DC Motors

Give two ways you can reverse the direction of a basic dc motor?

• Reverse the current

• Keep the current the same

• Reverse the magnetic field

• Keep the magnetic field the same

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What does the output torque depend on? Check all that apply.

• The electrical input

• The size of the wheels

• The design of the motor

What is a stator/magnet?

• turning coil of wire

• made of carbon, used to relay current from external circuit to commutator

• stationary part of the motor, it provides a rotating magnetic field that drive the armature to rotate.

Tags

NGSS.HS-PS2-5

What is the armature/rotor?

• made of carbon, used to relay current from external circuit to commutator

• turning coil of wire

• battery

Tags

NGSS.MS-PS2-3

What is the commutator?

• turning coil of wire

• ring typically made of copper, ensures that the torque acting on the armature is always in the same direction

• battery

Tags

NGSS.HS-PS3-5

What are the brushes?

• made of carbon, used to relay current from external circuit to commutator

• ring typically made of copper, ensures that the torque acting on the armature is always in the same direction

• stationary part of the motor, it provides a rotating magnetic field that drive the armature to rotate.

True or False: As you add higher load onto the motor, it will fight back with opposing torque so it keeps rotating.

• True

• False

As you increase the load on the motor, it has to draw more ________ from the battery.

• Voltage

• Brush load

• Current

Current and rotational speed have an ________ relationship. The faster the motor can spin, the less current it will draw.

• Inverse

• Proportional

• Dynamic

DC motors are found in:

• Automobiles

• Industrial Equipment

• VEX Robotics

• Cats