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References in periodicals archive ?
The copper loss [P.sub.Cu] and the core loss [P.sub.core] were considered to calculate the inductor loss, and the envelope volume determined by the core dimensions X, Y, Z was also taken into account for the inductor volume.
In this investigation, by increasing the stator slot size from 6mm to 8mm, 14.27% of stator copper loss can be reduced.
Weili Li, from Harbin University of Science and Technology, analyzed the sensitivity of stator copper loss, height of fins and impregnation quality of stator winding based on the thermal field of motors, laying a foundation for motor optimization[23].
The armature resistance increases with speed due to skin effect at low temperature, so the copper loss also increases with speed as shown in Figure.15.
The most significant portion, though, is formed by ERPMSM electrical, in other words, copper losses [], which constitute 55% of the total loss in conditions n = 3500 rpm, [U.sub.DC] = 18.5 [V.sub.DC] and [I.sub.DC] = 35.0 A.
[v.sub.d], [v.sub.q] stator d- and q-axis input voltages [v.sub.od], [v.sub.oq] stator d- and q-axis input voltages [i.sub.d], [i.sub.q] stator d- and q-axis input currents [], [i.sub.qo] stator d- and q-axis airgap currents [i.sub.dc], [i.sub.qc] stator d- and q-axis iron loss currents [R.sub.s] stator phase resistance {R.sub.c] iron losses resistance [[PSI].sub.m] permanent magnet flux [L.sub.d], [L.sub.q] stator d- and q-axis self-inductances [rho] saliency ratio ([L.sub.q]/[L.sub.d]) [[omega].sub.r] mechanical angular velocity [omega] electrical angular velocity T torque p number of pole pairs [P.sub.Cu] copper losses [P.sub.Fe] iron losses [P.sub.L] total electric power losses III.
Another name of copper losses called as power losses which induce due to current losses in the active material like stator and rotor winding or rotor bar and end ring in squirrel cage induction motor, if can be minimized by high conductivity copper material and die casting copper rotor.
Material Loss SRR on 8 x 12 SRR on 8 x 12 SRR Antenna Condition p = 20 mm AMC p =10 mm AMC Negligible Loss 88.5% 87.3% 98.6% Dielectric Loss 74.7% 66.1% 20.2% Copper Loss 81.2% 63.4% 44.0% Dielectric & 68.4% 50.0% 16.1% Copper Loss Dielectric & Copper & 64.4% 37.5% 13.6% Component Loss Table 3.
The loss is mainly copper loss of the armature windings in rated operation state [17], and it will be converted into heat energy.
Thus, total copper loss under full load operating condition is about 145 W (18% of the total output power).