Five-column type phase-shifting reactor

Abstract

The utility model relates to a five-column type phase-shifting reactor. Comprising iron cores and iron yokes, the iron cores and the iron yokes comprise an upper iron yoke and a lower iron yoke, main iron cores are installed between the left ends, the middle portions and the right ends of the upper iron yoke and the lower iron yoke, auxiliary iron cores are arranged between the adjacent main iron cores, and a five-column structure is formed; a first coil winding with a first coil wiring terminal, a second coil winding with a second coil wiring terminal and a third coil winding with a third coil wiring terminal are respectively arranged on each main iron core; the device further comprises a first power supply wiring terminal, a first neutral wiring terminal, a second power supply wiring terminal, a second neutral wiring terminal, a third power supply wiring terminal and a third neutral wiring terminal. Ventilation heat dissipation grooves are formed between the coil windings and the main iron cores in the coil windings, and aluminum heat dissipation fins are installed on the inner sides of the coil windings. The utility model provides the five-column type phase-shifting reactor which is strong in heat dissipation capability, reduces the heat impact effect received by the coil, and avoids the problem of overheating during operation.

Description

Technical Field

[0001] This utility model belongs to the field of reactor technology, and in particular relates to a five-column phase-shifting reactor. Background Technology

[0002] Phase-shifting reactors are facilities used for harmonic suppression in converter power supply systems. In recent years, with the rapid development of power electronics and AC speed control technology, the number of semiconductor converters put into power supply systems has been increasing. The voltage and current generated by converters are mostly non-sinusoidal waveforms, containing a large number of harmonics, which cause serious pollution to the power grid. How to suppress or eliminate these harmonics has been a problem that has been solved for generations. As a harmonic suppression facility, the three-phase five-limb phase-shifting reactor, as an important structural form of phase-shifting reactor, has been increasingly widely used in current power systems due to its characteristics such as providing a closed loop for the three-phase zero-sequence magnetic flux component, reducing the impact of harmonic leakage magnetic field on the external environment, and improving electromagnetic compatibility.

[0003] Existing three-phase five-limb phase-shifting reactors suffer from poor heat dissipation due to structural design limitations, leading to overheating issues when operating at high frequencies. Therefore, it is necessary to optimize the structure of the three-phase five-limb phase-shifting reactor to address these problems. Utility Model Content

[0004] The purpose of this invention is to provide a five-column phase-shifting reactor with strong heat dissipation capacity, reducing the heat impact on the coil and avoiding overheating problems during operation.

[0005] The technical solution adopted by this utility model is as follows: a five-column phase-shifting reactor, including an iron core and an iron yoke, the iron core and iron yoke including an upper iron yoke and a lower iron yoke, a main iron core is installed between the left end, the middle part and the right end of the upper iron yoke and the lower iron yoke, and an auxiliary iron core is provided between adjacent main iron cores to form a five-column structure; each main iron core is provided with a first coil winding with a first coil terminal, a second coil winding with a second coil terminal and a third coil winding with a third coil terminal, and also includes a first power terminal and a first neutral terminal, a second power terminal and a second neutral terminal, and a third power terminal and a third neutral terminal; ventilation and heat dissipation grooves are installed between each coil winding and the main iron core inside, and aluminum heat sinks are installed on the inner side of each coil winding.

[0006] Preferably, the first power supply terminal and the first neutral terminal are installed above the first coil winding and an insulating pad is provided between them; the second power supply terminal and the second neutral terminal are installed above the second coil winding and an insulating pad is provided between them; the third power supply terminal and the third neutral terminal are installed above the third coil winding and an insulating pad is provided between them.

[0007] Preferably, it also includes a power connection plate, and the first neutral terminal, the second neutral terminal and the third neutral terminal are simultaneously connected to the power connection plate.

[0008] Preferably, each main iron core adopts a segmented air gap structure, which is composed of multiple iron core columns and shock-absorbing air gap plates stacked together, with the shock-absorbing air gap plates located between adjacent iron core columns; the main iron core is impregnated with paint and dried to become a whole, and glass fiber cloth tape is wrapped around the outside of the main iron core and bonded and fixed with epoxy resin paint.

[0009] Preferably, an upper base is installed on the upper yoke of the iron core and yoke, and a lower base is installed on the lower yoke of the iron core and yoke.

[0010] Preferably, the upper base includes two angle steel upper crossbeams, which are located at the front and rear of the upper yoke and are fixed together by assembly bolts; the lower base includes two angle steel lower crossbeams, which are located at the front and rear of the lower yoke and are fixed together by assembly bolts.

