The current limit circuit (see diagram) compares this voltage to an adjustable negative voltage using an op-amp wired as a comparator – unlike many op-amps, LM324 op-amps can be used as comparators ...

The trick, apparently, is to measure the internal dc resistance of the motor – ether with an ohm meter, or though applying a low voltage to the motor, stalling it, then measuring the current. Add a ...

Read part 1 of this series on construction and operating principles here.. Having understood the construction and basic operating principle of BLDC motor in the first part of this article, it becomes ...

Running a brushed motor in muddy or dusty environments takes a toll on controllers, with both heavy back EMF and high stall currents. This explains one of the challenge in Europe’s Hacky Race… ...

2nd course in the Embedding Sensors and Motors Specialization. Instructors: Jay Mendelson, MSME, Lecturer & James Zweighaft, MSME. Note: This specialization requires purchase of a hardware kit in ...