BrushLess DC (BLDC) motor

A DC brush type motor has a permanent magnet stator and a wound rotor. The configuration of a brushless motor is reversed, i.e. a permanent magnet rotor and a wound stator. Furthermore, there are two types of brushless motors; the type that has an outer rotating magnet or the type that has an inner rotating magnet assembly. In a brushless DC motor the position of the coils (phases), with respect to the permanent magnet field, are sensed and the current switched electronically (commutated) to the appropriate phases. Hall Effect sensors are typically used to sense the rotor position. Otherwise, sensorless techniques are used.

Applications include compressors, pumps, fans, dishwashers, washing machines, door openers, HVAC systems.

See detailed circuit diagrams below and device recommendations.

 

3 Phase Motor Control

 

Recommended Microcontrollers	Description
78K0 Motor ASSP	20 MHz 8-bit motor control ASSP with dedicated motor control peripherals
V850ES/IE2	20MHz 32-bit motor control ASSP with dedicated inverter control peripherals 3-phase sensorless vector control SW library available
V850ES/IK1	32MHz 32-bit motor control ASSP with dedicated inverter control peripherals with up to 128K Flash
V850E/IA1, V850E/IA2, V850E/IA3, V850E/IA4	Up to 64MHz 32-bit motor control ASSP with dedicated inverter control peripherals with up to 256K Flash memory and CAN interfaces.
V850E/MA3	80MHz 32-bit motor control ASSP with dedicated inverter control peripherals with up to 512K Flash plus SDRAM controller and IIC interface