Special Electrical Machines
SPECIAL ELECTRICAL MACHINE ON MOTOR |
Abstract
Electrical machine that converts mechanical energy to electrical energy, converts electrical energy to mechanical energy, or changes alternating current from one voltage level to a different voltage.There are several non traditional machines such as stepper motors, switched reluctance motors, permanent magnet dc machines, resolvers, linear induction machines etc. These machines are finding ever increasing applications, typically in position control systems, robotics, mecatronics, electric vehicles, high speed transportation etc.
SYNCHRONOUS RELUCTANCE MOTORS * A reluctance motor is a type of synchronous electric motor which induces non-permanent magnetic poles on the ferromagnetic rotor.
* Torque is generated through the phenomenon of magnetic reluctance.
Operating principle * Whenever a piece of ferromagnetic material is located in a magnetic field a force is exerted upon the material tending to bring it into the position of densest portion of the field. * The force tends to align the specimen of the material so that the reluctance of magnetic path passing through the material will be at a minimum.
Applications
* Used where regulated speed control is required in applications such as metering pumps and industrial process equipment. * Synthetic fiber manufacturing equipment * Wrapping and folding machine * Auxiliary time mechanism * Synchronized conveyors * Metering pumps
Advantages of syrm: * Freedom from permanent magnets, * Ability to maintain full load torque at zero speed. STEPPER MOTOR
A stepper motor is a digital actuator whose input is in the form of programmedenergization of the stator windings and whose output is in the form of discrete angular rotation.
Applications of stepper motor :
* Floppy disc drives * Quartz watch * Camera shutter
Abstract
Electrical machine that converts mechanical energy to electrical energy, converts electrical energy to mechanical energy, or changes alternating current from one voltage level to a different voltage.There are several non traditional machines such as stepper motors, switched reluctance motors, permanent magnet dc machines, resolvers, linear induction machines etc. These machines are finding ever increasing applications, typically in position control systems, robotics, mecatronics, electric vehicles, high speed transportation etc.
SYNCHRONOUS RELUCTANCE MOTORS * A reluctance motor is a type of synchronous electric motor which induces non-permanent magnetic poles on the ferromagnetic rotor.
* Torque is generated through the phenomenon of magnetic reluctance.
Operating principle * Whenever a piece of ferromagnetic material is located in a magnetic field a force is exerted upon the material tending to bring it into the position of densest portion of the field. * The force tends to align the specimen of the material so that the reluctance of magnetic path passing through the material will be at a minimum.
Applications
* Used where regulated speed control is required in applications such as metering pumps and industrial process equipment. * Synthetic fiber manufacturing equipment * Wrapping and folding machine * Auxiliary time mechanism * Synchronized conveyors * Metering pumps
Advantages of syrm: * Freedom from permanent magnets, * Ability to maintain full load torque at zero speed. STEPPER MOTOR
A stepper motor is a digital actuator whose input is in the form of programmedenergization of the stator windings and whose output is in the form of discrete angular rotation.
Applications of stepper motor :
* Floppy disc drives * Quartz watch * Camera shutter