Power Semiconductor DrivesThis 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. |
Contents
Variable Speed Drive Systems | 1 |
30 | 47 |
Chopper Drives | 127 |
Copyright | |
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acceleration air-gap approximate armature circuit armature current breakdown torque chopper circuit in Fig commutation controlled rectifier converter current-source inverter curves dc source delay angle determine diode rectifier equivalent circuit Example field current field weakening flux freewheeling friction and windage full-load fundamental component gating signals illustrated in Fig induction motor inductor leakage inductance line-to-line load torque machine maximum motor line current motor terminal pd obtained output per-phase phasor power factor pulse-width modulation Q₁ Q₂ quadrant R₁ rad/s rated operation rated speed rated value ratio regenerative braking rms value rotational losses rotor shown in Fig sinusoidal speed control speed range squirrel-cage motor stator current steady-state supply synchronous motor system in Fig three-phase thyristors transfer function V₁ variables voltage-source inverter w₁ waveform windage losses zero π 2π Зп