Electrical System Operation - Toro Greensmaster eFlex 1800 Service Manual

Electrical System Operation

Electrical System: Electrical System Operation
The Greensmaster eFlex machines utilize a 53 VDC (nominal) 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 3 fuses that reside in the wire harness fuse block and a single fuse in
the battery pack.
The battery pack allows a single component to be attached to the machine as the
electrical power supply. This pack provides a nominal 53 V (42 V to 64 V @ 100%
state of charge), 35 Ah supply and includes an integrated battery management
system. The battery management system uses CAN communication with the
TEC and battery charger.
A Toro Electronic Controller (TEC) is used on the eFlex machines to manage
the machine electrical functions. The controller is microprocessor controlled that
senses the condition of various switches (inputs) and directs electrical power to
control appropriate machine functions (outputs) based on the inputs.
The electric motor used on the eFlex is a 48 VDC, 1,200 W, brushless, permanent
magnet DC motor. The motor has its own integral controller and helical gear
reduction. The machine TEC provides motor direction with communication via
the CAN-bus system. The motor provides power for the traction drum and cutting
unit when engaged by the operator.
The main contactor exists in the electrical system to connect the battery pack
to the electric motor. The TEC 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 via the CAN-bus system.
The InfoCenter display provides information to the operator during the operation
of the machine, provides electrical system diagnostic assistance for the
technicians, and allows inputs for the adjustable machine settings. The status of
TEC inputs and outputs can be monitored with the InfoCenter display.
The 53 VDC (nominal) system is an isolated system so that the machine frame is
not used for any ground connections on the eFlex machine. A set of connectors
are included on the machine, which can be used to disconnect the machine
wire harness from the battery pack to prevent unexpected machine operation
when performing service.
Note: Information about individual electrical components in the electrical system
is included in Testing the Electrical Components (page
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 communication with
the battery management system. The battery storage wake-up, maintenance
features, and long-term storage discharge function are provided by the charger
to improve overall battery life. Ensure that the charger is connected to the battery
pack whenever the machine is not in use.
Start Process
When the key switch is turned to the S
system goes through a wake-up process. The contactor in the battery pack
should click as it is energized followed by the main contactor being energized
(audible click). Both the TEC and electric motor controller will be initialized. Once
position, the machine electrical
TART
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5–39).
Greensmaster ® eFlex 1800, 2100 and 2120
12189SL Rev E