Claims:[0037] CLAIMS:
We claim:
1. An apparatus to secure the magnets with a rotor yoke, the apparatus comprising:
a. a plurality of magnets (101) having one or more integrated slots (101a);
b. a rotor yoke (102), wherein the rotor yoke (102) having a lateral surface is surrounded by the magnets (101) and
c. a plurality of clips (103), wherein each clip (103) has at-least two vertical flanges (103a and 103b), wherein the first flange (103a) of the clip (103) is inserted and clamped into the lateral surface of the rotor yoke (102) and the second flange (103b) of the clip (103) is inserted and clamped into the slot (101a) of the magnet (101) to provide the magnet (101) retention with the rotor yoke (102).

2. The apparatus as claimed in claim 1, wherein the clips (103) are made through various plastic sources but not limited to steel.

3. The apparatus as claimed in claim 1, wherein the clips (103) are pushed and clamped in-between the outer rotor yoke (102) and the slots (101a) of the magnets (101).

4. The apparatus as claimed in claim 1, wherein the clips (103) are made as per the required shapes and sizes.

5. The apparatus as claimed in claim 1, wherein the clips (103) are positioned adjacent to a peripheral edge of the magnets (101) and are shaped to engage a peripheral edge of the rotor yoke (102).
, Description:[0001] Preamble to the Description
[0002] The following specification particularly describes the invention and the manner in which it is to be performed:
[0003] Description of the invention:
[0004] Technical field of the invention
[0005] The present invention relates to an apparatus to secure the magnets with a rotor yoke without using the adhesive thereof. More particularly, the present invention requires lesser manufacturing time without using higher temperature for curing, without causing any imbalance in the motor operations.
[0006] Background of the invention
[0007] In a permanent-magnet electric machine, the rotor has a structure in which the grooves are extended in the axial direction of a rotor yoke and segment magnets are fixed in each groove of the rotor yoke. In electric machine, the magnets are often secured to the rotor yoke by an adhesive. The magnets are placed and fixed in a specified location with help of adhesive and are cured in ambient temperature or high temperature. The positioning of the magnets on the rotor yoke is a difficult and time consuming It is therefore important that the magnets be precisely placed in a position. Recent developments in the electric machines have led to the development of an apparatus for securing the magnets with a rotor yoke, without causing any imbalance in the motor operations.
[0008] Various types of conventional apparatus for securing the magnet with the rotor yoke are known in the prior art. In convention machines, the magnets used in electric motors are coated or plated to prevent corrosion therein. Here, the adhesive is used for coating or plating the magnets to provide protection against anticorrosion. The adhesive secures the magnet to the rotor and provides the bond between the actual magnet and the rotor. The use of adhesive does not provide strong bonding between the magnet and the rotor and therefore not ideal for securing magnets to the rotor yoke. Typically, the speed of the motor is limited by the strength of the adhesive. The failure of the adhesive bonds could cause the magnets to be dislodged and subsequently damage the motor.
[0009] Conventional machine consumes more manufacturing time for curing and also requires huge investment for the installation of automated line. Typically, the convention machine requires high temperature or ambient temperature for curing the magnet with the rotor yoke. Further, the machine requires more power for curing the rotor yoke with the magnet.
[0010] Hence, there is a need for an apparatus to secure the magnets with a rotor yoke without using the adhesive thereof. More particularly, the present invention requires lesser manufacturing time without using higher temperature for curing, without causing any imbalance in the motor operations
[0011] Summary of the invention:
[0012] The present invention overcomes the drawbacks in the prior art and provides an apparatus to secure the magnets with a rotor yoke in the Brushless DC (BLDC) motors. In a preferred embodiment, the apparatus comprises a plurality of magnets having one or more integrated slots. A rotor yoke having a lateral surface is surrounded by the magnets. A plurality of clips, wherein each clip has at-least two vertical flanges. The first flange of the clip is inserted and clamped into the lateral surface of the rotor yoke and the second flange of the clip is inserted and clamped into the slot of the magnet to provide the magnet retention with the rotor yoke.
[0013] In preferred embodiment of the invention, the clips are pushed and clamped in-between the outer rotor yoke and the slots of the magnets.
[0014] In preferred embodiment of the invention, the clips are made as per the required shapes and sizes.
[0015] In preferred embodiment of the invention, the clips are positioned adjacent to a peripheral edge of the magnets and are shaped to engage a peripheral edge of the rotor yoke.
[0016] The present invention provides a motor which requires less manufacturing time for curing and also does not require huge investment for automated line in motor manufacturing industries. Further, the present invention does not require power for curing the rotor yoke with the magnet and does not require adhesive to secure the magnet with rotor yoke.
[0017] The present invention provides an apparatus for the motor which is simple and easy to assemble and is suitable for the applications in electric machine or motor manufacturing industries.
[0018] It is to be understood that both the foregoing general description and the following details description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
[0019] Brief description of the drawings:
[0020] The foregoing and other features of embodiments will become more apparent from the following detailed description of embodiments when read in conjunction with the accompanying drawings. In the drawings, like reference numerals refer to like elements.
