Novel shaft embedded brush power transfer for separately excited machine power

Abstract

The invention relates to a novel shaft embedded brush power transfer for separately excited machine power. A power transfer system for a separately excited machine includes a positive slip ring and a negative slip ring. One or more positive brushes and one or more negative brushes. The rotor winding is attached to the rotor lamination and the stator winding is attached to the stator lamination such that the stator winding is outside of the rotor winding. The power transfer system may have a hollow shaft. The power transfer system may also have a negative brush and a negative slip ring external to the hollow shaft; and one or more position sensors. The shaft inlet separator may be located within the hollow shaft and may act as a barrier between the humid region and the dry region. The power transfer system may also include a positive wire and a negative wire, which may be inverted.

Description

Technical Field

[0001] The present disclosure relates to brush power transfer for separately excited machines. Currently, there are few techniques for using brush power transfer mechanisms for separately excited machines. Summary of the invention

[0002] A power transfer system for a separately excited motor includes: a positive slip ring; a negative slip ring; one or more positive brushes in operative contact with the positive slip ring; one or more negative brushes in operative contact with the negative slip ring. The rotor winding is attached to the rotor laminations, which are usually located outside the positive slip ring. The stator winding is attached to the stator laminations so that the stator winding is located outside the rotor winding.

[0003] The power transfer system may be attached to the hollow shaft such that the rotor laminations are pressed onto the hollow shaft. The negative brushes and negative slip rings may be located outside the hollow shaft. The power transfer system may include one or more position sensors. A shaft inlet separator may be included within the hollow shaft.

[0004] The power transfer system may have positive and negative wires, and a brush holder such that the brush holder supports the positive and negative wires. There may be at least one set of bearings.

[0005] A vehicle having a brush transfer system for a separately excited motor, the brush transfer system comprising: a positive brush; a negative brush; one or more positive brushes in operative contact with a positive slip ring; one or more negative brushes in operative contact with a positive slip ring. The rotor winding is operatively attached to one or more rotor laminations located outside the positive slip ring, and the stator winding is operatively attached to one or more stator laminations such that the stator winding is located outside the rotor winding. The brush transfer system may have a hollow shaft such that the rotor laminations are pressed onto the hollow shaft. A shaft inlet separator may be included in the hollow shaft such that the shaft inlet separator is a barrier between a wet area and a dry area. The brush holder may be included in the hollow shaft and at least one set of bearings.

[0006] The brush transfer system may have a positive wire and a negative wire, such that the brush holder supports the positive wire and the negative wire. The brush transfer system may have one or more position sensors. In other configurations, the brush transfer system may have a positive brush holder located within the hollow shaft, and a negative brush holder such that the negative brush and negative slip ring are located outside the hollow shaft.

[0007] The present invention also discloses the following technical solution:

[0008] Solution 1. A power transmission system for a separately excited motor, the power transmission system comprising:

[0009] Positive slip ring;

[0010] Negative slip ring;

[0011] one or more positive brushes in operative contact with the positive slip ring;

[0012] one or more negative brushes in operative contact with the negative slip ring;

[0013] a rotor winding attached to rotor laminations, the rotor laminations being located outside the positive slip rings; and

[0014] A stator winding is attached to the stator laminations, wherein the stator winding is located outside the rotor winding.

[0015] Solution 2. The power transmission system according to solution 1, further comprising:

[0016] A hollow shaft, wherein the rotor laminations are pressed onto the hollow shaft.

[0017] Option 3. The power transfer system according to Option 2, wherein the negative brush and the negative slip ring are located outside the hollow shaft.

[0018] Solution 4. The power transmission system according to Solution 3, further comprising:

[0019] One or more position sensors.

[0020] Solution 5. The power transmission system according to Solution 4, further comprising:

[0021] A shaft inlet separator is located within the hollow shaft.

[0022] Solution 6. The power transmission system according to Solution 5, further comprising:

[0023] Positive wire;

[0024] Negative cable; and

[0025] A brush holder, wherein the brush holder supports the positive wire and the negative wire.

[0026] Option 7. The power transmission system according to Option 6, further comprising:

[0027] At least one set of bearings.

[0028] Option 8. The power transmission system according to Option 2, further comprising:

[0029] A shaft inlet separator is located within the hollow shaft.

[0030] Solution 9. The power transmission system according to solution 8, further comprising:

[0031] One or more position sensors.

