面试题与答案

Slip is the difference between the synchronous speed of the rotating magnetic field and the actual speed of the rotor. It determines the rotor speed relative to the rotating magnetic field.

Laminations reduce eddy current losses in the transformer core by minimizing the closed loops for current flow.

Torque is the measure of the rotational force exerted by a motor. In electrical machines, it is the product of the force applied and the distance from the axis of rotation.

The stator provides a stationary magnetic field in electric motors, inducing a magnetic field in the rotor and causing it to rotate.

A motor converts electrical energy into mechanical energy, while a generator converts mechanical energy into electrical energy.

Flux is the magnetic field generated by the flow of current in a coil. It plays a crucial role in the operation of transformers, motors, and generators.

The armature in an electric generator is the rotating part that cuts across magnetic lines, inducing an electromotive force (EMF) in the coils and generating electrical power.

Brushes in a DC motor maintain electrical contact between the rotating armature and the stationary part (stator), allowing current to flow into the armature windings.

Horsepower is a unit of power measurement, equivalent to 745.7 watts. It is commonly used to express the power output of motors and engines.