Roger Farnworth Railways

[rogerfarnworth]

The Modern Tramway Journal After WW2 and into 1960s
The Modern Tramway – February 1951 – Traction Motor Trends in 1951 – and beyond

The featured image for this article is a line drawing of a drive system from a Hamburg Metro Car, an SKF DT4. [5] … AC traction motors (commonly induction motors) are the standard for modern trams, replacing older DC motors to provide higher efficiency, better reliability, and reduced maintenance. These motors, often running at 60–200 kW, power the bogies and enable regenerative braking to feed energy back into the overhead line. They are controlled by variable-frequency inverters for smooth acceleration.

The Modern Tramway of February 1951 carried an article by ‘Eltee’ entitled ‘Traction Motor Trends’ about the recent changes in electric motors in trams. [1: p33-34]

http://rogerfarnworth.com/2026/05/12/the...nd-beyond/