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SPEED CONTROL
The speed control board is mounted to the bottom plate of the washer in the left rear corner of the
washer. The speed control board controls the following operations:
Note: The control board is mounted in the console. The
speed control board is mounted in the left rear corner of
the washer.
1. The speed of the drive motor by converting input line to
neutral single phase 60 Hertz voltage, to a varying
frequency, three phase output voltage from zero to 300
VAC. By varying the amount, frequency, and polarity of the
voltage and comparing the input from the tachogenerator on
the drive motor, the speed control board can operate the
drive motor at a preprogrammed speed and direction.
2. The balance of the load in the washer during the spin
cycle by converting the sine wave from the tachogenerator
to square waves and comparing the distance between the
square waves.
The motor
is an induction, three phase AC motor that varies
speeds when the voltage from the speed control board
varies in frequency and amount. The motor has a
tachogenerator that inputs the speed of the motor to the
speed control board.
mabe CONFIDENTIAL AND PROPRIETARY INFORMATION-NOT FOR PUBLIC DISCLOSURE. July 2006