The invention relates to design a panel for the Bearing Test Rig. This invention
involves AC Drive system, AC Motor and control logics. The purpose of the
panel is to drive job on the Bearing Test Rig with AC motor and it consist of
double lubrication system.
BACKGROUND OF THE INVENTION
The Bearing Test Rig test the alignment and with standing capacity of bearings.
The Bearing Test Rig requires infinitely variable speed control to maintain the
test speed of the product. Lubrication oil system is mandatory to test the
product. Increase in oil temperature of lubrication will be recorded for
reference. During testing lubrication failure occurred which alternatively leads
to delaying the process. To overcome this difficulty a panel of double
lubrication motors with pumps are designed.
OBJECTS OF THE INVENTION
• An object of invention is to design a Bearing Test Rig with two motor
lubrication system.
• Another object of invention is to design control logics for the Bearing Test
Rig.
• A further object of invention is to design a new panel to drive AC motor.

SUMMARY OF THE INVENTION
Accordingly, a panel has been designed, interfacing with panel to Motor is
wired and control logics. The safety of the machine operation is ensured by
simulating and checking the logic.
Following operations are included in the operator panel,
• Motor running with 0 to max speed by adjusting the potentiometer
• Automatic Braking operations
• Double Lubrication pump controls
• Emergency Stop
The logics are done with relays and contactors. New wiring is done with proper
identification and numbering. Forward/Reverse Operations of the Motor has
been designed with relay logics.
Following Indication lamps are provided for operator,
• Mains ON
• Converter Ready
• Motor Running
• Converter Fault
• Forward Run
• Reverse Run
Following Sequence of logics were designed for implementation,
• Ensure water chiller running
• Ensure Oil pumps running

• Ensure Drive control ON
• Ensure Motor running for test of the job by varying speed through
potentiometer.
The motor has been fixed and aligned. Trial operations were conducted, and
continuous run test has been done. Load test has been conducted before
regular operation of the machine.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
Fig 1 shows power circuit diagram of Oil pump 1, Oil pump 2, Water cooler and
Water pump.
Fig 2 shows transformer connections, Panel AC connection, Voltmeter
Connection and Ammeter Connection.
Fig 3 shows Control Circuit Diagram.
Fig.4show is newly designed Electrical Diagram given here for reference. The
wiring and interface has been done as per the given diagram.
Fig. 5 shows over all view of the Bearing Test Rig Machine in accordance to the
invention
Fig.6 shows newly built Electrical Panel in accordance to the invention.
Fig.7 shows newly built Operator Panel in accordance to the invention.
Fig.8 shows main Motor in accordance to the invention.
Fig.9 shows water Chiller in accordance to the invention.
Fig. 10 shows double Motor Lubrication System in accordance to the invention.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
The overall machine is shown in Fig.5 have VFD Panel (1), Main Motor (2) and
Mechanical Load Cell and rotating system (3). A new wiring diagram is
designed as given in drawings Fig.1, Fig.2, Fig.3 and Fig.4. After design of
schematic diagram, the panel in Fig.6 and equipment’s were identified.
Mounting dimensions of motor were checked. Motor (2) is fixed with proper
alignment. The AC VFD Drive is fixed in the panel. Contactor and relays are
fixed in the panel as per standards. The panel Fig.6 have Operator controls (4),
Panel Air Conditioner (5), Instrument indicators (6) and VFD Panel (1). The
Lubrication system shown in Fig.10 have Lubrication motor 1 (7), Lubrication
motor 2 (8) and Fig.9 shows water cooler unit (9).
Internal wiring is done with proper capacity of wires. External interface wiring
also has been done with existing panel and motor. Interfacing of Two motor
lubrication system is also wired.
Panel powered up and checked for basic startup.
Drive parameter has been entered and tuning has been done.
Load test and trial operations are carried out. Machine handed over to
production.
The control Circuit is designed in such a way that, First the water pump will be
powered, then any one of the Lub oil pump will be started. In continuation
Main motor will be powered up normal operations. During the testing of JOB if
any problem in the Lub Oil motor in running condition the other Lub Oil motor
can be powered up immediately. The Oil pump 2 is kept as backup for Oil

pump 1 and vice versa. Otherwise the whole product testing should be
repeated on the failure of a Oil Pump.
ADVANTAGES
1) Reduces the Mean Time to Repair (MTTR) of the Machine.
2) Increases Mean Time Between Failure (MTBF) of the machine.
3) Increases the availability of the machine.
4) Easy to Maintain and improves the Spares Available for Repair.

WE CLAIM
1) A modified panel with AC drive and AC motor for bearing test rig
comprising of a VFD panel (1), main motor (2), mechanical load cell and
rotating system (3), operator controls (4), panel air conditioner (5),
instrument indicator (6), plurality of lubrication motor, water cooler unit
(9) in which the water pump is powered to initialize a first lub pump oil
which is coupled to a second lub pump oil.
2) A modified panel with AC drive and AC motor for bearing test rig as
claimed in claim 1, wherein the second lub pump oil provides oil incase
of failure.
3) A modified panel with AC drive and AC motor for bearing test rig is as
claimed in claim 1 wherein it is as illustrated and explained in the
accompanying drawings.