[0032] Option 10. The power transmission system according to Option 9, further comprising:

[0033] a positive brush holder located within the hollow shaft; and

[0034] A negative brush holder is located outside the hollow shaft.

[0035] Solution 11. A brush transfer system for a separately excited motor, the brush transfer system comprising:

[0036] Positive brush;

[0037] Negative brush;

[0038] one or more positive brushes in operative contact with the positive slip ring;

[0039] one or more negative brushes in operative contact with the positive slip ring;

[0040] a rotor winding attached to one or more rotor laminations and located outside the positive slip ring;

[0041] a stator winding attached to one or more stator laminations, wherein the stator winding is located outside the rotor winding;

[0042] a hollow shaft, wherein the rotor laminations are pressed onto the hollow shaft; and

[0043] A shaft inlet separator is located within the hollow shaft, wherein the shaft inlet separator is a barrier between a wet area and a dry area.

[0044] Embodiment 12. The power transmission system according to embodiment 11, further comprising:

[0045] One or more position sensors.

[0046] Embodiment 13. The power transmission system according to embodiment 12 further comprises:

[0047] a brush holder located in the hollow shaft; and

[0048] At least one set of bearings.

[0049] Embodiment 14. The power transmission system according to embodiment 13, further comprising:

[0050] A negative brush holder, wherein the negative brush and the negative slip ring are located outside the hollow shaft.

[0051] Solution 15. A vehicle having a brush transfer system for a separately excited motor, the brush transfer system comprising:

[0052] Positive brush;

[0053] Negative brush;

[0054] one or more positive brushes in operative contact with the positive slip ring;

[0055] one or more negative brushes in operative contact with the positive slip ring;

[0056] a rotor winding attached to one or more rotor laminations located outside the positive slip ring;

[0057] a stator winding attached to one or more stator laminations, wherein the stator winding is located outside the rotor winding;

[0058] a hollow shaft, wherein the rotor laminations are pressed onto the hollow shaft;

[0059] a shaft entry separator located within the hollow shaft, wherein the shaft entry separator is a barrier between a wet area and a dry area;

[0060] a brush holder located in the hollow shaft; and

[0061] At least one set of bearings.

[0062] Solution 16. The vehicle having a brush transmission system according to Solution 15, further comprising:

[0063] Positive cable; and

[0064] Negative wire, wherein the brush holder supports the positive wire and the negative wire.

[0065] Solution 17. A vehicle having a brush transmission system according to Solution 16, further comprising:

[0066] One or more position sensors.

[0067] Solution 18. A vehicle having a brush transmission system according to Solution 15, wherein the brush holder further comprises:

[0068] a positive brush holder located within the hollow shaft; and

[0069] A negative brush holder, wherein the negative brush and the negative slip ring are located outside the hollow shaft.

[0070] Solution 19. A vehicle having a brush transmission system according to Solution 18, further comprising:

[0071] One or more position sensors.

[0072] The above features and advantages and other features and advantages of the present disclosure are readily apparent from the following detailed description of the best modes for carrying out the disclosure when taken in connection with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1A is a schematic diagram of a front view of a brush power transfer mechanism for a separately excited motor.

[0074] Figure 1B is a schematic diagram of a side view of a brush power transfer mechanism for a separately excited motor.

[0075] Figure 2 is a schematic diagram of a brush power transfer mechanism for a separately excited motor that can be used in a dry environment.

[0076] Figure 3 is a schematic diagram of a brush power transfer mechanism for a separately excited motor that can be used in a wet environment.

[0077] Figure 4A is a schematic diagram of a front view of a brush power transfer mechanism for a separately excited motor having an external negative brush.

[0078] Figure 4B is a schematic diagram of a side view of a brush power transfer mechanism for a separately excited motor having an external negative brush. DETAILED DESCRIPTION

[0079] Referring to the drawings, like reference numerals refer to similar parts whenever possible. In general, a separately excited machine is a machine in which the field windings or coils are excited by a separate or external source. The flux produced by the poles depends on the field current (i.e., the flux is proportional to the field current) for regions where the magnetic material of the poles is unsaturated, but in the saturated region, the flux remains constant.

[0080] Figure 1A is a schematic diagram of a front view of a brush power transfer mechanism (or simply referred to as a brush mechanism) 10 for a separately excited motor. Figure 1B 1 is a schematic diagram of a side view of the brush mechanism 10 . The brush mechanism 10 includes a positive wire 12 and a negative wire 14 .

