An electric motor utilises the magnetic effect of current. It works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it, a force acts on the coil which rotates it continuously.
How does a motor work physics?
A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves. The direction of the current must be reversed every half turn, otherwise the coil comes to a halt again.
What does motor mean in physics?
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 is the principle of AC and dc motor?
Both AC and DC motors use electrical current to produce rotating magnetic fields that, in turn, generate rotational mechanical force in the armature—located on the rotor or stator—around the shaft.
How motor works simple explanation?
Motors turn electrical energy into rotational motion called torque. Many robots use the torque provided by motors to make their wheels spin or to move the jointed parts in their arms or legs. These motors are known as actuators. The simple motor built in class uses a coil that is a temporary electromagnet.
What is the law of electric motor?
Faraday’s law of induction is the fundamental law on which electric motors operate.
What is the basic physics of an electric motor?
Electric motors involve rotating coils of wire which are driven by the magnetic force exerted by a magnetic field on an electric current. They transform electrical energy into mechanical energy.
What is motor formula?
Motor RPM Formula Calculation Examples For an AC motor, the number of poles and the frequency determine the no-load RPM. For a 60 Hz system with four poles, the RPM equation would be: (Hz x 60 x 2) / number of poles = no-load RPM. (60 x 60 x 2) / 4. 7,200 / 4 = 1,800 RPM.
Why is it called a motor?
“Motor” is rooted in the Classical Latin movere, “to move.” It first referred to propulsive force, and later, to the person or device that moved something or caused movement. “As the word came through French into English, it was used in the sense of ‘initiator,'” says Fuller.
What is the equation of motor?
k = N = V – IaRa / kΦ The above relation shows that the speed of a DC motor can be controlled through change in voltage, flux and armature resistance.
What is DC motor principle?
A DC motor is a mechanical rotating device which converts electrical energy into mechanical energy. It is based on the principle of force acting on a current carrying wire in a magnetic field.
Which principle is used in AC motor?
An AC is an electric motor that converts alternating current into mechanical power. An AC motor works on the principle of electromagnetic induction. Based on the operation principle, they are classified into two types as synchronous motors and induction motors.
Why is DC motor used?
Many applications require a high starting torque. The D.C. motor, by its very nature, has a high torque vs. speed characteristic, enabling it to deal with high resistive torques and absorb sudden rises in load effortlessly; the motor speed adapts to the load.
What is motor simple words?
1 : one that imparts motion specifically : prime mover. 2 : any of various power units that develop energy or impart motion: such as. a : a small compact engine. b : internal combustion engine especially : a gasoline engine. c : a rotating machine that transforms electrical energy into mechanical energy.
What is motor short answer?
It is a rotating device (device which rotates or move round and round) It converts electrical energy into mechanical energy. They are used in Electric fans, Refrigerators, Washing Machines, Mixers, etc.
What are the 3 types of motor?
The types of Electric motors are available in three main segments like AC motor, DC motor, & special purpose motors.
What are the 4 main motor types?
- Permanent Magnet DC Motors. The permanent magnet motor uses a permanent magnet to create field flux.
- Series DC Motors. In a series DC motor, the field is wound with a few turns of a large wire carrying the full armature current.
- Shunt DC Motors.
- Compound DC Motors.
What is the energy of a motor?
An electric motor is a device used to convert electrical energy into mechanical energy. Scientifically speaking, the electric motor is a unit used to convert electric power into motive energy or electrical energy into mechanical energy.
What force can be used in a motor?
A magnet exerts a force on current-carrying wire. This force can be used to make an electric motor.
What is the SI unit of motor?
The SI Unit for speed is rad/s. However, most manufacturers use rpm as the unit to specify the rotational speed of the motors. Motor Control Blockset prefers rpm as the unit of rotational speed over rad/s.
What is speed in motor?
Speed of a motor is the magnitude of the rotational velocity of the motor shaft. In a motion application, speed of the motor dictates how fast the axis rotates – the number of complete revolutions per unit time.
What is rpm in motor?
RPM stands for rotations per minute and is also abbreviated rpm. This is a unit which describes how many times an object completes a cycle in a minute. This cycle can be anything, the pistons in a internal combustion engine (see figure 1) repeating their motion or a wind turbine spinning once all the way around.
How does a motor rotate?
Motor Rotation Using a Magnet/Magnetic Force Alternatively, supplying current to a conductor generates a magnetic field around, creating a magnetic force (Rotational magnetic field). This results in the same effect as rotating a magnet.
What is motor and its types?
We know there are generally two types of motors, AC motor, and DC motor. AC motors are flexible for speed control and demand low power during start. On the other hand, DC motors are widely used due to its initial cost of low power units is less compared to AC and can be easily installed.
What are the properties of a motor?
- Current (Amps)
- Hertz / Frequency.
- Insulation Class.
- Service Factor.