A Generalized Discontinuous PWM Scheme for Three-Level NPC Traction Inverter With Minimum Switching Loss for Electric Vehicles
| Autor: | Subrata Banerjee, Sarbani Mukherjee, Sourabh Kundu, Santu Kumar Giri |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Offset (computer science)
Computer science 020209 energy 020208 electrical & electronic engineering 02 engineering and technology Power factor Industrial and Manufacturing Engineering law.invention Amplitude modulation Capacitor Control and Systems Engineering law Control theory 0202 electrical engineering electronic engineering information engineering Inverter Torque Electrical and Electronic Engineering Induction motor Pulse-width modulation |
| Zdroj: | IEEE Transactions on Industry Applications. 55:516-528 |
| ISSN: | 1939-9367 0093-9994 |
| DOI: | 10.1109/tia.2018.2866565 |
| Popis: | A discontinuous pulsewidth modulation (DPWM) strategy for three-level neutral-point-clamped (NPC) traction inverter drive for electric vehicles (EVs) with minimum switching loss for the full power factor (PF) range is developed and presented in this paper. Considering the dynamic loading conditions in an EV propelled by an induction motor (IM), the discontinuous modulation strategy is generalized to obtain minimum switching loss for a wide variations in load PF and modulation depth. The dynamic operating conditions in EV may render frequent unbalances in dc-link capacitor voltages in NPC inverter. It is demonstrated that the addition of an appropriate offset signal with the reference discontinuous signals generates compensating neutral current in the right direction, which can be used to mitigate existing unbalance in two dc-link capacitor voltages. Minimum switching loss at variable PF is attained by positioning the nonswitching clamped regions of the reference auxiliary signals according to the load PF. The effectiveness of the proposed scheme for a wide range of torque/speed variations is studied through simulation by developing a MATLAB/SIMULINK model of an IM traction inverter drive with field-oriented control strategy for closed loop control. Finally, the modulation scheme is validated through experimentation in a small-scale prototype NPC inverter with motor loads. |
| Databáze: | OpenAIRE |
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