CN219716634U - Separately excited and self-excited magnetically controlled reactor - Google Patents
Separately excited and self-excited magnetically controlled reactor Download PDFInfo
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Abstract
The utility model discloses a separately excited and self-excited magnetically controlled reactor, which belongs to the technical field of electric control. In order to improve the performance and reduce the cost, an annular three-phase three-column symmetrical iron core is adopted, an alternating current working winding is wound on three iron core columns, and a direct current control winding is respectively wound on an upper yoke and a lower yoke which are formed by annular winding iron cores. The direct current control windings are connected in parallel after being connected in series, and the two ends of the direct current control windings are connected with the direct current output end of the direct current control power supply. The magnetic permeability of the upper yoke iron core and the lower yoke iron core is changed through the regulation and control of a direct current control power supply, so that the stepless regulation and control of output current is realized. The method has the characteristics of short reaction time, high adjustment speed, small volume, light weight, low cost, less loss and no harmonic wave. The voltage and the current can be regulated and controlled, and reactive compensation can be performed.
Description
Technical Field
The design relates to a separately excited and self-excited magnetically controlled reactor, which belongs to the technical field of electric control.
Technical Field
The existing magnetic control reactors for adjusting the reactance value by adjusting the saturation of the iron core through direct current can be divided into two types, namely a magnetic control reactor CSR and a magnetic valve reactor MCR. An alternating current working winding and a direct current control winding are respectively arranged on a CSR iron core of the magnetic control reactor, and the direct current winding current is controlled by an external direct current power supply to change the magnetic permeability of the iron core so as to regulate and control the reactance value of the alternating current working winding. There are such disadvantages: due to the ampere-turns (IKNK) of the DC control winding and the ampere-turns (I) of the AC working winding SC N G ) Equal, the DC control winding requires a certain additional consumption of electric energyAnd waste is caused. The reaction time is long, the alternating current winding series connection method is 1/10 second, and the connection rule is longer. The third harmonic wave in the output waveform is obviously increased, the method is not suitable for places or load demands with requirements on the waveform, and electromagnetic pollution and interference are formed on a power grid, surrounding environments and equipment. Six iron core columns are needed for three phases, so that the consumption of iron cores is large, the cost is high, and the iron loss is necessarily large. The magnetic valve reactor MCR has not only the third harmonic but also electromagnetic noise and core heating, and the like, which are more than the former, and the three phases are six core columns as well.
An announcement number is: 215731244U and application number: the technical proposal of 202110304746.1 adopts hexagonal winding iron cores for the upper yoke and the lower yoke, has the defects of relatively long magnetic circuit, difficult processing and forming, complex process, reduced yield and increased cost.
Based on the above, the design is intended to provide a separately excited type and self-excited type three-phase three-column type magnetic control reactor which has mature processing and manufacturing processes, thus improving the yield and further reducing the cost.
In order to achieve the object, the following technical scheme is adopted:
summary of the utility model
A separately excited magnetically controlled reactor comprising: three post iron cores of three-phase, alternating current work winding and direct current control winding, characterized by: the separately excited magnetically controlled reactor consists of AC work winding and DC control winding wound around three-phase three-column symmetric iron core.
The upper yoke and the lower yoke of the three-phase three-column symmetrical iron core are respectively composed of annular winding iron cores, and three iron core columns formed by overlapping arc-shaped silicon steel sheets are fixed between the upper yoke and the lower yoke. The alternating current working winding is composed of windings which are respectively wound on three iron core columns. The direct current control winding is composed of windings respectively wound on an upper yoke and a lower yoke between iron core columns. The direct current control windings are connected in series and then in parallel in a mode of being connected with each other at the head and the tail, and two ends of the direct current control windings are connected with an external direct current control power supply. The alternating current working current is subjected to stepless change by regulating and controlling an external direct current control power supply.
