The present disclosure relates to the field of solenoids. More
particularly the present disclosure relates to an electromagnetic solenoid with shading rings in the moving electromagnet.
BACKGROUND
[0002] Background description includes information that may be useful in
understanding the present invention. It is not an admission that any of the
information provided herein is prior art or relevant to the presently claimed
invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Conventionally, in electromagnetic solenoid, to generate the
electromagnetic force by electromagnetic solenoid, fixed electromagnet and
moving electromagnet placed inside the main coil apart by spring between them.
When the current flows through a main primary coil, magnetic field is produced in
the fixed electromagnet and moving electromagnet. Moving electromagnet attract
towards the fixed electromagnet due to electromagnetic force of coil. When
generated electromagnetic force between moving electromagnet and fixed
electromagnet become greater than spring force, moving electromagnet is
attracted towards the fixed electromagnet. When there is no current in the coil,
moving electromagnet returns to its initial position due to return spring force.
[0004] In AC electromagnetic solenoid shading ring is grooved inside the
fixed core. Shading ring acts like a secondary of transformer. The current in the shading ring is ideally 90° out of phase with the current in the primary coil. Shading ring causes efficient generation of a flux component with an amplitude nearly as large as the flux in the primary coil. This is useful in reducing chatter due to bounce back tendency of the moving electromagnet at each zero position of ac input waves. However, Insufficient flux generates sometimes to attract the moving core. This can lead to humming and chattering noise of armature observed with AC supply. Also, large amount of current flowing through the single shading ring as per the area of shading ring leads to excessive heating.

[0005] There is, therefore, a need of an improved electromagnetic
solenoid which is free from the above discussed problems.
OBJECTS OF THE PRESENT DISCLOSURE
[0006] Some of the objects of the present disclosure, which at least one
embodiment herein satisfies are as listed herein below.
[0007] It is an object of the present disclosure to provide an
electromagnetic solenoid, which is free from humming and chattering noise of
armature observed with AC supply.
[0008] It is an object of the present disclosure to provide an
electromagnetic solenoid, which is free from excessive heating problem.
[0009] It is an object of the present disclosure to provide an
electromagnetic solenoid, which is cost effective.
[0010] It is an object of the present disclosure to provide an
electromagnetic solenoid, which is easy to use.
SUMMARY
[0011] The present disclosure relates to the field of solenoids. More
particularly the present disclosure relates to an electromagnetic solenoid with shading rings in the moving electromagnet.
[0012] An aspect of the present disclosure pertains to an electromagnetic
solenoid including a moving electromagnet, a fixed electromagnet. An elastic member configured between the moving electromagnet and the fixed electromagnet, and the elastic member is configured to provide resistance to the movement of the moving electromagnet towards the fixed electromagnet. A solenoid coil configured around the fixed electromagnet and the moving electromagnet, and an alternate current is configured to pass through the solenoid coil to generate an electromagnetic force to pull the moving electromagnet towards the fixed electromagnet. A first shading ring configured in the fixed electromagnet and a second shading ring configured in the moving electromagnet. The first shading ring and the second shading ring are configured such that a

resultant magnetic flux generated by the first shading ring and the second shading
ring is equal to a sum of individual magnetic fields generated by the first shading
ring and the second shading ring.
[0013] In an aspect, when the alternate current in the solenoid coil ceases,
the moving electromagnet may be pushed back to initial position by the elastic
member.
[0014] In an aspect, the first shading ring and the second shading ring may
act as parallel electric circuit.
[0015] In an aspect, the first shading ring and the second shading ring may
be made of any of conducive material such as copper, and aluminium.
[0016] Various objects, features, aspects and advantages of the inventive
subject matter will become more apparent from the following detailed description
of preferred embodiments, along with the accompanying drawing figures in which
like numerals represent like components.
BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings are included to provide a further
understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure.
[0018] In the figures, similar components and/or features may have the
same reference label. Further, various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
[0019] FIG. 1 illustrates an exemplary representation of electromagnetic
solenoid, in accordance with an embodiment of present disclosure.

DETAILED DESCRIPTION
[0020] The following is a detailed description of embodiments of the
disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[0021] In the following description, numerous specific details are set forth
in order to provide a thorough understanding of embodiments of the present
invention. It will be apparent to one skilled in the art that embodiments of the
present invention may be practiced without some of these specific details.
[0022] The present disclosure relates to the field of solenoids. More
particularly the present disclosure relates to an electromagnetic solenoid with shading rings in the moving electromagnet.
[0023] The present disclosure elaborates upon an electromagnetic solenoid
including a moving electromagnet, a fixed electromagnet. An elastic member configured between the moving electromagnet and the fixed electromagnet, and the elastic member is configured to provide resistance to the movement of the moving electromagnet towards the fixed electromagnet. A solenoid coil configured around the fixed electromagnet and the moving electromagnet, and an alternate current is configured to pass through the solenoid coil to generate an electromagnetic force to pull the moving electromagnet towards the fixed electromagnet. A first shading ring configured in the fixed electromagnet and a second shading ring configured in the moving electromagnet. The first shading ring and the second shading ring are configured such that a resultant magnetic flux generated by the first shading ring and the second shading ring is equal to a sum of individual magnetic fields generated by the first shading ring and the second shading ring.

