Understanding FOC at the drive stage
Field-oriented control regulates motor current and is used in variable-speed brushless motor applications. The operating point, load changes and speed-control requirements of an FFU fan determine how its drive should be configured and evaluated.
Understanding PFC at the input stage
Active power factor correction improves input-side power factor and current waveform. It serves a different purpose from motor control and must be designed around supply conditions, load range and the complete equipment architecture.
Performance figures make sense only in the context of operating conditions.
Read performance in its test context
Power factor, harmonics and efficiency must be read alongside input voltage, load, motor model and test method. Selection should use data for the intended operating conditions rather than applying one measurement to the entire operating range.
Match the drive to the equipment
Rays-Power FFU drives combine FOC and active PFC and connect to the group-control system over RS-485. Motor matching, speed range and protection settings can be reviewed during technical consultation.