Epicyclic drive in trams

Epicyclic Drive in Trams

Epicyclic Drive in Trams


Trams are an important mode of transportation in urban areas, and the epicyclic drive is a crucial component in their operation. This blog post will explain how the epicyclic drive works in trams and its advantages.

What is an Epicyclic Drive?

An epicyclic drive, also known as a planetary gearbox, is a type of gearing system consisting of one or more outer gears, or planet gears, revolving around a central, or sun gear. This gearing system is used to transfer torque and power from an input shaft, such as an electric motor, to an output shaft, such as the wheels of a tram.

The Structure of an Epicyclic Drive

The epicyclic drive consists of several components including the sun gear, the planet gears, the ring gear, and the carrier. The sun gear is located at the center and provides input to the system. The planet gears revolve around the sun gear and are connected to the carrier, which in turn is connected to the output shaft. The ring gear is located on the outside of the system and meshes with the planet gears, causing them to rotate around the sun gear.

Advantages of Epicyclic Drive in Trams

The epicyclic drive has several advantages over other types of gearing systems in trams, including:

  • High efficiency and accuracy
  • Compact size and weight
  • High power density
  • Quiet operation
  • Low maintenance and long service life

Applications of Epicyclic Drive in Trams

The epicyclic drive is widely used in trams and other light rail vehicles as it provides smooth and reliable power transmission. It is used in the propulsion system of the tram, transferring power from the electric motor to the wheels. It is also used in the braking system, providing effective brake torque to slow down or stop the tram.


The epicyclic drive is a vital component in the operation of trams, providing efficient and reliable power transmission. Its advantages, including high efficiency, compact size, and low maintenance, make it an ideal choice for tram systems.

Epicyclic Drive in Use

The epicyclic drive is widely used in trams due to its high efficiency, compact size, and low maintenance. It provides smooth and reliable power transmission, making it an ideal choice for tram systems.

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Author: Czh