This document discusses a single phase PWM rectifier for use in traction applications. It introduces PWM rectifiers and their features such as bidirectional power flow and nearly sinusoidal input current. It describes the structure and groups of PWM rectifiers, and includes a block diagram of the PWM rectifier. Experimental results are presented showing the rectifier's performance under different load and voltage conditions. The conclusion states that PWM control allows low switching frequencies for high power systems, and simulation/experimental results confirm the designed control structure works well under steady state and transient conditions.

1. Single Phase PWM Rectifier
In Traction Application
Guided by:
Prof. J. R. Rana
Delivered by:
Shubhamesh S. Patne

2. Contents:
• Introduction
• Features of PWM rectifier
• Structure of PWM rectifier
• Groups of PWM rectifier
• Block diagram of the PWM rectifier
• Experimental Results
• Conclusion

3. Introduction
• PWM (Pulse Width Modulation)
• ITM (Induction Traction Motor)
• PR (Proportional Resonant)
• WLSE (Weighted Least Squares Estimation)

4. Features of PWM rectifier
• Bi-directional power flow,
• Nearly sinusoidal input current,
• Regulation of input power factor to unity,
• Low harmonic distortion of line current (below5%),
• Adjustment and stabilization of DC link voltage (or current),
• Reduced capacitor (or inductor) size due to the continuous current,
• Properly operated under line voltage distortion and Line frequency
variations

5. Structure of PWM rectifier

6. Groups of PWM rectifier
voltage
rectifiers
Boost
rectifier
Increases
voltage
current
rectifiers
Buck
rectifier
Decreases
voltage

7. Block diagram of the PWM rectifier

8. Experimental Results
• Transient responses when DC-link voltage changes gradually with
no-load; a) input voltage and current, b) DC-link voltage,power
factor and frequency

9. Experimental Results
• Transient responses (PWM rectifier and inverter): no-load AM; a)
input voltage and current, b) DC-link voltage, power factor and
frequency

10. Experimental Results
• Transient responses (PWM rectifier and inverter): short-circuit AM
in ts = 0.2 s; a) input voltage and current, b) DC-link voltage, power
factor and frequency

11. Experimental Results
• Transient responses (Transient responses (PWM rectifier and
inverter): load on AM; a) input voltage and current, b) DC-link
voltage, power factor and frequency

12. Conclusion
• PWM control makes possible to employ shifted carriers,
which is eligible for high power systems with low
switching frequency
• The simulation and experimental results confirm proper
function of designed control structure under both steady
state and transient conditions.
• The PWM rectifier can perform well in as an active filter
or as an input rectifier for an indirect frequency
converter. (useful mainly in traction)
• A traction vehicle equipped with a PWM rectifier does
not consume reactive power, will not load the supply
network with harmonics and can recuperate.

13. Thank you !