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The Community of Metros Benchmarking Group (COMET), formerly CoMET and Nova groups, is a multinational collection of metro systems focusing on international benchmarking, facilitated by the Transport Strategy Centre (TSC) at Imperial College London. The Community of Metros consist of 42 metro systems in 39 cities around the world.
A motor controller is a device or group of devices that can coordinate in a predetermined manner the performance of an electric motor. [1] A motor controller might include a manual or automatic means for starting and stopping the motor, selecting forward or reverse rotation, selecting and regulating the speed, regulating or limiting the torque, and protecting against overloads and electrical ...
Bombardier Comet II: 5300–5460 161 trailers (no lavatories) 1982–1989 Rebuilt 1999–2003 by AAI/Alstom; Bombardier Comet IV: 5011–5031 21 cab cars (lavatory) 1996 No door at the engineer's position. 5019 and 5025 are retired. Cab cars are now used exclusively as trailers; 5235–5264 30 trailers (lavatory) 5535–5582 48 trailers (no ...
The Nova family was very popular in the 1970s and ultimately sold tens of thousands of units. The first model, known simply as "Nova", was released in 1969. [1] The Nova was packaged into a single 3U rack-mount case and had enough computing power to handle most simple tasks. The Nova became popular in science laboratories around the world.
In vector control, an AC induction or synchronous motor is controlled under all operating conditions like a separately excited DC motor. [21] That is, the AC motor behaves like a DC motor in which the field flux linkage and armature flux linkage created by the respective field and armature (or torque component) currents are orthogonally aligned such that, when torque is controlled, the field ...
Brushless DC motor controllers are much more complicated than brushed motor controllers. [ 2 ] The correct phase of the current fed to the motor varies with the motor rotation, which is to be taken into account by the ESC: Usually, back EMF from the motor windings is used to detect this rotation, but variations exist that use separate magnetic ...
It was available on the Nova four-cylinder engine, and on the Turbo-Thrift Sixes for Camaro as well as Nova. Despite its low introductory price of US$68.65 ($621 in 2024 dollars [ 3 ] ), most buyers apparently considered the Torque-Drive a nuisance to shift, and for a hundred dollars more they could get fully automatic Powerglide, making Torque ...