Nilfisk-Advance BR 1100S Service Manual

Also see for 56413006: Instructions for use Instructions for use - original instructions

Contents

Nilfisk-Advance BR 1100S Service Manual Manual pdf 40 page image

38 - FORM NO. 56043122 - BR 1100S, 1300S6 - WHEEL DRIVE SYSTEM16 15 14 13 12 11 10 98 7 6 5 4 3 2 1AUXILIARYMOTIONDRIVERFAULT1THROTTLECONTROLWIPERMAINCONTACTORDRIVERMODE 1SELECTINTERLOCKDetail of A1 16-pin connector, as shown in Figure 6.1Used (11 Pins)Not Used (5 Pins)KEY SWITCHINPUT (KSI)MODE 2SELECTAUXILIARYDIRECTIONDRIVERPOT LOW POT HIGHGENERAL FUNCTIONAL OVERVIEWA 1.75 HP separately excited (field & armature) 36V DC motor/gear/wheel unit (M1) is used to propel the machine. A Curtis model 1243 PMC solid state speedcontroller (A1) regulates (outputs) the variable speed Fwd/Rev wheel drive motor functions. The controller unit is located to the left of the operator seat, behind theelectrical access panel. The electrical potentiometer R1 mounted to the operator foot pedal inputs to the (A1) controller the machine operator’s specific speed anddirection demands.DRIVE MOTOR SYSTEM CONTROLLER FUNCTION OVERVIEWSee Figure 6.1. To make the A1 speed controller’s internal circuits operational (power it up) the two switches S1, main power and S2 charger interlock must beclosed. Next the seat switch S3 must be depressed for the main contactor K7 to be energized. Depressing the foot pedal in either Fwd or Rev will move the R1potentiometer and provide the needed direction and 0-5V throttle input signals for controller output. These controller inputs direction and voltage then energize theinternal transistors which selects the motor polarity and also at the same time manages the current and voltage output values to the two separate motor circuits(armature & field) per the percentage of the R1 throttle movement.MOTOR OPERATIONThe motor has (4) terminal connections, (2) armature A1, A2 and (2) field F1, F2. The motor armature circuit receives from the controller a chopped on time off time*PWM voltage and current output that varies the motor speed. The field circuit sees the current direction polarity change that effects the rotation of the motor CWfor FWD and CCW for REV.DRIVE WHEEL SYSTEM SPEEDSThe speed controller is programmed for two maximum speed setting modes, M1max and M2max. The M1max is the transport speed mode and is set at 100% of thetotal systems speed potential. The M2max is the scrubbing speed mode and is set at 70% of the total system’s speed potential. Note: Both of the speed settings(M1 & M2) can be changed (increased or decreased) from the original factory specifications only by using the hand held programmer PN 56409441. See in theElectrical System of this manual instructions for using the programmer for speed setting changes and troubleshooting diagnostics.*PWM; pulse width modulation, also called “chopping” is a technique that switches battery voltage to the motor ON and OFF very quickly, thereby controlling thespeed of the motor.