Electric Motors and Drives

INDEX
Note: Page numbers with ‘f ’ denote figures.
A

2-pole motors, concepts, 284—286 4-pole motors, concepts, 142—154, 191-193, 207-209, 284-286 50/60 Hz supplies, 142-154, 159-160, 169-204, 207-209, 255-262, 281-314

a.c. motor drives, motor/drive selection

issues, 349-364

a.c. motors, 39-41, 48, 75, 141-313, 349-364

see also induction motors; permanentmagnet synchronous motors motor/drive selection issues, 349-364 poles, 75, 143, 284-286 a.c. output from a.c.

see also cycloconverters; matrix converters concepts, 64-65 a.c. output from d.c. see also inverters concepts, 59-63, 66-68 a.c. reluctance motors, 110, 282, 286, 311-313

acceleration from rest, 244-246, 354-360 acoustic noise, 19, 23-24, 62, 69, 71, 262-266

concepts, 69, 262-266

inverter-fed induction motor drives, 262

solutions, 69

active front end converters, concepts,

274

air path, 7, 9-11 see also reluctance

air-gap flux density, 11-13, 17-19, 60, 142-162, 229-230

air-gaps, 10-14, 10f, 17-19, 60, 142-162, 178-180, 185-187, 203-204,

229-230 definition, 11

harmonic air-gap field, 178-179 aluminium heatsinks, 70-71 aluminium rotor bars, 154-162
analogue control signals, 126-133 angular distance, work concepts, 22-23, 302-305

anode terminals, 46-47, 50-57 applications

see also individual motors motor/drive selection issues, 349-364 area parameter, air-gap flux densities, 11 -13 armature conductors, 73-112 armature reaction, 14, 93-94, 99-103 armature time-constants, 96-98 autotransformer starter, induction motors, 173

axial current see current

B

see magnetic flux density; tesla definition, 4-5, 20-21, 36 back e.m.f., 28, 83-108, 115-117, 187-193, 287-292 see also motional e.m.f. definition, 28, 83-84 ‘bang-bang’ flux and torque control, 248-253

bar magnets, 1-7, 2f base speed, 73-75, 91-93, 104-106, 132, 209-215, 296-298, 343-347, 351-354

d.c. motors, 73-75, 91-93, 104-106, 132

definition, 91-93, 132 synchronous motors, 296-298 batteries, 34-35, 38, 41-50, 99-103, 133-136

voltage control, 41-50 bearing currents, inverter-fed induction motor drives, 264-265 bearings, 17, 307-308

bi-directional energy converter concept, 36 BIl force equation, 6, 15, 17-18, 23-28, 36, 111, 159-160, 287, 293, 305, 315, 320-325, 344

bipolar junction transistor (BJT), 43—44, 67, 334-336 see also inverters circuit symbols, 67 concepts, 43-44, 67 definition, 43-44, 67 BJT see bipolar junction transistor boost converters, 48-50, 133-136 braking force, 26-28, 83, 87-91,

99-103, 121-124, 132, 187-195, 272-273, 339-343, 360-364 dynamic braking, 103, 272-273 energy conversion, 26-28, 83,

87-91

full-speed regenerative reversals, 101-103, 121-124, 193-195 induction motors, 187-195, 213-215, 272-273

inverter-fed induction motor drives, 272-273

regenerative braking, 99-103,

121-124, 132, 187-195, 360-364 brushed d.c. motors, 2, 73-112,

141-142, 281-282, 349-350, 350f, 352f

see also d.c. motors concepts, 73-112, 349-350 definition, 76 structure, 73-76

brushes, 2, 73-112, 141-142, 281-282, 349-350, 350f-352f see also commutators concepts, 73-111, 281-282, 349-350 definition, 76 servicing requirements, 76 structure, 73-75

brushless a.c. motors see permanent-magnet synchronous motors brushless d.c. motors

see also permanent-magnet synchronous motors

definition, 281-282, 305 brushless motors, 139, 281-313

see also permanent-magnet synchronous motors

brushless permanent-magnet synchronous motors see permanent-magnet synchronous motors
buck converters, 48-50, 133-136 see also step-down converters definition, 48

C

C-core magnetic circuits, evolution, 14, 15f cable problems, inverter-fed induction motor drives, 262-263 cage rotors, 154-162, 165-167, 169-204, 224-225, 282-286, 291-292,

312-313 see also rotors

concepts, 154-162, 169-176, 181-195, 200-201, 224-225, 291-292 definition, 155-156

capacitor run induction motors, 201-202 capacitors, 48-50, 56-57, 201-202 chopper circuits

concepts, 41f, 42-45, 113, 126-136, 249, 350f

definition, 42 inductive loads, 45-48 overvoltage protection, 45-48,

272-273

chopper drives, stepping motors, 249, 337-338

chopper-fed d.c. drives, 113, 126-136, 350f see also d.c. motor drives concepts, 133-136, 350f control systems, 126-133, 136 performance calculations, 133-135 torque-speed characteristics, 135-136 Clarke transformation, 220-222 class F insulation, 37 closed-loop control systems, concepts,

33, 39-41, 96, 113-133, 136,

138-139, 174-176, 205-206,

240-243, 258-262, 330, 341-343 closed-loop induction motor drives, 260-261

closed-loop permanent magnet motors,

259

clutches, 172

cogging effects, torque ripple, 308-310 coils of wire, 3-4, 7-14, 8f, 73-75, 78-84, 142-154, 203-204, 321-322 see also magnetomotive force; number of turns