Annular input reactor capable of dissipating heat by means of motor

Abstract

The utility model discloses an annular input reactor capable of dissipating heat by means of a motor, which relates to the technical field of reactors and comprises a reactance structure. The reactance structure comprises an inner yoke ring and a plurality of groups of outer ring yokes arranged on the outer side of the inner yoke ring, a through hole is formed in the middle of the inner yoke ring, and the inner yoke ring and the outer ring yokes are arranged into an integrated structure, so that the integrity of the punching sheet is ensured; a coil corresponding to the inner yoke ring is wound on the outer ring yoke; the reactor structure and the coils are sealed in a filling mode, a large air gap, a magnetic isolation bridge and an adjusting air gap are arranged on an inner yoke ring, and then the three sets of coils are wound on an outer ring yoke, so that the performance of the reactor is guaranteed, manufacturing and magnetic circuit splitting are convenient, and the influence of magnetic circuit saturation on reactor parameters is reduced. The reactor structure and the coil are encapsulated by epoxy resin and are attached to the inner wall of the motor shell, so that the overall strength of the reactor is improved, the heat conduction path is improved, and the heat dissipation effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric reactor, and specifically relates to a ring input electric reactor with motor heat dissipation. BACKGROUND

[0002] The electric reactor is also called an inductor, and is widely applied in circuits. Because of the effect of electromagnetic induction, the electric reactor has certain inductance and can resist current change. When a conductor is electrified, a magnetic field is generated in a certain space range occupied by the conductor. Therefore, all current-carrying conductors have inductance in general sense. With the popularization and application of frequency conversion technology, motor variable frequency drives are more and more widely used. In order to avoid the impact of frequency converter harmonics on the power distribution system, adding an input electric reactor is the most effective method. Most frequency converters have an electric reactor built in the frequency converter, which becomes a standard configuration.

[0003] The existing electric reactor has certain disadvantages in use. The existing electric reactor has the following disadvantages in use: the independent electric reactor is large in size, and the electric reactor and the frequency converter need to be integrated into one frequency converter. After integration with the frequency converter, the frequency converter is large in size, and the electric reactor is poor in heat dissipation. In addition, the existing three-phase ring electric reactor has one ring for each phase, and the three rings are stacked in the axial direction. The axial dimension is large, and the cost is high. The electric reactor cannot meet the needs of people. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the technical problems in the prior art. Therefore, the utility model provides a ring input electric reactor with motor heat dissipation.

[0005] The ring input electric reactor with motor heat dissipation is applied to a driving motor and comprises an electric reactor structure which is detachably installed on the inner side of the tail of the driving motor. The electric reactor structure comprises an inner yoke ring and a plurality of groups of outer ring yokes which are arranged on the outer side of the inner yoke ring. A through hole is arranged in the middle of the inner yoke ring. The inner yoke ring and the outer ring yoke are arranged in an integrated structure to ensure the integrity of the punched sheet. Coils corresponding to the inner yoke ring are wound on the outer ring yokes. The electric reactor structure and the coils are sealed in a filling manner.

[0006] As a further scheme of the utility model, the electric reactor structure is in a cylindrical structure, a plurality of groups of coils are arranged in a circular array on the electric reactor structure, and the number of the plurality of groups of coils is three.

[0007] As a further scheme of the utility model, a plurality of groups of large air gaps for reducing mutual inductance influence between the coils are arranged in a circular array on the inner yoke ring. The vertical section of the large air gap is in a rectangular structure. The large air gap can increase the magnetic resistance and reduce the coupling of magnetic flux between different phases, thereby reducing the mutual inductance influence.

[0008] As a further scheme of the utility model: the both ends of the large air gap are provided with a magnetic isolation bridge for reducing the magnetic flux coupling between the coils of each phase, the magnetic isolation bridge can block or weaken the transmission of magnetic flux between different phases, thereby reducing the mutual inductance influence, the magnetic isolation bridge not only plays a role of magnetic isolation, but also can ensure the integrality of the lamination and the mechanical strength of the overall structure.

