FIELD OF THE INVENTION
Improvement in Torquer Scale factor by increasing the number of turn more
than 416 in torquer motor coil.
BACKGROUND OF THE INVENTION
Torquer assemblies are used in dynamically tuned gyroscope apparatus to
provide a restoring torque on the gyroscope inertia ring, the restoring torque
necessary to maintain the ring in a datum position being a measure of the
rate of displacement of the gyroscope.
For better restoring torque it is necessary to increase number of turn of
torquer coil within limited space. However, challenge was to maintain the
same tolerance levels of resistance and produce coils of same maximum
width and height of existing torquer coil (with less than 400 turns) which is
very difficult to achieve.
SUMMARY OF PRESENT INVENTION
The invention is more particularly concerned with electromagnetic torquer
assemblies for dynamically‐tuned gyroscopes. The torquer has four fixed
electrical coils equally spaced outwardly of the inertia ring around a portion
of the gyroscope casing, of a magnetic material. The coils are arranged, when
energized, to produce radial magnetic fields which interact with the fields
produced by the permanent magnets and thereby apply a restoring torque to
the inertia ring. The permanent magnets are spaced from one another such
that the torque produced by the interaction of the magnets with the casing is
minimum.
Increasing the number of turn more than 416 in torquer motor coils
assembly in gyroscope helps in achieving better restoring torque on flywheel
and quickly stabilized flywheel in datum position.
Annexure‐II
BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the present invention will become more
apparent and descriptive in the description when considered together with
figures/flow charts presented:
Fig. 1 is Cross section view of dynamically tuned Gyroscope.
Fig. 2 is schematic diagram of gyro Rotor assembly.
Fig. 3 is a Front view of Torquer motor coil assembly.
Fig. 4 is a cross section view of Winding tool.
Fig. 5 is a front view of flat Torquer coil
DETAILED DESCRIPTION
The details of torquer system are shown in fig 2 the magnets are fixed on the
wheel and the torquer coils are mounted on gyro case.
Torquer coil: One number of Torquer coil assembly is used in each Gyro
motor as shown in fig 1. Torquer coil assembly consists of four coils
mounted on support with glue Ecobond 104 A+B as shown in fig 3.
Flat elliptical torquer coil is made with help of winding tool as shown in fig
4.
Detail dimension and resistance of flat torquer coil more than 416 turn is
given bellow as shown in fig 5:
1) Maximum height of coil = 7.4mm
2) Maximum Width of coil = 1.45 mm
3) Maximum length of coil = 16 mm
4) Maximum Resistance with coil at 20°C =33 Ω
After fabrication of flat torquer coils it is bended to cylindrical shape by
use of bending tool and four bended coils mounted on support two coil in
x axis and two coil in y axis with glue as shown in fig 3.
Torquer motor coil is responsible for aligning the Gyro wheel to its
stabilised position by utilizing the feedback received from pick‐off coil.
Annexure‐II
For aligning the Gyro wheel to its stabilised position necessary current
proportional to the angular deviation of casing w.r.t Gyro wheel flows to
torquer coil which produce a magnetic field which interact with the fields
produced by the permanent magnets and thereby apply a restoring torque
to the inertia wheel.

WE CLAIMS:-
Accordingly, the description of the present invention is to be considered as illustrative only and is for the purpose of teaching those skilled in the art of the best mode of carrying out the invention. The details may be varied substantially without departing from the spirit of the invention, and exclusive use of all modifications which are within the scope of the appended claims is reserved. We Claim

1. The present invention comprising:
- Atleast one torquer motor coil made of copper,
- A torquer coil support for mounting the coil

2. The system further using a winding arrangement tools comprising an arrangement for fitment on winding machine, a suitable groove for winding of coil with suitable pin type arrangement for remove of winded coil as shown in Fig 4.

3. The system as per claim 1 wherein, increasing the number of turns from less than 400 turns to more than 416 turns in torquer motor coils assembly provides better restoring torque on flywheel.

4. The system as per claim 1 wherein, the torquer motor coil having more than 416 turns within maximum dimension of L= 16 mm, W =1.45mm and H= 7.4 mm as per fig no 5.

5. The system as per claim 1 wherein, the torquer motor coil with dimension given in claim 2 having maximum resistance at 20degC of atmost 33ohm.

6. The system as per claim 1 wherein, the torquer motor coil using layer by layer winding of copper wire diameter less than 100 micron.

7. The system as per claim 1 wherein, the torquer motor coil winding using a suitable machine with traverse resolution as low as 10 microns; using a designed winding tool. ,TagSPECI:As per Annexure-II