HYSTERESIS MOTOR Meaning and
Definition
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A hysteresis motor is an electrical motor that operates based on the principles of hysteresis, which refers to the phenomenon of lagging behind or a delay in response. It is a type of synchronous motor that utilizes the hysteresis effect to generate rotation.
The hysteresis motor comprises a rotor made of a material with high magnetic hysteresis, commonly a material such as cobalt steel or chromium steel. When an alternating current (AC) is supplied to the motor, the flux in the iron core of the motor gets magnetized. The rotor, due to its hysteresis properties, exhibits a delay in magnetic response to the changing magnetic field, resulting in a rotational movement.
One of the key advantages of a hysteresis motor is its ability to provide constant speed and start reliably without the need for external devices like capacitors or centrifugal switches. This makes it particularly suitable for applications requiring precise speed control and constant torque, such as turntables, record players, and tape recorders.
However, hysteresis motors can have relatively low torque compared to other motor types, limiting their use in applications requiring high torque. They are also known to have lower efficiency due to the energy loss caused by hysteresis. Nevertheless, their simplicity, low maintenance requirements, and ability to operate at constant speed make hysteresis motors a popular choice for certain devices where accuracy and stability are crucial.
Etymology of HYSTERESIS MOTOR
The term "hysteresis motor" is derived from two main components: "hysteresis" and "motor".
1. Hysteresis: The word "hysteresis" comes from the Greek words "husterēsis", meaning "deficiency" or "lagging behind". Hysteresis refers to the phenomenon in which the response of a system depends not only on the present conditions but also on its past history. It is commonly used in physics and engineering to describe lagging effects or delays in the response of a system to changes in input or conditions.
2. Motor: The term "motor" comes from the Latin word "mōtor", meaning "mover" or "driver". It refers to a device or machine that converts electrical or other forms of energy into mechanical energy, resulting in motion.
