A voltage control strategy for current-regulated PWM inverters

Journal Article · Mon Jan 01 04:00:00 EST 1996 · IEEE Transactions on Power Electronics

DOI:https://doi.org/10.1109/63.484411· OSTI ID:207723

Wasynczuk, O; Sudhoff, S D; Tran, T D ^[1]; Clayton, D H; Hegner, H J ^[2]

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1. Purdue Univ., West Lafayette, IN (United States). School of Electrical Engineering
2. Naval Surface Warfare Center, Annapolis, MD (United States). Carderock Div.

Alternative voltage control strategies for current-regulated PWM inverters are analyzed, including previously established feedforward and feedforward/feedback controllers and a newly proposed decoupling feedback control strategy. The steady-state and dynamic characteristics of each of these control methods are illustrated and compared for a selected inverter design. It is shown that the feedforward controller exhibits steady-state error and an undesirable overshoot of the output voltages during startup. The addition of a feedback loop eliminates the steady-state error and reduces the overshoot; however, the natural response is underdamped regardless of the choice of feedback gains. A decoupling feedback control strategy that eliminates the disadvantages of the feedforward and feedforward/feedback controllers is described. Using the decoupling feedback controller, it is possible to eliminate the steady-state error and place the closed-loop poles wherever desired. Moreover, if the closed-loop poles are selected appropriately, it is possible to eliminate the overshoot of the output voltages during startup transients.

• OSTI ID: 207723
• Journal Information: IEEE Transactions on Power Electronics, Journal Name: IEEE Transactions on Power Electronics Journal Issue: 1 Vol. 11; ISSN ITPEE8; ISSN 0885-8993
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CONTROL THEORY
ELECTRIC CONTROLLERS
INVERTERS
STABILITY
STABILIZATION
VOLTAGE REGULATORS