In yet another version of the utility model, the separately excited magnetically controlled reactor is comprised of an ac working winding and a dc control winding wound on a solid triangular core. The upper yoke and the lower yoke of the three-dimensional triangle iron core are respectively composed of triangle winding iron cores, and three iron core columns formed by overlapping arc-shaped silicon steel sheets are respectively fixed between three corners of the upper yoke and three corners of the lower yoke. The alternating current working winding is composed of windings which are respectively wound on three iron core columns. The direct current control winding is composed of windings respectively wound on three sides of the upper yoke and three sides of the lower yoke.
In yet another version of the utility model, the three core limbs are laminated from non-arcuate, straight sheets of silicon steel and are respectively secured between the three sides of the upper yoke and the three sides of the lower yoke. The alternating current working winding is composed of windings which are respectively wound on three iron core columns. The direct current control winding is composed of windings respectively wound on three corners of the upper yoke and three corners of the lower yoke.
Summary of the utility model
A self-exciting electrically-modulated magnetically controlled reactor comprising: three post iron cores of three-phase, alternating current working winding, direct current control winding and three-phase direct current control power, characterized by: the self-excitation type three-phase three-column type electric-regulation magnetic-control reactor consists of an alternating current working winding and a direct current control winding which are wound on a three-phase three-column symmetrical iron core and are mutually connected through a three-phase direct current control power supply.
The upper yoke and the lower yoke of the three-phase three-column symmetrical iron core are respectively composed of annular winding iron cores, and three iron core columns formed by overlapping arc-shaped silicon steel sheets are fixed between the upper yoke and the lower yoke. The alternating current working winding consists of a main winding and an isolation winding which are respectively wound on three iron core columns. The direct current control winding is composed of windings respectively wound on an upper yoke and a lower yoke between iron core columns. The three-phase direct current control power supply is formed by connecting a thyristor and a three-phase linear reactor string with a middle tap with an alternating current input end of a three-phase rectifier bridge after being pressed into TCR. One end of the isolation winding is connected with each other, and the other end of the isolation winding is connected with an alternating current input end of the three-phase direct current control power supply. The direct current control windings are connected in series and then in parallel in a mode of being connected with each other at the head and the tail, and the two ends of the direct current control windings are connected with the positive terminal and the negative terminal of the three-phase direct current control power supply. The alternating current working current generated by the electric and magnetic mixed regulation and control is subjected to stepless change through the regulation and control of the three-phase direct current control power supply.
In yet another version of the utility model, the self-exciting magnetically controlled reactor is comprised of an ac working winding and a dc control winding wound on a solid triangular iron core. The upper yoke and the lower yoke of the three-dimensional triangle iron core are respectively composed of triangle winding iron cores, and three iron core columns formed by overlapping arc-shaped silicon steel sheets are respectively fixed between three corners of the upper yoke and three corners of the lower yoke. The alternating current working winding consists of a main winding and an isolation winding which are respectively wound on three iron core columns. The direct current control winding is composed of windings respectively wound on three sides of the upper yoke and three sides of the lower yoke.
In yet another version of the utility model, the three core limbs are laminated from non-arcuate, straight sheets of silicon steel and are respectively secured between the three sides of the upper yoke and the three sides of the lower yoke. The alternating current working winding consists of a main winding and an isolation winding which are respectively wound on three iron core columns. The direct current control winding is composed of windings respectively wound on three corners of the upper yoke and three corners of the lower yoke.
The utility model is characterized in that: the upper yoke and the lower yoke adopt annular winding iron cores, so that the processing and manufacturing processes are mature and simple, the yield is ensured, and the magnetic circuit is shortened, thereby reducing the volume and the weight, and further reducing the material and processing cost.
Drawings
Fig. 1 is a diagram of the shape, structure and winding arrangement of the core of a separately excited magnetically controlled reactor.
Fig. 2 is a star wiring diagram of the separately excited magnetically controlled reactor.
Fig. 3 is a diagram of the shape, structure and winding arrangement of the core of the self-exciting electrically-controlled magnetically-controlled reactor.
Fig. 4 is a star wiring diagram of the self-excited magnetically controlled reactor.
Fig. 5 is another shape, structure and winding arrangement of a separately excited, self-exciting magnetically controlled reactor core.
