This page introduces some applications to small precision motors, white goods, industrial equipment.
Asahi Kasei Microdevices products contribute to higher precision, longer service life, and smaller and thinner size of various equipment, as well as to better design and easier handling.

Small precision motor

In order to improve the precision of a DC motor and prolong its service life, a Hall motor (brushless motor) is equipped with a Hall sensor instead of a brush and commutator. The Hall sensor is used to detect a position of the rotor magnet. The Hall motor is used in various equipment today.

For the first instance, a personal computer. The applications are the optical disk drive, FDD spindle motor, and CPU cooler fan motor used in personal computers. Then, the main motor (paper feed or drum rotation) and polygon mirror motor in a printer and copying machine.
The vibration motor in a cellular phone is also equipped with a micro Hall sensor.
For AV equipment, the spindle motor in a DVD equipment and video game machine, the capstan motor in a VTR and DVC, and the electronic circuit cooling fan motor in a PDP and large screen LCD television.
The Hall sensor is also used as a pulse encoder in addition to as a normal rotor position detector of the capstan motor in a VTR.

>> Products > Hall element > Line-up > HW series

White goods

For white goods, the Hall sensor is used in various applications.

For refrigerators, the Hall sensor is used as a door switch (for main door and drawing doors), contributing to longer service life and uncluttered design.
The Hall sensor is also used as a position sensor for the ice machine, and in the inside fan motor.
For washing machines, the Hall sensor is used in the open/close switch on the lid, the main motor, and pump motor.
For water heaters, many Hall sensors are utilized as a water flow sensor and cold/hot switching valve position sensor, and in the combustion fan motor.
For dehumidifiers, the Hall sensor is used as a water level sensor on the water tank.
Most of air conditioning fan motors (indoor and outdoor machines) are Hall motors.

>> Application Note > Open/close switch
>> Products > Hall effect IC

Industrial equipment

Various kinds of devices for encoder applications are provided, ranging from the field requiring very high precision to the field requiring handiness.