Karry Yu

The main challenges when using a BLDC motor in medical devices are electromagnetic compatibility (EMC), acoustic noise and vibration, thermal management, precise speed and torque control, long-term reliability, sterilization compatibility, and material safety. Unlike general industrial equipment, a medical device must maintain its required function under defined electrical, mechanical, thermal, and environmental conditions, so selecting […]

A BLDC motor driver circuit converts DC electrical power into controlled three-phase current for a brushless DC motor by coordinating rotor-position detection, electronic commutation, PWM voltage control, current regulation, and power-switch protection. In a conventional six-step BLDC system, three Hall sensors identify the rotor’s electrical position, a microcontroller or motor-control IC interprets the Hall pattern,

A magnetic gear pump uses a magnetic coupling to transmit motor torque through a stationary containment barrier, eliminating the rotating shaft seal, while a traditional gear pump normally transfers torque through a mechanical shaft and therefore requires a dynamic seal or other shaft-sealing arrangement. The pumping principle remains fundamentally similar: meshing gears create expanding cavities

The main principle behind a Magnetic Gear Pump is the combination of positive-displacement gear pumping and non-contact magnetic torque transmission. Instead of using a conventional shaft seal to connect the motor to the pumping gears, permanent magnets transfer torque through a sealed containment barrier. As the gears rotate, they create expanding cavities at the inlet

The shape of the permanent magnets has a direct influence on PMSM motors because it determines how magnetic flux is distributed across the air gap. Parameters such as magnet arc width, thickness, curvature, segmentation, and magnetization direction affect average torque, cogging torque, torque ripple, back EMF, efficiency, vibration, and high-speed operating capability. A larger magnet

BLDC Motors are generally a better choice for efficient continuous rotation, compact designs, lower system cost, and applications that do not require extremely precise positioning. Servo motors are better for automation systems requiring accurate position control, high repeatability, fast acceleration, and closed-loop feedback. The key difference is that BLDC describes a motor technology, while servo