Electrical systems – 5000 Part numbers T-code 497
Valid from serial number 723984-
Date 2005-11-04
Order number 222996-040
13.7 Part numbers A
• Press S18 and turn S17 to on at the same time. • Press S18 until you read Pn= partnumbers.
E
D
C
• You have now choosen Pn= part numbers the symbol “D” on display will be highlighted to indicate what’s currently shown on display. In the start the Pn = part number complete unit will be shown.
B
• By scrolling with the L1 you can get the following information: • SPn= Software part number. • HPn= Hardware part number. • HSn= Hardware serial number.
13.8 Transistor panel
STATUS
B+
A1
M
MODEL
VOLTAGE
SERIAL
CURRENT
M-
13.8.1 General
A2
Curtis 1243 is a regulator for controlling shunt motors. Varying the voltage applied through the armature primarily controls the speed. The voltage is varied through use of pulse-width modulation (PWM). This involves varying the “on” time of the MOS-FET transistors regulating the armature current. Switching of the rotational direction is achieved by switching the polarity on the field winding (S1-S2). The regulator is fitted with a four-quadrant transistor bridge for the field winding and a single-quadrant transistor bridge for the armature winding.
S1
13- 46
S2
Service Manual
7PLL24
© TIEE SARL
