MCUs enable precise BLDC motor control

23rd April 2015
Barney Scott

Renesas has introduced the RX23T Group of MCUs, designed for building inverter control systems to enable precise control of inverter circuits, for applications such as DC motor control in energy-efficient electric home appliances, industrial machinery, and office equipment. MCU functions are optimised for inverter drive control, including an on-chip FPU that reduces code size and development time by 30%.

The MCUs suit use in appliances such as refrigerators, air conditioners, washing machines, vacuum cleaners, and fans; entry-level to mid-range industrial equipment such as general-purpose inverters, electrical tools, and drones; and office equipment.

Energy efficiency regulations have become stricter in many countries in recent years, expanding to include entry-level and mid-range energy-efficient electric home appliances and industrial equipment. System designers in these price-competitive markets are looking for different approaches to achieve the reduced power consumption desired within increasingly constrained budget requirements for energy-efficient, cost-attractive products.

The demand for more compact, more efficient, quieter motors in office equipment such as printers and multifunction units has led to a move away from stepping motors and toward the adoption of brushless DC motors. There is a need for more precise position control without increased system cost.

To respond to these market demands for improved energy efficiency, more precise control, and lower development cost, Renesas has developed the RX23T Group of MCUs, offering an excellent cost-to-performance ratio. The MCUs provide an optimised subset of the functions of the RX62T Group, which has a proven track record in the inverter control field, designed specifically for use in three-phase inverter drive applications.

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