B13 BETTER (B13 BEST APPEARANCE) WASHING MACHINE SERVICE HANDBOOK
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9.10.2. Atlas Motor
Figure 9.17 Motor (Atlas motor ve motor kartı)(discrete)
Brushless motor is used. Motor stator consists of 3-phase coil and magnets are on the rotor.
Rotor position is detected from askoll-type hall sensor, stator windings are enegized with the
help of an inverter. In Atlas version,
Rotor position is detected without using hall sensor and stator windings are enegized with the
help of an inverter.
Along with the main board, there is an askoll-type motor driver card integrated on the motor.
However, motor card is discrete in Atlas type. While the motor and the motor card can give
service separately in Atlas type, service can be given in groups in the Askoll type as the
motor and the motor card are integrated. Motor speed is provided through communication of
the motor card and the main board with each other. Main board is the prevailing unit; what
the motor reference speed will be is determined by the main board.
However, all other control algorithms required for motor drive are realized by the motor driver
card. While the motor speed measurement is performed with the help of hall sensor in askoll
type, speed is detected thanks to software in atlas type without using an additional sensor.
Under abbnormal conditions (such as permanently locked rotor), thermic element is used to
protect the motor from overheating. Also, locked rotor condition is detected by the software to
ensure protection.
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