High-power high-voltage direct current motor with filter plate

Abstract

The utility model discloses a high-power high-voltage direct current motor with a filter plate, which comprises a motor body, one end of the motor body is provided with the filter plate, the filter plate is provided with a plurality of electromagnetic suppression elements, the filter plate is electrically connected with the motor body, and the filter plate is also provided with at least one annular inductor. Two large-inductance annular inductors and a common-mode inductor are arranged on the filter plate, and a plurality of capacitors are combined to form a multi-stage filter circuit, so that the EMI level of the motor is effectively improved, the structure is simple, the cost is low, and the high-voltage large-current use environment is effectively met.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a high-power high-voltage DC motor with a filter plate. Background Art

[0002] With the development of the times and the advancement of science and technology, more and more motor customers have put forward higher requirements for the electromagnetic interference of motors, which brings greater difficulties to motor design. Among them, the high-voltage AC rectifier motor that uses AC power supply has a constantly changing power supply voltage. As the motor power input, it will cause motor torque fluctuations during motor operation and more serious electromagnetic interference. Therefore, it is more difficult to suppress EMI for motors that use AC rectifier power supply. Generally, it is difficult to control EMI within an acceptable range by only installing capacitors and inductors inside the motor.

[0003] In order to better improve EMI at the motor end, further EMI suppression measures are generally required, usually integrating a filter board on the end cover and using suppression components such as chip capacitors and inductors. This measure can have corresponding options in low voltage and high current or high voltage and low current conditions, but in high power conditions such as high voltage and high current, the solution will become difficult, mainly because the inductor that can withstand high voltage and high current at the same time generally has an inductance of several microhenries to more than ten microhenries, and it is difficult to achieve hundreds to thousands of microhenries, and the improvement effect is not good.

[0004] Therefore, it is urgent to design a high-power high-voltage DC motor with a filter board to overcome the above-mentioned deficiencies of one or more prior arts. Summary of the invention

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a high-power high-voltage DC motor with a filter board, characterized in that it includes a motor body, a filter board is provided at one end of the motor body, a plurality of electromagnetic suppression elements are provided on the filter board, the filter board is electrically connected to the motor body, and at least one toroidal inductor is also provided on the filter board.

[0006] In a preferred embodiment, a thermistor is also provided on the filter board.

[0007] In a preferred embodiment, the electromagnetic suppression element is one or more of a safety capacitor, a common mode inductor, and a rod inductor.

[0008] In a preferred embodiment, a rectifier is also provided on the filter board.

[0009] The beneficial effect of the utility model is that by arranging two large-inductance toroidal inductors and a common-mode inductor on the filter board, and combining a plurality of capacitors to form a multi-stage filter circuit, the EMI level of the motor is effectively improved, and the structure is simple and the cost is low, which effectively meets the use environment of high voltage and high current. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 This is the circuit schematic diagram of the utility model.

[0012] In the figure:

[0013] 10. Motor body; 11. Filter board; 12. Electromagnetic suppression element; 13. Toroidal inductor; 14. Thermistor; 15. Rectifier. Implementation

[0014] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0015] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.

[0016] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0017] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0018] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. Therefore, the utility model is not limited to the specific embodiments disclosed below.

[0019] like Figure 1-Figure 2 As shown, the utility model provides a high-power high-voltage DC motor with a filter plate 11, including a motor body 10, one end of the motor body 10 is provided with a filter plate 11, a plurality of electromagnetic suppression elements 12 are provided on the filter plate 11, the filter plate 11 is electrically connected to the motor body 10, and at least one toroidal inductor 13 is also provided on the filter plate 11.

[0020] Furthermore, a thermistor 14 is also disposed on the filter board 11 .

[0021] Furthermore, in this embodiment, the electromagnetic suppression element is one or more of a safety capacitor, a common mode inductor, and a rod inductor.

[0022] Furthermore, in this embodiment, a rectifier 15 is also provided on the filter board 11 .

[0023] Specifically, the electromagnetic suppression element 12 is used to suppress the electromagnetic waves generated by the motor when it is running. Two toroidal inductors 13 are provided. Since the entire magnetic circuit of the toroidal inductor 13 can be closed along the toroidal core, the magnetic resistance is greatly reduced. By selecting a high magnetic permeability manganese-zinc ferrite core, the inductance can be achieved to thousands of microhenries when the coil wire diameter meets the requirements, and the cost is comparable to that of a general rod inductor, and the structure is simple. At the same time, a thermistor 14 is provided on the filter board 11, so that the motor body 10 has a thermal protection function.

[0024] In summary, the utility model effectively improves the EMI level of the motor by arranging two large-inductance toroidal inductors and a common-mode inductor on the filter board and combining several capacitors to form a multi-stage filter circuit. It has a simple structure and low cost and can effectively meet the use environment of high voltage and high current.

[0025] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A high-power high-voltage DC motor with a filter board, characterized in that: It comprises a motor body, one end of which is provided with a filter board, on which are provided a plurality of electromagnetic suppression elements, the filter board is electrically connected to the motor body, and at least one toroidal inductor is also provided on the filter board.

2. The high-power high-voltage DC motor with a filter board according to claim 1, characterized in that: The filter board is also provided with a thermistor.

3. The high-power high-voltage DC motor with a filter board according to claim 1, characterized in that: The electromagnetic suppression element is one or more of a safety capacitor, a common mode inductor, and a rod inductor.

4. The high-power high-voltage DC motor with a filter board according to claim 1, characterized in that: The filter board is also provided with a rectifier.

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