Energy management system for machinery performing a predictable work cycle

• US 10,132,335 B2
• Filed: 09/23/2013
• Issued: 11/20/2018
• Est. Priority Date: 09/21/2012
• Status: Active Grant

• Current Assignee: Harnischfeger Technologies Inc. (Mitsui & Company Limited)
• Original Assignee: Joy Global Surface Mining Inc. (Mitsui & Company Limited)
• Inventors: Wutke, Joe, Dorsett, William A., Barr, Marcus N., Sorgee, Jason
• Primary Examiner(s): Berona, Kimberly S
• Assistant Examiner(s): Odeh, Nadeem
• Application Number:
  US14/034,042
• Publication Number:
  US 20140083089A1
• Time in Patent Office: 1,884 Days
• Field of Search: 701 50, 701 36
• CPC Class Codes: E02F 3/437 providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant
• CPC Class Codes: E02F 9/2075 of the hybrid type for vehicles in general B60W20/00
• CPC Class Codes: E02F 9/265 with follow-up actions (e.g. control signals sent to actuate the work tool)
• CPC Class Codes: F15B 15/18 Combined units comprising both motor and pump

Abstract

Industrial machines and methods of operating the same. One industrial machine includes at least one controller that is configured to (1) detect an occurrence of a regenerative work cycle segment within a repetitive work cycle performed by the industrial machine and including a plurality of work cycle segments and (2) modify operation of at least one power source included in the industrial machine for the regenerative work cycle segment (i.e., prior to and/or during the regenerative work cycle segment).

Claims

1. An industrial machine performing a plurality of work cycle segments wherein at least one of the plurality of work cycle segments is a regenerative work cycle segment, the regenerative work cycle segment being a work cycle segment when consumed machine power is negative, the industrial machine comprising:

at least one controller configured to (1) detect a current work cycle segment of the plurality of work cycle segments, (2) detect whether the current work cycle segment or a work cycle segment of the plurality of work cycle segments subsequent to the current work cycle segment is a regenerative work cycle segment, and (3) directly modify operation of an engine included in the industrial machine when the current work cycle segment or the work cycle segment of the plurality of work cycle segments subsequent to the current work cycle segment is the regenerative work cycle segment in order to consume regenerative power generated during the regenerative work cycle segment with at least one actuator included in the industrial machine.

2. The industrial machine of claim 1, wherein the at least one controller is configured to modify the operation of the engine by increasing a speed of the engine.

3. The industrial machine of claim 1, wherein the at least one controller is configured to modify the operation of the engine by decreasing a speed of the engine.

4. The industrial machine of claim 1, wherein the at least one controller is configured to modify the operation of the engine prior to a start of the regenerative work cycle segment.

5. The industrial machine of claim 1, further comprising a dipper performing the plurality of work cycle segments.

6. The industrial machine of claim 5, further comprising at least one sensor configured to detect a position of the dipper.

7. The industrial machine of claim 6, wherein the at least one sensor includes at least one of a crowd sensor, a swing sensor, and a hoist sensor.

8. The industrial machine of claim 6, wherein the plurality of work cycle segments includes a dig segment, a swing segment, a dump segment, and a return segment.

9. The industrial machine of claim 5, wherein the controller is configured to detect the current work cycle segment based on information from the at least one sensor.

10. The industrial machine of claim 5, further comprising an operator interface configured to receive at least one motion command.

11. The industrial machine of claim 10, wherein the at least one motion command includes at least one of a crowd control, a swing control, a hoist control, and a door control.

12. The industrial machine of claim 10, wherein the controller is configured to detect the current work cycle segment based on the at least one motion command.

13. A method of operating an industrial machine performing a plurality of work cycle segments wherein at least one of the plurality of work cycle segments is a regenerative work cycle segment, the regenerative work cycle segment being a work cycle segment when consumed machine power is negative, the method comprising:

detecting, by a controller, a current work cycle segment of the plurality of work cycle segments;

detecting, by the controller, whether the current work cycle segment or a work cycle segment of the plurality of work cycle segments subsequent to the current work cycle segment is a regenerative work cycle segment; and

directly modifying, by the controller, operation of an engine included in the industrial machine when the current work cycle segment or a work cycle segment of the plurality of work cycle segments subsequent to the current work cycle is the regenerative work cycle segment in order to consume regenerative power generated during the regenerative work cycle segment with at least one actuator included in the industrial machine.

14. The method of claim 13, wherein modifying the operation of the engine includes modifying the operation of the engine prior to a start of the regenerative work cycle segment.

15. The method of claim 13, wherein modifying the operation of the engine includes increasing a speed of the engine.

16. The method of claim 13, wherein modifying the operation of the engine includes decreasing a speed of the engine.

17. The method of claim 13, further comprising returning the engine to non-modified operation after an end of the regenerative work cycle segment.

18. An energy management system included in a machine comprising:

a power conversion unit generating regulated electrical energy;

an actuator receiving regulated electrical energy from the power conversion unit to operate at least one tool performing a plurality of work cycle segments wherein at least one of the plurality of work cycle segments is a regenerative work cycle segment, the regenerative work cycle segment being a work cycle segment when consumed machine power is negative;

an engine;

a motor-generator coupled to and driven by the engine, the motor-generator generating electrical energy; and

a controller configured to (1) detect a current work cycle segment of the plurality of work cycle segments, (2) detect whether the current work cycle segment or a work cycle segment of the plurality of work cycle segments subsequent to the current work cycle segment is a regenerative work cycle segment, and (3) directly modify operation of the engine when the current work cycle segment or the work cycle segment of the plurality of work cycle segments subsequent to the current work cycle segment is the regenerative work cycle segment in order to consume the regenerative power generated during the one of the plurality of work cycle segments with the actuator.

19. The energy management system of claim 18, wherein the controller is configured to modify the operation of the engine by increasing a speed of the engine.

20. The energy management system of claim 18, wherein the controller is configured to modify the operation of the engine by decreasing a speed of the engine.

21. The energy management system of claim 18, wherein the motor-generator drives the engine during the one of the plurality of work cycle segments.