The gear motors dc have great advantages, among which is its ability to be stored in a relatively simple way. This, together with a number of peculiar features of the motors of dc, and of applications of electrolytic processes, electric traction, among others, allow that there are various facilities that work based on the continuous current.
The generators of dc are the same machines that transform the mechanical energy into electrical one. There is not real difference between a generator and a motor except for the direction of power flow. The generators are classified according to the way in which it provides the flow field, and these are of independent excitation, shunt, series, excitation compound cumulative compound differential, and in addition differ of their characteristics terminals (voltage, current) and therefore in the type of use.
How DC gear motors work
During the development of this report, the focus will be in relation with the principle of operation of the different versions of electrical machines currents continued to exist, given the wide field to which they are used. The understanding of such machines allows the engineer an effective choice plus the possibility to avoid situations in which accidents occur due to use or improper operation of the devices that work with this type of energy. Prior knowledge of basic theory of electrical circuits, will be of great help to understand the functions of each of the components of the machine of dc.
Fundamentals of DC gear motors
The dc gear motors are generators that convert mechanical energy into electrical energy of direct current, and motors that convert electric energy of direct current into mechanical energy. Most machines of dc are similar to that of the alternating current machines because the inside has the currents and voltages of alternating current. The dc ger motors have dc only in its external circuit due to the existence of a mechanism that converts the voltages on internal alternating current voltages direct current in the terminals. This mechanism is called the collector, and therefore the machines of direct current is also referred to as machines with collector.
Parts of a DC gear motor
- Cylinder head
- Core polar
- Pole piece
- Core pole auxiliary
- Pole piece pole auxiliary
- Hit the induced
- Roll excitation
- Roll switching
- Brushes positive
- Brushes negative
Parts 1 to 5 form the inductor. Together parts 2 and 3 are designated by field pole.
Part 6 constitutes the armature, which is wound a copper conductor forming the armature winding.
Around the cores, polar, goes past, in the form of a helix, the winding of excitation (8). Similarly, each core of the polar switching takes a winding switching (9). The part 10 represents the switch or commutator, which is constituted by several sheets isolated from each other, forming a cylindrical body.
The armature winding is attached by conductors to the plates of the commutator; armature and commutator rotate together. On the surface of the manifold to rub against a contact pressure by a spring. These contact parts are called blades. The free space between the pole pieces and the armature is called the air gap.