Cranfield University, Silsoe Chapter 3
Yuriko Ozaki (1999) 16
3. Development of Hardware
3.1 Motors and Gearboxes
3.1.1 Motors
Two motors are used to drive the sprinkler head trajectory and sector angle. One of them (RS
stock No.440-442) takes charge of trajectory and the other (No.332-082) of sector.
These are 4-phase hybrid motors and their main specifications are shown in Table.3-1. The
further details can be referred to RS data sheet No.232-5745.
RS Stock No. 440-442 332-082
Step angle 1.8 1.8
Nominal phase parameters and
rating: Voltage
5.1 5
Resistance at 20°C
5 5
Current (A) 1 1
Holding torque (mNm) 500 460
Table 3-1: Main features of motors
The configurations of the motors are shown in Fig.3-1.
Fig.3-1: The configurations of motors.
Furthermore, Fig.3-3 in next section shows the electric circuit of the motor connections to the
motor driver boards and the power supply.
Black
White
Orange
White
Red
White
Yellow
White
Black White
Black
Red/White
Black/White
Red 1 2 3 4
Red
Red/White
Black
Black/White
Yellow/White
Yellow
Green
Green/White
Motor1
RS No.440-442
Motor2
RS No.332-082
1 2 3 4