Detailed description of the preferred embodiments
The utility model one will be further described with reference to the accompanying drawings.
The separately excited magnetically controlled reactor shown in fig. 1 and 2 is made of windings wound on a three-phase three-pole symmetric core, and includes: upper and lower yoke cores 1, core limbs 2, an ac working winding 3 and a dc control winding 4. The upper and lower yokes 1 of the core are composed of annular wound cores, and three core limbs 2 are laminated of arc-shaped silicon steel sheets and fixed between the upper and lower yokes in a three-dimensional triangle manner. The ac working windings 3 are wound on the three core limbs 2 respectively, and the dc control windings 4 are wound on the upper and lower yokes between the core limbs 2 respectively. The direct current control windings of the upper yoke and the direct current control windings of the lower yoke are respectively connected in series and then in parallel in a mode of connecting the head and the tail of the direct current control windings, and the two ends of the direct current control windings are connected with the positive and the negative of an external direct current control power supply.
The separate excitation type magnetically controlled reactor works as follows:
when the regulating current of the external direct current control power supply is increased, the current of the direct current control winding 4 is increased immediately, the magnetic permeability of the upper yoke iron core 1 and the lower yoke iron core 1 is reduced, the reactance value of the alternating current working winding 3 is reduced, and the working current is increased. When the regulating current of the external direct current control power supply is reduced, the magnetic permeability of the iron core 1 starts to rise along with the small regulating current of the direct current control winding, and the current of the alternating current working winding 3 is reduced. The upper and lower yokes formed by the toroidal wound cores form a closed common magnetic circuit and the magnetic circuits on both sides of each core limb are symmetrical. The DC control windings which are wound around the common magnetic circuit and connected in series form the common circuit, so that the third harmonic current of the three-phase AC working winding is equal in magnitude but opposite in phase and counteracts zero at any moment of the instantaneous value of the mutual inductance voltage generated by the common circuit. Since the third harmonic is formed by overlapping other odd (5, 7, …) harmonics, each other odd harmonic is also zero. Therefore, not only saving iron core material, but also forming an inexpensive AC resonance elimination circuit.
The regulating current of the external DC control power supply is increased and reduced in this way, and the working current of the AC working winding 3 is increased and reduced.
Detailed description of the preferred embodiments
The second utility model will be further described with reference to the accompanying drawings.
The self-excited electrically-controlled magnetically controlled reactor shown in fig. 3 and 4 is made of windings wound on a three-phase three-pole symmetrical iron core, and comprises: the upper yoke iron core 1, the lower yoke iron core 2, an alternating current working main winding 3, an isolation winding 4, a direct current control winding 5 and a three-phase direct current control power supply 6. The upper and lower yokes 1 of the core are composed of annular wound cores, and three core limbs 2 are laminated by arc-shaped silicon steel sheets and fixed between the upper and lower yokes in a three-dimensional triangle manner. An ac main winding 3 and an isolation winding 4 are wound on the three core limbs 2, and a dc control winding 5 is wound on the upper and lower yokes between the core limbs 2. The three-phase DC control power supply 6 is formed by connecting a bidirectional thyristor G and a three-phase linear reactor L with a middle tap in series to form a TCR and then connecting the TCR with a diode D 1 ～D 6 The three-phase rectifier bridge is connected. One end of the thyristor G is an alternating current input end of a three-phase direct current control power supply 6, the other end of the thyristor G is connected with one end of each phase winding of the three-phase linear reactor, the middle taps of each phase winding are connected in a star shape or a triangle shape to form an alternating current loop, the other end of the winding is connected with an alternating current arm of a three-phase rectifier bridge to form a direct current loop, and the direct current arms of the three-phase rectifier bridge are positive and negative output ends. One ends of the three isolation windings 4 are connected with each other, and the other ends are connected with an alternating current input end of the three-phase direct current control power supply 6. The direct current control windings of the upper yoke and the direct current control windings of the lower yoke are respectively connected in series and then in parallel in a mode of connecting the head and the tail, and the two ends of the direct current control windings are connected with the positive end and the negative end of the three-phase direct current control power supply 6.