[0021] Figure 1 shows a perspective view of the magnets attached to the rotor yoke, according to one embodiment of the invention.
[0022] Figure 2 shows a perspective view of the magnet, according to one embodiment of the invention.
[0023] Figure 3 shows a perspective view of the clip, according to one embodiment of the invention.
[0024] Figure 4 shows a perspective view of the magnets arranged in the circular manner, according to one embodiment of the invention.
[0025] Figure 5 shows a perspective view of the clips clamped into the lateral surface of the rotor yoke, according to one embodiment of the invention.
[0026] Detailed description of the invention:
[0027] Reference will now be made in detail to the description of the present subject matter, one or more examples of which are shown in figures. Each example is provided to explain the subject matter and not a limitation. Various changes and modifications obvious to one skilled in the art to which the invention pertains are deemed to be within the spirit, scope and contemplation of the invention.
[0028] The present invention provides an apparatus to secure the magnets with a rotor yoke in the Brushless DC (BLDC) motors. The apparatus comprises a plurality of magnets having one or more integrated slots, rotor yoke and one or more clips. The rotor yoke having a lateral surface is surrounded by the magnets. The clips, wherein each clip has at-least two vertical flanges. The first flange of the clip is inserted and clamped into the lateral surface of the rotor yoke and the second flange of the clip is inserted and clamped into the slot of the magnet to provide the magnet retention with the rotor yoke.
[0029] The present invention provides a motor which requires less manufacturing time for curing and also does not require huge investment for automated line in motor manufacturing industries. Further, the present invention does not require power for curing the rotor yoke with the magnet and does not require adhesive to secure the magnet with rotor yoke.
[0030] Figure 1 shows a perspective view of the magnets attached to the rotor yoke, according to one embodiment of the invention. In a preferred embodiment, the apparatus (100) comprises (101) a plurality of magnets (101) having one or more integrated slots (101a), a rotor yoke (102) and one or more clips (103). Each clip (103) has two vertical flanges (103a and 103b). The first flange (103a) of the clip (103) is inserted and clamped into the lateral surface of the rotor yoke (102) and the second flange (103b) of the clip (103) is inserted and clamped into the slot (101a) of the magnet (101). The clips (103) provide the magnet (101) retention with the rotor yoke (102). The rotor yoke (102) having a lateral surface is surrounded by the magnets (101) in a circular manner. The magnets (101) are attached to the outer surface of rotor yoke (102). The clips (103) are used to lock and retain the magnets (101) with the rotor yoke (102). The clips (103) secure the magnets (101) with the rotor yoke (102) by inserting and clamping therein. The clips (103) are pushed and clamped in-between the outer rotor yoke (102) and the integrated slots (101a) in the magnets (101). The clips (103) are made as per the required shape and size. The clips (103) are positioned adjacent to a peripheral edge of the magnets (101) and are shaped to engage a peripheral edge of the rotor yoke (102).
[0031] Figure 2 shows a perspective view of the magnet, according to one embodiment of the invention. In a preferred embodiment, the magnet (101) is designed with the slots (101a). The clips (103) retain the magnet (101) with the rotor yoke (102) by inserting and clamping through the slots (101a) of the magnets (101). The clips (103) are pushed and clamped in-between the outer rotor yoke (102) and the integrated slots (101a) in the magnet (101).
[0032] Figure 3 shows a perspective view of the clip, according to one embodiment of the invention. In a preferred embodiment, each clip (101) has two vertical flanges (103a and 103b). The first flange (103a) of the clip (103) is inserted and clamped into the lateral surface of the rotor yoke (102) and the second flange (103b) of the clip (103) is inserted and clamped into the slot (101a) of the magnet (103). The clips (103) provide the magnet (101) retention with the rotor yoke (102). The clips (103) secure the magnets (101) with the rotor yoke (102) by inserting and clamping therein. The clips (103) are pushed and clamped in-between the outer rotor yoke (102) and the integrated slots (101a) of the magnets (101).
[0033] Figure 4 shows a perspective view of the magnets arranged in the circular manner, according to one embodiment of the invention. In a preferred embodiment, the magnets (101) are designed with the slots (101a). The rotor yoke (102) is surrounded by the magnets (101) in a circular manner. The magnets (101) are attached to the outer surface of rotor yoke (102). The clips (103) retain the magnets (101) with the rotor yoke (102) by inserting and clamping through the slots (101a) of the magnets (101). The clips (103) are pushed and clamped in-between the outer rotor yoke (102) and the integrated slots (101a) in the magnets (101).
[0034] Figure 5 shows a perspective view of the clips clamped into the lateral surface of the rotor yoke, according to one embodiment of the invention. In a preferred embodiment, each clip (101) has two vertical flanges (103a and 103b). The first flange (103a) of the clip (103) is inserted and clamped into the lateral surface of the rotor yoke (102) and the second flange (103b) of the clip (103) is inserted and clamped into the slot (101a) of the magnet (103).
[0035] The present invention provides a motor which requires less manufacturing time for curing and also does not require huge investment for automated line in motor manufacturing industries. Further, the present invention does not require power for curing the rotor yoke with the magnet and does not require adhesive to secure the magnet with rotor yoke.
[0036] The present invention provides an apparatus for the motor which is simple and easy to assemble and is suitable for the applications in electric machine or motor manufacturing industries.