Reversible magnetic amplifier

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used for power supply of excitation windings of electric machines. Reversible magnetic amplifier comprises two three-phase amplifiers with self-magnetization, in each phase of which two power windings with their leads are connected in series to electrodes of diodes, the second electrodes of triads of which with their leads are combined and form poles connected to diagonals of a bridge, two opposite arms of which are formed by resistors, and the other two – by half-windings of the electric machine, and the other leads of the power windings are combined and are intended for connection to an AC network. Amplifier has control windings. Herewith, parallel to the poles of each amplifier with self-magnetization there is a diode connected.

EFFECT: higher reliability and efficiency.

1 cl, 1 dwg

 



 

Same patents:

FIELD: measurement equipment.

SUBSTANCE: device includes the first magnetic antenna oriented in north-south direction, the second magnetic antenna oriented in west-east direction, the third magnetic antenna with a circular directivity pattern, an electrical antenna, a shaper, the first, the second, the third and the fourth amplifiers, the first, the second, the third, the fourth and the fifth ADC, PC, an unit of a common timing system (GPS or GLONASS), a subscriber communication unit, the first, the second, the third, the fourth and the fifth switches, the first, the second, the third and the fourth DAC, the first, the second, the third, the fourth and the fifth controlled filters, the first and the second mixers, a goniometer, a rotor of the goniometer, a rotor drive, the first and the second field windings, and n search windings.

EFFECT: possibility of frequency and spatial selection of signal sources.

1 dwg

FIELD: electricity.

SUBSTANCE: prevention of alternate voltage input to low-current control circuits is achieved by three-rod single-phase magnetic amplifier with protection against alternate voltage in control circuit, where control winding of the amplifier is positioned in middle rod, and semi-windings of operation power circuit are positioned on two outermost rods of three-rod core out of laminated electrical steel and are wound so that resulting flow generated by them and running through control winding was zero, and a part of middle rod of the magnetic amplifier is replaced with solid ferromagnetic insert out of low-coercivity soft magnetic iron. To increase resistance to alternate magnetic flow, a diamagnetic gap is made between solid ferromagnetic insert and laminated core of the magnetic amplifier.

EFFECT: prevention of alternate voltage input to control winding of single-phase three-rod magnetic amplifier.

FIELD: electricity.

SUBSTANCE: prevention of alternate voltage input to low-current control circuits is achieved by three-rod single-phase magnetic amplifier with protection against alternate voltage in control circuit, where control winding of the amplifier is positioned in middle rod, and semi-windings of operation power circuit are positioned on two outermost rods of three-rod core out of laminated electrical steel and are wound so that resulting flow generated by them and running through control winding was zero, and a part of middle rod of the magnetic amplifier is replaced with solid ferromagnetic insert out of low-coercivity soft magnetic iron. To increase resistance to alternate magnetic flow, a diamagnetic gap is made between solid ferromagnetic insert and laminated core of the magnetic amplifier.

EFFECT: prevention of alternate voltage input to control winding of single-phase three-rod magnetic amplifier.

FIELD: measurement equipment.

SUBSTANCE: device includes the first magnetic antenna oriented in north-south direction, the second magnetic antenna oriented in west-east direction, the third magnetic antenna with a circular directivity pattern, an electrical antenna, a shaper, the first, the second, the third and the fourth amplifiers, the first, the second, the third, the fourth and the fifth ADC, PC, an unit of a common timing system (GPS or GLONASS), a subscriber communication unit, the first, the second, the third, the fourth and the fifth switches, the first, the second, the third and the fourth DAC, the first, the second, the third, the fourth and the fifth controlled filters, the first and the second mixers, a goniometer, a rotor of the goniometer, a rotor drive, the first and the second field windings, and n search windings.

EFFECT: possibility of frequency and spatial selection of signal sources.

1 dwg

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used for power supply of excitation windings of electric machines. Reversible magnetic amplifier comprises two three-phase amplifiers with self-magnetization, in each phase of which two power windings with their leads are connected in series to electrodes of diodes, the second electrodes of triads of which with their leads are combined and form poles connected to diagonals of a bridge, two opposite arms of which are formed by resistors, and the other two – by half-windings of the electric machine, and the other leads of the power windings are combined and are intended for connection to an AC network. Amplifier has control windings. Herewith, parallel to the poles of each amplifier with self-magnetization there is a diode connected.

EFFECT: higher reliability and efficiency.

1 cl, 1 dwg

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