Physical and Technical Energy Problems

Abstract

The paper presents an overview of brushless electric motors used in hand electric tools and household appliances. Analysis of the motor types has shown that synchronous reluctance motors are the most reliable for lowpower drives of such tools and appliances due to their simple design, long service life and low cost of production. Solutions are proposed for significant decrease in the quadrature-axis magnetic flux of the synchronous reluctance motor. The motors are shown to develop the specific electromagnetic torque up to 0.35÷0.4 Nm/kg.

Design of Low-Torque-Ripple Synchronous Reluctance Motor with External Rotor

“…Most studies are devoted to the determination and justification of the rational design of reluctance motor with high electromagnetic torque, where the goal is achieved by solving such a problem as a reduction of the magnetic flux in the quadrature axis (qaxis) and an increase in the direct axis (d-axis). For example, results obtained in paper [1] show that direct magnetic flux should be increased, but quadrature magnetic flux should be reduced. The fact that one of the ways to increase the electromagnetic torque is the simultaneous execution of synchronous reluctance motor as a two-pole motor (2p = 2) is also presented in paper [1].…”

“…For example, results obtained in paper [1] show that direct magnetic flux should be increased, but quadrature magnetic flux should be reduced. The fact that one of the ways to increase the electromagnetic torque is the simultaneous execution of synchronous reluctance motor as a two-pole motor (2p = 2) is also presented in paper [1].…”

“…Many recent studies [1]- [6] present a variety of new designs of synchronous reluctance motors and techniques for improving the existing motor designs. Most studies are devoted to the determination and justification of the rational design of reluctance motor with high electromagnetic torque, where the goal is achieved by solving such a problem as a reduction of the magnetic flux in the quadrature axis (qaxis) and an increase in the direct axis (d-axis).…”