Toro Greensmaster eTriFlex 3360 Service Manual page 111

48 VDC System Operation
Greensmaster® eTriFlex 3360 and 3370
19239SL Rev A
The eTriFlex 48 VDC system includes a 48 VDC battery pack, an engine driven
starter/generator (model 04580), two front traction motors, a steering input device
and a steering motor, three cutting unit lift/lower actuators, three cutting unit
motors, a main contactor and a traction motor contactor. An optional rear wheel
traction motor and an LED light kit that runs on 48 VDC are also available. Circuit
protection for the 48 VDC system includes fourteen fuses in a variety of styles
and locations. The 48 VDC system is an isolated system; each component has a
separate wire leading to a ground bus located on the left side of the machine.
On model 04580 machines, the battery pack is composed of four 12 VDC sealed
batteries connected in series to achieve the necessary 48 VDC system voltage.
The batteries are maintenance free AGM, valve regulated lead acid batteries.
On model 04590 machines, the battery pack is composed of eight 48 VDC
battery assemblies connected in parallel and managed by a separate battery
controller. The batteries are maintenance free Lithium-Ion batteries.
When connecting the individual batteries in the battery pack of the
48 VDC system, make sure that battery polarity is correct. System
damage can occur if the individual batteries are not connected
correctly.
The starter/generator is a 48 VDC, air cooled, brushless, permanent magnet
device. The starter/generator has its own internal inverter and on-board
controller. The InfoCenter Display can be used to monitor starter/generator
activity during machine operation.
The two front traction motors are brushless permanent magnet motors. The
motor controllers are separate from the motors and control each motor
individually (RH controller controls RH motor and LH controller controls LH
motor). The optional rear traction motor is a brushless, permanent magnet motor
with its own on-board controller. The InfoCenter Display can be used to monitor
the current draw for the traction motors during machine operation.
The steering motor is a brushless permanent magnet motor with its own on-board
controller and integrated planetary gear box. The InfoCenter Display can be
used to monitor the position of the steering motor during machine operation.
The three cutting unit lift/lower actuators are CAN controlled electric linear
actuators with an integrated controller, brushless motor, and brake.
The three cutting unit motors are identical brushless, permanent magnet motors
with an internal gear reduction feature. Each motor has its own on-board
controller. The InfoCenter Display can be used to monitor the speed and current
draw for the cutting unit motors during machine operation.
The main contactor exists in the 48 VDC system to connect the 48V battery pack
with the starter/generator, and the cutting unit motor and optional rear traction
motor controllers. The starter/generator controller determines when the main
contactor is engaged.
The traction motor contactor exists in the 48 VDC system to connect the 48 VDC
system with the 2 front traction motors. The controller for the right side traction
motor determines when the traction motor contactor is engaged.
Control for the components in the 48 VDC system is handled by the Precharge
controller (T6: Precharge – model 04590), the battery controller (SC8: Battery
– model 04590), and controllers in the starter/generator (T6: Starter/Generator
IMPORTANT
Page 5–13 Electrical System: Electrical System Operation