Granted Patent B1

US 12,384,507 · App. 17/985,284 · Granted Aug 12, 2025

Inventors: Mitchell J. Baer (Fond Du Lac, WI); Jared D. Kalnins (Neenah, WI); Robert Raymond Osthelder (Omro, WI); Lukas G. Neveau (Oshkosh, WI)

Assignee: Brunswick Corporation

B63H21/213B63H2021/216

Abstract

Claims (31)

1. An electric marine propulsion system for a marine vessel, comprising:

a power storage system;

an electric motor powered by the power storage system and configured to rotate a propulsor to propel the marine vessel; and

a control system configured to:

operate the electric motor according to an operator demand signal;

determine whether at least one filter latch condition is satisfied based on the operator demand signal; and

responsive to a determination that the at least one filter latch condition is satisfied, operate the electric motor according to a filtered motor input;

wherein the at least one filter latch condition comprises a change in the operator demand signal that exceeds a reduction demand threshold and does not exceed a reduction time threshold or a difference between the operator demand signal and a filtered demand signal exceeding a difference threshold.

2. The system of claim 1 , wherein the control system is further configured to:

determine whether at least one filter unlatch condition is satisfied; and

responsive to a determination that the at least one filter unlatch condition is satisfied, return operation of the electric motor according to the operator demand signal.

3. The system of claim 2 , wherein the at least one filter unlatch condition comprises the operator demand signal intersecting with the filtered motor input.

4. The system of claim 2 , wherein the at least one filter unlatch condition comprises a magnitude of the filtered motor input becoming less than a threshold value.

5. The system of claim 2 , wherein the at least one filter unlatch condition comprises a speed of the electric motor or the propulsor becoming less than a threshold speed value.

6. The system of claim 2 , wherein the at least one filter unlatch condition comprises both a magnitude of the filtered motor input becoming less than a threshold value and a speed of the electric motor or the propulsor becoming less than a threshold speed value.

7. The system of claim 1 , wherein the operator demand signal is based on a position of a control lever.

8. The system of claim 1 , wherein operating the electric motor according to a filtered motor input comprises applying a first order filter to the operator demand signal.

9. A method of controlling an electric marine propulsion system having an electric motor configured to rotate a propulsor to propel a marine vessel, the method comprising:

operating the electric motor according to an operator demand signal;

determining whether at least one filter latch condition is satisfied based on the operator demand signal; and

responsive to a determination that the at least one filter latch condition is satisfied, operating the electric motor according to a filtered motor input;

wherein the at least one filter latch condition comprises a change in the operator demand signal that exceeds a reduction demand threshold and does not exceed a reduction time threshold or a difference between the operator demand signal and a filtered demand signal exceeding a difference threshold.

10. The method of claim 9 , further comprising:

determining whether at least one filter unlatch condition is satisfied; and

responsive to a determination that the at least one filter unlatch condition is satisfied, returning operation of the electric motor according to the operator demand signal.

11. The method of claim 10 , wherein the at least one filter unlatch condition comprises the operator demand signal intersecting with the filtered motor input.

12. The method of claim 10 , wherein the at least one filter unlatch condition comprises a magnitude of the filtered motor input becoming less than a threshold value.

13. The method of claim 10 , wherein the at least one filter unlatch condition comprises a speed of the electric motor or the propulsor becoming less than a threshold speed value.

14. The method of claim 10 , wherein the at least one filter unlatch condition comprises both a magnitude of the filtered motor input becoming less than a threshold value and a speed of the electric motor or the propulsor becoming less than a threshold speed value.

15. The method of claim 9 , wherein the operator demand signal is based on a position of a control lever.

16. The method of claim 9 , wherein operating the electric motor according to a filtered motor input comprises applying a first order filter to the operator demand signal.

Assignments (1)

References Cited (15)