condition must be fulfilled so that the stator winding of the three-phase asynchronous motor 4 is not overheated by higher harmonics, and the second condition must be fulfilled due to the dependence of the electromagnetic moment of the motor on the square applied to the voltage stator winding. Since the additional synchronous generator with permanent magnets 7 is a source for recharging the battery 1, the voltage frequency in this generator is 1000 Hz in order to reduce the amplitude and ripple frequency of the rectified voltage at the output 8-2 of the three-phase rectifier 8. The increase in frequency can significantly reduce weight and size characteristics of the electromagnetic elements of a three-phase rectifier 8 and obtain the required value of the ripple coefficient of the rectified voltage without applying smoothing filters. Three-phase inverter 3 and rectifier 8 are made according to standard schemes of similar converters. The power of the main permanent magnet generator reaches 100 kVA, while the generator efficiency is 95%, and the specific gravity reaches 0.35 kg / kVA. The power of an additional synchronous generator with permanent magnets 7 reaches 0.1 power of the main generator 5.

The source works as follows.

When you turn on the key (not shown) connecting the output 1-1 of the battery with tires 2, the battery 1 starts to discharge and its voltage from the output 1-1 goes to the DC bus 2 and from the latter to the input 3-1 of the three-phase inverter 3 In the inverter 3, the DC voltage is converted into an alternating three-phase sinusoidal voltage, which is supplied to the input (not indicated) of the three-phase asynchronous motor 4. The specified motor starts and its first end shaft 4-1 and the second end shaft 4-2 come into rotation, whenthis rotation of the shaft 4-1 is transmitted to the shaft of an additional synchronous generator with permanent magnets 7 and from the output 7-1 of the last voltage is fed to the input 8-1 of a three-phase rectifier 8. In the specified rectifier three-phase alternating voltage of high frequency is converted to a constant voltage with a small ripple factor , after which it from the output 8-2 of the three-phase rectifier 8 enters the DC bus 2.

Thus, the use of a three-phase asynchronous motor and the introduction of an additional synchronous generator can significantly increase the power of the main generator with a relatively long battery life.

Sources taken into account:

[one]. Lipay B.R., Solomin A.N., Tyrichev P.A. Electromechanical systems. M., MPEI, 2008, p. 39, Fig. 2.5.

[2]. Balagurov V.A., Galteev F.F. Permanent magnet electric generators. M., Energoatomizdat, 1988, p. 10.

Claims (1)

  1. A medium-power electric machine source comprising functionally connected storage battery, a primary motor, a permanent synchronous generator with permanent magnets and AC output buses, characterized in that a three-phase asynchronous motor made with a first end shaft and a second end shaft is installed as a primary motor, and DC bus and a three-phase inverter are introduced between the battery and the prime mover, as well as an additional synchronous generator with a constant magnets and a three-phase rectifier, the first end shaft of a three-phase asynchronous motor connected mechanically to the shaft of an additional synchronous generator with permanent magnets, the output of which is connected to the input of a three-phase rectifier, the output of which is connected to DC buses, and the second end shaft of the said motor is connected mechanically to the shaft main synchronous generator with permanent magnets, the output of which is connected to the output bus AC.
    Figure 00000001
RU2013102330/07U 2013-01-18 2013-01-18 Electric machine source of medium power RU128040U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2013102330/07U RU128040U1 (en) 2013-01-18 2013-01-18 Electric machine source of medium power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2013102330/07U RU128040U1 (en) 2013-01-18 2013-01-18 Electric machine source of medium power

Publications (1)

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RU128040U1 true RU128040U1 (en) 2013-05-10

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RU2013102330/07U RU128040U1 (en) 2013-01-18 2013-01-18 Electric machine source of medium power

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU184526U1 (en) * 2018-01-29 2018-10-30 Федеральное государственное унитарное предприятие "Государственный научно-исследовательский институт авиационных систем" (ФГУП "ГосНИИАС") Offline power supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU184526U1 (en) * 2018-01-29 2018-10-30 Федеральное государственное унитарное предприятие "Государственный научно-исследовательский институт авиационных систем" (ФГУП "ГосНИИАС") Offline power supply

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MM1K Utility model has become invalid (non-payment of fees)

Effective date: 20140119