Answer. By increasing the potential difference b/w the terminals of the battery in DC motor and by increasing the no. Of coils , by placing an axle in between.
What determines the power of an electric motor?
Basic mechanical power measurements
In an electric motor, the mechanical power is defined as the speed times the torque. Mechanical power is typically defined as kilowatts (kW) or horsepower (hp) with one watt equaling one joule per second or one Newton-Meter per second. Horsepower is the work done per unit of time.
How can the power of an electric motor be increased explain with any three points?
We can increase the turning force (or torque) that the motor can create in three ways: either we can have a more powerful permanent magnet, or we can increase the electric current flowing through the wire, or we can make the coil so it has many “turns” (loops) of very thin wire instead of one “turn” of thick wire.
Which type of electric motor is most efficient?
Most efficient vehicle in the world uses brushless motor in drivetrain. One little hydrogen fuel-cell vehicle holds the Guinness world record for the most efficient vehicle … and uses a slotless brushless 60L-H-175-A from Koford Motors to drive its rear power wheel.
Why are electric motors more efficient?
The first is that electric motors convert electricity to motion three times more efficiently, in energy terms, than the internal-combustion engine does with gasoline. The second is that we do not recharge an electric battery in 90 seconds.
What is the maximum rpm of an electric motor?
Two pole AC motors operating at 60 Hz will always run at approximately 3600 rpm, and four pole AC motors will have speeds around 1800 rpm.7 мая 2018 г.
What gives an electric motor torque?
Electric motors operate on three different physical principles: magnetism, electrostatics and piezoelectricity. In magnetic motors, magnetic fields are formed in both the rotor and the stator. The product between these two fields gives rise to a force, and thus a torque on the motor shaft.
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 does a basic electric motor work?
This simple electric motor works by the magnetic force F = IL x B. The current goes around the coil so that it points one direction in one end of the loop and in the other direction at the other end of the loop. The magnetic field at both of these spots points in the same direction.
What are the 6 parts of an electric motor?
These six components include:
- 1) The Rotor. The rotor is the moving part of your electric motor. …
- 3) The Bearings. The rotor in your electric motor is supported by bearings, which allow it to turn on its axis. …
- 4) The Windings. …
- 5) The Air Gap. …
- 6) The Commutator. …
- What Do All of These Components Have in Common?
What is more efficient AC or DC motor?
Consequently, AC motors are less efficient than DC motors. In fact, the DC motor is 30% more efficient than AC motors due to the secondary magnetic field being generated from the permanent magnets rather than copper windings.
Can an electric motor generate electricity?
Converting energy from one form to another is the key to understanding the differences between electric motors and generators. An electric motor converts electricity into mechanical energy, providing a power source for machinery. A generator does the opposite of this, converting mechanical energy into electricity.
How long can an electric motor run continuously?
You should anticipate, given proper attendance, that the motor can run continuously for the life of its brushes, which should be in the range of six months to a year. Presuming that the motor is too small to have its brushes changed by a trained electrician while running.
How efficient is an electric engine?
An EV motor is around 85 – 90 per cent efficient when converting coal-fired energy to power.
What are some disadvantages of electric cars?
Top 7 Disadvantages of Electric Cars
- Charging Woes. Electric powered vehicles require charging stations, and for people to travel long distances there needs to be a network of such stations located strategically. …
- Traveling Distance (Range) …
- Lack of Power. …
- Overloaded Batteries. …
- They Are Expensive. …
- They Cause Pollution. …
- They’re Heavy.