FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
An apparatus for fixing controller to stator.
APPLICANT (S)
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR (S)
Kamat Praveer, of Crompton Greaves Limited, Fans Division, Plot No. 1, Goa IDC Industrial Estate, Bethora, Ponda, Goa-403409, India; an Indian National
PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

FIELD OF THE INVENTION:
This invention relates to the field of motors and motor assemblies.
Particularly, this invention relates to brushless electric motors (BLDC).
Specifically, this invention relates to an apparatus for fixing controller to stator.
BACKGROUND OF THE INVENTION:
A motor is an electro-mechanical assembly which converts electrical energy to mechanical energy. In a typical DC motor, there are permanent magnets on the outside and a spinning armature on the inside. The permanent magnets are stationary, so they are called the stator. The armature rotates, so it is called the rotor. The armature contains an electromagnet such that when electricity is provided through this electromagnet, it creates a magnetic field in the armature that attracts and repels the magnets in the stator. This spins the armature through 180 degrees. In order to keep it spinning, the poles of the electromagnet have to be changed. The brushes handle this change in polarity. They make contact with two spinning electrodes attached to the armature and flip the magnetic polarity of the electromagnet as it spins.
In a brushless DC motor (BLDC), the permanent magnets are put on the rotor and the electromagnets are moved to the stator. A computer (connected to high-power transistors), is used, to charge up the electromagnets as the shaft turns. This computer or computational means may be a printed circuit board (PCB). These motors operate by electronic commutation of stator windings rather than the

conventional mechanical commutation accomplished by the pressing engagement of brushes against a rotating commutator.
This PCB has lead wires which are to be connected to the stator. The stator, typically, includes a centrally located shaft which allows the entry of wires from the PCB in to the stator. The shaft includes lateral slots for facilitating wire entry and wire location.
This process of guiding the lead wires through the slots and the shaft to the stator is done manually, according to the prior art, thus resulting in a plurality of disadvantages as follows: i. PCB damage due to handling discrepancies; ii. assembly not being uniform due to human error; and iii. inappropriate location of the PCB on the stator.
Thus, there is difficulty in assembling with hands and pulling lead wire is time consuming and may affect quality of the product. This reduces company throughput.
There is a need for an apparatus which alleviates the manual laborious and cumbersome process of fixing.
OBJECTS OF THE INVENTION:
An object of the invention is to provide an apparatus for an improved apparatus for fixing PCB to a stator with its wires through a shaft of the stator.

Another object of the invention is to provide an apparatus which eases the fixing of PCB to a stator with its wires through a shaft of the stator.
Yet another object of the invention is to provide an apparatus for the fixing of PCB to a stator with its wires through a shaft of the stator such that it provides for time saving.
Still another object of the invention is to improve quality and productivity in fixing of PCB to a stator with its wires through a shaft of the stator.
SUMMARY OF THE INVENTION:
According to this invention, there is provided an apparatus for fixing controller to stator, said apparatus comprises:
a. a swiveling fixture adapted to receive a stator, with an orthogonal vertical
shaft, from an operative lower side of said fixture, said fixture having an
open slot on its operative upper side in order to receive a controller assembly
through said shaft; and
b. at least a pair of parallel located columns adapted to support said fixture in a
swinging position;
wherein, said stator, said shaft, said fixture, and said controller assembly are all coaxial to provide balance and uniformity in the fixing process.
Typically, said swiveling fixture is a box fixture.
Preferably, said swiveling fixture is an aluminum based fixture.

