Problems of brushless motors applying in electric drives

Abstract

Тhe development of technologies, corrosion resistance, mechanical properties and temperature range of magnetic materials have recently improved significantly. As a result, machines with permanent magnets find a wider distribution in industries with a heavy operating mode, in electric drives of ship mechanisms and devices, in the military field, etc. The cost of rare-earth permanent magnets has decreased by a factor of five over the past two decades, while the corresponding specific magnetizing force has increased by a factor of three, which represents a 15-fold improvement in cost-benefit ratio and is essential for affordability by price. The article is devoted to the study of an electric drive with a brushless motor, as well as the definition of problems that arise in this electric drive and ways to overcome them.