Permanent Magnet Generator Air Compressor Control
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Solution Overview
Problem
Conventional welding-type power systems waste fuel and cause unnecessary wear on gas-powered engines due to continuous operation, even when only short periods of power are needed or for small loads, as they require full engine activation.
Innovation Solution
An engine-driven welding-type power system employing a permanent magnet generator (PMG) that operates an air compressor independently of the engine, using an energy storage device and controller to manage power and pressure levels, allowing the PMG to drive the air compressor when the engine is off or idling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the engine is activated to provide full power output, then the power system can meet high power demands, but fuel consumption increases and engine wear increases
Solution Approach 1:
The system dynamically switches between engine operation and PMG operation based on real-time power demands. The controller activates the PMG for small loads and short-duration demands, while the engine operates only when high power is required, optimizing the balance between power output and fuel consumption
Solution Approach 2:
The permanent magnet generator acts as an intermediary energy storage and conversion device between the engine and the load. It stores excess energy from the engine and releases it during peak demand or when the engine is off, reducing the need for continuous engine operation and thereby reducing fuel consumption
2Power
If the engine is activated to provide full power output, then the power system can meet high power demands, but engine wear increases
Solution Approach 1:
The system dynamically adjusts the operating mode based on power demand. The controller switches between engine-only operation, PMG-only operation, and hybrid operation to minimize engine runtime while ensuring sufficient power output, thereby extending engine life and improving reliability
Solution Approach 2:
The PMG serves as a mediator that can independently handle small power demands and transient loads. This reduces the frequency and duration of engine activation, minimizing wear and tear on the engine while maintaining the system's ability to meet high power demands when necessary
3Power
If the engine is activated for short periods or small loads, then full power output is available, but the engine must start and reach operational speed
Solution Approach 1:
The PMG is pre-charged with energy from the engine during periods of high demand or when the engine is running. This preliminary energy storage allows the PMG to immediately supply power during short-duration or small-load demands without requiring the engine to start and reach operational speed, eliminating startup delays
4Power
If the engine operates continuously, then power is always available, but fuel is wasted and emissions increase
Solution Approach 1:
The system employs periodic engine operation rather than continuous operation. The controller activates the engine only when high power is needed or when the PMG charge is depleted, and uses the PMG for smaller or intermittent loads. This periodic operation pattern maintains power availability while significantly reducing fuel consumption and emissions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces fuel consumption, noise, and emissions, extends engine life, and decreases maintenance needs by allowing the PMG to provide power only when needed, while maintaining quick responsiveness to demand.
Implementation Method 1
a permanent magnet generator (PMG) to operate an air compressor when the engine is not engaged
Implementation Method 2
An energy storage device and controller are provided in the system
Data Source
AI summary
Systems and methods are disclosed of an engine driven power system that includes a permanent magnet generator electrically connected to an energy storage device. An air compressor is coupled to the permanent magnet generator via a clutch. A controller provides power from the energy storage device to the permanent magnet generator to turn the permanent magnet generator to drive the air compressor via the clutch to increase an air pressure level.