Voltage 380V AC Speed Motor JSCC 90YT90GV22 Variable Speed Ac Motor

AC Speed Motor JSCC 90YT90GV22 Adjustable-Speed

1 . Descriptions:

Today, AC motors are extensively employed in various industries due to their versatility and efficiency. As their name suggests, these motors convert electrical energy from an alternating current source into mechanical energy, resulting in shaft rotation.

AC motors provide numerous benefits compared to their direct current counterparts. Unlike DC motors, AC motors do not require brushes or commutators, making them more cost-effective, straightforward, and reliable in generating mechanical energy. However, an ongoing challenge associated with AC motors is achieving precise speed control.

2 . Specifications:

3 . How to control the speed of an AC motor:

An AC motor operates by generating a rotating magnetic field within its coils, which is transmitted to a rotor connected to an output shaft. This rotor, in turn, generates a secondary magnetic field that induces the rotation of the output shaft at a constant speed. The synchronous speed of the motor can be estimated using the formula:

Synchronous speed (in revolutions per minute) = (120 * f) / P

Where:
f = Incoming line frequency
P = Number of poles in the motor

For instance, in the United States, where the incoming line frequency is typically 60 Hz at 120 V, an AC motor with two poles (a pole pair motor) would have a synchronous speed of 3600 revolutions per minute. In practice, however, the motor operates at a speed lower than 3600 rpm, and the difference in speed (usually expressed as a percentage) is known as the slip.

If there is a requirement to achieve lower output speeds using the same motor, engineers need to control the incoming line frequency since the number of poles in a typical AC motor remains constant. This speed control can be achieved using a variable frequency drive (VFD), which enables engineers to adjust the frequency of the power supply to the motor.

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