Permanent Magnet Generator Engine Starting System
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Solution Overview
Problem
Conventional welding-type power systems require a starter battery to start the engine, increasing cost and complexity, and there is a need for a system that can initiate engine startup without a starter battery.
Innovation Solution
An engine-driven welding-type power system employs a permanent magnet generator (PMG) coupled to an energy storage device, with a controller managing power distribution to start the engine based on demand, eliminating the need for a starter battery by using the PMG to generate power for engine startup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a starter battery is used to start the engine, then the engine can be started reliably, but the system cost and complexity increase
Solution Approach 1:
The patent extracts the starting function from the traditional starter battery system and transfers it to the permanent magnet generator. The PMG is mechanically coupled to the engine and can directly drive the engine crankshaft to initiate rotation, eliminating the need for a separate starter battery while maintaining reliable engine starting capability
Solution Approach 2:
The permanent magnet generator serves dual functions: it acts as a starting motor to initiate engine rotation and simultaneously functions as a power generation device to produce electrical power when the engine is running. This multi-functionality eliminates the need for a dedicated starter battery and reduces overall system complexity
2Ease of operation
If a starter battery is added to the system, then the engine can be started, but maintenance and replacement costs increase
Solution Approach 1:
The starting capability is extracted from the battery system and integrated into the permanent magnet generator, which is already a core component of the system. This eliminates the starter battery and its associated maintenance requirements while preserving the essential engine starting function
3Ease of operation
If a starter battery is included in the system, then engine starting is enabled, but system mobility is reduced
Solution Approach 1:
The heavy starter battery is removed from the system and replaced by the permanent magnet generator, which provides the same starting function without the weight penalty. The PMG uses the engine's own rotational momentum and mechanical coupling to start the engine, eliminating the need for heavy battery packs
Solution Approach 2:
The permanent magnet generator serves as both a starting device and a power generation device, replacing the need for a separate starter battery. This multi-functional approach significantly reduces system weight while maintaining full engine starting capability
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 maintenance and replacement costs by allowing the engine to start without a starter battery, utilizing the PMG to provide power for engine initiation, enhancing system simplicity and mobility.
Implementation Method 1
a permanent magnet generator (PMG) coupled to the engine
Data Source
AI summary
Systems and methods are disclosed of an engine driven power system that includes a permanent magnet generator coupled to the engine. An energy storage device is connected to the permanent magnet generator. A controller controls the energy storage device to provide power to the permanent magnet generator to start the engine.