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The induction motor is one of the most important inventions in modern history. It turned the wheels of progress at a new speed and officially kicked off the second industrial revolution by drastically improving energy generation efficiency and making the long-distance distribution of electricity possible.
Why was the electric motor important?
Electric motors impact almost every aspect of modern living. Refrigerators, vacuum cleaners, air conditioners, fans, computer hard drives, automatic car windows, and multitudes of other appliances and devices all use electric motors to convert electrical energy into useful mechanical energy.
Why was the induction electric motor invented?
Nikola Tesla invented the induction motor with rotating magnetic field that made unit drives for machines feasible and made AC power transmission an economic necessity.
What are the applications of induction motor?
The single-phase induction motors are used in low power applications. These motors are widely used in domestic and industrial applications.Three-Phase Induction Motor:
- Lifts.
- Cranes.
- Hoists.
- Large capacity exhaust fans.
- Driving lathe machines.
- Crushers.
- Oil extracting mills.
- Textile and etc.
What happens when induction motor is loaded?
If the load on the induction motor is increased the current will increase to deliver the demanded power. The slip of the motor will increase with an increase of loading on the motor, and the speed of the motor will decrease accordingly.
What is the role of the electric motor in the appliances?
Answer. Answer: The role of electric motor is to converts electrical energy into mechanical energy, so that it can operate the appliances.
What makes an electric 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.
What is the difference between an induction motor and a synchronous motor?
A three-phase synchronous motor is a doubly excited machine, whereas an induction motor is a single excited machine. The armature winding of the synchronous motor is energized from an AC source and its field winding from a DC source. The stator winding of Induction Motor is energized from an AC source.
What size electric motor do I need?
General rule of thumb: you need at least 2 lbs. of thrust for every 100 lbs. of fully-loaded boat weight (people and gear included). If things like wind or current are major factors where you fish, you’ll want a little extra thrust.
Why do you call an induction motor as an asynchronous motor?
Hence, the induction motor is called an asynchronous motor, because there is no separate excitation source available for the rotor. Rotor movement is dependent on the induction of current in it. Rotor always rotates at less speed than synchronous speed, as it is always lagging from the stator.
Which motor is best for electric vehicle?
Brushless DC Motors BLDC motors have traction characteristics like high starting torque, high efficiency around 95-98%, etc. BLDC motors are suitable for high power density design approach. The BLDC motors are the most preferred motors for the electric vehicle application due to its traction characteristics.
How did the electric motor impact society?
The electric motor has changed the framework of human society. Electric motors are important in a lot of of objects society use everyday such as fans, fridges, and washing machines. New jobs are also being made in manufacturing, repair technician, and new inventions and research.
What is the principle of induction motor?
The motor which works on the principle of electromagnetic induction is known as the induction motor. Electromagnetic induction is the phenomenon in which the electromotive force induces across the electrical conductor when it is placed in a rotating magnetic field.
How important is the electric motor in our daily lives?
Electric motors are extremely important in modern-day life. They are used in vacuum cleaners, dishwashers, computer printers, fax machines, video cassette recorders, machine tools, printing presses, automobiles, subway systems, sewage treatment plants, and water pumping stations, to mention only a few applications.
What is induction motor example?
Examples: Compressor, Crushers, Conveyors, etc. Class D Motor: Highest Starting torque of all the class motor, low starting current and high operating slip. This type of motors has low efficiency suitable for intermediate loads. Examples: Bulldozers, Die stamping, etc.
What are the main parts of induction motor?
The stator of the three-phase induction motor consists of three main parts :
- Stator frame,
- Stator core,
- Stator winding or field winding.
What are the types of induction motor?
Types of Induction Motor: A Concise and Useful Guild
- Types of Single-Phase Induction Motors. Split Phase Induction Motors. 2&3. Capacitor Start and Capacitor Start Capacitor Run Induction Motors. Shaded Pole Induction Motors.
- Types of Three-Phase Induction Motors. Squirrel Cage Induction Motor. Slip-ring or Wound Rotor Induction Motor.
How does an induction motor start?
A three-phase Induction Motor is Self Starting. When the supply is connected to the stator of a three-phase induction motor, a rotating magnetic field is produced, and the rotor begins rotating and the induction motor starts.
What determines the RPM of an electric motor?
The rotating speed of an electric motor depends on two factors: its physical construction, and the frequency (Hz) of the voltage supply. Electrical engineers select the speed of a motor based on the needs of each application, similar to how the mechanical load determines the horsepower required.
What determines the power of a motor?
In an electric motor, the mechanical power is defined as the speed times the torque. The synchronous speed is the speed of the stator’s magnetic field rotation, calculated as 120 times the line frequency divided by the number of poles in the motor.
How does an electric motor work simple explanation?
An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor’s magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor’s shaft.
What household appliances use electric motor?
- Computer. One of the most common household appliances ever since the dawn of the Internet!
- Refrigerator. Another common household appliance, the refrigerator needs small motors to operate its compressor.
- Microwave oven.
- Washing machine.
- Vacuum cleaner.
- Smartphone.
- Electric toothbrush.
- Electric fan.
Why is a commutator used in a motor?
In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. Commutators are relatively inefficient, and also require periodic maintenance such as brush replacement.
