What are the advantages of AC motor traction drives over DC motor traction drives?

The primary advantages of AC traction are adhesion levels up to 100\% greater than DC and much higher reliability and reduced maintenance requirements of AC traction motors. The friction coefficient between wheel and rail is usually in the range of . 40 to .

What are the advantages of electric traction system?

The electric traction system is the most efficient of all other traction system such as steam and internal combustion (IC) engine type systems. It offers several benefits over other systems, including quick start and stop, very efficient, pollution-free, easy to handle and easy speed control.

What are the main advantages of AC drives over DC drives?

Advantages of AC and DC Drives:

• They are low cost as well as conventional.
• They need less maintenance in case of AC motors.
• AC motors are commonly available and less expensive. They are lighter in weight in smaller in size as compared to the DC motors.
• High speed due to to no brush and commutation problem.

What are the advantages and disadvantages of electric traction over other types of traction system?

This is non-electric drive mostly used for road transport. Main advantages of the drive are low investment and flexibility of the routs and have the disadvantages of low overload capacity, uneconomical operation, high maintenance cost and short life.

What is DC traction system?

DC traction units Direct current (DC) traction units use direct current drawn from a third rail, fourth rail, ground-level power supply or an overhead line. AC voltage is converted into DC voltage by using a rectifier.

Which traction system is best?

In case of heavy trains that require frequent and rapid accelerations, DC traction motors are better choice as compared AC motors. DC train consumes less energy compared to AC unit for operating same service conditions.

What are the advantage and disadvantage of AC over DC?

(i) The generation of AC is cheaper than that of DC. (ii) When AC is supplied at higher voltages, the transmission losses are small compared to DC transmission. (iii) AC can easily be converted into DC with the help of rectifiers.

What is the difference between 25kV and AC traction system?

The 25 kV is likely converted to a much lower voltage to be applied to the motor control system. A few advantages of the AC traction system over the DC traction system are the lack of commutation brushes to that need to be replaced regularly in DC traction systems.

What are the advantages of AC traction over DC traction?

A few advantages of the AC traction system over the DC traction system are the lack of commutation brushes to that need to be replaced regularly in DC traction systems. Also the AC traction system allows better control of the motor speed (via drive frequency) and load sharing (via current control).

Who are the suppliers of 25 kV traction power system?

There are not many suppliers of this traction system. Dedicated freight Corridor project in India thought meant for heavy haul, but the locomotive has to work in DFC and IR territory, therefore, 2x25kV power supply system is chosen. 25 kV Traction power system was designed, developed and demonstrated all over world by SNCF.

What are the advantages of 25kV voltage system in railway?

Since 25kV voltage system has higher voltage, the higher voltage reduces the current flow through conductor; this reflects to reduce the conductor size. The cost of the conductor gets less. However, there are 7 major advantages for using 25kV voltage system in railway.