[0009] As a further scheme of the utility model: the inner yoke ring is provided with a plurality of groups of adjustment air gaps arranged in a circular array and spaced from the large air gap, the adjustment air gap can significantly affect the performance of the reactor, including the inductance value, Q value, thermal stability and mechanical stability.

[0010] As a further scheme of the utility model: the reactor structure and the coil are filled with epoxy resin, the epoxy resin filling can effectively conduct the heat generated inside the reactor to the outside, improve the heat dissipation efficiency, prevent local overheating, the epoxy resin has high mechanical strength and hardness after curing, can protect the winding and the core, prevent mechanical damage during transportation and installation, the epoxy filling can effectively prevent dust, moisture and other external pollutants from entering the inside of the reactor, improve its protection level, prolong the service life, the epoxy resin has good insulation performance, can further improve the insulation strength of the reactor, prevent electrical faults.

[0011] As a further scheme of the utility model: the driving motor is provided with a motor shell, the reactor structure after filling is attached to the inner wall of the motor shell for heat conduction and heat exchange, thereby improving the heat dissipation effect of the reactor structure.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] (1) the utility model discloses an electric reactor, which comprises an outer ring yoke, an inner yoke ring, a large air gap, a magnetic isolation bridge and an adjustment air gap. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall schematic view of the utility model.

[0015] Figure 2 It is the partial structure drawing of the reactor structure in the utility model.

[0016] Figure 3 It is the partial structure drawing of the reactor structure and the epoxy resin filling in the utility model.

[0017] Figure 4 It is partial structure diagram that driving motor and electric reactance structure are installed in the utility model.

[0018] In the drawing: 1, driving motor; 2, electric reactance structure; 3, inner yoke ring; 4, outer ring yoke; 5, coil; 6, large air gap; 7, magnetic isolation bridge; 8, adjustment air gap; 9, epoxy resin; 10, motor housing; 11, water inlet; 12, water outlet. DETAILED DESCRIPTION

[0019] The technical solutions of the utility model will be described clearly and completely in connection with embodiments, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0020] Embodiment one

[0021] Please refer to Figure 1 - Figure 4 The application provides a circular input electric reactor for cooling motor, applied to driving motor 1, comprising: electric reactance structure 2 detachably installed on the inner side tail of driving motor 1;Wherein, the electric reactance structure 2 includes inner yoke ring 3 and several groups of outer ring yoke 4 arranged on the outer side of inner yoke ring 3, the middle part of inner yoke ring 3 is provided with a through hole, inner yoke ring 3 and outer ring yoke 4 are arranged as an integrated structure, to ensure the integrity of the punching sheet;The outer ring yoke 4 is wound with the coil 5 corresponding to the inner yoke ring 3;The electric reactance structure 2 and the coil 5 are sealed by filling.

[0022] In the embodiment, the electric reactance structure 2 is in cylindrical structure, and the several groups of coils 5 are arranged in circular array on the electric reactance structure 2, and the number of the several groups of coils 5 is three groups.

[0023] In the embodiment, the inner yoke ring 3 is arranged in circular array with several groups of large air gaps 6 for reducing mutual inductance influence between the coils 5, and the vertical section of the large air gap 6 is in rectangular structure, the large air gap 6 can increase the magnetic resistance and reduce the coupling of magnetic flux between different phases, thereby reducing the mutual inductance influence.

[0024] In the embodiment, the two ends of the large air gap 6 are provided with magnetic isolation bridge 7 for reducing the magnetic flux coupling between the coils 5 of each phase, the magnetic isolation bridge 7 can block or weaken the transmission of magnetic flux between different phases, thereby reducing the mutual inductance influence, the magnetic isolation bridge 7 not only plays the role of magnetic isolation, but also can ensure the integrity of the punching sheet and the mechanical strength of the overall structure.

