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Topics_for_test2 - speed controllers and the unity...

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Topics for Mid-Semester Test #2 1. Switch-mode converters: Textbook, chapter 4 Circuit diagram of converter as a single pole (A): - Input and output voltage and current waveforms, - Equation for duty ratio and relationship between average values of input and output voltages and currents, - Buck and boost modes of operation, - Calculation of ripple current, - Circuit diagram of a pole (A) converter with diodes and transistors. 2-quadrant and 4-quadrant operation of switch-mode converter (circuit diagrams and relations for the duty ratio, gain and output voltage. Circuit diagram of switch-mode converter for: DC motor and AC 3-phase motor 2. Feedback controllers for DC motor drives: Textbook, chapter 8 General control system representation; cascade control of motor drive Definitions of control terms with the aim of Bode plot: phase margin, crossover frequency, bandwidth Block diagram of PI controller and its transfer function Block diagram of DC motor connected in the control system with current and
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Unformatted text preview: speed controllers and the unity feedbacks • Block diagrams that are applied for determining of the gains of current, speed and position controllers Numerical problem will relate to the problems for homework and project 2. 3. Rotating magnetic field and space-vector representation: handouts and Textbook, chapter 9 • What type of winding and supply is necessary to generate rotating magnetic field. Illustration of generation of resultant magnetic field by means of current and magnetic flux phase vectors; speed of the rotating field (handouts). • Machine model with sinusoidally distributed winding: function of conductor density, mmf, flux density • 3-phase winding machine and space vectors for mmfs, currents and voltages and physical interpretation of current space vector. • Finding phase currents from the current space vector • Voltage induced in the winding...
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