Motor Drives

Model No. DL PEL205

The DL PEL205 is a multipurpose bench for AC and DC motor drives where power electronics converters are studied as interfaces between input power and motors to control speed and position. The trainer is dedicated to the study of different types of machine drives: DC motor drives, AC slip-ring motor drives, and AC squirrel cage motor drives, all of them with speed control. Its modular structure makes it easy to reconfigure the system to perform several experiments in various subjects such as single-phase full-bridge DC chopper/inverter (square wave or sine wave with PWM control), and frequency converter, to name a few.

EXPERIMENTS:

DC MOTOR DRIVE
DC motor drive by single-phase rectifiers
– Single-quadrant drive with 1-ph controlled rectifier
– Single-quadrant drive with 1-ph controlled rectifier for closed loop armature voltage control
– Single-quadrant drive with 1-ph controlled rectifier for closed loop armature voltage control with feedforward
– Single-quadrant drive with 1-ph controlled rectifier for single closed loop speed control
– Single-quadrant drive with 1-ph controlled rectifier for dual closed loop speed control
– Two-quadrant drive (I-IV) with 1-ph controlled rectifier
– Two-quadrant drive (I-III) with 1-ph controlled rectifier
– Two-quadrant drive (I-III) with 1-ph controlled rectifier for dual closed-loop speed control
– Four-quadrant drive with 1-ph controlled rectifier
– Four-quadrant drive with 1-ph controlled rectifier for dual closed-loop speed control
DC motor drive by three-phase rectifiers
– Single-quadrant drive with 3-ph controlled rectifier
– Single-quadrant drive with 3-ph controlled rectifier for dual closed-loop speed control

CONSTANT FREQUENCY DRIVE – SLIP RING MOTOR
Stator voltage control
– Stator voltage control with a variac
– Stator voltage control with AC voltage controller
– Speed control by stator voltage control with AC voltage controller
Rotor resistance control
– Rotor resistance control with rheostat
– Rotor resistance control with pulsed resistor
– Speed control by rotor resistance control with a pulsed resistor
– Rotor resistance control with Scherbius static drive
– Speed control by rotor resistance control with Scherbius static drive

VARIABLE FREQUENCY DRIVE – SQUIRREL CAGE MOTOR
Frequency converter
– Operation of the frequency converter
– Input-controlled rectifier
– Output inverter
– DC link brake chopper
Squirrel cage motor
– Preliminary investigation of the squirrel cage motor
Modulation methods of frequency converter
– Six-step modulation
– Square wave PWM
– Trapezoidal wave PWM
– Sinusoidal wave PWM (SPWM)
– Space vector PWM (SVPWM)
Induction motor control following U/f characteristic
– Motor magnetization for linear U/f characteristic
– Extra start magnetization
– IxR compensation
– Operation in standard converter setting
– Scaled-down operation in star connection
Speed control
– Slip compensation
– Closed loop speed control

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