Preferably, said clamps are nylon side clips.
Typically, said clamps are operated by means of wing nuts.
Typically, said controller assembly is a PCB assembly.
Typically;, said columns originate on a fixture base which forms a base for the entire apparatus.
Typically, said columns are provided with spring loaded stoppers, laterally located, so that they arrest the swiveling motion of the fixture at a pre-desired swiveled location.
Typically, said fixture includes at least a pair of side clamps located on the operative top of aid fixture, and laterally located, diametrically opposite each other, at the edge of the open slot in the fixture such that said clamps aid in holding the co-located position of the controller assembly with the stator assembly such that the lead wires can be securely fastened through the shaft on to the stator without losing the co-located position of the controller assembly with the stator.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
The invention will now be described in relation to the accompanying drawings, in which:

Figure 1 illustrates an isometric view of an apparatus for fixing controller to stator; and
Figure 2 illustrates a front view of the apparatus of Figure 1.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
According to this invention, there is provided an apparatus for fixing controller to stator.
Figure 1 illustrates an isometric view of an apparatus for fixing controller to stator.
Figure 2 illustrates a front view of the apparatus of Figure 1.
In accordance with an embodiment of this invention, there is provided a fixture (12) which is a box fixture which receives a stator (14). The stator is put into the fixture from an operative lower side of the fixture. There is an open slot on the operative upper side of the fixture which receives the controller assembly (16). The controller assembly is, typically, a PCB assembly. The stator includes a shaft (18) which receives the controller assembly.
In accordance with another embodiment of this invention, there is provided at least a pair of parallel located columns (22) which support the fixture in a swinging position. These columns allow swiveling of the fixture such that the stator can be easily loaded from the operative lower side and can be removed after the fixture if done. These columns originate on a fixture base (24) which forms a base for the entire apparatus. The columns are provided with spring loaded stoppers (26),

laterally located, so that they arrest the swiveling motion of the fixture at a pre-desired swiveled location.
The stator (14), the shaft (18), the fixture (12), and the controller assembly (16) are all co-axial to provide balance and uniformity in the fixing process.
In accordance with yet another embodiment to of this invention, there is provided a pair of side clamps (28) located on the operative top of the fixture (12), and laterally located, diametrically opposite each other, at the edge of the open slot in the fixture. The controller assembly needs to be kept in place on to the stator. The clamps aid in holding the co-located position of the PCB with the stator assembly such that the lead wires can be securely fastened through the shaft on to the stator without losing the co-located position of the PCB with the stator. The clamps may be operated by means of wing nuts (32).
Preferably, the fixture is made of aluminum base and the clamps are nylon side clips.
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim,
1. An apparatus for fixing controller to stator, said apparatus comprising:
a. a swiveling fixture adapted to receive a stator, with an orthogonal vertical
shaft, from an operative lower side of said fixture, said fixture having an
open slot on its operative upper side in order to receive a controller assembly
through said shaft; and
b. at least a pair of parallel located columns adapted to support said fixture in a
swinging position;
wherein, said stator, said shaft, said fixture, and said controller assembly are all co-axial to provide balance and uniformity in the fixing process.
2. An apparatus as claimed in claim 1 wherein, said swiveling fixture is a box fixture.
3. An apparatus as claimed in claim 1 wherein, said swiveling fixture is an aluminum based fixture.
4. An apparatus as claimed in claim 1 wherein, said clamps are nylon side clips.
5. An apparatus as claimed in claim 1 wherein, said clamps are operated by means of wing nuts.
6. An apparatus as claimed in claim 1 wherein, said controller assembly is a PCB assembly.

7. An apparatus as claimed in claim 1 wherein, said columns originate on a fixture base which forms a base for the entire apparatus.
8. An apparatus as claimed in claim 1 wherein, said columns are provided with spring loaded stoppers, laterally located, so that they arrest the swiveling motion of the fixture at a pre-desired swiveled location.
9. An apparatus as claimed in claim 1 wherein, said fixture includes at least a pair of side clamps located on the operative top of aid fixture, and laterally located, diametrically opposite each other, at the edge of the open slot in the fixture such that said clamps aid in holding the co-located position of the controller assembly with the stator assembly such that the lead wires can be securely fastened through the shaft on to the stator without losing the co-located position of the controller assembly with the stator.