Increasing torque in BLDC motors through improved magnetic sensing

April 20, 2012 // By Roland Einspieler
Across a range of automotive and industrial applications, brushless DC (BLDC) motors (also known as electronically commutated motors) offer many advantages over other types of DC motor, and are now very widely used.

In a standard motor control circuit, speed regulation, acceleration and position control are normal, well understood functions. But in BLDC motor control systems it is also possible, through use of an intelligent magnetic Hall encoder, to implement precise control of torque at start-up and in high-speed operation. Effective torque control provides for more efficient operation and eliminates juddering and other unwanted mechanical effects that are caused by torque ripple. This article describes an important development in the implementation of magnetic sensing which brings even more refined control of torque at high speeds.

Read the full article on page 24 of our April digital edition.