SU1644356A1 - Ac power supply source - Google Patents

Description

one

(21) 4416583/07 (22) 04/28/88 (46) 04/23/91. Bul Number 15

(71) Kuban Agricultural Institute

(72) V.V. Gushcha and N.I.Bogatyrev (53) 621.313.322.621.316.722 (088.8)

(56) Austrian patent number 340523, cl. H 02 K 19/38, 1977.

USSR author's certificate N 395949, cl. H 02 K 19/30, 1956

USSR Author's Certificate No. 868936, cl. H 02 K 19/12, 1980.

(54) AC POWER SUPPLY

(57) The invention relates to electrical engineering and can be used to create alternating current power sources for autonomous power systems. The aim of the invention is to improve the dynamic properties by creating a channel for current compounding. New is the fact that the excitation winding of the exciter and the output of the discrete excitation current regulator are connected to the output of the rectifier, which unites the ends of the generator core in a star, which allows, while retaining all the advantages of a contactless electric machine and the AC output, to provide high performance power supply of nonlinear load of comparable power. 1 il.

The invention relates to electrical engineering and can be used to develop electrical machines, primarily alternating current generator sources, for autonomous power plants operating at a non-linear load that is comparable in power. .

The aim of the invention is to improve the dynamic properties and power quality by creating a current channeling compound.

The drawing shows a diagram of the AC source.

An alternating current power source based on a contactless synchronous generator is made with a combined magnetic and electric circuits. The generator contains on the magnetic core of the stator multiphase core winding 1, to the free

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the ends of which through the rectifier 2 are connected to the excitation winding of the exciter 3. Parallel to the excitation winding of the exciter 3, the output of the discrete regulator 4 of the excitation current is connected to the regulating element 5, for example, a transistor. The input of the discrete excitation current controller is connected to the sensor of the controlled parameter and the capacitors 6, which are connected to the output of the core winding 1 of the generator.

A multi-phase electrically combined winding 7 is located on the rotor magnetic core, closed through a one-half-full rectifier 8. Electrically combined winding 7 simultaneously performs the functions of the exciter core winding and the generator excitation winding.

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The AC power supply operates as follows.

When the rotor of the generator rotates in the electrically combined winding 7, EMF is induced in the generator due to residual induction in the generator. The constant component of the rectified current of the rotor winding 7 generates a magnetizing force and excitation flow of the generator, as a result of which a variable EMF is induced in the core winding 1. A rectified current flows through the excitation winding of the driver 3, which amplifies the generator excitation flow.

The process of self-excitation is limited by the nonlinearity of the magnetic conductivity of the magnetic circuit. The presence of capacitors 6, connected to the output of the core winding 1 of the generator, accelerates and ensures the reliability of self-excitation of the generator, and also improves the shape of the output voltage curve, since through them the higher harmonic components of the generator voltage are closed. At the same time, they are the load for the generator at idle. If the voltage at the output of the core winding 1 of the generator exceeds the nominal value, then the discrete regulator 4 by its regulating element 5 shunts the excitation winding 3 of the exciter, thus reducing the excitation current, which leads to a decrease in the output voltage to the nominal value.

When a motor load of commensurate power is connected to an AC power source, large inrush currents occur, which leads to a sharp decrease in the output voltage. At the same time, the current flowing through the excitation winding 3 of the exciter increases sharply and accelerates the generator. In the case of re-forcing the excitation, a discrete excitation current regulator 4 comes into operation, the regulating element 5 of which reduces the excitation current.

An alternating current power source based on a contactless synchronous generator with a combined magnetic and electrical circuit has improved dynamic properties and power quality and is intended to replace synchronous machines with a brushless excitation system.

Claims (1)

Invention Formula AC power supply, containing a contactless synchronous alternator with combined magnetic and electrical circuits, on the stator magnetic core of which the multiphase root winding of the main generator is located, one of the same terminals of which are intended to be connected to the load, and the exciter winding of the exciter, and on the rotor magnetic core there is a multiphase root winding an exciter connected to a star, the free terminals of which through a rectifier are connected to the excitation winding of the main generator, characterized in that, in order to improve the dynamic properties and power quality by creating a current compounding channel, a second rectifier and a discrete excitation current controller are introduced into it, and the AC input of the second rectifier connected to the free terminals of the core winding of the main generator, and connected to the DC output of this rectifier are connected in parallel the excitation winding of the exciter and the discrete output field current controller, the input of which is intended to be connected with sensors of an adjustable parameter. WH Chg Hh 2 h W & & Yaho