Single-phase-three-phase transformer with rotary magnetic field
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used for production of stabilised transformers with rotary magnetic field. Single-phase-three-phase transformer incorporates two primaries arranged on toroidal part and spaced apart by 90°. The windings inputs are interconnected via a phase-shift capacitor. Three secondaries are arranged on the core spaced apart by 120°. Every primary contains the first and second coil groups made up of four coils laid in 32 slots. The output of the first coil group of every winding is connected to the output of the second coil group. The input of the first primary is connected to the power source first output and, via the phase-shift capacitor, to the input of the second primary. The outputs of the primaries are interconnected and connected to the second output of power supply. Every secondary consists of 12 coils laid in 36 slots.
EFFECT: optimised design of transformers with rotary magnetic field.
4 dwg
The invention relates to electrical engineering and is intended to create a stable transformers with a rotating magnetic field.
Known transformer (see sadera G.P., stuttering PN. Multi-function transformer means secondary power supply. M.: Radio and communication, 1989, p.88-89, Fig) has drawbacks: low system performance voltage regulation, low quality of electricity, which requires improving the mass of the output filter.
The closest technical solution is single-phase three-phase transformer with a rotating magnetic field, containing two primary windings placed on the toroidal part and shifted in the space between an angle of 90°, the beginning of which is connected through a phase-shifting capacitor and three secondary windings placed on the core, shifted one relative to the other at an angle of 120°and their conclusions are formed symmetrical three-phase system voltage alternating current (RF patent No. 2217857, NM 5/27, 5/297, NR 7/42, 2003).
The main disadvantage is that is not defined, the design of the magnetic system single-phase three-phase transformer with a rotating magnetic field.
The technical solution of the task is to determine the optimal design of the windings of the transformer with a rotating magnetic the m field.
This object is achieved in that in the single-phase three-phase transformer with a rotating magnetic field are two of the primary winding placed on the toroidal part and shifted in space relative to each other at an angle of 90°, the beginning of which is connected through a phase-shifting capacitor and three secondary windings placed on the core shifted relative to each other at an angle 120°, according to the invention, each primary winding includes first and second coil groups, consisting of 4 coils laid in grooves 32, and the end of the first coil group of each of the windings connected to the end of the second coil group, the first primary winding connected to the first output power source and through the phase-shifting capacitor to the beginning of the second primary winding, and the ends of the primary windings are connected together and connected to the second output of the power source, each of the three secondary windings consists of 12 coils laid in grooves 36.
The novelty of technical solutions is that determined the design of the magnetic system single-phase three-phase transformer with a rotating magnetic field.
According to scientific-technical and patent literature not known to the authors declare signs aimed at achieving our tasks and, and this decision does not follow clearly from the prior art, which allows to make a conclusion about compliance solutions to the invention level.
The invention is illustrated by drawings, where figure 1 shows magnetofluid transformer with a rotating magnetic field; figure 2 shows the electrical circuit of the transformer with a rotating magnetic field; figure 3 - toroidal part; figure 4 - diagram of the windings placed on the core of the transformer with a rotating magnetic field.
Single-phase three-phase transformer with a rotating magnetic field contains a toroidal part 1 with two primary windings 2 and 3, pins 4, 5 and 6, 7 respectively, are located in space relative to each other at an angle of 90° (figure 2). Core 8 contains three secondary windings 9, 10 and 11 are shifted one relative to the other at an angle of 120°, beginning and end are marked 12 and 13, 14 and 15, 16 and 17. A transformer with a rotating magnetic field has findings 18 and 19 for connecting the power source, the phase-shifting capacitor 20, to the outputs 12, 14 and 16 connected load. The primary winding of the transformer with a rotating magnetic field is placed in 36 slots toroidal part (3) and contain two coil groups 21 and 23, 22 and 24, each of which contains six coils are wound concentrically, and to the EC coil group 21 is connected to the end of the coil group 23, and the beginning is connected to pins 18 and 19 (figure 2), the end coil group 22 is connected to the end of the coil group 24, and the beginning is connected to pins 6 and 7. Between pins 4 and 6 includes phase-shifting capacitor 14. The secondary winding of the transformer with a rotating magnetic field is placed in 36 and grooves on the core (figure 4) and contains three loop winding with two coil groups 12 and 13, 14 and 15, 16 and 17, respectively.
