Permanent Magnet Dc Generator Characteristics

Self excited dc generators field coils excited by the generator.

Permanent magnet dc generator characteristics. Permanent magnet dc generators field coils excited by permanent magnets. These devices do not require a separate dc supply for the excitation circuit or do they have slip rings and contact brushes. A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. When a current carrying conductor is placed in a magnetic field it experiences a force.

The armature reaction is the opposite of the magnetic field developed by the permanent magnets and the magnetic field developed by the armature flux. The working principle of any dc motor is same i e. In this device the rotor windings have been replaced with permanent magnets. A permanent magnet generator is a device that converts mechanical energy to electrical energy.

Basic configuration of a permanent magnet dc motor is very similar to that of a normal dc motor. Separately excited dc generators field coils excited by some external source. Characteristics of dc generator. The most common type of dc generators for wind turbines and small scale wind turbine systems used to charge batteries is the permanent magnet dc generator also know as the dynamo dynamos are a good choice for newcomers to wind power as they are large heavy and generally have very good bearings so you can mount fairly hefty rotor blades directly onto their pulley shaft.

A permanent magnet dc motor also works on the same principle. There are three methods of excitation and thus three main types of dc generators.