System and method for regulating resonant inverters

1. A resonant inverter control system comprising:

a switching circuit for applying power signals to a resonant inverter;

a sensor for sensing one or more parameters of the resonant inverter, the one or more parameters being representative of a phase angle;

a comparator for comparing the one or more parameters to a reference value;

a digital controller for determining timing of the one or more parameters based upon the comparison and a digital phase command and for regulating operation of the switching circuit based upon the timing of the one or more parameters, the digital phase command being representative of a desired phase angle.

2. The resonant inverter control system of claim 1 , wherein the one or more parameters comprise at least one of inductor voltage, inductor current, load voltage, and load current.

3. The resonant inverter control system of claim 1 , wherein the sensor comprises at least one of a current sensor and a voltage sensor.

4. The resonant inverter control system of claim 1 , wherein the reference value is a ground value.

5. The resonant inverter control system of claim 1 , further comprising a regulating circuit adapted to provide the digital phase command based on at least one of load voltage, load current, and a reference parameter.

6. The resonant inverter control system of claim 1 , wherein the digital phase command is in a range of 0 degree to 90 degrees.

7. The resonant inverter control system of claim 1 , wherein the timing of the one or more parameters comprises at least one of switching time, delay time, and duty time.

8. The resonant inverter control system of claim 7 , wherein the switching time is the time between two consecutive rising edges at zero-crossings of the one or more parameters.

9. The resonant inverter control system of claim 7 , wherein the delay time and the duty time are dependent on the switching time.

10. The resonant inverter control system of claim 1 , wherein the comparator and the digital controller is selected based upon control speed.

11. A method for regulating a resonant inverter, the method comprising:

sensing one or more parameters of the resonant inverter, the one or more parameters being representative of a phase angle;

comparing the one or more parameters to a reference value;

determining timing of the one or more parameters based upon the comparison and a digital phase command, the digital phase command being representative of a desired phase angle; and

regulating the resonant inverter via a switching circuit based upon the timing of the one or more parameters.

12. The method of claim 11 , wherein the one or more parameters comprises at least one of inductor voltage, inductor current, load voltage, and load current.

13. The method of claim 11 , wherein the timing of the one or more parameters comprises at least one of switching time, delay time, and duty time.

14. A tangible, machine readable media, comprising:

code adapted to sense one or more parameters of a resonant inverter, the one or more parameters being representative of a phase angle;

code adapted to compare the one or more parameters to a reference value;

code adapted to determine timing of the one or more parameters based upon the comparison and a digital phase command, the digital phase command being representative of a desired phase angle; and

code adapted to regulate the resonant inverter via a switching circuit based upon the timing of the one or more parameters.

15. The tangible, machine readable media of claim 14 , further comprising code adapted to provide the digital phase command based on at least one of load voltage, load current, and a reference parameter.

16. The resonant inverter control system of claim 1 , wherein the digital phase command is fixed or dynamically controlled.

17. The method of claim 11 , further comprising providing the digital phase command based on at least one of load voltage, load current, and a reference parameter.

18. The method of claim 11 , wherein the digital phase command is fixed or dynamically controlled.