Handbook of Small Electric Motors MAZ Part 9 doc

... improvements in flexibility, reliability, and speed. 3.11 BEARING SYSTEMS FOR SMALL ELECTRIC MOTORS* Electric motors are devices that convert electrical energy into magnetic energy and finally into mechanical ... designs. Producing finished stacks of rotor and stator laminations in the die has many advantages to the manufacturers of electric motors, particularly the eliminatio...

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... assemblies, 9. 42 9. 43 computerized, 9. 43 9. 47 dc motors, 9. 9 9. 15 fatigue and lubrication, 9. 36 9. 41 resonance, 9. 27 9. 36 spectral analysis, 9. 15 9. 27 speed-torque curve, 9. 1 9. 5 thermal analysis, 9. 8 INDEX I .9 IEEE: on brush ... 2.51n Magnetizers: capacitive-discharge, 2 .93 –2 .97 , 3.138–3.147 fixtures for, 2 .97 –2 .99 , 3.133–3.137 overview, 2 .91 –2 .93 , 3.124...

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... airflow in 9. 3 compressed airflow in 9. 4 hydraulic discharge in pressurized 9. 9 oil flow in 9. 6 standard dimensions 4. 49 types of materials used for 9. 9 Pitch ... equivalents 9. 16 fan requirements for enclosed equipment 9. 18 liquid temperatures and 9. 15 properties of common liquids 9. 17 thermal capacity 9. 1...

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... slightly smaller than that shown here. ᏼ 9 =µ 0 =µ 0 (1.145) g < r 9 < g + h (1.146) l 9 = r 9 (1.147) dv 9 = 4πr 2 9 dr 9 (1.148) dᏼ 9 =µ 0 =µ 0 2 (1.1 49) ᏼ 9 =µ 0 ͵ g + h g dr 9 (1.150) ᏼ 9 = ... path v 10 ᎏ l 2 10 1 ᎏ 2 4 ᎏ 3 1 ᎏ 4 g ᎏ 2 v 10 ᎏ l 2 10 l 10 ᎏ l 10 a 10 ᎏ l 10 a 10 ᎏ l 10 2 ᎏ π πr 2 9 dr 9 ᎏ π 2 r 2 9 dv 9 ᎏ l 2 9 1 ᎏ 8 π ᎏ 2 v 9 ᎏ l...

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... cos θ+0.467 cos 3θ+1.41 cos 5θ+0 .92 4 cos 7θ − 0.028 cos 9 −0.02 cos 11θ+0.523 cos 13θ+0.0 094 cos 15θ+иии (4 .9) Of course, changing the PM pole arc or magnitudes of the armature and PM mmfs will ... cos θ+0.467 cos 3θ+1.41 cos 5θ+0 .92 4 cos 7θ − 0.028 cos 9 −0.02 cos 11θ+0.523 cos 13θ+0.0 094 cos 15θ+иии (4 .9) Of course, changing the pole arc or magnitudes of the armature and f...

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... 0 .96 0 0.844 4 0 .90 6 0 .95 8 0.837 5 0 .90 4 0 .95 7 0.833 6 0 .90 3 0 .95 6 0.831 ∞ 0 .90 0 0 .95 5 8.270 1 1 ⁄2 0 .91 1 0 .96 0 0.844 All other fractional 0 .90 0 0 .95 5 0.827 slot windings TABLE 5 .9 Summary of ... 0 .92 4 0 .92 4 12 2 Fractional 5 ⁄ 8 1-6 30 1 1.000 0 .96 6 0 .96 6 9 8 Half-pitch 1 1 ⁄8 1-2 40 1 1.000 0 .98 5 0 .98 5 24 4 Integral 1 1-7 15 2 0 .96 6 1.000 0 .96 6...

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... way. Other PM synchronous motors are essentially PM stepper motors run as PSC motors. The motor shown in Fig. 7. 19 has a stator consisting of two sets of coils with the teeth offset from each other ... length of air gap L met = mean end-turn length of coil L s = stator stack length l g = effective length of air gap L t1 = length of teeth L y1 = length of yoke MTL = mean t...

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... on the board of directors of SMMA ( 199 5–present) and EMERF ( 199 7–present). He is the Company Representative and Voting Member of NEMA ( 199 2–present), EMCWA ( 199 2–present) and NAM ( 199 2–present). WARREN ... engineer in 199 1, he received a PhD from the University of Bath, England, in 199 3. He was appointed to the posi- tion of vice president of Vector Fields, Inc., Unite...

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... Electronically Commutated Motors 5.1 5.1. Brushless Direct-Current (BLDC) Motors / 5.1 5.2. Step Motors / 5.47 5.3. Switched-Reluctance Motors / 5 .99 Chapter 6. Alternating-Current Induction Motors 6.1 6.1. ... Commutator Fusing / 3. 79 3.14. Armature and Rotor Balancing / 3.87 3.15. Brush Holders for Small Motors / 3 .99 3.16. Varnish Impregnation / 3.103 3.17. Adhesives /...

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... press shop to have a set of dies for each steel supplier of a given part. This can raise the costs of keeping several steel suppli- ers for one part. Also,the subtleties of producing flat,round ... Hysteresis curves of magnetic material. where σ e = constant based on the quality of the iron, containing an element of resistivity of the material and the material density ∆=thic...

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