â€˜digital SPIN', or dSPIN, combines the digital
control, analog measurement and power electronic circuitry for controlling
stepper motors using ST's BCD fabrication process. It is the first device in
ST's new dSPIN family of monolithic
motor-control ICs. Implementing the motor-control calculations in hardware
simplifies software design by requiring only acceleration, deceleration, speed
and target position commands from the application microcontroller. This frees
microcontroller resources to support other differentiating features.
voltage-mode approach allows full digital control, feeding the motor phases
with an accurate sinusoidal waveform and resulting in position resolution of
128 microsteps per step. Other advantages include reduced resonances,
mechanical noise and low-speed vibration, as well as reduced speed and torque
ripple at low speeds.
has taken advantage of analog integration using its advanced BCD process to
implement rich protection features on the chip. These include over-temperature
protection, low bus voltage protection, non-dissipative over-current protection
and motor stall detection.
Features of dSPIN
Extends ST's PowerSPIN family of motor-control
A middle school team from Rochester, Mich., has again nabbed the grand prize in the annual international Future City Competition, which drew students from 37 regions of the United States, as well as from England and China.
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Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.