A transformer with a rotating magnetic field is as follows. When connecting the power supply to the pins 18 and 19 to the primary windings 2 and 3, as well as through the phase-shifting capacitor 20 (figure 2) will leak current in the windings creates a rotating magnetic field. In the secondary windings 9, 10 and 11 will be picking up a symmetric system EMF AC.
Using the proposed design of the magnetic system single-phase three-phase transformer with a rotating magnetic field distinguishes from the known technical solutions transformers, as with single-phase voltage obtained three-phase symmetrical system EMF AC.
Single-phase three-phase transformer with a rotating magnetic field, containing two primary windings placed on the toroidal part and shifted in space relative to each other at an angle of 90°, the beginning of which is connected between the Wallpaper through the phase-shifting capacitor and three secondary windings placed on the core shifted relative to each other at an angle 120° , wherein each primary winding includes first and second coil groups, consisting of 4 coils laid in grooves 32, and the end of the first reel group, each of the windings is connected to the end of the second coil group, the first primary winding connected to the first output power source and through the phase-shifting capacitor to the beginning of the second primary winding, and the ends of the primary windings United among themselves and connected to the second output of the power source, each of the three secondary windings consists of 12 coils laid in grooves 36.
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FIELD: electrical engineering.
SUBSTANCE: invention pertains to electrical engineering, to converting technology and is meant for converting electrical energy of three- and single-phase voltage and current. The alternatives of devices for converting electrical energy provide for coupling modes of operation of three-phase networks and single-phase consumers, for which requirements of symmetry of three-phase voltage and current are sufficiently met. Due to the linearity of the characteristics which are part of the converter elements, the proposed schematic circuit diagrams, the set of elements of the device and the ratio of parameters of elements, the quality of electrical energy in the electrical networks and the consumer is increased. This means the standard which is necessary for electromagnetic compatibility of sources and receivers of electrical energy is achieved. The alternatives of devices for reversible conversion of electrical energy of three-phase and single-phase voltage and current consists of a single-phase transformer or autotransformer, three-phase transformer, two units of ballast reactive elements - capacitors and inductors, and a unit for controlling the ballast reactive elements and control of the symmetric mode of operation of the converter. Control of the symmetric mode of operation of the converter and control of the reactive ballast elements is achieved by measuring the amplitude of single-phase currents and voltages and the shift angle between them and depending on the value and sign of deviation of measured values of the effect on parameters of reactive ballast elements.
EFFECT: increased power during operation from three-phase primary networks with symmetric loading of the latter, wider functional capabilities due to more alternatives of designing power supply circuits for single-phase consumers, symmetrical power supply to three-phase consumers from a single-phase primary network.
8 cl, 17 dwg
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FIELD: electrical engineering.
SUBSTANCE: invention pertains to electrical engineering and can be used as an input organ for protective and automation devices for power supply systems. The single-phase transformer has four primary coils on a toroidal core, ballast resistors and an inductor, multi-phase secondary coils. The beginning of the first coil is joined to the end of the second coil, forming the first input of the device. The end of the first coil is joined to the end of the third coil, the end of the second coil to the end of the fourth coil. The end of the third coil is joined to the ballast inductor, and the beginning of the fourth coil is joined to the ballast resistor, the other ends of which form the second input of the device when joined. To obtain a rotating magnetic field, the first, second, third and fourth coils are on the toroidal magnetic core with shift of 90 degrees from each other. The number of turns in the first and fourth coils is more than twice the second and third coils.
EFFECT: elimination of phase shifting elements when converting single-phase voltage into multi-phase voltage.
1 dwg
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FIELD: electrical engineering; transformer manufacture; multiphase static electrical energy converters.
