A kind of loose embedded motor rotor coil end fixing structure

Abstract

The utility model relates to motor rotor field, specifically disclose a kind of scattered embedded motor rotor coil end fixing structure, including motor rotor main body, the inside array of motor rotor main body is provided with rotor core, the inside annular array of rotor core is provided with rotor coil, the outside of rotor coil is located the side close to the end of rotor core and is provided with PG band, the side of PG band away from rotor core is located the outside of rotor coil and is provided with single-side limiting band, the outside of single-side limiting band is provided with weftless band. Through the weftless band of being set and limiting band binding structure, through the hoop machine setting suitable binding pre-tightening force, fixed in magnetic pole coil end, and carries out paint solidification, ensure the stability of magnetic pole coil end, and make it in long time operation can be fixed as same kind of form, guarantee the stability of long time operation.

Description

Technical Field

[0001] This utility model relates to the field of motor rotors, specifically a recessed motor rotor coil end fixing structure. Background Technology

[0002] A three-phase synchronous generator is a rotating electrical machine that converts mechanical energy into three-phase alternating current. Its core characteristic is that the rotor speed is strictly synchronized with the grid frequency. It establishes the main magnetic field through DC excitation (wound rotor + slip ring / brushless exciter). In the excitation coil, "excitation" means the generation of magnetic field. A changing current passes through the coil, creating magnetic lines of force along the coil's center. The greater the rate of change of current, the more magnetic lines of force are generated, until saturation. When the current is cut off, the magnetic lines of force disappear. This is called the excitation coil.

[0003] However, when the exciter rotor coil uses a scattered enameled wire structure, the end fixing structure often uses binding ropes. Since the electromagnetic wire diameter is relatively thin, it is easy to deform, resulting in unstable end binding and easy to fall off after long-term operation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a discrete embedded motor rotor coil end fixing structure, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a discrete embedded motor rotor coil end fixing structure, including a motor rotor body, a rotor core arranged in an array inside the motor rotor body, a rotor coil arranged in a ring array inside the rotor core, a PG strip arranged on the outer side of the rotor coil near the end of the rotor core, a single-sided limiting strip arranged on the outer side of the PG strip away from the rotor core and outside the rotor coil, and a non-woven strip arranged on the outer side of the single-sided limiting strip.

[0006] As a further improvement of this utility model: a rotor shaft is installed inside the rotor core, and a slot wedge is provided inside the rotor coil.

[0007] As a further improvement of this utility model: the PG tape is a glass fiber component, and the outer side of the PG tape is impregnated with resin.

[0008] As a further improvement of this utility model, the non-woven belt and the single-sided limiting belt are both fixed after being tied and wound on the outside of the rotor coil.

[0009] As a further improvement of this utility model, the slot wedge is fixedly disposed in the cavity inside the rotor coil.

[0010] As a further improvement of this utility model, a wire clamp is installed at the coil lead position of the rotor coil.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By using a non-woven belt and limit belt binding structure, and by setting an appropriate binding pre-tightening force with a clamping machine, the wire is fixed to the end of the magnetic pole coil and then cured with paint to ensure the stability of the end of the magnetic pole coil and to ensure that it remains in the same shape during long-term operation, thus guaranteeing the stability of long-term operation. Attached Figure Description

[0013] Figure 1 A schematic diagram of a structure for fixing the end of a rotor coil in a discrete embedded motor.

[0014] Figure 2 A partial cross-sectional view of the main body of a motor rotor in a discrete embedded motor rotor coil end fixing structure;

[0015] Figure 3 This is a cross-sectional view of the rotor coil in a discrete embedded motor rotor coil end fixing structure.

[0016] In the diagram: 1. Motor rotor body; 2. Rotor core; 3. Rotor shaft; 4. Rotor coil; 5. PG belt; 6. Weftless belt; 7. Single-sided limiting belt; 8. Slot wedge. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-3 As shown, this embodiment provides a discrete embedded motor rotor coil end fixing structure, including a motor rotor body 1. The rotor body 1 has a rotor core 2 arranged in an array inside. The rotor core 2 has a rotor coil 4 arranged in a ring array inside. The coil lead portion of the rotor coil 4 is fixed to the parallel ring of the rotor coil 4 by wire clamps. A PG strip 5 is provided on the outer side of the rotor coil 4 near the end of the rotor core 2. The PG strip 5 is a glass fiber component and the outer side of the PG strip 5 is impregnated with resin. A single-sided limiting strip 7 is provided on the outer side of the PG strip 5 away from the rotor core 2 and on the outer side of the rotor coil 4. A non-woven strip 6 is provided on the outer side of the single-sided limiting strip 7. Both the non-woven strip 6 and the single-sided limiting strip 7 are fixed after being tied and wound on the outer side of the rotor coil 4. A rotor shaft 3 is installed inside the rotor core 2. A slot wedge 8 is provided inside the rotor coil 4 and is fixedly installed in the cavity inside the rotor coil 4.

[0019] The working principle of this utility model is as follows: The rotor coil 4 is first wound using a thinner enameled wire. The shaped rotor coil 4 is then fitted onto the rear end of the rotor core 2. Inside the wound rotor coil 4, the coil within the slots is fixed using slot wedges 8 and interlayer insulation materials. The lead wire of the rotor coil 4 is then fixed to the parallel loop of the rotor coil 4 using wire clamps. The straight portion of the rotor coil 4 near the end of the rotor core 2 is circumferentially bound with PG tape 5, with the binding thickness not less than the core height 2. Based on mm, the rotor coil 4 is then secured by clamping the end of the rotor coil 4 on one side of the PG belt 5 with a single-sided limiting belt 7 and a non-woven belt 6. During clamping, the clamping force is set according to the centrifugal force of the rotor coil 4, so that the overall thickness of the non-woven belt 6 and the single-sided limiting belt 7 is not less than 5 mm, and the height of the non-woven belt 6 and the single-sided limiting belt 7 after binding does not exceed the height of the rotor core 2. Finally, the entire rotor coil 4 is painted and dried along with the rotor core 2 to ensure that the rotor coil operates stably under the action of centrifugal force.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A recessed motor rotor coil end fixing structure, comprising a motor rotor body (1), characterized in that, The rotor body (1) of the motor is provided with an internal array of rotor cores (2), and the rotor cores (2) are provided with an internal annular array of rotor coils (4). A PG belt (5) is provided on the outer side of the rotor coils (4) near the end of the rotor cores (2). A single-sided limiting belt (7) is provided on the outer side of the PG belt (5) away from the rotor cores (2) and on the outer side of the rotor coils (4). A non-woven belt (6) is provided on the outer side of the single-sided limiting belt (7).

2. The embedded rotor coil end fixing structure according to claim 1, characterized in that, The rotor core (2) has a rotor shaft (3) installed inside, and the rotor coil (4) has a slot wedge (8) inside.

3. The embedded rotor coil end fixing structure according to claim 1, characterized in that, The PG tape (5) is a glass fiber material component, and the outer side of the PG tape (5) is impregnated with resin.

4. The embedded motor rotor coil end fixing structure according to claim 1, characterized in that, The non-woven belt (6) and the single-sided limiting belt (7) are both fixed after being tied and wound on the outside of the rotor coil (4).

5. The embedded rotor coil end fixing structure according to claim 2, characterized in that, The slot wedge (8) is fixedly disposed in the cavity inside the rotor coil (4).

6. The embedded rotor coil end fixing structure according to claim 1, characterized in that, A wire clamp is installed at the coil lead position of the rotor coil (4).

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