BASIC OPERATION OF A MOTOR IN DC
Electric vehicles can use a wide range of DC motors. Anyway, the basic engine and easier to understand is the "motor with brushes" in DC. This type of engine is largely used for portable tools, toys, power windows of cars, and in consumer applications such as the dryer, even if they are fed with an AC source.
The classic DC motor is shown in Figure 24, the DC motor has permanent magnets and brushes. This engine has a simplified single coil, and the current is passing through the wire close to the magnets creates a force in the coil. Current X flowing brush, half of commutative ring, surrounding the coil, and get to another ring switch B and finally to the brush Y (XABY). On one side (as shown in Figure 24) the force goes up, and force the other side goes down, this occurs because the current is flowing through the brushes and commutator, these two forces are the spool. The coils rotate with the switch, and once the coils are free of magnetism torque makes these keep turning until the ring switch to reconnect with the brushes, when this happens the current is flowing in the same direction relative to the permanent magnets, and therefore the forces are in the same direction, causing the engine to continue turning as before. As current now flows from the brush X switch in the middle B ring, which flows through the coil to the other half of the ring switch A to finally reach the brush Y (XBAY). Switch
action causes the current in the coils is kept changing direction, so that force is retained in the same direction, even if the coil is moving.
Figure 24. Diagram showing the simple operation of a DC motor with brushes.
Source. /.../ Blog.artegijon.com 11/principio-motor.jpg
Clearly, in a DC motor there really is much better according to Figure 24. The most important are listed below:
• Cables rotating coil, also called armored, are wound is an iron core, so that the magnetic field to concentrate and have not lost to the air, which makes weaken the magnetic underworld.
• More than one winding is used, this so that the current flowing in the wires to spend more time close to the magnets. This means that the switch does not just consist of two halves as in Figure 24, but usually has two segments for each coil or at least a segment of each coil that you over.
• Each winding consists of coils, so that the torque increase (more turns, more strength).
• More than one pair of magnets can be used to increase the turning force.
Figure 25 (a) shows a cross section of a DC motor. In this chart we can see how the current flows out of the page or into the page based on the position in which it is the rotor. The Figure 25 (b) shows the conventions to indicate the direction of current flow.
Figure 25 (a) cross section of a DC motor (b) Convention for the flow of current.
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The classic DC motor is shown in Figure 24, the DC motor has permanent magnets and brushes. This engine has a simplified single coil, and the current is passing through the wire close to the magnets creates a force in the coil. Current X flowing brush, half of commutative ring, surrounding the coil, and get to another ring switch B and finally to the brush Y (XABY). On one side (as shown in Figure 24) the force goes up, and force the other side goes down, this occurs because the current is flowing through the brushes and commutator, these two forces are the spool. The coils rotate with the switch, and once the coils are free of magnetism torque makes these keep turning until the ring switch to reconnect with the brushes, when this happens the current is flowing in the same direction relative to the permanent magnets, and therefore the forces are in the same direction, causing the engine to continue turning as before. As current now flows from the brush X switch in the middle B ring, which flows through the coil to the other half of the ring switch A to finally reach the brush Y (XBAY). Switch
action causes the current in the coils is kept changing direction, so that force is retained in the same direction, even if the coil is moving.
Figure 24. Diagram showing the simple operation of a DC motor with brushes.

Source. /.../ Blog.artegijon.com
• Cables rotating coil, also called armored, are wound is an iron core, so that the magnetic field to concentrate and have not lost to the air, which makes weaken the magnetic underworld.
• More than one winding is used, this so that the current flowing in the wires to spend more time close to the magnets. This means that the switch does not just consist of two halves as in Figure 24, but usually has two segments for each coil or at least a segment of each coil that you over.
• Each winding consists of coils, so that the torque increase (more turns, more strength).
• More than one pair of magnets can be used to increase the turning force.
Figure 25 (a) shows a cross section of a DC motor. In this chart we can see how the current flows out of the page or into the page based on the position in which it is the rotor. The Figure 25 (b) shows the conventions to indicate the direction of current flow.
Figure 25 (a) cross section of a DC motor (b) Convention for the flow of current.