ENGINE-DRIVEN POWER SYSTEMS HAVING LOAD MANAGEMENT PRIORITIZATION

20220037885

17/387559

July 28, 2021

An example engine-driven power system includes: an engine; a generator configured to convert mechanical engine power to electrical power; first and second power subsystems configured to convert the mechanical or electrical power to first and second power outputs, wherein the first and second power subsystems are configurable to output the first and second power outputs simultaneously; an input device configured to control a load management priority, wherein the load management priority comprises at least one of an adjustable ranking, an adjustable balance, or bus voltage thresholds; and control circuitry configured to: control the first and second power subsystems to output the first and second power outputs based on first and second demands; and, in response to determining that a total demand exceeds a capacity, control the first or second power subsystems to reduce the power outputs or the demands based on the load management priority.

1. An engine-driven power system, comprising: an engine; a generator configured to convert mechanical power output by the engine to electrical power; a first power subsystem configured to convert at least one of the mechanical power or the electrical power to a first power output; a second power subsystem configured to convert at least one of the mechanical power or the electrical power to a second power output, wherein the first power subsystem and the second power subsystem are configurable to output at least a portion of the first power output and at least a portion of the second power output simultaneously; an input device configured to control a load management priority associated with the first power subsystem and the second power subsystem, wherein the load management priority comprises at least one of an adjustable ranking of the first and second power subsystems, an adjustable balance between the first and second power subsystems, or bus voltage thresholds for the first and second power subsystems; and control circuitry configured to: control the first power subsystem to output the first power output based on a first demand; control the second power subsystem to output the second power output based on a second demand; and in response to determining that a total demand, including the first demand and the second demand, exceeds a capacity of the engine, control at least one of the first power subsystem to reduce the first power output or the first demand or the second power subsystem to reduce the second power output or the second demand based on the load management priority.

2. The engine-driven power system as defined in claim 1, wherein the first power subsystem comprises at least one of: a hydraulic system configured to output the first power output as hydraulic power; an air compressor configured to output the first power output as pneumatic power; a welding-type power supply configured to output the first power output as welding-type power; an auxiliary power supply configured to output the first power output as at least one of AC power or DC power; an external power supply configured to convert at least one of the AC power or the DC power from the auxiliary power supply or the generator to at least one of AC power or DC power and configured to communicate with the controller; or a vehicle subsystem configured to convert the electrical power to at least one of AC power or DC power to power at least one component of a vehicle on which the engine-driven power system is mounted.

3. The engine-driven power system as defined in claim 1, wherein the second power subsystem comprises at least one of: a hydraulic system configured to output the second power output as hydraulic power; an air compressor configured to output the second power output as pneumatic power; a welding-type power supply configured to output the second power output as welding-type power; an auxiliary power supply configured to output the first power output as at least one of AC power or DC power; an external power supply configured to convert at least one of the AC power or the DC power from the auxiliary power supply or the generator to at least one of AC power or DC power and configured to communicate with the controller; or a vehicle subsystem configured to convert the electrical power to at least one of AC power or DC power to power at least one component of a vehicle on which the engine-driven power system is mounted.

4. The engine-driven power system as defined in claim 1, wherein the load management priority comprises a selection of a first one of the first power subsystem or the second power subsystem as having priority over a second one of the first power subsystem or the second power subsystem.

5. The engine-driven power system as defined in claim 4, wherein the control circuitry is configured to, in response to determining that the total demand exceeds the capacity of the engine, fold back the second one of the first power subsystem or the second power subsystem while the total demand exceeds the capacity of the engine.

6. The engine-driven power system as defined in claim 5, wherein the control circuitry is configured to, in response to determining that the total demand exceeds the capacity of the engine and the second one of the first power subsystem or the second power subsystem is completely folded back, fold back the first one of the first power subsystem or the second power subsystem while the total demand exceeds the capacity of the engine.

7. The engine-driven power system as defined in claim 1, further comprising a preregulator configured to convert the electrical power from the generator to output a voltage bus based on a target bus voltage, and the first power subsystem and the second power subsystem are coupled to receive the electrical power from the voltage bus.

8. The engine-driven power system as defined in claim 7, wherein the control circuitry is configured to determine that the total demand exceeds the capacity of the engine based on a voltage of the voltage bus.