The self-excitation type electrically-controlled magnetically controlled reactor works as follows:
the working process and state of circuit regulation.
When the conduction angle of the thyristor G in the three-phase dc control power supply 6 increases from zero, the dc circuit and the ac circuit immediately generate currents, respectively. The direct current is injected into the direct current control winding 5 to become direct current regulation and control current, and the alternating current works as the main winding 3 to generate certain working current. The ac circuit generates a larger current due to the smaller value of the tap winding L, and the ac operation main winding 3 then generates a larger operating current. The state of the magnetic control reactor is essentially a transformer, the isolation winding 4 becomes an alternating current power supply of the three-phase direct current control power supply 6, the alternating current and direct current loop currents become load currents, and the current of the alternating current working main winding 3 is increased immediately along with the increase of the conduction angle of the thyristor G. As the conduction angle of the thyristor G increases, the currents of the ac operation main winding 3 and the isolation winding 4 increase at the same time. Because the thyristor G is directly regulated and controlled by a circuit, the starting time of the current generated by the AC working main winding 3 is almost synchronous with the opening time of the thyristor G, so that the time of the AC working main winding 3 for generating the AC current, namely the reaction time of the magnetically controlled reactor, is advanced by nearly 1/10 second. When the conduction angle of the thyristor G is reduced, the current of the alternating current working main winding 3 and the current of the isolation winding 4 are reduced simultaneously, and the reaction time of the reduction of the current of the magnetic control reactor is also advanced by nearly 1/10 second. Obviously, the isolated winding 4 is adopted as an alternating current power supply of the three-phase direct current control power supply 6, and an alternating current loop and a direct current loop are adopted as a scheme of load electricity, so that on one hand, the reaction time of the magnetic control reactor for generating working current is shortened. On the other hand, the self-excitation, namely, the partial current of the AC working main winding 3 becomes exciting current of the DC control winding 5 after the voltage regulation and rectification by the three-phase DC control power supply 6. Therefore, direct current regulation and control power is not consumed additionally, and electricity saving is achieved.
The working process and state of the magnetic circuit are regulated.
When the conduction angle of the thyristor G increases, the current of the AC working main winding 3 increases and the regulating current of the DC control winding 5 synchronously increases, the magnetic permeability of the upper and lower yokes of the iron core starts to decrease, and the reactance value of the AC working main winding 3 starts to decrease. On the basis of the current generated by direct regulation of the circuit, the magnetic control current generated by the reduction of the magnetic permeability and the reduction of the reactance value of the iron core in the alternating current working main winding 3 begins to increase, and is overlapped with the current formed by direct regulation of the circuit to generate continuously increased working current. When the conduction angle of the thyristor G is linearly reduced, the regulating current of the direct-current control winding 5 is synchronously reduced, the magnetic permeability of the upper yoke and the lower yoke of the iron core is increased, the magnetic control current of the alternating-current working main winding 3 is reduced along with the rising of the magnetic permeability of the iron core, and the working current generated by the joint regulation of electric regulation and magnetic control is reduced.
The upper and lower yokes formed by the annular wound cores not only form a common magnetic circuit, but also have symmetrical magnetic circuits on both sides of the three core limbs. The direct current control windings 5 which are wound on the common magnetic circuit and are connected in series form a symmetrical common circuit, so that the vector combination of the mutual inductance voltages generated by the common circuit of the third harmonic generated by magnetic control and direct electric modulation of the thyristor G is zero, and the mutual inductance voltages generated by the common circuit of the three-phase alternating current working main winding 3 at any moment are equal in magnitude but opposite in phase and offset. Therefore, not only saving iron core material, but also forming an inexpensive AC resonance elimination circuit.
