FES Maintenance manual, v1.16 May 2020
Page 6 of 24
3.2 Description of main FES components
3.2.1 Electric motor
The FES system uses an outrunner type motor with brushless synchronous
permanent magnet and an electronically controlled 3 phase commutation system. The
rotor position is measured using three hall sensors, with an additional fourth hall sensor
used for automatic propeller positioning.
This motor can work only in combination with a suitable electronic motor controller.
It transforms the direct current supplied by the battery packs into a 3phase current
required by the motor.
The following table contains the electrical motor power ratings (type:
FES-LAK-M100)
with 116 V on the motor controller and loaded with a propeller (type: FES-LAK-P10-100):
FES MOTOR
Maximum torque
75 Nm
Maximum current
200 A
Maximum Voltage
180 V
Motor velocity constant
45 RPM/V
RPM without load (116V DC on the controller)
5300 RPM
Motor current without load at 5300 RPM
16 -18 A
Max. RPM with FES-LAK-P10-100 propeller (1m diameter)
4500
–
4700 RPM
Battery current loaded (4500 rpm, 116V) with FES-LAK-P10-100
up to 200 A
Rotor rink diameter
177 mm
Motor length
100 mm
Motor weight
cca. 7,3 kg
Motor efficiency
82
–
95 %
Maximum allowed temperature
90 °C
Minimum allowed starting temperature
-
20 °C
Please refer to the FES Motor manual for a detailed description.
