Permanent Magnet Dc Generator Characteristics

In this device the rotor windings have been replaced with permanent magnets.

Permanent magnet dc generator characteristics.

These devices do not require a separate dc supply for the excitation circuit or do they have slip rings and contact brushes. The working principle of any dc motor is same i e. The characteristics of any motor are done to know the performance of the machine in different conditions. Self excited dc generators field coils excited by the generator.

Dc generators are classified based on how their fields are excited i e. A permanent magnet dc motor also works on the same principle. Basic configuration of a permanent magnet dc motor is very similar to that of a normal dc motor. Characteristics of dc generator.

There are three methods of excitation and thus three main types of dc generators. A permanent magnet generator is a device that converts mechanical energy to electrical energy. When a current carrying conductor is placed in a magnetic field it experiences a force. The term synchronous refers here to the fact that the rotor and magnetic field rotate with the same speed because the magnetic field is generated through a shaft mounted permanent magnet mechanism and current is induced into the stationary armature.

A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. The armature reaction is the opposite of the magnetic field developed by the permanent magnets and the magnetic field developed by the armature flux.