[0024] In an embodiment, when the alternate current in the solenoid coil
ceases, the moving electromagnet can be pushed back to initial position by the
elastic member.
[0025] In an embodiment, the first shading ring and the second shading
ring can act as parallel electric circuit.
[0026] In an embodiment, the first shading ring and the second shading
ring can be made of any of conducive material such as copper, and aluminium.
[0027] FIG. 1 illustrates an exemplary representation of electromagnetic
solenoid, in accordance with an embodiment of present disclosure.
[0028] As illustrated, an electromagnetic solenoid 100 can include a
moving electromagnet 102 and a fixed electromagnet 104. An elastic member 106
can be configured between the moving electromagnet 102 and the fixed
electromagnet 104. The elastic member 106 is configured to provide resistance to
the movement of the moving electromagnet towards the fixed electromagnet. The
elastic member can include but not limited to a spring. A solenoid coil 108 can be
configured around the fixed electromagnet 102 and the moving electromagnet
104. An alternate current is configured to pass through the solenoid coil 108 to
generate an electromagnetic force to pull the moving electromagnet 102 towards
the fixed electromagnet 104.
[0029] In an embodiment, a first shading ring 110 can be configured or
grooved in the fixed electromagnet 104. A second shading ring 112 can be
configured or grooved in the moving electromagnet 102. The first shading ring
110 and the second shading ring 112 can be configured such that a resultant
magnetic flux generated by the first shading ring 110 and the second shading ring
112 is equal to a sum of individual magnetic fields generated by the first shading
ring 110 and the second shading ring 112. The first shading ring and the second
shading ring may be made of any of conducive material such as copper, and
aluminium.
[0030] In an embodiment, when the alternate current in the solenoid coil
108 ceases or an electromagnetic magnetic force pulling the moving
electromagnet 102 towards the fixed electromagnet 104 becomes weaker than an

elasticity of spring, the moving coil can be pushed back to its initial position by
the spring 106. A current in the shading ring is ideally 90° out of phase with the
current in the solenoid coil 108. Both shading rings (110, 112) can act as parallel
electric circuit such that total equivalent flux is equal some of the individual
fluxes in the first shading ring 110 and the second shading ring 112.
[0031] In an embodiment, an equal amount of current can be produced in
both shading rings. An amount of current generated can depend on primary number of turns, secondary single turn and cross section area of the shading ring. Shading ring can cause efficient generation of a flux component with an amplitude nearly as large as the flux in the primary coil. Here flux generate in both the shading rings (110, 112) in such a direction that attract to each other. With this phenomenon moving core attracted towards the fixed core with efficient electromagnetic force and avoid humming and chattering noise of armature observed with AC supply.
[0032] Moreover, in interpreting the specification, all terms should be
interpreted in the broadest possible manner consistent with the context. In particular, the terms "comprises" and "comprising" should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refer to at least one of something selected from the group consisting of A, B, C ....and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc.
[0033] While the foregoing describes various embodiments of the
invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0034] The proposed invention provides an electromagnetic solenoid,
which is free from humming and chattering noise of armature observed with AC
supply.
[0035] The proposed invention provides an electromagnetic solenoid,
which is free from excessive heating problem.
[0036] The proposed invention provides an electromagnetic solenoid,
which is cost effective.
[0037] The proposed invention provides an electromagnetic solenoid,
which is easy to use.
WE CLAIM:

An electromagnetic solenoid comprising:
a moving electromagnet;
a fixed electromagnet;
an elastic member configured between the moving electromagnet and the fixed electromagnet, and the elastic member is configured to provide resistance to the movement of the moving electromagnet towards the fixed electromagnet;
a solenoid coil configured around the fixed electromagnet and the moving electromagnet, wherein an alternate current is configured to pass through the solenoid coil to generate an electromagnetic force to pull the moving electromagnet towards the fixed electromagnet;
a first shading ring configured in the fixed electromagnet; and
a second shading ring configured in the moving electromagnet,
wherein the first shading ring and the second shading ring are configured
such that a resultant magnetic flux generated by the first shading ring and
the second shading ring is equal to a sum of individual magnetic fields
generated by the first shading ring and the second shading ring.
The electromagnetic solenoid as claimed in claim 1, wherein when the
alternate current in the solenoid coil ceases, the moving electromagnet is
pushed back to initial position by the elastic member.
The electromagnetic solenoid as claimed in claim 1, wherein the first
shading ring and the second shading ring acts as parallel electric circuit.
The electromagnetic solenoid as claimed in claim 1, wherein the first shading ring and the second shading ring are made of any of copper, and aluminium.