Back to results
US 2016/0105128 A1Published application
Robust single-phase DC/AC inverter for highly varying DC voltages
AssigneeThe Regents of the University of California
InventorsRicardo G. Sanfelice, Jun Chai
Life of this patent
Estimating the term…
Abstract
A single-phase DC/AC inverter has a single-phase inverter bridge with binary switches connected to an RLC low-pass filter. Digital control logic in a control circuit (or in a microcontroller) determines and controls a logic state q determining the position of the switches in the inverter bridge from sensed iL, vC values from the RLC filter. The control logic selects one of multiple possible logic states q based on whether the sensed iL, vC values belongs one of multiple boundary regions of a tracking band in an iL, vC state space.
Claims4
A single-phase DC/AC inverter comprising:
- two DC input terminals;
- a single-phase inverter bridge having a set of four signal-controllable switches S1,S2,S3,S4 connected to the two DC terminals;
- a series RLC low-pass filter connected to the single-phase inverter bridge;
- two AC output terminals connected to the series RLC low-pass filter;
- and
- a controller circuit comprising:
- input lines for sensing current and voltage values from an inductor and capacitor of the RLC low-pass filter;
- output lines for sending a logic state control signal to the set of four signal-controllable switches S1,S2,S3S4;
- digital control logic that outputs by the output lines the logic state q in response to the sensed current and voltage values, where the control logic switches the logic state q by selecting one of multiple possible logic states based on whether the sensed current and voltage values intersect one of multiple boundary regions of a tracking band in an current-voltage state space.
6 more elements
Dependencies are inferred from the claim text.