Automatic boosting current adjustment for zero voltage switching in auxiliary resonant commutated pole inverter

Patent metadata

Field	Value
Publication number	US-12597869-B2
Application number	US-202318483088-A
Country	US
Kind code	B2
Filing date	Oct 9, 2023
Priority date	Oct 9, 2023
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

The present disclosure provides a method, control circuit, and non-transitory computer-readable medium for adjusting a boosting current of an auxiliary resonant commutated pole inverter (ARCPI). The method includes: (1) providing an input to trigger a first counter; (2) triggering a second counter based on determining that the first counter reaches a boosting time of the ARCPI; (3) stopping the second counter based on determining that a detection signal is received, and obtaining a time interval counted by the second counter; and (4) adjusting the boosting current based on determining that the time interval is equal to a sum of a first time and a blanking time.

First claim

What is claimed is:

1 . A method for adjusting a boosting current of an auxiliary resonant commutated pole inverter (ARCPI), comprising:
(1) providing an input to trigger a first counter; (2) triggering a second counter based on determining that the first counter reaches a boosting time of the ARCPI; (3) stopping the second counter based on determining that a detection signal is received, and obtaining a time interval counted by the second counter; and (4) adjusting the boosting current based on determining that the time interval is equal to a sum of a first time and a blanking time.

2 . The method of claim 1 , wherein the adjusting the boosting current comprises:
increasing the first time by a first time value and repeating the steps (1)-(4) until the time interval is less than the sum of the first time and the blanking time based on determining that the first time is less than a maximal time; determining whether the boosting current is less than a maximal boosting current based on determining that the first time is larger than or equal to the maximal time; and increasing the boosting current by a boosting current value and repeating the steps (1)-(4) until the time interval is less than the sum of the first time and the blanking time in response to the boosting current being less than the maximal boosting current.

3 . The method of claim 2 , further comprising:
indicating “search failure” in response to the boosting current being larger than or equal to the maximal boosting current.

4 . The method of claim 1 , further comprising:
indicating the boosting current is set based on determining that the time interval is less than the sum of the first time and the blanking time.

5 . The method of claim 1 , wherein the boosting time is calculated as follows:

T
bst

=

(

I
o

+

I
bst

)

·
2
·

L
r

V

D
⁢
C

where V DC represents a direct current (DC) bus voltage, L r represents resonance inductance of a resonant inductor of the ARCPI, I o represents a present output current at a commutation moment of the ARCPI, and I bst represents the boosting current corresponding to the boosting time of the ARCPI.

6 . The method of claim 1 , wherein the detection signal is determined through a detection circuit for a main switch of the ARCPI.

7 . The method of claim 1 , wherein the input is a pulse width modulation (PWM).

8 . The method of claim 1 , wherein the first counter is the same as the second counter, or the first counter is different from the second counter.

9 . A control circuit for adjusting a boosting current of an auxiliary resonant commutated pole inverter (ARCPI), comprising one or more processors configured to:
(1) provide an input to trigger a first counter; (2) trigger a second counter based on determining that the first counter reaches a boosting time of the ARCPI; (3) stop the second counter based on determining that a detection signal is received, and obtaining a time interval counted by the second counter; and (4) adjust the boosting current based on determining that the time interval is equal to a sum of a first time and a blanking time.

10 . The control circuit of claim 9 , wherein the one or more processors are further configured to:
increase the first time by a first time value and repeating the steps (1)-(4) until the time interval is less than the sum of the first time and the blanking time based on determining that the first time is less than a maximal time; determine whether the boosting current is less than a maximal boosting current based on determining that the first time is larger than or equal to the maximal time; and increase the boosting current by a boosting current value and repeating the steps (1)-(4) until the time interval is less than the sum of the first time and the blanking time in response to the boosting current being less than the maximal boosting current.

11 . The control circuit of claim 10 , wherein the one or more processors are further configured to:
indicate “search failure” in response to the boosting current being larger than or equal to the maximal boosting current.

12 . The control circuit of claim 9 , wherein the one or more processors are further configured to:
indicate the boosting current is set based on determining that the time interval is less than the sum of the first time and the blanking time.

13 . The control circuit of claim 9 , wherein the boosting time is calculated as follows:

T
bst

=

(

I
o

+

I
bst

)

·
2
·

L
r

V

D
⁢
C

where V DC represents a direct current (DC) bus voltage, L r represents resonance inductance of a resonant inductor of the ARCPI, I o represents a present output current at a commutation moment of the ARCPI, and I bst represents the boosting current corresponding to the boosting time of the ARCPI.

14 . The control circuit of claim 9 , wherein the detection signal is determined through a detection circuit for a main switch of the ARCPI.

15 . The control circuit of claim 9 , wherein the input is a pulse width modulation (PWM).

16 . The control circuit of claim 9 , wherein the first counter is the same as the second counter, or the first counter is different from the second counter.

17 . A non-transitory computer-readable medium, having computer-executable instructions stored thereon, the computer-executable instructions, when executed by one or more processors of a control circuit for adjusting a boosting current of an auxiliary device of an auxiliary resonant commutated pole inverter (ARCPI), cause the control circuit to facilitate:
(1) providing an input to trigger a first counter; (2) triggering a second counter based on determining that the first counter reaches a boosting time of the ARCPI; (3) stopping the second counter based on determining that a detection signal is receiv

Assignees

• Abb Schweiz Ag

Inventors

• Aeloiza Eddy C
• Mandic Goran
• Chen Weiqiang

Classifications

• H02M7/5395

  by pulse-width modulation · CPC title

• H02M1/083

  for the ignition at the zero crossing of the voltage or the current · CPC title

• H02M1/0058

  by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero (using an auxiliary actively switched resonant commutation circuit connected to an intermediate DC voltage or between two push-pull branches of an inverter bridge H02M7/4811; in resonant inverters H02M7/4815; in inverters operating from a resonant DC source H02M7/4826) · CPC title

• Y02B70/10

  Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes · CPC title

• H02M1/342

  Active non-dissipative snubbers · CPC title