The DC motor works because, simply put, when a current is passed through the motor circuit, there is a reaction between the current in the field and the current in the armature which causes the armature to turn. The armature and the field are connected in series and the whole motor is referred to as “series wound”.
Why DC motor is used in traction?
In case of dc series motors, up to the point of magnetic saturation, torque developed is proportional to the square of the armature current. Therefore, dc series motor requires comparatively less increased power input with the increase in load torque. Thus the series motors are capable of withstanding excessive loads.
What type of DC motor is used in traction system?
The motors used are induction or asynchronous motors designed to have characteristics suitable for traction. The speed and torque of the motor are controlled by varying the frequency, voltage and current applied to the stator coils. Motors for a typical locomotive would be in the range 400 to 600 kW.
What is the function of traction motor?
A traction motor is used to make rotation torque on a machine. It is usually changed into a straight line motion. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives.
Which motor is used in tramway?
Dc motor (Ma) and induction motor (Mc) are currently manufactured and used in 105 N tram drive, their parameters are available. Dc motor (Mb), brushless motor (Me) and slip-ring motor (Md) pa- rameters have been determined by analysis.
Which motor is used as traction motor?
DC series motor is best suited for DC traction, cranes as it provides high starting torque and easy speed control which is primary requirement of DC traction.
Which motor is preferred the most for traction purpose Why?
Why are the DC motors preferred for traction applications? Explanation: DC motors are used for traction as, according to the characteristics of DC motors speed is inversely proportional to torque and square of armature current as well, if linear magnetization is concerned.
Which motor is used in railway traction?
Traditionally, these were series-wound brushed DC motors, usually running on approximately 600 volts. The availability of high-powered semiconductors (thyristors and the IGBT) has now made practical the use of much simpler, higher-reliability AC induction motors known as asynchronous traction motors.
What are the general features of traction motor?
The ideal characteristics of an electric motor drive for traction application in an electric and hybrid electric vehicle are high torque at low speed region for fast acceleration, hill climbing and obstacle negotiation, and low torque at high speed for normal driving.
What are requirements of traction motor?
General requirements of Traction motors / traction system
- High starting torque. A traction motor must have high starting torque. …
- Simple speed control – …
- Suitable speed Torque Characteristics – …
- Parallel Running – …
- Overload Capacity – …
- Size of Motor – …
- high Efficiency. …
- Braking –
Which motor is more suitable for traction service?
DC Series motor speed-torque characteristics are such that as torque increases speed decreases. DC series motor has develops high torque at low speeds, low torque at high speed, this is the basic requirement of traction unit. Commutating property of series motor is good so we get sparkles commutation.
Which motor is powerful AC or DC?
AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy.
Does Tesla use DC or AC motors?
Tesla, for example, uses alternating current (AC) induction motors in the Model S but uses permanent-magnet direct current (DC) motors in its Model 3. There are upsides to both types of motor, but generally, induction motors are somewhat less efficient than permanent-magnet motors at full load.