Boost converter state control

Patent metadata

Field	Value
Publication number	US-12328080-B2
Application number	US-202217962004-A
Country	US
Kind code	B2
Filing date	Oct 7, 2022
Priority date	Oct 28, 2021
Publication date	Jun 10, 2025
Grant date	Jun 10, 2025

Abstract

Provided are embodiments for a system and method for controlling a boost control circuit. Embodiments include a power supply and a boost converter circuit coupled to the power supply, wherein the boost converter circuit is operable to provide power to the load. Embodiments also include a 3-phase inverter coupled to the boost converter, wherein the 3-phase-inverter is operable to provide a 3-phase output, and a controller coupled to the boost converter and the 3-phase inverter. The controller can be configured to receive a voltage level of a power supply and a voltage level of a 3-phase inverter; compare a power threshold to at least one of: the voltage level of the power supply and the voltage level of the 3-phase inverter; and control an operation of the boost converter circuit to operate in a boost mode or a rectification mode based at least in part on the comparison.

First claim

What is claimed is:

1. A system for controlling a boost control circuit, the system comprising:
a DC power supply;
a boost converter circuit coupled to the DC power supply;
a 3-phase inverter coupled to the boost converter circuit, wherein the 3-phase-inverter is operable to provide a 3-phase AC output to the load;
a controller coupled to the boost converter circuit and the 3-phase inverter, wherein the controller is further configured to:
receive a voltage level of a DC power supply and a voltage level of a 3-phase inverter;
compare a threshold voltage of the voltage level of the DC power supply to the voltage level of the 3-phase inverter; and
control an operation of the boost converter circuit to operate in a boost mode or a rectification mode based at least in part on the comparison.

2. The system of claim 1 , wherein the controller is further configured to operate the boost converter circuit in the boost mode when the threshold voltage of the voltage level of the DC power supply is less than the voltage level of the 3-phase inverter.

3. The system of claim 1 , wherein the controller is further configured to operate the boost converter circuit in the rectification mode when the threshold voltage of the voltage level of the DC power supply is greater than the voltage level of the 3-phase inverter.

4. The system of claim 1 , further comprising a transformation module configured to transform an output of the 3-phase inverter to a synchronous frame voltage level.

5. The system of claim 4 , wherein the transformation module performs an ABC-to-dq conversion.

6. The system of claim 1 , wherein the threshold voltage of the voltage level of the DC power supply is 93% to 97% of the voltage level of the DC power supply.

7. The system of claim 1 , wherein the threshold voltage of the voltage level of the DC power supply is 95% of the voltage level of the DC power supply.

8. The system of claim 1 , further comprising:
a first voltage sensor connected across a first phase of the 3-phase inverter and a second phase of the 3-phase inverter; and
a second voltage sensor connected across the second phase of the 3-phase inverter and a third phase of the 3-phase inverter;
the first voltage sensor and the second voltage sensor configured to sense the voltage level of the 3-phase inverter.

9. A method for controlling a boost converter circuit, the method comprising:
receiving, at a controller, a voltage level of a DC power supply and a voltage level of a 3-phase inverter configured to provide a 3-phase AC output to a load;
comparing a threshold voltage of the voltage level of the DC power supply to the voltage level of the 3-phase inverter; and
controlling an operation of the boost converter circuit to operate in a boost mode or a rectification mode based at least in part on the comparison.

10. The method of claim 9 , wherein when the threshold voltage of the voltage level of the DC power supply is less than the voltage level of the 3-phase inverter, the boost converter circuit is operated in the boost mode.

11. The method of claim 9 , wherein when the threshold voltage of the voltage level of the DC power supply is greater than the voltage level of the 3-phase inverter and, the boost converter circuit is operated in the rectification mode.

12. The method of claim 9 , further comprising transforming an output of the 3-phase inverter to a synchronous frame voltage level.

13. The method of claim 12 , wherein the transformation is an ABC-to-dq conversion.

14. The method of claim 9 , wherein the threshold voltage of the voltage level of the power supply is 93% to 97% of the voltage level of the power supply.

15. The method of claim 9 , wherein the threshold voltage of the voltage level of the DC power supply is 95% of the voltage level of the DC power supply.

Assignees

• Carrier Corp

Inventors

• Dotson Thomas
• Agirman Ismail

Classifications

• H02M3/156

  with automatic control of output voltage or current, e.g. switching regulators · CPC title

• H02M1/007

  Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826) · CPC title

• H02M1/0032

  Control circuits allowing low power mode operation, e.g. in standby mode · CPC title

• H02M7/53871

  with automatic control of output voltage or current · CPC title

• H02P29/028

  the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault · CPC title