Half-bridge power supply with dynamic dead time

1. A half-bridge power supply comprising:

a first switch electrically connected to an energy source and to a load;

a second switch electrically connected to the energy source and to the load;

circuitry electrically connected to the first and second switches and configured to provide a dynamic dead time for the half-bridge power supply based on one of the first and second switches being turned off having forward current; and

a controller electrically connected to the circuitry, the controller including a first processor.

2. The half-bridge power supply of claim 1 , wherein at least one of the first and second switches comprises a silicon carbide MOSFET.

3. The half-bridge power supply of claim 1 , wherein at least one of the first and second switches comprises an IGBT.

4. The half-bridge power supply of claim 1 , wherein at least one of the first and second switches comprises a silicon MOSFET.

5. The half-bridge power supply of claim 1 , wherein the half-bridge power supply comprises an inverter.

6. The half-bridge power supply of claim 1 , wherein the circuitry comprises a logic circuit electrically connected to the controller.

7. The half-bridge power supply of claim 6 , wherein the logic circuit comprises a field-programmable gate array.

8. The half-bridge power supply of claim 1 , wherein the circuitry comprises a second processor executing software, wherein the software defines the dynamic dead time.

9. The half-bridge power supply of claim 8 , wherein the second processor is the first processor.

10. The half-bridge power supply of claim 1 , wherein the circuitry is configured to provide the dynamic dead time by controlling a pulse width modulation scheme for the first and second switches.

11. A half-bridge power supply comprising:

a first switch electrically connected to an energy source and to a load;

a second switch electrically connected to the energy source and to the load; and

circuitry electrically connected to the first and second switches and configured to provide a dynamic dead time for the half-bridge power supply based on one of the first and second switches being turned off having forward current;

wherein the circuitry is configured to obtain the dynamic dead time from a lookup table.

12. The half-bridge power supply of claim 11 , wherein the lookup table includes different dynamic dead times associated with respective voltages and currents.

13. A half-bridge power supply comprising:

a first switch electrically connected to an energy source and to a load;

a second switch electrically connected to the energy source and to the load; and

circuitry electrically connected to the first and second switches and configured to provide a dynamic dead time for the half-bridge power supply based on one of the first and second switches being turned off having forward current;

wherein the circuitry is configured to obtain the dynamic dead time using a polynomial based on at least current.

14. A half-bridge power supply comprising:

a first switch electrically connected to an energy source and to a load;

a second switch electrically connected to the energy source and to the load; and

circuitry electrically connected to the first and second switches and configured to provide a dynamic dead time for the half-bridge power supply based on one of the first and second switches being turned off having forward current;

wherein the circuitry is configured to provide a fixed dead time for the half-bridge power supply based on the one of the first and second switches being turned off having reverse current.

15. A half-bridge power supply comprising:

a first switch electrically connected to an energy source and to a load;

a second switch electrically connected to the energy source and to the load; and

means for obtaining a dynamic dead time from a lookup table and providing the dynamic dead time for the half-bridge power supply based on one of the first and second switches being turned off having forward current.

16. A system comprising:

an energy source;

a motor;

a first half-bridge, the first half-bridge comprising:

a first switch electrically connected to the energy source and to the motor;

a second switch electrically connected to the energy source and to the motor; and

first circuitry electrically connected to the first and second switches and configured to provide a dynamic dead time for the first half-bridge based on one of the first and second switches being turned off having forward current; and

a controller electrically connected to the first circuitry, the controller including a processor.

17. The system of claim 16 , wherein the motor includes a first phase winding, a second phase winding, and a third phase winding, wherein the first half-bridge is electrically connected to the first phase winding, the system further comprising:

a second half-bridge, the second half-bridge electrically connected to the second phase winding and comprising:

a third switch electrically connected to the energy source and to the motor;

a fourth switch electrically connected to the energy source and to the motor; and

second circuitry electrically connected to the third and fourth switches and configured to provide a dynamic dead time for the second half-bridge based on one of the third and fourth switches being turned off having forward current; and

a third half-bridge, the third half-bridge electrically connected to the third phase winding and comprising:

a fifth switch electrically connected to the energy source and to the motor;

a sixth switch electrically connected to the energy source and to the motor; and

third circuitry electrically connected to the fifth and sixth switches and configured to provide a dynamic dead time for the third half-bridge based on one of the fifth and sixth switches being turned off having forward current.

18. The system of claim 17 , wherein the first, second, and third circuitries are included in a common logic circuit.

19. The system of claim 17 , wherein the first, second, and third circuitries are formed by the processor by executing software.