What is a coreless motor?? #CorelessMotor #TechnicalDocumentation
What exactly is a coreless motor? I will explain it briefly. I will discuss the differences in appearance, the operating principles, as well as the advantages and disadvantages.
This is a technical information that explains coreless motors in simple terms. A coreless motor is a motor that does not have an iron core, which makes it compact and lightweight. Products manufactured with coreless motors include vibration motors for mobile phones and linear motors that control the autofocus function in smartphones. It may not be an exaggeration to say that we are constantly relying on coreless motors without even realizing it. Devices like earphones and speakers are also referred to as voice coil type coreless motors, so I believe coreless motors are present in many aspects of our lives. However, core motors are overwhelmingly more manufactured and used, and more than 95% of motors in the world are likely core motors. The reason for this is that while coreless motors are suitable for ultra-precision applications, they are said to be unsuitable for high-power applications. We are developing and manufacturing coreless motors that overturn the common understanding of typical coreless motors.
basic information
According to Wikipedia, A coreless motor (also known as a coreless electric motor) is a type of permanent magnet field winding commutator motor that features a cup-shaped armature solidified only with resin and incorporates permanent magnets for the field. As the name suggests, it lacks a core (iron core), which theoretically eliminates iron losses that would occur. However, this makes it difficult to generate large torque. In recent years, the emergence of powerful neodymium magnets has led to the development of various types of coreless motors, but currently, only small-sized models have been put into practical use. Features: - The mass of the armature is light, and the mechanical time constant is small (suitable for rapid acceleration and deceleration due to low inertial mass). - The inductance of the winding is low, resulting in minimal sparking during rectification. - Cogging-free. - Capable of achieving high efficiency.
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Applications/Examples of results
- Autofocus linear motor - Mobile phone vibration motor - Drive motor for high-end model trains - Servo motor for remote control and robots - Earphones - Speaker - Linear motor
