768 cars were ordered built by metro cammell now alstom transportation and were refurbished starting in 1998 by the australian company united goninan. The motors position can then be commanded to move and hold at one of these steps without any position sensor for feedback an open loop controller as long as the motor is carefully sized to the application in respect to torque and speed.
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The metro cammell emu also known as m train is the oldest variation of electric multiple unit that operates on the mtr rapid transit railway system in hong kong.
Dc motor specifications wikipedia. A stepper motor also known as step motor or stepping motor is a brushless dc electric motor that divides a full rotation into a number of equal steps.
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