09/02/23 11:04:41
@lecture @IS @py7002
- Three topics for assingment
- Generators, wind turbines, methods of control. AS generator for a changing wind velocity, phase required for grid.
- Motors for electric cars. Catering for all driving conditions.
- Method of generator control in thermal power plants. How do you control the rotation of the generator (synchronous generators). This is what we’re doing.
- 10 min power point presentation, 5 min discussion. Assessment is based on content, the fundamental physics (analytical fundamentals, quantitative).
- Due 28th of Feb I think.
- Diodes as one way conductors, need to apply small forward bias voltage to conductor (almost like an energy tax).
- Thyristor, a special diode type, a controllable diode. A diode that can be open or closed by gate connected to junction. So that the depletion exists, or doesn’t exist.
- Can be used to control the voltage timing. Diode with additional means to control time. So not just having forward bias, but also triggering from the gate.
- Very often, opening is uncontrolled but closing is(?).
- With regular diode, voltage is fixed, with thyristor you have additional means to control the frequency of the voltage.
- IGBT’s used everywhere there’s an electric motor.
- Control circuit controls gate action.
- Capacitor is charged from three phase power supply.
- phase shifting
- How do we go about timing the phases.
- Point is to switch between positive and negative voltage of capacitor.
- Sparking due to mains power (pulling plug) and it’s relation to induction (?), depends on phase of current at that time.