Handbook of Small Electric Motors MAZ Part 13 pps

... area of secondary tooth B = coil span B t1 = density of primary tooth B t2 = density of secondary tooth B c1 = density of primary core B c2 = density of secondary core C = total number of series ... 6 .13 the stationary axis q is in the same direction as the assumed positive direction of mmf a , whereas the assumed positive direction of the d axis is the negative of the pos...

Ngày tải lên: 11/08/2014, 07:23

... Systems for Small Electric Motors / 3.46 3.12. Sleeve Bearings / 3.72 3 .13. Process Control in Commutator Fusing / 3.79 3.14. Armature and Rotor Balancing / 3.87 3.15. Brush Holders for Small Motors ... 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-...

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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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... University. He has worked in sales of servo electric motors at Moog, Inc., and in sales of specialty motors at Doerr Electric. He is currently the vice president of Oven Systems, Inc. ANDREW E. ... associate professor in electrical engineering at the University of Maine. He holds PhD and MS degrees from the University of Illinois. He is a senior member of IEEE and an associ...

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... 10.51n Kirchhoff’s law, 1.16, 1.91 in analysis of dc series motors, 4.14 in analysis of PMDC motors, 4.42 in analysis of single-phase motors, 6 .13, 6.74 in analysis of three-phase motors, 10.107 Kit ... motor constant, 10 .138 –10 .139 phase resistance, 10 .132 , 10 .135 power efficiency, 10 .139 –10.140 speed-torque curve, 10 .133 –10 .138 torque and current profiles, 10....

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... Diodes 6 .132 backward 6 .138 characteristics and applications 6 .136 light-emitting 6 .137 6.242 photo 6 .138 pin 6 .138 Schottky 6 .138 step recovery 6 .138 ... 5.14 polar moments of 2 .13 2.16 Inertia of masses, polar moments of 2 .13 Institute of Electrical and Electronics Engineers (IEEE) 15.2 Ins...

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... result. dᏼ 5 =µ 0 (1 .132 ) g < r 5 < g + h (1 .133 ) da 5 = w dr 5 (1 .134 ) l 5 = r 5 (1 .135 ) ᏼ 5 = 2µ 0 ͵ g + h g dr 5 = 2µ 0 ln ΂΃ (1 .136 ) ᏼ 5 = 2µ 0 ln ΂ 1 + ΃ (1 .137 ) Paths ᏼ 6 and ᏼ 7 . ... steel parts become saturated, the magnetizing force in the steel parts becomes large and the magnetizing force in the air gap becomes small (NI Ӷ NI coil ).The saturation of the st...

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... 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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... (4 .132 ) The angle within TR1 that the arc of radius R as sweeps is θ as = 90°−θ TR1 (4 .133 ) The area of triangle TR1 is A TR1 = (4 .134 ) The area of the slot SEG2 which is in TR1 is A SEG2 = (4 .135 ) R 2 as θ as (0.017453) ᎏᎏ 2 R 2 as ᎏᎏ 2 ... only half of the SEG1 section needs to be calculated. For the triangle TR1, at the bottom of the slot, the angle is half of the tooth...

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... in num- ber of turns. For example, an 8-pole design using 10 turn/coil of 22 AWG would have a K ET value of 0.97.A 2-pole design using 60 turn/coil of 22 AWG would have a K ET value of 0.88. The ... COMMUTATED MOTORS 5.35 From which the number of turns per slot require to produce E max is n s = int ΂΃ (5.42) where once again int (⋅) returns the integer part of its argument...

Ngày tải lên: 11/08/2014, 07:23