[0011] The advantages and positive effects of this utility model are:

[0012] This invention provides a five-column phase-shifting reactor. Compared with the existing three-phase five-column phase-shifting reactor, this phase-shifting reactor has ventilation and heat dissipation slots installed between each coil winding and its internal main iron core. Aluminum heat sinks are installed on the inner side of each coil winding. The ventilation and heat dissipation slots construct a longitudinally continuous heat dissipation airflow channel, and the aluminum heat sinks transfer the heat generated in the coil winding to the heat dissipation airflow channel. In this way, the phase-shifting reactor can dissipate the heat generated by the coil winding in a timely manner during operation, has a stronger heat dissipation capacity, reduces the heat impact on the coil, and avoids overheating problems during operation. Attached Figure Description

[0013] Figure 1 This is a top view of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 3 This is a side view structural diagram of the present invention;

[0016] Figure 4 yes Figure 1 A schematic diagram of the main structure of the iron core and yoke;

[0017] Figure 5 This is the wiring diagram of this utility model.

[0018] In the picture:

[0019] 1. Iron core and yoke; 1-1. Upper yoke; 1-2. Lower yoke; 1-3. Main iron core; 1-4. Secondary iron core; 2. Upper base; 3. First coil winding; 4. Second coil winding; 5. Third coil winding; 6. First coil terminal; 7. Second coil terminal; 8. Third coil terminal; 9. Electrical connection plate; 10. Lower base; 11. First power supply terminal; 12. Second power supply terminal; 13. Third power supply terminal; 14. First neutral terminal; 15. Second neutral terminal; 16. Third neutral terminal; 17. Insulating pad. Detailed Implementation

[0020] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0021] Please see Figure 1 , Figure 2 and Figure 3 The five-column phase-shifting reactor of this utility model includes an iron core and an iron yoke 1. For example... Figure 4 As shown, the iron core and yoke 1 include an upper yoke 1-1 and a lower yoke 1-2. A main iron core 1-3 is installed between the left end, the middle part and the right end of the upper yoke 1-1 and the lower yoke 1-2. A secondary iron core 1-4 is provided between adjacent main iron cores 1-3, forming a five-column structure.

[0022] In this embodiment, each main iron core 1-3 adopts a segmented air gap structure, consisting of multiple iron core columns and shock-absorbing air gap plates stacked together, with the shock-absorbing air gap plates located between adjacent iron core columns. The main iron core 1-3 is impregnated with paint and dried to form a whole. Fiberglass cloth tape is wrapped around the outside of the main iron core 1-3 and bonded and fixed with epoxy resin paint. Air gap adhesive is provided between the end face of the iron core column and the shock-absorbing air gap plate. The air gap adhesive is used to bond and fix the end face of the iron core column to the shock-absorbing air gap plate and fill the gap.

[0023] Each main iron core 1-3 is provided with a first coil winding 3 with a first coil terminal 6, a second coil winding 4 with a second coil terminal 7, and a third coil winding 5 with a third coil terminal 8. The first coil terminal 6 is located at the bottom front of the first coil winding 3, the second coil terminal 7 is located at the bottom front of the second coil winding 4, and the third coil terminal 8 is located at the bottom front of the third coil winding 5, which facilitates wiring.

[0024] It also includes a first power terminal 11 and a first neutral terminal 14, a second power terminal 12 and a second neutral terminal 15, and a third power terminal 13 and a third neutral terminal 16. Further, the first power terminal 11 and the first neutral terminal 14 are mounted above the first coil winding 3 with an insulating pad 17 between them; the second power terminal 12 and the second neutral terminal 15 are mounted above the second coil winding 4 with an insulating pad 17 between them; the third power terminal 13 and the third neutral terminal 16 are mounted above the third coil winding 5 with an insulating pad 17 between them. The purpose of providing the insulating pad 17 is to prevent the power terminals from contacting the neutral terminal, thereby improving insulation safety.

[0025] It also includes a power connection plate 9, with the first neutral terminal 14, the second neutral terminal 15 and the third neutral terminal 16 simultaneously connected to the power connection plate 9.

[0026] Figure 5 The wiring diagram is provided below, and the explanation is as follows:

[0027] V, W, and U are the terminals for the three-phase power supply, namely, the first power supply terminal 11, the second power supply terminal 12, and the third power supply terminal 13, respectively. V1 and V2 are the first coil terminals 6, W1 and W2 are the second coil terminals 7, and U1 and U2 are the third coil terminals 8. The first coil winding 3, containing V, V1, and V2, is located on the leftmost main iron core 1-3. The second coil winding 4, containing W, W1, and W2, is located on the middle main iron core 1-3. The third coil winding 5, containing U, U1, and U2, is located on the rightmost main iron core 1-3.

