What are the control techniques in SRM?
3. Control techniques
- 3.1 Voltage impulse control. The impulse control is the simplest controller for the SRM.
- 3.2 Current control. The voltage is kept constant in the last controller, expecting the current to be constant as well.
- 3.3 Torque control.
What are the applications of SRM?
Switched Reluctance Motor Applications
- Domestic appliances such as washing machines, vacuum cleaners, fans, etc.
- Machine tools: Planers, vertical lathes, drilling machines.
- General machinery: fans, pumps, compressors.
- Food mixing machinery.
- Lifting machines: lifts, winches, conveyors.
What are the types of power controllers used for SRM?
What are the different power controllers used for the control of SRM?
- Using two power semi conductors and two diodes per phase.
- Phase windings and bifilar wires.
- Dump – C converter.
- Split power supply converter.
What are the two types of reluctance motor?
There are two types of reluctance motors, switched reluctance motors (SRM) and synchronous reluctance motors (SynRM). Switched reluctance motors have concentrated windings, while synchronous reluctance motors have distributed windings.
What is meant by reluctance torque?
Reluctance torque is the torque generated because the motor is moving to a position where the reluctance seen by the armature flux is declining. A simple application of this principle is the refrigerator magnet, which is held in place by reluctance force.
How does a reluctance motor work?
A reluctance motor is a type of electric motor that induces non-permanent magnetic poles on the ferromagnetic rotor. The rotor does not have any windings. It generates torque through magnetic reluctance. Reluctance motors can deliver high power density at low cost, making them attractive for many applications.
What causes torque ripple?
Dr. Nir Vaks: Torque ripple is created by harmonics in the electromagnetic torque, which exist in all electric machines regardless of type or design. The harmonics are created by non-idealities in the electromagnetic fields produced by the rotor and stator interaction.
Where are switched reluctance motor used?
Switched reluctance motors are especially suitable for a variety of coal mining equipment, such as cutters, conveyors and coal ploughs. This type of motor provides a low starting current and a high torque (30% of rated current gives starting torque up to 150%).
How does switched reluctance motor work?
The working principle of the switched reluctance motor is, it works on the principle of variable reluctance that means, the rotor of this motor constantly tries to align through the lowest reluctance lane. The formation of the rotary magnetic field can be done using the circuit of power electronics switching.
What is a reluctance machine?
Synchronous reluctance motors are the electrical machines, used to convert electric energy into mechanical energy. It is a new giant of the electrical world. It is fascinating how these motors are superior to Nicola Tesla’s induction motors! the one being used for more than a century now.
How does the reluctance motor operate?
These motors work with a precise rotating magnetic field (RPM) by synchronizing the speed of the rotor using the RMF of the stator. The working principle of reluctance motor is, whenever a magnetic material is located within the magnetic field, then it always brings into line in the less reluctance way.
How is reluctance torque produced?
Reluctance torque or alignment torque is experienced by a ferromagnetic object placed in an external magnetic field, which causes the object to line up with the external magnetic field. Reluctance torque is mainly developed in the reluctance motor. It is produced in the motor due to the varying reluctance.
What can a Switched Reluctance Machine be used for?
The switched reluctance machine can operate as a generator and as a motor by simply changing the firing angles. The switched reluctance machine has been studied for generator applications especially where robustness, high speed, and fault tolerance are important.
Is the Switched Reluctance motor the same as the variable reluctance motor?
The switched reluctance motor is topologically and electromagnetically similar to the variable-reluctance stepper motor.
When was switched reluctance motor and drive first published?
The section below giving an overview of switched reluctance motors & drives was first published in 1998 and has been referenced from various sources over the intervening years. The name switched reluctance has now become the popular term for this class of electric machine.
Where did the term variable reluctance drive come from?
The term became popular from the 1980s onwards, through the efforts of the first commercial exploiters of the technology, Switched Reluctance Drives Ltd. The machines are alternatively known as variable reluctance motors, reflecting the origins of the technology being derived from VR stepper motors.