This Trainer comprises a Firing & Bridges panel, a Motor Control Circuits panel, a Three Phase Supply Panel, SCR & Diodes Panel, and all of the loads, instrumentation, etc to enable the study of the principles of Single and Three Phase rectification applied to passive loads and to apply these thyristor circuits to the control of dc motors.
Curriculum Coverage
In addition to all of the work covered by the Thyristor Control Principles trainer, the Thyristor and Motor Control trainer enables the study of dc motor control. Motor speed and current control circuits may be investigated with various types of feedback, including PI control and 4 Quadrant control. Zero crossing and burst firing circuits are also covered. The range of assignment work that can be carried out with the trainer includes:
Uncontrolled Rectification Circuits
- Single Phase half wave
- Single Phase full wave
- Three Phase half wave
- Three Phase full wave
Controlled Rectification Circuits
- Single Phase half wave
- Single Phase full wave
- Three Phase half wave, Star connected supply
- Three Phase full wave, full controlled bridge
Output from the various converters are measured for average and rms values in conjunction with the various RLC load combinations.
Basic Firing Circuits
- firing circuit requirements
Basic Motor Control
- Single Phase full wave, uncontrolled bridge
- Single Phase full wave, controlled bridge
- the flywheel diode
Advanced Firing Circuits
- thyristor phasing
- multipurpose firing circuits
Advanced Motor Control
- feedback measurement
- full wave controlled bridge with speed feedback
- PI control
- full wave controlled bridge with armature voltage feedback
- full wave controlled bridge with VI feedback
4 Quadrant Control
- dual converter - Single Phase
- dual converter - Three Phase
- converter selection by control signal
- converter selection by load current
- converter selection by control signal & load current
- continuous & discontinuous current operation
- bi-directional speed & current control
- bi-directional control time behaviour
- regenerative braking
- effects of inertia on system performance
ac Power Control
- Single Phase ac control
- Three Phase ac control
- burst fire control
Equipment List
- Three Phase Supply
- dc Shunt Machine
- Variable Resistive Load 200 Ohms
- Switched 3 Phase Resistive Load
- Switched Capacitive Load
- Variable Inductive Load 700mH
- Inertia Load
- Friction Brake
- Moving Iron Voltmeter & Ammeter
- ac/dc Digital Voltmeter/Ammeter
- dc Tachogenerator
- Optical/Contact Tachometer
- 4mm Patch Lead Set
- 5 Way DIN-DIN Lead
- SCR & Diodes
- Firing Circuits & Bridges
- Motor Control Circuits
- System Frame
- Oscilloscope/Computer Housing
- Lead Storage Bin
This panel provides at its outputs the working supplies for the power devices on the Firing Circuits and Bridges panel. Three transformers, one for each Phase, are used to provide Three Phase outputs of 200VA for each Phase or they can be combined to produce a Single Phase output of 600VA.