9. The engine-driven power system as defined in claim 8, wherein the load management priority comprises a first bus voltage threshold associated with the first power subsystem and a second bus voltage threshold associated with the second power subsystem, wherein the control circuitry is configured to: fold back the first power subsystem while the voltage bus is less than the first bus voltage threshold; and fold back the second power subsystem while the voltage bus is less than the second bus voltage threshold.

10. The engine-driven power system as defined in claim 1, further comprising a third power subsystem configured to convert at least one of the mechanical power or the electrical power to a third power output, wherein the load management priority comprises a ranking of the first power subsystem, the second power subsystem, and the third power subsystem.

11. The engine-driven power system as defined in claim 10, wherein the control circuitry is configured to fold back at least one of the first power subsystem, the second power subsystem, or the third power subsystem, based on the ranking, while the total demand exceeds the capacity of the engine.

12. The engine-driven power system as defined in claim 10, wherein the control circuitry is configured to determine the ranking based on values received via the input device.

13. The engine-driven power system as defined in claim 1, wherein the load management priority comprises the adjustable balance between the first power subsystem and the second power subsystem, and the control circuitry is configured to proportionally fold back the first power subsystem and the second power subsystem based on the balance while the total demand exceeds the capacity of the engine.

14. An engine-driven power system, comprising: an engine; a generator configured to convert mechanical power output by the engine to electrical power; a hydraulic subsystem configured to convert at least one of the mechanical power or the electrical power to a hydraulic output; a pneumatic subsystem configured to convert at least one of the mechanical power or the electrical power to a pneumatic output, wherein the hydraulic subsystem and the pneumatic subsystem are configurable to output at least a portion of the hydraulic output and at least a portion of the pneumatic output simultaneously; an input device configured to control a load management priority associated with the hydraulic subsystem and the pneumatic subsystem, wherein the load management priority comprises at least one of an adjustable ranking of the hydraulic subsystem and the pneumatic subsystem, an adjustable balance between the hydraulic subsystem and the pneumatic subsystem, or bus voltage thresholds for the hydraulic subsystem and the pneumatic subsystem; and control circuitry configured to: control the hydraulic subsystem to output the hydraulic output based on a hydraulic demand; control the pneumatic subsystem to output the pneumatic output based on a pneumatic demand; and in response to determining that a total demand, including the hydraulic demand and the pneumatic demand, exceeds a capacity of the engine, control at least one of the hydraulic subsystem to reduce the hydraulic output or the hydraulic demand or the pneumatic subsystem to reduce the pneumatic output or the pneumatic demand based on the load management priority.

15. The engine-driven power system as defined in claim 14, wherein the load management priority comprises a selection of a first one of the hydraulic subsystem or the pneumatic subsystem as having priority over a second one of the hydraulic subsystem or the pneumatic subsystem.

16. The engine-driven power system as defined in claim 15, wherein the control circuitry is configured to, in response to determining that the total demand exceeds the capacity of the engine, fold back the second one of the hydraulic subsystem or the pneumatic subsystem while the total demand exceeds the capacity of the engine.

17. The engine-driven power system as defined in claim 14, further comprising an electrical power subsystem configured to convert the electrical power to at least one of a welding-type power output, an AC power output, or a DC power output, wherein the load management priority comprises a ranking of the hydraulic subsystem, the pneumatic subsystem, and the electrical power subsystem.

18. The engine-driven power system as defined in claim 17, wherein the control circuitry is configured to fold back at least one of the hydraulic subsystem, the pneumatic subsystem, or the electrical power subsystem, based on the ranking, while the total demand exceeds the capacity of the engine.

19. The engine-driven power system as defined in claim 14, wherein the load management priority comprises a balance between the hydraulic subsystem and the pneumatic subsystem, and the control circuitry is configured to fold back at least one of the hydraulic subsystem and the pneumatic subsystem while the total demand exceeds the capacity of the engine proportionally based on the balance.

20. The engine-driven power system as defined in claim 14, wherein the control circuitry is configured to determine that the total demand exceeds the capacity of the engine when a difference between a determined engine speed and a target engine speed is at least a threshold.

21. (canceled)

02; 05; 23

edspap.20220037885