[0081] The positive wire 12 and / or the negative wire 14 may be carried or otherwise supported by a brush holder 15. The brush mechanism 10 includes at least one positive slip ring 16 and at least one negative slip ring 18. Note that in some configurations, the positive wire 12 and the negative wire 14 may be reversed.

[0082] The brush mechanism 10 further includes one or more positive brushes 22 and one or more negative brushes 24. Additionally, a hollow shaft 26 is included in the brush mechanism 10, and the positive brush 22 may be located within the hollow shaft 26. Note that the hollow shaft 26 is cut off, but may extend further.

[0083] The drawings and figures presented herein are simplified diagrams, not drawn to scale, and are provided purely for descriptive purposes. Therefore, any specific or relative dimensions or alignments shown in the drawings will not be interpreted as limiting. Although the present disclosure may be illustrated with respect to a specific application or industry, those skilled in the art will recognize the wider applicability of the present disclosure. Those of ordinary skill in the art will recognize that terms such as "above", "below", "upward", "downward", etc. are used to describe the figures and do not represent limitations on the scope of the present disclosure as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and are not intended to limit the scope of the present disclosure in any way.

[0084] Features shown in one figure may be combined with, replace, or be modified by features shown in any figure. Unless otherwise stated, features, elements, or limitations are not mutually exclusive with any other features, elements, or limitations. In addition, features, elements, or limitations are not absolutely required for operation. Any specific configuration shown in the figures is merely illustrative, and the specific configuration shown does not limit the claims or description.

[0085] The term vehicle applies broadly to any mobile platform. Vehicles into which the present disclosure may be incorporated include, for example, but not limited to: passenger or freight vehicles; autonomous vehicles; industrial, construction, and mining equipment; and various types of aircraft.

[0086] All numerical values ​​of parameters (e.g., quantities or conditions) in this specification (including the appended claims) will be understood to be modified by the term "approximately" in all cases, whether or not the term actually appears before the numerical value. Approximately indicates that the stated numerical value allows a certain slight imprecision (close to the exact value in some way; approximately or reasonably close to the value; almost). If the imprecision provided by approximately is not otherwise understood in this ordinary meaning in the art, approximately as used herein at least indicates the changes that may be caused by the ordinary methods of measuring and using such parameters. In addition, the disclosure of the range includes the disclosure of all values ​​within the entire range and the further divided ranges. Each value within the range and the endpoints of the range are hereby all disclosed as separate embodiments.

[0087] As used herein, the term "substantially" often refers to an ideally perfect or complete relationship, but where manufacturing realities prevent absolute perfection. Thus, substantially represents a typical deviation from perfection. For example, if height A is substantially equal to height B, it may be preferred that the two heights be 100.0% equal, but manufacturing realities may well result in deviations from such perfection. A skilled artisan will recognize an acceptable amount of variation. For example, but not limited to, coverage, area, or distance may typically be within 10% of substantially equivalent perfection. Similarly, relative alignment (such as, parallel or perpendicular) may typically be considered to be within 5%.

[0088] A general control system, computing system, or controller is in operative communication with all of the system's relevant components and can be identified by one of ordinary skill in the art. A controller includes, for example, but not limited to, a non-general purpose electronic control device having a pre-programmed digital computer or processor, a memory, storage device, or non-transitory computer-readable storage medium for storing data (such as control logic, instructions, lookup tables, etc.), and a plurality of input / output peripherals, ports, or communication protocols.

[0089] In addition, the controller may include or communicate with multiple sensors. The controller is configured to execute or implement all control logic or instructions described herein and may communicate with any sensor described herein or identifiable by a skilled person. Any method described herein may be performed by one or more controllers.

[0090] Figure 2 is a schematic diagram of a brush mechanism 10 that can be used in a dry environment. Figure 3 is a schematic diagram of a brush mechanism 10 that can be used in a wet environment.

[0091] The brush mechanism 10 has one or more rotor laminations 30 or rotor poles 30 that may be pressed onto the hollow shaft 26 or otherwise attached. The rotor windings 32 are typically attached to the rotor laminations 30. The stator laminations 34 or stator poles 34 are operatively attached to the stator windings 36. In most cases, the stator windings 36 are located outside the rotor windings 32.

[0092] The brush mechanism 10 may have a shaft inlet separator 28 located within the hollow shaft 26. The shaft inlet separator 28 may be used to separate one or more dry areas from one or more wet areas. The brush mechanism 10 may have one or more position sensors 40, which may be located inside or outside the hollow shaft 26. Note that position sensors 40 are not shown in all figures because they may not be needed.

