Power semiconductor drives
Wiley, Nov 19, 1984 - Technology & Engineering - 354 pages
This comprehensive guide to the design of electric motor drives and speed and position control systems provides an analysis of the steady-state operation of drive systems that permit the specification of suitable converters and machines for the AC or DC system envisioned. Includes some coverage of transient operation.
10 pages matching pulse-width modulation in this book
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ThreePhase Induction Motors
Speed Control by SlipEnergy Recovery
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acceleration air-gap approximation armature circuit armature current assumed bridge rectifier calculated chopper circuit in Fig commutated controlled rectifier converter current Ia current-source inverter curve dc source deceleration delay angle determine diode diode rectifier discontinuous current drive system energy equation equivalent circuit Example field current field weakening flux frame-size freewheeling friction and windage full-load fundamental component gating signals illustrated in Fig increased induction motor inductor leakage inductance line-to-line load torque loss torque machine motor speed motor terminal pd neglected obtained output per-phase phasor power factor pulse-width modulation quadrant rad/s rated speed rated torque rated value ratio reactance regeneration regenerative braking rms value rotational losses rotor shaft shown in Fig single-phase sinusoidal speed control speed range speed-torque characteristic ßoe stator stator current supply synchronous motor system in Fig three-phase thyristors transfer function variables voltage-source inverter waveform windage losses zero