After a TCR formed by connecting a tapped linear reactor and a thyristor in series is in a mixed regulation mode of direct circuit regulation and magnetic circuit regulation, the current of the AC working main winding 3 is composed of an electric regulation current formed by direct regulation of a thyristor G circuit and a magnetic control current generated by the magnetic permeability change of an iron core, and the duty ratio of the electric regulation current in the AC working current is increased. Meanwhile, no matter the current is increased or reduced, each time the current is changed, the current variable of the electric regulation is in front, and the current variable of the magnetic control is behind, so that the time node of the thyristor G circuit for directly regulating and controlling the current variable is always in the reactor reflection time before the magnetic control current does not generate the variable. Therefore, the time constant is reduced, the direct current excitation power is saved, and the method has the common advantages of short reaction time of TCR, high adjustment speed, no extra consumption of excitation power, large capacity of CSR and MCR and high working voltage.
The conduction angle of the thyristor G is increased and reduced in this way, so that the alternating current working current generated by the electric and magnetic mixed regulation and control is changed steplessly.
Claims (6)
1. A separately excited magnetically controlled reactor comprising: three post iron cores of three-phase, alternating current work winding and direct current control winding, characterized by: the separately excited magnetically controlled reactor consists of an alternating current working winding and a direct current control winding which are wound on a three-phase three-column symmetrical iron core; the upper yoke and the lower yoke of the three-phase three-column symmetrical iron core are respectively composed of annular winding iron cores, and three iron core columns formed by overlapping arc-shaped or non-arc-shaped straight silicon steel sheets are fixed between the upper yoke and the lower yoke; the alternating current working winding consists of windings which are respectively wound on three iron core columns; the direct current control winding consists of windings respectively wound on an upper yoke and a lower yoke between iron core columns; the direct current control windings are respectively connected in series and then in parallel in a mode of being connected with each other at the head and the tail, and the two ends of the direct current control windings are connected with an external direct current control power supply; the alternating current working current is subjected to stepless change by regulating and controlling an external direct current control power supply.
2. A separately excited magnetically controlled reactor comprising: three post iron cores of three-phase, alternating current work winding and direct current control winding, characterized by: the separately excited magnetic control reactor consists of an alternating current working winding and a direct current control winding which are wound on a three-dimensional triangle three-phase symmetrical iron core; the upper yoke and the lower yoke of the three-dimensional triangular three-phase symmetrical iron core are respectively composed of triangular winding iron cores, and three iron core columns formed by overlapping arc-shaped or non-arc-shaped linear silicon steel sheets are respectively fixed between three corners of the upper yoke and three corners of the lower yoke; the alternating current working winding consists of windings which are respectively wound on three iron core columns; the direct current control winding is composed of windings respectively wound on three sides of the upper yoke and three sides of the lower yoke; the direct current control windings are respectively connected in series and then in parallel in a mode of being connected with each other at the head and the tail, and the two ends of the direct current control windings are connected with an external direct current control power supply; the alternating current working current is subjected to stepless change by regulating and controlling an external direct current control power supply.
3. A separately excited magnetically controlled reactor comprising: three post iron cores of three-phase, alternating current work winding and direct current control winding, characterized by: the separately excited magnetic control reactor consists of an alternating current working winding and a direct current control winding which are wound on a three-dimensional triangle three-phase symmetrical iron core; the upper yoke and the lower yoke of the three-dimensional triangular three-phase symmetrical iron core are respectively composed of triangular winding iron cores, and three iron core columns formed by overlapping non-arc linear silicon steel sheets are respectively fixed between three sides of the upper yoke and three sides of the lower yoke; the alternating current working winding consists of windings which are respectively wound on three iron core columns; the direct current control winding is composed of windings respectively wound on three corners of the upper yoke and three corners of the lower yoke; the direct current control windings are respectively connected in series and then in parallel in a mode of being connected with each other at the head and the tail, and the two ends of the direct current control windings are connected with an external direct current control power supply; the alternating current working current is subjected to stepless change by regulating and controlling an external direct current control power supply.
