{"id":553,"date":"2023-06-30T15:17:04","date_gmt":"2023-06-30T07:17:04","guid":{"rendered":"https:\/\/electricalwire.wiki\/?p=553"},"modified":"2023-06-30T15:17:05","modified_gmt":"2023-06-30T07:17:05","slug":"dc-generator","status":"publish","type":"post","link":"https:\/\/electricalwire.wiki\/?p=553","title":{"rendered":"DC Generator"},"content":{"rendered":"\n

A DC generator is a device that converts mechanical energy into DC electrical energy. It is mainly used as a DC motor required for DC motors, electrolysis, electroplating, electrometallurgy, charging and excitation of AC generators. Although power rectification elements are also used where DC power is needed to turn AC power into DC power, DC motors are not yet comparable to AC generators in terms of ease of use, reliability of operation and certain work performance. DC generators have better potential waveforms and less electromagnetic interference.<\/p>\n\n\n\n

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Structure<\/p>\n\n\n\n

The structure of a rotating motor must have a structure that meets both electromagnetic and mechanical requirements, and the rotating motor must have both static and rotating parts.<\/p>\n\n\n\n

1. The stationary part of a DC motor is called the stator<\/p>\n\n\n\n

Function – generate magnetic field<\/p>\n\n\n\n

Composed of main pole, commutation pole, seat and brush device, etc.<\/p>\n\n\n\n

2. The rotating part of the DC motor is called the rotor (usually called the armature)<\/p>\n\n\n\n

Function — Generate electromagnetic torque and induced electric potential<\/p>\n\n\n\n

Consists of armature core and armature winding, commutator, shaft, fan, etc.<\/p>\n\n\n\n

Stationary part<\/p>\n\n\n\n

2. Commutation pole (also known as additional pole or inter-pole)<\/p>\n\n\n\n

Function – to improve commutation<\/p>\n\n\n\n

The commutation pole is installed between the two main poles and is also composed of the core and winding<\/p>\n\n\n\n

The core is generally machined from a single piece of steel or steel plate; the commutation pole winding is connected in series with the armature winding<\/p>\n\n\n\n

3. Machine base The machine base is usually made of cast iron or thick iron plate welded together, and has two roles:<\/p>\n\n\n\n

Fixed main pole, commutation pole and end cover<\/p>\n\n\n\n

As part of the magnetic circuit. The part of the base through which the magnetic flux passes is called the magnetic yoke.<\/p>\n\n\n\n

4. Brush device<\/p>\n\n\n\n

Role – to bring in or draw out DC voltage, DC current<\/p>\n\n\n\n

Consists of brush, brush grip, brush holder and copper wire<\/a> braid<\/p>\n\n\n\n

Rotating part<\/p>\n\n\n\n

1. Armature core Two purposes:<\/p>\n\n\n\n

As the main part of the main magnetic circuit Embedded armature winding, usually made of 0.5mm thick silicon steel sheet <\/a>punching laminated<\/p>\n\n\n\n