Dynamic Braking of Induction Motors
... • Methods of braking include DC Injection and Capacitive braking. • Note that there is no “holding” torque at the end of the braking period – need a mechanical brake to hold the shaft. ...
... • Methods of braking include DC Injection and Capacitive braking. • Note that there is no “holding” torque at the end of the braking period – need a mechanical brake to hold the shaft. ...
Budgeting - Learning While Doing
... Induction Motor • Most AC motors are induction motors • Induction motors are favored due to their ruggedness (no brush), simplicity and cheap. • 90% of industrial motors are induction motor. ...
... Induction Motor • Most AC motors are induction motors • Induction motors are favored due to their ruggedness (no brush), simplicity and cheap. • 90% of industrial motors are induction motor. ...
Power Control Circuits
... applications that require variable speed control, high torque, or both. Speed of most DC motors can be controlled smoothly and easily form zero to full speed. They are used in many acceleration and deceleration applications. ...
... applications that require variable speed control, high torque, or both. Speed of most DC motors can be controlled smoothly and easily form zero to full speed. They are used in many acceleration and deceleration applications. ...
AC/DC and Stepper Motors
... field to move the rotor • The rotor is carried around the magnetic field, but at a slightly slower rate – Induction motors are also known as asynchronous motors – The difference between the rotors output and the magnetic field is called slip which increases with load ...
... field to move the rotor • The rotor is carried around the magnetic field, but at a slightly slower rate – Induction motors are also known as asynchronous motors – The difference between the rotors output and the magnetic field is called slip which increases with load ...
The Rules of Electromagnetism
... Commutator and the Brushes which make a sliding contact with the commutator. The purpose of the commutator is to reverse the armature current every half-revolution to ensure that the torque exerted on the armature continues to act in the forward direction. The sparking from the reversal of the curre ...
... Commutator and the Brushes which make a sliding contact with the commutator. The purpose of the commutator is to reverse the armature current every half-revolution to ensure that the torque exerted on the armature continues to act in the forward direction. The sparking from the reversal of the curre ...
Solutions to Period 16 Exercises
... d) An electromagnet is used to spin an electromagnet. e) An electric motor can be made from all of the above designs. Since you need at least one changing magnetic field, two permanent magnets do not work. E.2 = c 16-Ex 1&2 ...
... d) An electromagnet is used to spin an electromagnet. e) An electric motor can be made from all of the above designs. Since you need at least one changing magnetic field, two permanent magnets do not work. E.2 = c 16-Ex 1&2 ...
How Motors Operate Presented by John Freeland
... connection determines if the motor runs clockwise or counterclockwise If both ends of the starting and running windings are accessible, the motor can be reversed “Induction” in a split phase induction motor means a current and therefore a magnetic field is induced in the rotor by the stator magnetic ...
... connection determines if the motor runs clockwise or counterclockwise If both ends of the starting and running windings are accessible, the motor can be reversed “Induction” in a split phase induction motor means a current and therefore a magnetic field is induced in the rotor by the stator magnetic ...
DC Motors and Generators
... – 1. Magnetic poles of the magnets do not change – 2. Magnetic poles of the armature can change – 3. Motor can change direction if the voltage to the armature changes • C. DC motors can operate in a clockwise or counterclockwise direction. • D. The strength of the magnetic field affects the speed an ...
... – 1. Magnetic poles of the magnets do not change – 2. Magnetic poles of the armature can change – 3. Motor can change direction if the voltage to the armature changes • C. DC motors can operate in a clockwise or counterclockwise direction. • D. The strength of the magnetic field affects the speed an ...
AC motor
An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings.Less commonly, linear AC motors operate on similar principles as rotating motors but have their stationary and moving parts arranged in a straight line configuration, producing linear motion instead of rotation.