Why does the coil spin in an electric motor?

A coil of wire becomes an electromagnet when current passes through it. The electromagnet interacts with a permanent magnet, causing the coil to spin.

What causes coils to spin?

The coil of wire is mounted in the gap between the two magnets. The split rings make electrical contact with the coil and reverse the current every half turn. When an electric current flows through the coil, a force is exerted on the coil, causing it to spin.

How does the coil rotate in a electric motor?

A simple DC motor has a coil of wire that can rotate in a magnetic field. The current in the coil is supplied via two brushes that make moving contact with a split ring. The coil lies in a steady magnetic field. The forces exerted on the current-carrying wires create a torque on the coil.

How can a motor spin fast?

How can I make the motor spin faster or slower? ANSWER: In order to make the motor spin faster or slower you must increase or decrease the strength of the magnetic field. This is done by either changing the amount of current running through the motor or varying the distance of the permanent magnets from the motor.

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What keeps the coil of wire spinning?

When electricity is passed through a wire coil (as you are doing when you connect the coil to the battery), you create an electromagnetic field, which pushes the coil away from the magnet. … When the circuit is complete again, the magnetic field once again repels the coil, so it keeps spinning.

Does the motor rotate continuously when there is current?

Because the current flows in opposite directions in the wires, Fleming’s Left-Hand Rule tells us the two wires will move in opposite directions. … If the coil of wire could carry on moving like this, it would rotate continuously—and we’d be well on the way to making an electric motor.

Can you make the coil spin in both directions?

Simply put, DC motors can turn in either direction (clockwise or counter-clockwise) and can be easily controlled by inverting the polarity of the applied voltage. Strictly speaking, the motors can actually create a force in either direction.

How do I lower the RPM on my electric motor?

A couple of things you can do:

  1. Use gears to change ratio of speed, which is what you’re going to do. …
  2. Use a stepper motor, which are commonly used for high-torque, low RPM applications.
  3. Find some sort of PWM control circuit to slow it down, although you probably won’t be able to get it down to 5-10RPM.

What makes a motor more powerful?

The strength of the motor (torque) is determined by voltage and the length of the wire in an electromagnet in the stator, the longer the wire (which means more coils in the stator) the stronger the magnetic field. This means more power to turn the rotor.

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How can I make my coils spin faster?

The speed of rotation of the coil can be increased by:

  1. increasing the size of the current;
  2. using a stronger magnet;
  3. increasing the number of turns of wire in the coil;
  4. reducing friction between the coil and the axel it rotates on.

How can we increase the power of DC motor?

The power of the DC motor increases by increasing the torque developed by the shaft/rotor which in turn depends on the current in direct proportion.

How do you change the speed of a DC motor?

Thus, the speed of a DC motor can be controlled in three ways:

  1. By varying the supply voltage.
  2. By varying the flux, and by varying the current through the field winding.
  3. By varying the armature voltage, and by varying the armature resistance.
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