Rotor structure of double-skewed-slot rotor induction motor

Abstract

The utility model relates to a rotor structure of a double-skewed slot rotor induction motor, which structurally comprises a rotor body, an end ring is arranged at the end part of the rotor body, the rotor body comprises two layers of conducting bars, and the end ring is of a center concave structure with a C-shaped cross section. A middle short circuit ring is arranged between two layers of conducting bars of the rotor body. The rotor end ring has the advantages that the rotor end ring is reasonable in structural design, the shape of the rotor end ring is optimized and improved, the middle short circuit ring is added, the problems that a double-skewed-groove rotor is large in pressure casting difficulty and prone to generating shrinkage cavities and thin strips can be solved, the heat capacity of the rotor end ring can be reduced during pressure casting, shrinkage stress is small, molten aluminum mold filling is smooth, and the rotor pressure casting quality can be improved.

Description

Technical Field

[0001] The utility model relates to a motor rotor structure, in particular to a rotor structure of a double-skewed slot rotor induction motor driven by variable frequency. Background Art

[0002] In the existing technology, the rotor structure of the double-skewed slot rotor induction motor is difficult to die-cast and is prone to problems such as shrinkage cavities and thin strips. This is mainly due to the high heat capacity of the rotor end ring, large shrinkage stress, and uneven filling of the molten aluminum, resulting in insufficient rotor filling, reduced motor efficiency, increased temperature rise, and insufficient quality stability. Utility Model Content

[0003] The utility model provides a double-skewed slot rotor induction motor rotor structure, which aims to overcome the above-mentioned shortcomings of the prior art, reduce the generation of shrinkage cavities and thin strips during rotor die-casting, and improve the rotor die-casting quality.

[0004] The technical solution of the utility model is a double-skewed slot rotor induction motor rotor structure, which includes a rotor body, an end ring is provided at the end of the rotor body, the rotor body includes two layers of guide bars, and the end ring is a central concave structure with a C-shaped cross section.

[0005] Preferably, an intermediate short-circuit ring is provided between the two layers of conductive bars of the rotor body.

[0006] The advantages of this utility model are: reasonable structural design, optimized and improved shape of the rotor end ring, and an intermediate short-circuit ring is added, which can solve the problems of difficulty in die-casting of double-skewed slot rotors and easy generation of shrinkage cavities and thin strips. During die-casting, the heat capacity of the rotor end ring can be reduced, the shrinkage stress is small, the aluminum liquid is filled smoothly, and the rotor die-casting quality can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The utility model is a schematic structural diagram of the rotor structure of a double-skewed slot rotor induction motor.

[0008] In the figure, 1 is the end ring, 2 is the intermediate short-circuit ring, 3 is the rotor core, and 31 is the conductor bar. DETAILED DESCRIPTION

[0009] The present invention will be further described in detail below with reference to the embodiments and specific implementation methods.

[0010] like Figure 1 As shown, a double-skewed slot rotor induction motor rotor structure includes a rotor body, an end ring 1 is provided at the end of the rotor body, and the rotor body includes two layers of conductive bars 31. The improvement is that the end ring 1 has a central concave structure with a C-shaped cross-section, and an intermediate short-circuit ring 2 is provided between the two layers of conductive bars 31 of the rotor body.

[0011] When the concave structure of the end ring 1 is specifically designed, the groove width is 1 / 3-1 / 2 of the width of the end ring 1, and the groove depth is 1 / 3-1 / 2 of the thickness of the end ring 1.

[0012] The end ring 1 is changed from the conventional T-shaped end ring in the prior art to a concave shape, and an intermediate short-circuit ring 2 is added, which can reduce the heat capacity of the end ring 1 during die-casting, reduce the shrinkage stress, and smoothly fill the mold with molten aluminum, thereby reducing the generation of shrinkage cavities and thin strips, thereby improving the die-casting quality of the rotor.

[0013] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A double-skewed slot rotor induction motor rotor structure, characterized in that: The invention comprises a rotor body, an end ring (1) is provided at the end of the rotor body, the rotor body comprises two layers of guide bars (31), the end ring (1) is a central concave structure with a C-shaped cross section; an intermediate short-circuit ring (2) is provided between the two layers of guide bars (31) of the rotor body.

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