Simulation method for simulating turn-to-turn short circuit of motor

Abstract

The invention discloses a simulation method for simulating a turn-to-turn short circuit of a motor. The method comprises the following steps: S1, building a two-dimensional geometric model of the motor; s2, simulating a winding geometric model of the turn-to-turn short circuit, independently modeling and defining a concentrated turn of coil of the winding, and re-performing phase splitting on the winding to provide a basis for setting a turn-to-turn short circuit fault point; s3, simulating an external circuit model of the turn-to-turn short circuit, drawing a schematic circuit diagram by using simulation software, adding a short circuit branch, a load and a measurement module, and setting parameters of each element to ensure the authenticity of simulation; and S4, after the model and the analog circuit are built, simulation calculation can be carried out, and further fault analysis can be carried out through data of a measurement module in the analog circuit. According to the method, simulation analysis and early detection of the turn-to-turn short circuit fault of the shaft permanent magnet motor are realized through software simulation calculation, so that a new reference is provided for protection design of the shaft permanent magnet motor, and the influence of equipment faults on ship operation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shaft-belt permanent magnet generators, and in particular to a simulation method for simulating motor inter-turn short circuit. Background Art

[0002] With the increasing scarcity of energy, shaft-belt permanent magnet generators have gradually become an important part of modern ship power systems due to their high efficiency, compactness and reliability. However, with the increasing number of shaft-belt permanent magnet motors in practical applications, their potential failure risks have also attracted attention. Among these failures, turn-to-turn short circuits have become the focus of motor failure analysis due to their hidden and destructive nature. In response to this trend, some classification societies have gradually added fault analysis report requirements for shaft-belt permanent magnet motors in their ship inspection standards, thereby reducing the impact of equipment failures on ship operations. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a simulation method for simulating motor turn-to-turn short circuit, using simulation software to build a model to simulate the motor turn-to-turn short circuit working condition.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A simulation method for simulating a motor turn-to-turn short circuit comprises the following steps:

[0006] S1: Build a two-dimensional geometric model of the motor, including key components such as the stator, rotor, winding, core and air gap;

[0007] S2: Simulate the winding geometry model of inter-turn short circuit, define the concentrated one-turn coil of the winding separately, and re-phase the winding to provide a basis for setting the inter-turn short circuit fault point;

[0008] S3: Simulate the external circuit model of turn-to-turn short circuit. Use simulation software to draw the circuit schematic diagram, add short-circuit branches, loads, and measurement modules, and set the parameters of each component to ensure the authenticity of the simulation. Add turn-to-turn short-circuit switches and simulate the occurrence of short circuits by controlling the switch closure.

[0009] S4: After the model and simulation circuit are built and set up, simulation calculations can be performed. Further fault analysis can be performed based on the data of the measurement module in the simulation circuit.

[0010] The beneficial effects of the present invention are:

[0011] The present invention realizes simulation analysis and early detection of inter-turn short-circuit faults of shaft-belt permanent magnet motors through software simulation calculation, thereby providing a new reference for the protection design of shaft-belt permanent magnet motors and reducing the impact of equipment failures on ship operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0013] Figure 1 It is a schematic diagram of a two-dimensional geometric model of the motor of the present invention;

[0014] Figure 2 A schematic diagram of a winding geometric model for simulating turn-to-turn short circuit according to the present invention;

[0015] Figure 3 A schematic diagram for separately modeling and defining a concentrated one-turn coil of the winding of the present invention;

[0016] Figure 4 This is a schematic diagram of an external circuit model for simulating turn-to-turn short circuits according to the present invention;

[0017] Figure 5 For the present invention Figure 4 A magnified schematic of the circuit in the mid-turn short-circuit switch area. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Example

[0020] Reference Figure 1-5 , a simulation method for simulating motor turn-to-turn short circuit, comprising the following steps:

[0021] S1: Build Figure 1 The 2D geometric model of the motor shown includes key components such as the stator, rotor, winding, core and air gap;

[0022] S2: Simulate Figure 2 The winding geometry model with inter-turn short circuit is shown in Figure 3 As shown, the concentrated one-turn coil of the winding is separately modeled and defined, and the winding is re-phased to provide a basis for setting the inter-turn short-circuit fault point;

[0023] S3: Simulate Figure 4 The external circuit model of the turn-to-turn short circuit shown in the figure uses simulation software to draw the circuit schematic diagram, add the short-circuit branch, load and measurement module, and set the parameters of each component to ensure the authenticity of the simulation. Add the turn-to-turn short-circuit switch and simulate the occurrence of the short circuit by controlling the switch to close.

[0024] S4: After the model and simulation circuit are built and set up, simulation calculations can be performed. Further fault analysis can be performed based on the data of the measurement module in the simulation circuit.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A simulation method for simulating motor turn-to-turn short circuit, characterized in that: The following steps are involved: S1: Build a two-dimensional geometric model of the motor, including key components such as the stator, rotor, winding, core and air gap; S2: Simulate the winding geometry model of inter-turn short circuit, define the concentrated one-turn coil of the winding separately, and re-phase the winding to provide a basis for setting the inter-turn short circuit fault point; S3: Simulate the external circuit model of turn-to-turn short circuit. Use simulation software to draw the circuit schematic diagram, add short-circuit branches, loads, and measurement modules, and set the parameters of each component to ensure the authenticity of the simulation. Add turn-to-turn short-circuit switches and simulate the occurrence of short circuits by controlling the switch closure. S4: After the model and simulation circuit are built and set up, simulation calculations can be performed. Further fault analysis can be performed based on the data of the measurement module in the simulation circuit.

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