SUBSTANCE: proposed multiphase transformer has internal spiral toroidal core built of two equal-height rings joined together along butt-end rough surfaces by means of adhesive. Bonded to butt-end ground surfaces of mentioned rings are rectangular-shape laminated teeth. Two lateral spiral toroidal cores ground on one butt-end abut against teeth by their ground ends. Multiphase secondary winding is wound on internal magnetic core and placed in slots between teeth, Three-phase primary winding coils are similar coils whose turns are wound on teeth. Coils are interconnected within each phase in series so that magnetic flux set up due to them within internal magnetic core equals sum of magnetic fluxes set up by them in teeth.
EFFECT: enhanced stability of characteristics, facilitated manufacture at high efficiency.
1 cl, 5 dwg
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FIELD: electrical engineering; multiphase semiconductor converters such as inverters, rectifiers, and other semiconductor devices.
SUBSTANCE: proposed multiphase transformer has intermediate laminated core and two lateral spiral cores abutting against butt-ends of intermediate laminated core through nonmagnetic spacers. Intermediate laminated core is made of stacks of two different cold-rolled electric steel sections with slots in butt-end, inner, and side surfaces accommodating three-phase winding enclosing intermediate laminated core yoke. Central part of intermediate laminated core has slots at outer and inner surfaces of laminated core. Lateral spiral cores abutting against intermediate laminated core have slots in side surface abutting against intermediate laminated core accommodating two circular windings with taps, each enclosing respective lateral spiral core.
EFFECT: enhanced electromagnetic compatibility, reduced power loss, enhanced efficiency.
1 cl, 4 dwg
![](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="70" height="62"><rect fill-opacity="0"/></svg>)
FIELD: electrical engineering; multiphase semiconductor converters such as rectifiers, inverters, and frequency changers.
SUBSTANCE: intermediate magnetic circuit of proposed multiphase transformer is laminated structure of different-profile stacks with slots on butt-end, internal, and side surfaces accommodating three-phase and multiphase windings. Two extreme stacks of intermediate laminated magnetic circuit have slots throughout entire height of coil group. Central part of intermediate laminated magnetic circuit has slots at external and internal surfaces of laminated magnetic circuit wherein winding turns are placed. Additional magnetic circuits are twisted slotless structures.
EFFECT: enhanced efficiency, improved electromagnetic compatibility with other pieces of electrical equipment.
1 cl, 4 dwg
![](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="70" height="63"><rect fill-opacity="0"/></svg>)
FIELD: electrical engineering.
SUBSTANCE: proposed converter is designed to supply with power single-phase consumers from three-phase primary supply mains handling balanced load. Conversion process involves two steps: first step includes conversion of three-phase currents and voltages into two-phase modulo equal and quarter-cycle phase-shifted ones; second step includes conversion of two-phase currents and voltages into single-phase receiver ones by means of ballast reactance components inserted in two-phase winding circuit of converter transformer. Winding parameters of converter transformer desired to meet balance conditions as well as correlations between parameters of reactance components are specified. Balanced mode of converter operation is monitored and ballast reactance components are controlled by measuring two-phase currents and phase-shift angle between them as function of magnitude and polarity of ballast-component reactances.
EFFECT: enhanced power capacity of single-phase loads being handled.
1 cl, 2 dwg
FIELD: electrical engineering and transformer building.
SUBSTANCE: proposed power supply designed for three-phase current and voltage conversion has magnetic circuit assembled of three cores A, B, and C of equal cross-sectional area, three-phase primary winding, sectionalizing switch, three-phase network, and secondary winding designed so that each magnetic core mounts two partial windings with unequal turn number; partial windings of each magnetic core bearing same index have equal turn number: Wa1x1 = Wb1y1= Wc1z1 and Wa2x2 = Wb2y2 = Wc2z2; secondary-winding parts are connected in series as follows: Wa1x1 winding is connected to Wc1z1 so that lead a1 is coupled with lead c1. Winding Wa2x2 is connected to Wb1y1, Wb2y2, and Wc2z2. Lead a2 is connected to lead b1, lead y1, to lead b2, and lead y2, to lead x2, split-phase balanced load being connected to leads c2 and z1 with center tap on common lead x1-x2.
EFFECT: simplified design, enhanced performance characteristics.
