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US 11,848,592 B2Granted
Methods and apparatus to control engine speed of a power system
AssigneeIllinois Tool Works Inc.
InventorsAlan F. Smith, Richard Joyce
Life of this patent
Estimating the term…
Abstract
Methods and apparatus to control engine speed of a power system are disclosed. An example power system includes: an engine; a generator configured to generate electrical power from mechanical power delivered by the engine; a switched-mode power supply configured to convert the electrical power from the generator to output power; and control circuitry configured to: monitor an input current to the switched-mode power supply; and in response to the input current exceeding a threshold current, incrementally increasing a speed of the engine.
Claims9
A power system, comprising:
- an engine;
- a generator configured to generate electrical power from mechanical power delivered by the engine, the electrical power comprising AC power having a predetermined voltage and a predetermined frequency at a predetermined engine speed;
- a switched-mode power supply configured to convert the electrical power from the generator to welding-type output power;
- and
- control circuitry configured to:
- monitor an input current to the switched-mode power supply;
- in response to the input current exceeding a threshold current, incrementally increasing a speed of the engine;
- detect a load on an AC auxiliary output;
- and
- in response to detecting the load on the AC auxiliary output, overriding an engine speed based on the switched-mode power supply and controlling the speed of the engine to be the predetermined speed to output the predetermined frequency.
7 more elements
A power system, comprising:
- an engine;
- a generator configured to generate electrical power from mechanical power delivered by the engine, the electrical power comprising AC power having a predetermined voltage and a predetermined frequency at a predetermined engine speed;
- an air compressor configured to generate and store air pressure in an air storage tank using the electrical power or the mechanical power;
- a switched-mode power supply configured to convert the electrical power from the generator to welding-type output power;
- and
- control circuitry configured to:
- monitor the air pressure in the air storage tank;
- determine a rate of air pressure change based on the monitoring of the air pressure;
- monitor an input current to the switched-mode power supply;
- in response to the input current exceeding a threshold current, incrementally increasing a speed of the engine;
- in response to the rate of air pressure change satisfying a threshold rate, incrementally increasing a speed of the engine;
- detecting a load on an AC auxiliary output;
- and
- in response to detecting the load on the AC auxiliary output, overriding an engine speed based on the switched-mode power supply and the air compressor, and controlling the speed of the engine to be the predetermined speed to output the predetermined frequency.
11 more elements
Dependencies are inferred from the claim text.