What is the working principle of DC series motor?
What is DC Motor? The DC motor is the motor which converts the direct current into the mechanical work. It works on the principle of Lorentz Law, which states that “the current carrying conductor placed in a magnetic and electric field experience a force”.
What are the principal characteristics of a series DC motor?
The characteristic curves of a DC series motor are those curves which show relationships between the following quantities.
- Torque and armature current (Ta/Ia characteristic).
- Speed and armature current (N/Ia characteristic)
- Speed and torque (N/Ta characteristic) It is also known as mechanical characteristic.
What is DC series motor?
A series DC motor connects the armature and field windings in series with a common D.C. power source. The motor speed varies as a non-linear function of load torque and armature current; current is common to both the stator and rotor yielding current squared (I^2) behavior.
What mode do DC series motors operate in?
Like AC motors, DC motors also convert electrical energy into mechanical energy. Their operation is the reverse of a DC generator which produces an electric current. Unlike AC motors, DC motors operate on DC power–non-sinusoidal, unidirectional power.
What are the applications of a DC series motor?
Series DC motors are generally used where high starting torque is required, and speed variations are possible. These types of direct connection motors are, for instance, used in the traction system, cranes, air compressors, vacuum cleaners, sewing machines, etc.
What is the characteristics of DC motor?
Generally, three characteristic curves are considered important for DC motors which are, (i) Torque vs. armature current, (ii) Speed vs. armature current and (iii) Speed vs. torque.
What is the characteristics of DC?
The fundamental characteristic of a DC signal is the absence of changes in polarity. If you connect a DC voltage signal to a resistor, the resulting current will always flow in the same direction. The magnitude of the current may exhibit large variations, but the direction does not change.
What is the function of DC motor?
A direct current (DC) motor is a type of electric machine that converts electrical energy into mechanical energy. DC motors take electrical power through direct current, and convert this energy into mechanical rotation.
What is the principle of a motor?
The electric motor works on the principle of magnetic effects of current. Its principle is when a rectangular coil is placed in a magnetic field and current is passed through it, the coil rotates as a result of the forces acting on the coil.
What is the chief advantage of a DC series motor?
The primary advantage of the DC motor is that it can develop constant torque over a wide speed application. Power supply is an important consideration in the application of DC motors. The most common way to provide DC voltage to a motor from an AC line is through the use of an electronic drive.
Why is DC series motor used in crane explain it?
The starting torque of the DC series motor is proportional to the square of the armature current. That is why DC series motor is capable to produce high starting torque, and it is preferred for driving heavy loads. The high inertia loads like cranes need a high starting torque. The DC series motor is used in cranes.
What’s the operating principle of a DC motor?
1 Operating Principle. DC motors operate on Faraday’s principle of electromagnetism which states that a current-carrying conductor experiences a force when placed in a magnetic field. 2 Types of DC Motors. DC motors fall into different categories, depending on their construction. 3 DC Motor Speed Control.
How does a series DC motor convert energy?
A series DC motor converts electric energy to mechanic energy based on the electromagnetic principle. In this type of DC motor, a power supply terminal sits at one end of the armature and field coils. By applying the voltage, power starts in these terminals and passes through armature and field windings.
How does a DC motor work in a magnetic field?
When kept in a magnetic field, a current-carrying conductor gains torque and develops a tendency to move. In short, when electric fields and magnetic fields interact, a mechanical force arises. This is the principle on which the DC motors work. DC motors have a wide range of applications ranging from electric shavers to automobiles.
What are the different types of DC motors?
Mathematically, we can express this force as F = BIL (where F is force, B is the magnetic field, I stand for current, and L is the length of the conductor). DC motors fall into different categories, depending on their construction. The most common types include brushed or brushless, permanent magnet, series, and parallel.