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Greensmaster eFlex 1800/2100Page 4 -- 4Electrical System
Electrical System Operation
Greensmaster eFlex machines utilize a 53 VDC (nomi-
nal) lithium ion battery pack to supply electrical power to
the Toro electronic controller (TEC), an electric motor
and a main contactor. Circuit protection for this 53 VDC
(nominal) system includes two (2) fuses that reside in
the wire harness fuse block and a single fuse in the bat-
tery pack.
The battery pack allows a single component to be at-
tached to the machine as the electrical power supply.
This pack provides a nominal 53 volt (42V to 64V @
100% state of charge), 35 Amp--hour supply and in-
cludes an integrated battery management system. The
battery management system uses CAN communication
with the TEC controller and battery charger.
A Toro Electronic Controller (TEC) is used on eFlex ma-
chines to manage machine electrical functions. The
controller is microprocessor controlled that senses the
conditionof various switches (inputs) and directs electri-
cal power to control appropriate machine functions (out-
puts) based on the inputs.
The electric motor used on the eFlex is a 48 VDC, 1200
watt, brushless, permanent magnet DC motor. The mo-
tor has its own integral controller and helical gear reduc-
tion. The machine TEC controller provides motor
direction with communication via the CAN--bus system.
The motor provides power for the traction drum and cut-
ting unit when engaged by the operator.
The main contactor existsintheelectricalsystem to con-
nect the battery pack to the electric motor. The TEC con-
troller determines when the main contactor should be
engaged.
Control for the components in the electrical system is
handled by integral controllers in the battery pack and
electric motor along with direction from the machine
TEC controller via the CAN--bus system.
The InfoCenter Display provides information for the ma-
chine operator during machine operation, provideselec-
trical system diagnostic assistance for technicians and
allows inputs for adjustable machine settings. The sta-
tus of TEC controller inputs and outputs can be moni-
tored with the InfoCenter display.
The 53 VDC (nominal) system is an isolated system so
the vehicleframe isnot used for any ground connections
on the eFlex machine. A set of connectors are included
onthemachinewhichcanbe used to disconnect the ma-
chine wire harness from the battery pack to prevent un-
expected machine operation when performing service.
NOTE: Information about individual electrical compo-
nents in the electrical system is included in the Compo-
nent Testing section of this chapter.
Battery Charging
The eFlex lithium ion battery pack requires regular
charging that is provided by the lithium battery pack
charger (included with the machine). The output voltage
and current of the charger are controlled with CAN com-
munication with the battery management system. Bat-
tery storage wake--up, maintenance features and long
term storage discharge function are provided by the
charger to improve overall battery life. It is strongly rec-
ommended that the charger be connected to the battery
pack whenever the machine is not in use.
Start Process
When the key switch is rotated to the START position,
the machine electrical system goes through a wake--up
process. The contactor in the battery pack should click
as it is energized f ollowed by the main contactor being
energized (audible click). Both the TEC controller and
the electric motor controller will be initialized. Once the
InfoCenter Display comes on--line, the key switch can
be released to the RUN position and the machine will be
ready for operation.
Run Process
Pushing the traction engagement lever forward is used
to close the traction switch. This closed switch is used
as an input by the TEC controller which communicates
to the electric motor to engage. Motor rotation speed
and thus traction speed is determined by the speed con-
trol setting that is adjusted by the operator. Actual motor
speed is monitored by the TEC and motor controllers so
that as traction load changes (e.g. moving up or down
an incline) the motor can compensate as needed.
Engaging the cutting reel with the engagement lever
closes both the traction and reel engage switches. The
electric motor will be engaged with control of motor
speed handled by the TEC and motor controllers based
on operator speed setting and load on the machine.
The EZ turn feature of an eFlex machine is available
when the the cutting reel is engaged and the EZ turn
switch on the console is in the ON position. When turn-
ingthemachinewithEZturnengaged,theground
speed will be reduced as the cutting unit is raised from
the ground. Speed will increase as the cutting unit is low-
ered back to the turf after turning has been completed.
The EZ turn feature is not active when the machine is in
transport position.