1 cl, 1 dwg
FIELD: electrical engineering and transformer building.
SUBSTANCE: proposed power supply designed to convert three-phase voltages and currents has magnetic circuit assembled of three cores A, B, and C of equal cross-sectional area, three-phase primary winding, sectionalizing switch, three-phase network, and secondary winding; each magnetic core mounts two partial windings having unequal turn number; winding parts on each magnetic core bearing same index have same turn number: Wa1x1 = Wb1y1 = Wc1z1 and Wa2x2 = Wb2y2 = Wc2x2; secondary winding parts are connected in series as follows: winding Wa1x1 is connected to Wb1y1 and Wc1z1 so that lead x1 is coupled with lead b1 and lead y1, with lead c1; winding Wa2x2 is connected to windings Wb2y2 and Wc2z2, lead a2i being connected to lead b2, lead y2, to lead c2, and lead a1, to leads c1 and z2.
EFFECT: simplified design, enhanced performance characteristics.
3 cl, 1 dwg
![](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="70" height="97"><rect fill-opacity="0"/></svg>)
FIELD: electrical and conversion engineering; reversible conversion of thee-phase supply voltages and currents.
SUBSTANCE: proposed device provides for joint operation of three- and single-phase supply mains and power consumers with balanced three-phase voltages and currents being maintained. Linear characteristics of converter components ensure high quality of electrical energy in supply mains and at power consumers and normally desired electrostatic compatibility between power supplies and power consumers. Single-phase supply voltage and current are first converted into balanced system of modulo equal two-phase voltages and currents shifted in phase by one fourth of cycle. Then transformer converter functions to convert two-phase voltages and currents into balanced set of modulo equal three-phase voltages and currents of receiver shifted in phase by one third of cycle. Two-step inversion occurs in reverse sequence. Converter is checked for balanced operation and ballast reactance components are controlled by measuring phase shift angle between two-phase currents as function of magnitude and polarity whose deviations act upon reactances of ballast components.
EFFECT: ability of feeding single-phase power consumers from three-phase primary mains handling balanced loads and three-phase consumers with balanced power from single-phase mains.
6 cl, 5 dwg
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FIELD: electrical and power engineering systems, plants, and pieces of equipment.
SUBSTANCE: two-phase winding of transformer converter has several series-connected groups whose number equals number of regulation stages; each group, in its turn, has six coils whose turn number is correlated by expression 
where K may vary within Three first and three remaining coils in each group form two half-groups that function as phase members of two-phase winding.
EFFECT: enlarged functional capabilities.
2 cl, 1 dwg
FIELD: electrical engineering.
SUBSTANCE: invention pertains to electrical engineering, to converting technology and is meant for converting electrical energy of three- and single-phase voltage and current. The alternatives of devices for converting electrical energy provide for coupling modes of operation of three-phase networks and single-phase consumers, for which requirements of symmetry of three-phase voltage and current are sufficiently met. Due to the linearity of the characteristics which are part of the converter elements, the proposed schematic circuit diagrams, the set of elements of the device and the ratio of parameters of elements, the quality of electrical energy in the electrical networks and the consumer is increased. This means the standard which is necessary for electromagnetic compatibility of sources and receivers of electrical energy is achieved. The alternatives of devices for reversible conversion of electrical energy of three-phase and single-phase voltage and current consists of a single-phase transformer or autotransformer, three-phase transformer, two units of ballast reactive elements - capacitors and inductors, and a unit for controlling the ballast reactive elements and control of the symmetric mode of operation of the converter. Control of the symmetric mode of operation of the converter and control of the reactive ballast elements is achieved by measuring the amplitude of single-phase currents and voltages and the shift angle between them and depending on the value and sign of deviation of measured values of the effect on parameters of reactive ballast elements.
EFFECT: increased power during operation from three-phase primary networks with symmetric loading of the latter, wider functional capabilities due to more alternatives of designing power supply circuits for single-phase consumers, symmetrical power supply to three-phase consumers from a single-phase primary network.
8 cl, 17 dwg
FIELD: electrical engineering.