[0093] Positive wires 42 and negative wires 44 connect the positive wires 12 and negative wires 14 to the rotor laminations 30 and stator laminations 34. Note that, like the positive wires 12 and negative wires 14, in some configurations, the positive wires 42 and negative wires 44 can be reversed. As shown in the figure, at least one set of bearings 46, there are usually two sets of bearings 46.

[0094] Figure 4A is a schematic diagram of a front view of the brush mechanism 10 , wherein the negative slip ring 18 is located outside the hollow shaft 26 . Figure 4B is a schematic diagram of a side view of a brush mechanism 10, with both the outer negative brush 24 and the negative slip ring 18 located outside the hollow shaft 26. This version includes a negative brush holder 48, so that there is a positive brush holder 15. Note that in all cases, the positive wire 12 and the negative wire 14 and all related components can be switched depending on the configuration.

[0095] Among the benefits of the brush mechanism 10 are, but are not limited to, the following: reduced need for increased axial length due to rotor power transfer required for a separately excited motor; higher speed operation; optimized heat rejection and heat dissipation in wet environment type situations; the power transfer is placed inside the hollow shaft, and the shaft acts as a shield to mitigate external electromagnetic interference (EMI); elimination of the need for a dry environment to house the rotor power transfer and additional components (such as, sealed bearings); cost savings by eliminating wear items (such as, brushes for rotor power transfer); and / or reduced risk of generating brush wear debris and friction losses due to moving interface contacts and contact loss arcs.

[0096] The detailed description and accompanying drawings or figures support and describe the subject matter herein.While some best modes and other embodiments have been described in detail, various alternative designs, embodiments and configurations exist.

[0097] Furthermore, the features of any example shown in the drawings or the various examples mentioned in this description do not have to be understood as examples independent of one another. On the contrary, it is possible that each of the features described in one of the examples of the embodiment can be combined with one or more other desired features from other examples, thereby producing other examples that are not described in words or by reference to the drawings. Therefore, such other examples fall within the framework of the scope of the appended claims.

Claims

1. A power transmission system for a separately excited motor, the power transmission system comprising: Positive slip ring; Negative slip ring; one or more positive brushes in operative contact with the positive slip ring; one or more negative brushes in operative contact with the negative slip ring; a rotor winding attached to a rotor lamination, the rotor lamination being located outside the positive slip ring; as well as A stator winding is attached to the stator laminations, wherein the stator winding is located outside the rotor winding.

2. The power transfer system of claim 1 , further comprising: A hollow shaft, wherein the rotor laminations are pressed onto the hollow shaft.

3. The power transfer system of claim 2, wherein: The negative brush and the negative slip ring are located outside the hollow shaft.

4. The power transfer system of claim 3, further comprising: One or more position sensors.

5. The power transfer system of claim 4, further comprising: A shaft inlet separator is located within the hollow shaft.

6. The power transfer system of claim 5, further comprising: Positive wire; Negative wire; as well as A brush holder, wherein the brush holder supports the positive wire and the negative wire.

7. The power transfer system of claim 6, further comprising: At least one set of bearings.

8. The power transfer system of claim 2, further comprising: A shaft inlet separator is located within the hollow shaft.

9. A brush transfer system for a separately excited motor, the brush transfer system comprising: Positive brush; Negative brush; one or more positive brushes in operative contact with the positive slip ring; one or more negative brushes in operative contact with the positive slip ring; a rotor winding attached to one or more rotor laminations and located outside the positive slip ring; a stator winding attached to one or more stator laminations, wherein the stator winding is located outside the rotor winding; a hollow shaft, wherein the rotor laminations are pressed onto the hollow shaft; and A shaft inlet separator is located within the hollow shaft, wherein the shaft inlet separator is a barrier between a wet area and a dry area.

10. A vehicle having a brush transmission system for a separately excited motor, the brush transmission system comprising: Positive brush; Negative brush; one or more positive brushes in operative contact with the positive slip ring; one or more negative brushes in operative contact with the positive slip ring; a rotor winding attached to one or more rotor laminations located outside the positive slip ring; a stator winding attached to one or more stator laminations, wherein the stator winding is located outside the rotor winding; a hollow shaft, wherein the rotor laminations are pressed onto the hollow shaft; a shaft entry separator located within the hollow shaft, wherein the shaft entry separator is a barrier between a wet area and a dry area; a brush holder located in the hollow shaft; and At least one set of bearings.

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