Week-6 Challenge: EV Drivetrain
AC-DC Converters
- A single-phase converter with two natural commutated thyristor is shown
- Average value of the output voltage can be controlled by varying the conduction time of thyristors
- This converters are also known as controlled rectifiers
AC-AC Converters
- Used to obtain variable AC output voltage from a fixed AC source
- a single-phase converter with a TRIAC is shown below
DC-DC Converters
- Is also known as Chopper or Switching Regulator
- The average output voltage is controlled by varying the conduction of transistor, t1t1.
- If TT is the chopping period, then t1=δTt1=δT
- δδ is called as the duty cycle of chopper
DC-AC Converters
- Is also known as Inverter
- If transistor Q1Q1 and Q2Q2 conduct for one-half period and Q3Q3 and Q4Q4 conduct the other half, the output voltage is of alternating form
referance - https://manashmndl1.gitbooks.io/power-electronics/content/types.html
2.
given
voltage = 72V
Ra = 0.5 ohm
K = 0.7
T = 24.7 + (0.0051)*(w^2)
duty cycle = 70%
solution
w = V/K - (T*Ra)/K^2 ....... eq 1
V = 72*70% = 50.4
(substitute V in eq 1)
w = 50.4/0.7 - (T*0.5)/(0.49)
w = 72 - (1.020)T ........... eq 2
(substitue value of T in eq 2)
w = 46.806 - 0.005202*(w^2)
0.005202*(w^2) + w - 46.806
w = 38.924 or -231.158
3.