Page 305 - Electric Drives and Electromechanical Systems

304 Index

Power-electronics integration techniques, Q
173e174 Quality of service (QoS), 282e283
Prehensile movement, 19 Quartz (SiO 2 ), 232
Preventative measures, 70
Printed-circuit motors, 140e143, 142t R
brushed pancake motors, 142f Radio-frequency interference (RFI), 59e60,
Process Field Bus (PROFIBUS), 279e280 138, 167
Process machine, 2 RAM. See Random-access memory (RAM)
PROFIBUS. See Process Field Bus Random errors, 110e111
(PROFIBUS) Gaussian distribution, 111f
Programmable automation systems, 2 effect of resolution, 110f
Programmable logic controllers (PLCs), 242, Random-access memory (RAM), 258
260e270, 272 RDC. See Resolve-to-digital converters
combinational logic programming, (RDC)
264e267 Regeneration, 157e162
internal structure, 262f armature current, 158f
manufacturing cell, 262f motor’s speed, 158f
sequential-logic programming, regenerative energy as function of
267e270 armature current, 159f
Programmable read-only memory (PROM), region, 191
181e182, 258, 261e263 single-phase power supply, 161f
Proportional, Integral, Definitive controller terminal voltage, 158f
(PID controller), 253 Regulator, 160e162
PSpice, 253 Reluctance machine, 235
Pull-out torque, 218e219 Remote Transmission Request (RTR), 279
Pulse-width modulation (PWM), 145, 176, Repeatability, 109
195e196 Resolution, 109
amplifiers, 151e156 Resolve-to-digital converters (RDC), 122
analogue stage, 156f Resolvers, 121e124, 175e176, 181e182
2
characteristics of I t current fold back anti-backlash gearing, 124f
circuit, 157f conventional housed, 121f
commercial analogue, 152f digital resolution, 123t
equivalent circuit, 149f resolver-to-digital converter, 123f
logic stage of analogue amplifier, 155f Reverse engineering techniques, 10e11
principle of current-controlled RFI. See Radio-frequency interference (RFI)
hysteresis, 153f Ring networks, 276
principles of sub-harmonic PWM Risk, 65e71
system, 154f assessment, 65e66, 69e70
servo drives, 145e147 of software, 70
bipolar switching, 146t Robot, 3
four quadrant power bridge, 145f control system, 15e16
limited unipolar operation, 147t controller, 15
unipolar switching, 146t positional information, 17e18
switching waveform, 176 Robotic(s), 12e25, 16fe17f
PWM. See Pulse-width modulation (PWM) applications, 32