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Servo Control of a DC Brush Motor
of the PIC17C42 as a DC brush motor servo controller. It is shown that a PID (Propor-tional, Integral, Differential) control calculation can be performed in less than 200 ms (@16 MHz) allowing control loop sample times in the 2 kHz range. Encoder rates up to 3 MHz are easily handled by the PIC17C42's
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Mathematics of Electronic Motor Control
brush motor, which is a single phase device, generating this is done by a mechanical commutator with brushes. In a brushless DC motor, it must be done by the external controller. Figure 1 shows two kinds of force that are generated by the magnetic field interactions. They are known as the Q (quadrature
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Brushless DC Motors Increase Reliability: Wear-free Direct Drives for Strapping Machine Systems (.pdf)
motor, to guaran-tee a friction-. locked connection between the drive and the subsequent mechanics. The electrical connection was also. customised to fit the application. For the connection between the motor and the controller, the drives are equipped. with a cable harness of between 500 and 700mm
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Architectures for Economical Motion
Motion-control costs have more to do with what's needed to hook up components than with the motor and controller. Over the last 20 years advances in motion control technology centered around more powerful yet less-costly processors in the form of DSPs and CPUs. In addition, the development
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Sinusoidal Commutation of Brushless Motors (.pdf)
This application note includes a complete discussion of brushless motors. Part One is. devoted to an in-depth review of both brush- and brushless motor theory. Part Two. relates brushless commutation using a Galil Motion Controller. Part Three includes. some real-world cases of brushless motor
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Wired 7.09: Best
While DJs spin direct-drive turntables, which have a motor under the platter, audiophiles prefer belt drives, which isolate the needle from motor vibrations and have richer sound quality. The Sondek LP-12 - a touchstone for analog music lovers - features a belt-driven platter, a suspended
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Bicycling With A Boost
for electric bikes outside of Japan, according to Alex Campbell, spokesman for Zapworld.com. In 1996 the company received the first of many patents for its electric motor system. The ZAP (which stands for zero air pollution) power system includes two permanent-magnet, brushed dc motors, a battery
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Making sense of motion networks
to several motors. The central PC could be a software program, a microprocessor, or PLC. An example of a flat motion-control system is a printing press with multiple, servocontrolled spools. Because timing and latency are critical metrics in such a machine, a central controller (often a PC or PLC