Design and manufacturing of a single-phase induction motor: A decision aid tool approach

Abstract

Summary This paper presents a simple, practical, and effective design, analysis, and selection approach of a capacitor‐run single phase induction motor as a manufacturing aid tool at the early stage of the design. The standard industrial motor frame sizes as well as the current design trends of larger lengths and smaller diameters—which are not likely presented in literature—are taken into account. At first, to verify the proposed approach, a sample single phase induction motor design is obtained regarding certain requirements, based mainly on the classic output coefficient concept. Then, numerous simulations over a large number of candidate motor topologies are conducted. This series of investigations is performed initially with respect to (1) certain operational industrial criteria, (2) the number of stator and rotor slots, and (3) the rotor cage material. After the relevant results are presented and commented, a selection strategy of an appropriate design is also proposed. Also, the effect of the running capacitor value is examined. It is seen that the total design and selection procedure are verified very satisfactorily. Finally, useful conclusions from a manufacturer's point of view are also extracted, dealing with important operational characteristics of the motor, such as power factor, winding currents phase shift, total losses, starting/rated torque ratio, efficiency, and other.

A novel design methodology for the compliance of single phase induction motors with recent industrial premium efficiency standards

“…It was mentioned that the preliminary results of an author's recent work 31 indicated that the increment of the SPIM's axial effective length benefits the motor's efficiency toward IE3 standards. However, the improved efficiency has to be combined with the satisfaction of many other requirements (eg, adequate starting torque, low starting current, current density, and so on) aiming the SPIMs to comply with the latest international industrial standards.…”

“…They claim that their efficiency cannot be enhanced over the ordinary ratings and thus it will be difficult for them to exhibit an efficiency of IE3 according to the latest industrial standards 30 . On the other hand, the preliminary results of an authors' recent research effort (ie, Reference 31) indicate that the capacitor‐run SPIM's axial effective length increment along with the incorporation of die‐cast copper squirrel‐cages benefits its efficiency toward IE3. The SPIMs topologies (developed in Reference 31) presented the desirable efficiency, but not adequate starting torque.…”

“…On the other hand, the preliminary results of an authors' recent research effort (ie, Reference 31) indicate that the capacitor‐run SPIM's axial effective length increment along with the incorporation of die‐cast copper squirrel‐cages benefits its efficiency toward IE3. The SPIMs topologies (developed in Reference 31) presented the desirable efficiency, but not adequate starting torque. Also, in that work great emphasis has been given to the impact of rotor bars number, squirrel‐cage material and capacitor value on the SPIM performance.…”

Optimal Selection of Rotor Bar Number for Minimizing Torque and Current Pulsations Due to Rotor Slot Harmonics in Three-Phase Cage Induction Motors

“…In the case when the number of rotor bars is a divisor of 2p(mz+1), lower RSHs exist in the stator current spectrum at frequencies given by (9) and associated lower pulsating torque components at frequencies given by (11).…”

Single‐phase direct‐on‐line synchronous motor for a specific application in comparison with an induction motor

“…A centrifugal switch (S) is arranged to remove this capacitor once the machine attains full speed. A run capacitor (usually of less value than the start capacitor) is left in the auxiliary winding, as it allows the motor to develop higher running torque, greater efficiency, and improved power factor . The specifications of the machine to be studied are given in Table .…”