SUBSTANCE: invention pertains to electrical engineering and can be used as an input organ for protective and automation devices for power supply systems. The single-phase transformer has four primary coils on a toroidal core, ballast resistors and an inductor, multi-phase secondary coils. The beginning of the first coil is joined to the end of the second coil, forming the first input of the device. The end of the first coil is joined to the end of the third coil, the end of the second coil to the end of the fourth coil. The end of the third coil is joined to the ballast inductor, and the beginning of the fourth coil is joined to the ballast resistor, the other ends of which form the second input of the device when joined. To obtain a rotating magnetic field, the first, second, third and fourth coils are on the toroidal magnetic core with shift of 90 degrees from each other. The number of turns in the first and fourth coils is more than twice the second and third coils.
EFFECT: elimination of phase shifting elements when converting single-phase voltage into multi-phase voltage.
1 dwg
FIELD: electrical engineering; transformer manufacture; multiphase static electrical energy converters.
SUBSTANCE: proposed multiphase transformer has internal spiral toroidal core built of two equal-height rings joined together along butt-end rough surfaces by means of adhesive. Bonded to butt-end ground surfaces of mentioned rings are rectangular-shape laminated teeth. Two lateral spiral toroidal cores ground on one butt-end abut against teeth by their ground ends. Multiphase secondary winding is wound on internal magnetic core and placed in slots between teeth, Three-phase primary winding coils are similar coils whose turns are wound on teeth. Coils are interconnected within each phase in series so that magnetic flux set up due to them within internal magnetic core equals sum of magnetic fluxes set up by them in teeth.
EFFECT: enhanced stability of characteristics, facilitated manufacture at high efficiency.
1 cl, 5 dwg
FIELD: electrical engineering; multiphase semiconductor converters such as inverters, rectifiers, and other semiconductor devices.
SUBSTANCE: proposed multiphase transformer has intermediate laminated core and two lateral spiral cores abutting against butt-ends of intermediate laminated core through nonmagnetic spacers. Intermediate laminated core is made of stacks of two different cold-rolled electric steel sections with slots in butt-end, inner, and side surfaces accommodating three-phase winding enclosing intermediate laminated core yoke. Central part of intermediate laminated core has slots at outer and inner surfaces of laminated core. Lateral spiral cores abutting against intermediate laminated core have slots in side surface abutting against intermediate laminated core accommodating two circular windings with taps, each enclosing respective lateral spiral core.
EFFECT: enhanced electromagnetic compatibility, reduced power loss, enhanced efficiency.
1 cl, 4 dwg
FIELD: electrical engineering; multiphase semiconductor converters such as rectifiers, inverters, and frequency changers.
SUBSTANCE: intermediate magnetic circuit of proposed multiphase transformer is laminated structure of different-profile stacks with slots on butt-end, internal, and side surfaces accommodating three-phase and multiphase windings. Two extreme stacks of intermediate laminated magnetic circuit have slots throughout entire height of coil group. Central part of intermediate laminated magnetic circuit has slots at external and internal surfaces of laminated magnetic circuit wherein winding turns are placed. Additional magnetic circuits are twisted slotless structures.
EFFECT: enhanced efficiency, improved electromagnetic compatibility with other pieces of electrical equipment.
1 cl, 4 dwg
FIELD: electrical engineering.
SUBSTANCE: proposed converter is designed to supply with power single-phase consumers from three-phase primary supply mains handling balanced load. Conversion process involves two steps: first step includes conversion of three-phase currents and voltages into two-phase modulo equal and quarter-cycle phase-shifted ones; second step includes conversion of two-phase currents and voltages into single-phase receiver ones by means of ballast reactance components inserted in two-phase winding circuit of converter transformer. Winding parameters of converter transformer desired to meet balance conditions as well as correlations between parameters of reactance components are specified. Balanced mode of converter operation is monitored and ballast reactance components are controlled by measuring two-phase currents and phase-shift angle between them as function of magnitude and polarity of ballast-component reactances.
EFFECT: enhanced power capacity of single-phase loads being handled.
1 cl, 2 dwg
FIELD: electrical and conversion engineering; reversible conversion of thee-phase supply voltages and currents.