[0028] Ventilation and heat dissipation slots are installed between each coil winding and its internal main iron core 1-3, and aluminum heat sinks are installed on the inner side of each coil winding. The ventilation and heat dissipation slots are integrally injection molded and have longitudinally continuous grooves, creating a longitudinally continuous heat dissipation airflow channel between the main iron core 1-3 and the coil windings. The airflow flowing in this channel carries away the heat generated by the reactor during operation. The aluminum heat sinks are integrated with the coil windings during the winding process, that is, the outer end of the aluminum heat sink is integrated into the inside of the coil windings, and the outer end of the aluminum heat sink is located in the aforementioned heat dissipation airflow channel. In this way, during the operation of this phase-shifting reactor, the heat generated by the coil windings is conducted by the aluminum heat sinks into the heat dissipation airflow channel, further enhancing the heat dissipation capacity of this phase-shifting reactor, reducing the heat impact on the coils, and avoiding overheating problems during operation.

[0029] An upper base is installed on the upper yoke 1-1 of the core and yoke 1, and a lower base is installed on the lower yoke 1-3 of the core and yoke 1. The upper and lower bases are used to enhance the overall structural strength of this phase-shifting reactor and to fix the phase-shifting reactor during application.

[0030] In this embodiment, the upper base includes two angle steel upper crossbeams 2, which are located at the front and rear of the upper yoke 1-1 and are fixed together by assembly bolts; the lower base includes two angle steel lower crossbeams 10, which are located at the front and rear of the lower yoke 1-3 and are fixed together by assembly bolts.

Claims

1. A five-limb phase-shifting reactor, characterized in that: The structure includes an iron core and a yoke (1). The iron core and yoke (1) include an upper yoke (1-1) and a lower yoke (1-2). A main iron core (1-3) is installed between the left end, the middle part, and the right end of the upper yoke (1-1) and the lower yoke (1-2). A secondary iron core (1-4) is provided between adjacent main iron cores (1-3), forming a five-column structure. Each main iron core (1-3) is provided with a first coil winding (3) with a first coil terminal (6) and a second coil terminal (6). The second coil winding (4) and the third coil winding (5) with the third coil terminal (8) also include a first power terminal (11) and a first neutral terminal (14), a second power terminal (12) and a second neutral terminal (15), a third power terminal (13) and a third neutral terminal (16); ventilation and heat dissipation grooves are installed between each coil winding and its internal main iron core (1-3), and aluminum heat sinks are installed on the inner side of each coil winding.

2. The five-column phase-shifting reactor as described in claim 1, characterized in that: The first power terminal (11) and the first neutral terminal (14) are mounted above the first coil winding (3) and an insulating pad (17) is provided between them; the second power terminal (12) and the second neutral terminal (15) are mounted above the second coil winding (4) and an insulating pad (17) is provided between them; the third power terminal (13) and the third neutral terminal (16) are mounted above the third coil winding (5) and an insulating pad (17) is provided between them.

3. The five-column phase-shifting reactor as described in claim 2, characterized in that: It also includes a power connection plate (9), to which the first neutral terminal (14), the second neutral terminal (15) and the third neutral terminal (16) are simultaneously connected.

4. The five-column phase-shifting reactor as described in claim 3, characterized in that: Each main iron core (1-3) adopts a segmented air gap structure, which is composed of multiple iron core columns and shock-absorbing air gap plates stacked together. The shock-absorbing air gap plates are located between adjacent iron core columns. The main iron core (1-3) is impregnated with paint and dried to become a whole. Glass fiber cloth tape is wrapped around the outside of the main iron core (1-3) and fixed with epoxy resin paint.

5. The five-column phase-shifting reactor as described in claim 4, characterized in that: in An upper base is installed on the upper yoke (1-1) of the iron core and yoke (1), and a lower base is installed on the lower yoke (1-2) of the iron core and yoke (1).

6. The five-column phase-shifting reactor as described in claim 5, characterized in that: The upper base includes two angle steel upper crossbeams, which are located at the front and rear of the upper yoke (1-1) and are fixed together by assembly bolts. The lower base includes two angle steel lower crossbeams, which are located at the front and rear of the lower yoke (1-2) and are fixed together by assembly bolts.

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