Ten Important Facts and Trends in Motor Control:
01
With the continuous progression of technology, integration is steadily dominating the landscape of motor control markets. Brushless DC motors (BLDC) and Permanent Magnet Synchronous Motors (PMSM), spanning various sizes and power densities, are swiftly supplanting traditional brushed AC/DC and AC induction motor configurations.
02
Brushless DC motors/Permanent Magnet Synchronous Motors share an almost identical mechanical structure, differing primarily in their stator winding arrangements. Despite this, both types oppose the motor's magnets with their stators. These motors excel at delivering high torque at low speeds, rendering them highly suitable for servo motor applications.
03
Unlike brushed motors, Brushless DC motors and Permanent Magnet Synchronous Motors operate without the need for brushes and commutators, enhancing their efficiency and reliability.
04
Harnessing software control algorithms instead of brushes and mechanical commutators, Brushless DC motors and Permanent Magnet Synchronous Motors are driven with greater efficiency.
05
Characterized by a straightforward mechanical design, Brushless DC motors and Permanent Magnet Synchronous Motors feature electromagnetic windings on their non-rotating stators, with rotors composed of permanent magnets. The stator, whether internal or external, consistently opposes the magnets. However, while the stator remains stationary, the rotor is the component in perpetual motion (rotation).
06
Available with 1, 2, 3, 4, or 5 phases, Brushless DC motors maintain their brushless essence despite variations in nomenclature and drive algorithms.
07
Certain Brushless DC motors are equipped with sensors to facilitate rotor position detection. Leveraging these sensors (Hall sensors or encoders), software control algorithms aid motor commutation or rotation, especially in instances demanding high-load startup.
08
In scenarios where Brushless DC motors lack rotor position sensors, mathematical models come into play. These models represent sensorless algorithms, with the motor itself functioning as the sensor.
09
Brushless DC motors and Permanent Magnet Synchronous Motors offer substantial systemic advantages over brushed motors. By employing electronic commutation schemes, these motors achieve energy efficiency enhancements ranging from 20% to 30%.
10
The contemporary landscape witnesses a growing demand for variable motor speeds across various products. To accommodate this need, motors necessitate Pulse Width Modulation (PWM) for speed adjustment, thereby enabling precise control over both motor speed and torque, facilitating variable-speed applications.