SUBSTANCE: proposed device provides for joint operation of three- and single-phase supply mains and power consumers with balanced three-phase voltages and currents being maintained. Linear characteristics of converter components ensure high quality of electrical energy in supply mains and at power consumers and normally desired electrostatic compatibility between power supplies and power consumers. Single-phase supply voltage and current are first converted into balanced system of modulo equal two-phase voltages and currents shifted in phase by one fourth of cycle. Then transformer converter functions to convert two-phase voltages and currents into balanced set of modulo equal three-phase voltages and currents of receiver shifted in phase by one third of cycle. Two-step inversion occurs in reverse sequence. Converter is checked for balanced operation and ballast reactance components are controlled by measuring phase shift angle between two-phase currents as function of magnitude and polarity whose deviations act upon reactances of ballast components.
EFFECT: ability of feeding single-phase power consumers from three-phase primary mains handling balanced loads and three-phase consumers with balanced power from single-phase mains.
6 cl, 5 dwg
FIELD: electrical and power engineering systems, plants, and pieces of equipment.
SUBSTANCE: two-phase winding of transformer converter has several series-connected groups whose number equals number of regulation stages; each group, in its turn, has six coils whose turn number is correlated by expression where K may vary within Three first and three remaining coils in each group form two half-groups that function as phase members of two-phase winding.
EFFECT: enlarged functional capabilities.
2 cl, 1 dwg
FIELD: manufacture of transformers, possibly used in semiconductor conversion devices.
SUBSTANCE: inner axial magnetic circuits in grooves of which secondary multi-phase or three-phase windings are placed have two active end surfaces and they are shifted relative to magnetic circuits in grooves of which primary three-phase windings are placed around their common symmetry axis each by its own angle αi =(2 x i-1)π/m2 (k2B + 1) where i - order number of inner magnetic circuit with secondary winding, m2 - quantity of phase of secondary windings, k2B -quantity of inner magnetic circuits with secondary windings. Lateral axial magnetic circuit adjoined to inner axial magnetic circuit with primary windings adjoined to k2B inner axial magnetic circuit with secondary windings is turned relative to magnetic circuits with primary three-phase windings around their common symmetry axis by angle αl = (2 K2B + 1) π/m2 (k2B +1). Secondary multi-phase windings are placed in grooves of inner axial magnetic circuits and they are shifted one relative to other by angle α sh = π /m2 (k2B +1). Quantity of inner magnetic circuits with secondary windings is determined by relation k2B = (mT / 2 m2 ) - 1, where mT - quantity of phases of outlet voltage.
EFFECT: lowered cost, enhanced mass and size factors, reduced consumption of power and electrical-engineering materials, improved efficiency of transformer.
2 dwg
![](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="70" height="43"><rect fill-opacity="0"/></svg>)
FIELD: transformer manufacture; multiphase semiconductor power converters.
SUBSTANCE: intermediate spiral core of transformer is built of two equal-height rings stuck together at butt-end rough surfaces, ring height being equal to height of rings of side cores. Three-phase primary winding and multiphase secondary winding are placed in slots formed by rectangular teeth stuck to outer butt-end ground surfaces of intermediate-core rings and welded to them over external and internal generating lines. Teeth are laminated structures made of cold-rolled electric steel, their rolling orientation being unidirectional with magnetic flux.
EFFECT: enhanced efficiency, reduced mass, facilitated manufacture.
1 cl, 2 dwg
FIELD: transformer manufacture; multiphase semiconductor power converters.
SUBSTANCE: intermediate spiral core of transformer is built of two equal-height rings stuck together at butt-end rough surfaces, ring height being equal to height of rings of side cores. Three-phase primary winding and multiphase secondary winding are placed in slots formed by rectangular teeth stuck to outer butt-end ground surfaces of intermediate-core rings and welded to them over external and internal generating lines. Teeth are laminated structures made of cold-rolled electric steel, their rolling orientation being unidirectional with magnetic flux.
EFFECT: enhanced efficiency, reduced mass, facilitated manufacture.
1 cl, 2 dwg