Static Starter Detection Logic for Semiconductor Switch Monitoring
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Solution Overview
Problem
Existing static starter systems face difficulties in detecting non-conducting solid state semiconductor switches during operation, leading to complex troubleshooting and equipment downtime, as they require operators to power off the system and use trial-and-error methods to identify faulty switches.
Innovation Solution
Incorporating detection logic within the static starter system that includes a logic gate to evaluate input signals indicating the switch's state, gate firing command, and conductivity, allowing for real-time monitoring of solid state semiconductor devices and quick identification of non-conducting switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If operators use trial-and-error testing with multimeters to identify non-conducting switches, then they can detect faulty switches, but the process requires powering off the system and causes equipment downtime
Solution Approach 1:
The system performs preliminary detection of switch conductivity states during normal operation before faults develop or while the system is still running. The detection circuit continuously monitors each switch's conductive state, allowing operators to identify problematic switches without needing to power off the system for testing.
Solution Approach 2:
The detection circuit provides real-time feedback signals to the control circuit whenever a switch fails to conduct properly. This feedback mechanism enables continuous monitoring and immediate identification of faulty switches during operation, eliminating the need for manual trial-and-error testing and reducing equipment downtime.
2Reliability
If operators manually test each solid state switch using multimeters, then they can identify non-conducting switches, but the troubleshooting procedure becomes complex and time-consuming
Solution Approach 1:
The system performs self-diagnosis by automatically detecting and identifying non-conducting switches through integrated detection circuits. Each switch's conductive state is monitored independently, and the system autonomously generates identification signals for faulty switches, eliminating the need for operators to perform complex manual testing procedures.
Solution Approach 2:
The detection system is segmented into individual detection circuits for each solid state switch, allowing independent monitoring of each component. This segmentation enables the system to precisely identify which specific switch is faulty without requiring systematic trial-and-error testing of entire strings or groups of switches.
3Productivity
If the system continuously monitors all solid state switches in real-time, then non-conducting switches can be quickly identified, but the detection system complexity increases
Solution Approach 1:
The detection functions are merged into the existing control circuit of the static starter system. The detection circuit utilizes the same control architecture and signaling infrastructure already present in the system, integrating fault detection capabilities without adding separate independent monitoring systems or increasing overall system complexity.
Data Source
AI summary
A system, in one embodiment, may include a static starter subsystem having detection logic for indicating a conductive state of a solid state semiconductor device. The detection logic includes a first logic gate having a first input that receives a first input signal indicating a state of the static starter subsystem, a second input that receives a second input signal indicating a state of a gate firing command being applied to the solid state semiconductor device, and a third input that receives a third input signal indicating whether the solid state semiconductor device is conducting. The first logic gate may be configured to evaluate the first, second, and third input signals and provide a first output signal indicating conductivity of the solid state semiconductor device in response to the gate firing command.