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Optimal Design of 1 Phase Linear Oscillatory PM Motor Series for Small Compressor Like Drives: With FEM and Self-Starting Transients Validation

2018; Taylor & Francis; Volume: 46; Issue: 1 Linguagem: Inglês

10.1080/15325008.2018.1431820

1532-5016

Lucian Tutelea, Ana Popa, Tiago Staudt, A. A. de Espíndola, Ion Boldea,

Electric Motor Design and Analysis

Refrigerator compressors are currently driven mostly by rotary line start or variable-speed (inverter-fed) motors with mechanical transmission. Direct driving of pistons by linear oscillatory resonant PM 1 phase motors has just been introduced to low power (less than 100 W) such applications. The present paper introduces a 3 pole PM mover 1 phase PM linear oscillatory motors, in terms of optimal nonlinear analytical design methodology, with FEM and dynamics validation. Both 50 and 250 Hz (inverter fed) operation for 2000 and 100 W is exemplified for minimum active materials costs and, respectively, minimum global costs (losses capitalized cost is added). For the line start case study (at 2000 W, 50 Hz) a circuit model for transients is introduced and the motor self-starting transients with full power delivery at above 91% efficiency is available. The 50 Hz motors are heavier around (5.7 kg/kW at 2000 W and 7.5 kg/kW at 100 W, respectively) than the 250 Hz motors around (1.2 kg/kW, 3 kg/kW) but the latter require inverter control.