What is the purpose of a shaded-pole induction motor?
1 Answer
A shaded-pole induction motor is a type of single-phase electric motor commonly used for small, low-power applications such as fans, small pumps, and other light-duty applications. Its primary purpose is to provide a simple and cost-effective solution for producing a rotating magnetic field without the need for complex starting mechanisms or external devices.
The shaded-pole motor derives its name from its construction, which includes a shading coil or copper loop (shading coil or shading ring) that's placed on a portion of each pole in the motor's stator. This shading coil is responsible for creating a phase difference between the magnetic flux on the shaded side of the pole and the unshaded side. As a result of this phase difference, a rotating magnetic field is produced, which induces a starting torque and causes the motor to begin its rotation.
However, the starting torque generated by a shaded-pole motor is relatively low compared to other types of motors, and the efficiency is also lower. Therefore, these motors are most suitable for applications where high starting torque and efficiency are not critical requirements. Additionally, shaded-pole motors are simple in construction and relatively inexpensive to manufacture, making them a popular choice for small appliances where cost is a significant factor.
In summary, the purpose of a shaded-pole induction motor is to provide a basic and economical solution for driving small mechanical loads in applications that don't demand high starting torque or efficiency.
The shaded-pole motor derives its name from its construction, which includes a shading coil or copper loop (shading coil or shading ring) that's placed on a portion of each pole in the motor's stator. This shading coil is responsible for creating a phase difference between the magnetic flux on the shaded side of the pole and the unshaded side. As a result of this phase difference, a rotating magnetic field is produced, which induces a starting torque and causes the motor to begin its rotation.
However, the starting torque generated by a shaded-pole motor is relatively low compared to other types of motors, and the efficiency is also lower. Therefore, these motors are most suitable for applications where high starting torque and efficiency are not critical requirements. Additionally, shaded-pole motors are simple in construction and relatively inexpensive to manufacture, making them a popular choice for small appliances where cost is a significant factor.
In summary, the purpose of a shaded-pole induction motor is to provide a basic and economical solution for driving small mechanical loads in applications that don't demand high starting torque or efficiency.