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Improve motor precision, power efficiency

Posted: 04 Aug 2010     Print Version  Bookmark and Share

Keywords:motor precision  MCU integration  power efficiency 

For decades, the majority of motor control applications have relied upon universal, brushed DC and stepper motors given their low cost and simplicity of implementation. Continued innovation and integration of microcontroller (MCU) architectures, however, enable today's developers to cost-effectively improve motor precision, performance, power efficiency, and motor life through the use of more complex—and more intelligent—motor types and control mechanisms.

AC Induction (ACI) motors are well-suited for a wide range of high-performance applications, including white goods, pumps, fans and compressors (i.e. refrigerators and HVAC systems). ACI motors are asynchronous in operation since the motor's internal stator and rotor, controlled by varying current, rotate at different speeds. Offering excellent speed and torque control, ACI is robust, efficient at high speeds and low cost. The primary disadvantage of ACI is the need for complex feedback and control mechanisms to hold efficiency across variable and lower speeds.

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