“Panasonic Corporation announced today that it has developed an angle sensor called “A³MR” that precisely detects the rotation angle of vehicular motors. This is a small and highly accurate sensor with built-in AMR thin films and Hall elements. The AMR thin films respond to a wide range of strong magnetic fields and the Hall elements are able to detect angles of up to 360°. The sensor meets the requirements of ISO 26262 (functional safety requirements) for sensors incorporated into vehicles. This newly-developed sensor reads the angle of rotation (rotational angle) of the rotor in the motor to a high degree of precision. This enables accurate detection of the motor’s movement, allowing efficient control of the motor’s rotational speed and driving amount to achieve more efficient control. The sensor is small and light and is capable of precise detection even in irregular magnetic fields. This characteristic allows side shaft detection, which greatly increases the options for sensor attachment. In an Advanced Driver Assistance System (ADAS), for example, the rotation of the power steering or operation of the gearshift exerts control over the behavior of the vehicle through changes in the rotational angle of the motor. Controlling the motor in such a highly precise manner causes the vehicle to travel with precision and puts the driving motor included in an ISG hybrid system under close control. This prevents the motor from running erratically, thus achieving lower fuel consumption by improving its efficiency.”
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