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ATLET SERVICE MANUAL A-ERGOATLET SERVICE MANUAL A-ERGO
SMA-Ergo_05_2004A.fmSMA-Ergo_05_2004A.fm
Edition 2004AEdition 2004A
5 5 Drive Drive unitunit
Design and functionDesign and function
IntroductionIntroduction
The drive unit is The drive unit is mounted in an assembly containing the brake, drive motor, gearbox andmounted in an assembly containing the brake, drive motor, gearbox and
drive wheel. The steering servo motor is mounted on the same motor bed.drive wheel. The steering servo motor is mounted on the same motor bed.
For technical data regarding component parts, see section 1.For technical data regarding component parts, see section 1.
Drive motorDrive motor
The drive motor on A-ERGO The drive motor on A-ERGO is a brushless three-phase induction motoris a brushless three-phase induction motor. A pulse sensor. A pulse sensor
is enclosed in the is enclosed in the bearing on the non-driving end of bearing on the non-driving end of the motor, which provides speedthe motor, which provides speed
feedback to the drive rfeedback to the drive regulatoregulator, see section 10., see section 10.
The motor is mounted directly on the gearbox and the The motor is mounted directly on the gearbox and the power transmission takes place viapower transmission takes place via
a gear wheel individually adapted to a gear wheel individually adapted to each gearbox.each gearbox.
GearboxGearbox
The gearbox is adapted to provide the best gear ratio over the speed range of the driveThe gearbox is adapted to provide the best gear ratio over the speed range of the drive
motor.motor.
The drive motor and drive wheel are mounted on the gearbox.The drive motor and drive wheel are mounted on the gearbox.
The gearbox is mounted on the truck chassis. A gear ring bearing is mounted on theThe gearbox is mounted on the truck chassis. A gear ring bearing is mounted on the
gearbox. The steering servo motor drives the gear rgearbox. The steering servo motor drives the gear ring bearing and in this way ing bearing and in this way turns theturns the
gearbox and drive wheel in the required direction when the truck is steered.gearbox and drive wheel in the required direction when the truck is steered.
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