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New Cars, Car Reviews & Prices, Used Cars for Sale, & Auto Shows at Motor Trend Magazine (961 words) |
 | Diesel fans are going to have to hold out a little longer for the return of Volkswagen's Jetta TDI in the U.S. According to an E-mail from VW execs to their North American dealer network that was posted on the TDIClub... |
| • 2008 Motor Trend COTY Contender: Cadillac CTS |
| Motor Trend editor-in-chief Angus MacKenzie settles in behind the wheel of the 2008 Mercedes-Benz C6... |
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Jones on Stepping Motors (740 words) |
| Typically, all windings in the motor are part of the stator, and the rotor is either a permanent magnet or, in the case of variable reluctance motors, a toothed block of some magnetically soft material. |
| All of the commutation must be handled externally by the motor controller, and typically, the motors and controllers are designed so that the motor may be held in any fixed position as well as being rotated one way or the other. |
| For example, the repeatability of positioning done with a stepping motor depends on the geometry of the motor rotor, while the repeatability of positioning done with a servomotor generally depends on the stability of the potentiometer and other analog components in the feedback circuit. |
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