Miele W 1119 Technical Information download pdf (Page 45)

Technical Information

W1113, W1119, W1203, W1213 & W1215 Clothes Washers

1 Technical Data

Main Motor: DC variable speed (see 2.1 for details on control)

2 Function

2.1 Motor Control

UB Operating voltage

UM Motor voltage

T 1 period, frequency approx. 20 kHz

ti Power on

tp Power off

t Time

Figure 060-1: Pulse width modulation motor speed control

A bridge rectifier circuit on the power electronic provides the DC

voltage supply for the motor. Pulse Width Modulation (PWM)

circuitry controls the DC voltage by varying the duration of power

(on / off in pulses) provided to the motor.

The proportion of ti (DC pulse on) and tp (DC pulse off) controls

the motor speed. A tachogenerator (on the motor) monitors the

speed of the motor.

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Miele W 1119 Technical Information Page 45