4. A self-exciting magnetically controlled reactor comprising: three post iron cores of three-phase, alternating current working winding, direct current control winding and three-phase direct current control power, characterized by: the self-excitation type magnetic control reactor consists of an alternating current working winding and a direct current control winding which are wound on a three-phase three-column symmetrical iron core; the upper yoke and the lower yoke of the three-phase three-column symmetrical iron core are respectively composed of annular winding iron cores, and three iron core columns formed by overlapping arc-shaped or non-arc-shaped straight silicon steel sheets are fixed between the upper yoke and the lower yoke; the alternating current working winding consists of a main winding and an isolation winding which are respectively wound on three iron core columns; the direct current control winding consists of windings respectively wound on an upper yoke and a lower yoke between iron core columns; the three-phase direct current control power supply is formed by connecting a thyristor and a three-phase linear reactor with a middle tap in series to form a TCR and then connecting the TCR with an alternating current input end of a three-phase rectifier bridge; one end of the isolation winding is connected with each other, and the other end of the isolation winding is connected with an alternating current input end of the three-phase direct current control power supply; the direct current control windings are connected in series and then in parallel in a mode of being connected with each other at the head and the tail, and the two ends of the direct current control windings are connected with the positive terminal and the negative terminal of the three-phase direct current control power supply; the alternating current working current generated by the electric and magnetic mixed regulation and control is subjected to stepless change through the regulation and control of the three-phase direct current control power supply.
5. A self-exciting magnetically controlled reactor comprising: three post iron cores of three-phase, alternating current working winding, direct current control winding and three-phase direct current control power, characterized by: the self-excitation type magnetic control reactor consists of an alternating current working winding and a direct current control winding which are wound on a three-dimensional triangle three-phase symmetrical iron core; the upper yoke and the lower yoke of the three-dimensional triangular three-phase symmetrical iron core are respectively composed of triangular winding iron cores, and three iron core columns formed by overlapping arc-shaped or non-arc-shaped linear silicon steel sheets are respectively fixed between three corners of the upper yoke and three corners of the lower yoke; the alternating current working winding consists of a main winding and an isolation winding which are respectively wound on three iron core columns; the direct current control winding is composed of windings respectively wound on three sides of the upper yoke and three sides of the lower yoke; the three-phase direct current control power supply is formed by connecting a thyristor and a three-phase linear reactor with a middle tap in series to form a TCR and then connecting the TCR with an alternating current input end of a three-phase rectifier bridge; one end of the isolation winding is connected with each other, and the other end of the isolation winding is connected with an alternating current input end of the three-phase direct current control power supply; the direct current control windings are connected in series and then in parallel in a mode of being connected with each other at the head and the tail, and the two ends of the direct current control windings are connected with the positive terminal and the negative terminal of the three-phase direct current control power supply; the alternating current working current generated by the electric and magnetic mixed regulation and control is subjected to stepless change through the regulation and control of the three-phase direct current control power supply.
6. A self-exciting magnetically controlled reactor comprising: three post iron cores of three-phase, alternating current working winding, direct current control winding and three-phase direct current control power, characterized by: the self-excitation type magnetic control reactor consists of an alternating current working winding and a direct current control winding which are wound on a three-dimensional triangle three-phase symmetrical iron core; the upper yoke and the lower yoke of the three-dimensional triangular three-phase symmetrical iron core are respectively composed of triangular winding iron cores, and three iron core columns formed by overlapping non-arc linear silicon steel sheets are respectively fixed between three sides of the upper yoke and three sides of the lower yoke; the alternating current working winding consists of a main winding and an isolation winding which are respectively wound on three iron core columns; the direct current control winding is composed of windings respectively wound on three corners of the upper yoke and three corners of the lower yoke; the three-phase direct current control power supply is formed by connecting a thyristor and a three-phase linear reactor with a middle tap in series to form a TCR and then connecting the TCR with an alternating current input end of a three-phase rectifier bridge; one end of the isolation winding is connected with each other, and the other end of the isolation winding is connected with an alternating current input end of the three-phase direct current control power supply; the direct current control windings are connected in series and then in parallel in a mode of being connected with each other at the head and the tail, and the two ends of the direct current control windings are connected with the positive terminal and the negative terminal of the three-phase direct current control power supply; the alternating current working current generated by the electric and magnetic mixed regulation and control is subjected to stepless change through the regulation and control of the three-phase direct current control power supply.
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