Page 304 - Electric Drives and Electromechanical Systems

Index 303

Open-loop Planetary gearbox, 78e80, 78f
control, 221e222 Platform as a Service (PaaS), 283
estimators, 203e204 PLCs. See Programmable logic controllers
transfer function, 245 (PLCs)
Operator terminals, 278 Plugging region, 191
Optical position sensors, 126e130 PM field. See Permanent magnet field (PM
binary and grey codes, 127t field)
direction decoding for incremental Pneumatic actuators, 21, 228
encoder, 128f Point-to-point system, 52e54
encoder output frequencies, 129f Polar robots, 13
linear optical encoder using transmissive Polarisation, 232
scale, 130f Position transducers, 108, 119e130
optical linear encoders, 129f brushed potentiometers, 119
rotary optical encoders, 126f Inductosyn, 124e126
Optimal industrial operations, 282e283 installation considerations for, 130e133
Optimum gear ratio, 44, 45be46b determination of datum position,
ORCAD, 253 132e133
Ordinance and explosive disposal systems, 22 electrical interconnection, 132
Original equipment manufacturer (OEM), mechanical installation, 130e132
241e242, 259 LVDT, 119e121
OSI model. See Open Systems optical position sensors, 126e130
Interconnection model (OSI model) performance of measurement systems,
Outage, 61 108e116
Overvoltage, 61 A/D and D/A conversion errors,
114e115
P digital-system errors, 112e114
PaaS. See Platform as a Service (PaaS) dynamic performance, 115
Parallel axis theorem, 39e42, 45e46 errors introduced by process, 115e116
Peak torque, 98, 231 random errors, 110e111
Peak-current capability, 156 systematic errors, 111e112
Permanent magnet field (PM field), resolvers, 121e124
139e140 Positional error, 216
Permanent-magnet brushless motors, 166 Power, 138e139
Permanent-magnet rotor, 135 bridge, 154e156
Phase motor currents, 198e199 loss, 190e191
Phase-equivalent circuit, 188e189 semiconductors, 146
Physical layer, 276 Power transmission and sizing
PID controller. See Proportional, Integral, bearings, 88e93
Definitive controller (PID controller) belt drives, 85e88
Piezoelectric crystals, 233 couplings, 93e95
Piezoelectric effect, 232 gearboxes, 74e82
Piezoelectric motors, 232e233 lead and ball screws, 82e85
characteristic of, 233f linear drive considerations, 97e98
operating principles of, 234f motor-drive sizing, 98e106
Planetary exploration systems, 22 shafts, 95e97