What is a Reluctance Motor : Working & Its Applications

Hello friends, I hope you all are having fun in your lives. In this post, we will have a detailed look at the Introduction to Reluctance Motor. There are many types of motors commonly used in industries. Reluctance is a type of single-phase motor that is more advanced than other motors and similar configuration to other motors, such as stator and rotor configurations. The operation of these motors is that they operate with an accurate value of RPM or rotating magnetic field, having to synchronize the rotation speed to the RMF of the stator.

The power provided by these motors is higher than other categories of motors having similar costs. in this post, we will discuss working, applications, and some related parameters. So let’s get started with Introduction to Reluctance Motor.

Table of Contents

Introduction to Reluctance Motor

The reluctance motor is a type of motor that relies on the reluctance torque for its function. The reluctance torque is a type of torque induced in the iron-type device in the presence of an exterior field.
The torque exists since the exterior field generates an inner field in the iron-made device, and torque exists between the 2 fields, causing the device to align with the exterior field.
For reluctance torque to be generated in a device. It should be stretched about the axes at angles related to the angle among the contingent poles of the outer field.

Synchronous Reluctance Motor

A synchronous reluctance motor comes with the same number of stator and rotor poles. The projection on the rotor configuration of adding internal flux barriers, holes that direct magnetic flux over what is called the direct axis. The number of poles comes with 4 or 6.
The rotor works at synchronous speed without a current-carrying component. Rotor losses are less than in induction motors and come with less torque.
If started with synchronous speed, the motor can work with a sinusoidal voltage. Speed control needed a variable frequency drive.
High-power synchronous RMs need rare-earth components like neodymium and dysprosium.

Reluctance Motor Construction

The parts of the construction are shown below. For the creation of this motor, there a design is created through the elimination of a tooth-like configuration for the creation of 4 poles.
There is a short circuit configured at 2 endpoints. When there is alignment between the stator and single-phase power, the motor operates similarly to the single-phase induction motor.
When the speed of rotation of the motor is larger than the synchronous speed, then the centrifugal switch will automatically do separation from the auxiliary winding.
The motor raises the speed similar to a single-phase motor through the main winding procedure.

Reluctance Motor Applications

Those are the main applications of the reluctance motor.
It is used in automatic regulator circuits.
Recording instruments used in this module.
It is used in clocks.
Gramophones used this device.
It is employed in electric vehicles.
Different machines, such as a drill press, are used.
Control devices use this module.

Working of Reluctance Motor

The working features of the reluctance motor are configured with features of the rotor to minimize the reluctance path. The detailed steps for working the reluctance motor are as follows.

Magnetic Flux Creation:

If the stator winding is energized with an AC supply, a rotating magnetic field is generated.

Rotor Alignment:

The ferromagnetic rotor faces a force that pulls toward a position where the magnetic reluctance is reduced. These forces make torques that result in the rotor rotating.

Continuous Rotation:

When the magnetic field of the stator rotates, the rotor configured with varying fields causes sustained rotation.

The reluctance motor torque generation is based on the change in reluctance, which is based on the rotor position relative to the magnetic field stator.

The working of a reluctance motor is based on magnetic reluctance. If the stator winding of a reluctance motor is energized, it generates rotating magnetic poles.

The rotor is configured with these rotating stator magnetic poles and position of reluctance, making the rotor rotate continuously.

Torque Speed Characteristics of Reluctance Motor

The reluctance motor generates a certain amount of starting torque at low speed due to the rotating magnetic field given by the stator.

Their torque generation reduces sharply when the speed is synchronized.

They have features of producing a maximum torque of 210 Nm. As a result of the non-linear relationship between torque and current, reluctance motors face torque ripple.

High Starting Torque: