In order to study the method for reducing losses in cryogenic permanent magnet motors LNG pumps, design of a submersible brushless DC motor is presented this paper. First, materials used were tested at room temperature and low temperature, BH curve BP silicon-steel sheet obtained. Next, power supply PWM analyze influence power-supply mode on loss. Finally, based calculation results loss, abilit...

In a conventional three phase Brushless DC machine with 120° electrical conduction, Harmonics and commutation torque ripple occurs because of changeover of load current from one phase to another at every 60 electrical degrees. This paper presents techniques for diminishing the harmonics and torque ripples in sensor Brushless DC motor. This torque ripple reduction techniques based on voltage con...

Minnesota Micromotors, Inc. (MM), based in Minneapolis, was a manufacturer of brushless, direct current (BLDC)1 motors used in orthopedic medical devices. Devices utilizing MM’s motors were typically used by orthopedic surgeons in large bone surgery, reconstructive surgery, trauma surgery, and sports medicine procedures. MM sold approximately 97,000 motors a year and had a 9% share of the $137 ...