[0025] The inner yoke ring 3 is provided with a plurality of sets of adjustment air gaps 8 arranged in a circular array and spaced apart from the large air gap 6, and the adjustment air gaps 8 can significantly affect the performance of the reactor, including the inductance value, the Q value quality factor, the thermal stability, and the mechanical stability.

[0026] In the embodiment, the reactor structure 2 and the coil 5 are both filled with the epoxy resin 9, the filling of the epoxy resin 9 can effectively conduct the heat generated inside the reactor to the outside, improve the heat dissipation efficiency, prevent local overheating, the epoxy resin 9 has high mechanical strength and hardness after curing, can protect the winding and the core, prevent mechanical damage during transportation and installation, the epoxy filling can effectively prevent dust, moisture and other external pollutants from entering the inside of the reactor, improve the protection level, prolong the service life, the epoxy resin 9 has good insulation performance, which can further improve the insulation strength of the reactor, prevent electrical faults.

[0027] In the embodiment, the driving motor 1 is provided with a motor shell 10, the reactor structure 2 after filling is attached to the inner wall of the motor shell 10 for heat conduction and heat exchange, thereby improving the heat dissipation effect of the reactor structure 2, the motor shell 10 can be provided with a water inlet 11 outside the motor shell 10 near the output shaft of the driving motor 1, and a water outlet 12 matched with the water inlet 11 is arranged at the tail of the outer wall of the motor shell 10, a cooling liquid circulation system can be formed, effectively taking away the heat generated during the operation of the driving motor 1, improving the heat dissipation efficiency, and preventing the driving motor 1 from overheating.

[0028] In the embodiment, the 132kW, 380V ring input reactor can be applied to a water-cooled frequency conversion all-in-one machine, and the ring input reactor uses non-oriented silicon steel sheets with small differences in magnetic conductivity in all directions.

[0029] In summary, the large air gap 6, the magnetic isolation bridge 7 and the adjustment air gap 8 are arranged on the inner yoke ring 3, and then the three sets of coils 5 are wound on the outer ring yoke 4, after the winding of the coils 5 is completed, the reactor structure 2 and the coil 5 are filled with the epoxy resin 9, after the filling is completed, the ring input reactor is installed inside the tail of the driving motor 1 and attached to the inner wall of the motor shell 10, thereby improving the heat dissipation effect.

[0030] The above embodiments are only used to illustrate the technical method of the utility model and not to limit, although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A toroidal input reactor for cooling an electric machine by means of the electric machine, applied to drive an electric machine (1), characterized in that, The utility model relates to a kind of reactive structure (2) of detachable installation in the tail of drive motor (1) inside, comprising: Wherein, the reactive structure (2) includes inner yoke ring (3) and several groups of outer ring yoke (4) arranged outside inner yoke ring (3); The outer ring yoke (4) is wound with coil (5) corresponding with inner yoke ring (3); The reactive structure (2) and coil (5) are sealed by pouring. The reactive structure (2) is cylindrical structure, and several groups of coil (5) are arranged in circular array on the reactive structure (2).

2. A toroidal input reactor with motor cooling according to claim 1, characterized in that, Several groups of large air gap (6) for reducing mutual inductance influence between coil (5) are arranged in circular array on the inner yoke ring (3).

3. A toroidal input reactor with motor cooling according to claim 2, characterized in that, The both ends of the large air gap (6) are provided with magnetic isolation bridge (7) for reducing the magnetic flux coupling between each phase coil (5).

4. A toroidal input reactor with motor cooling according to claim 3, characterized in that, The inner yoke ring (3) is provided with several groups of adjustment air gap (8) arranged at intervals with large air gap (6) in circular array.

5. A toroidal input reactor with motor cooling according to claim 4, characterized in that, The reactive structure (2) and coil (5) are poured by epoxy resin (9).

6. The toroidal input reactor with motor cooling according to claim 1, characterized in that, The drive motor (1) is provided with motor housing (10), and the reactive structure (2) after pouring is attached to the inner wall of motor housing (10).

7. A toroidal input reactor with motor cooling according to claim 6, characterized in that, ​

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