Hybrid Power Relay Serial Control Arc Suppression
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Solution Overview
Problem
Existing power-switching devices face challenges with contact degradation due to electrical arcing and require cumbersome heat dissipation in solid-state devices, while arc suppression circuits lack flexibility in adjusting operating characteristics to varying conditions.
Innovation Solution
A control circuit utilizing a serial communication link to provide information to a microprocessor, which generates control output signals to manage an arc suppression circuit, allowing for adaptable operation across different conditions and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If mechanical relays are used for power switching, then on-state power dissipation is low due to low ohmic resistance of metallic contacts, but contact material degrades due to electrical arcing during make and break operations
Solution Approach 1:
A serial communication link acts as an intermediary between the microprocessor and the arc suppression circuit, enabling indirect control of the power-switching device. This allows the microprocessor to adjust operating characteristics dynamically without direct mechanical contact, reducing wear while maintaining low power dissipation.
Solution Approach 2:
The arc suppression circuit's operating characteristics are made dynamically adjustable through serial communication control. The microprocessor can modify timing and circuit parameters in real-time based on operating conditions, optimizing the balance between contact protection and power efficiency.
2Reliability
If solid-state switching devices are used for power control, then contact degradation from arcing is eliminated, but significant power dissipation requires bulky and expensive heat dissipation devices
Solution Approach 1:
The hybrid power relay combines mechanical relay contacts with solid-state arc suppression circuitry in a single device. This multi-functional approach allows the system to benefit from both the low power dissipation of mechanical contacts and the durability of solid-state components, eliminating the need for bulky heat sinks.
Solution Approach 2:
The invention creates a composite switching system that integrates mechanical and solid-state elements. The mechanical contacts handle primary power switching with low loss, while the solid-state arc suppression circuit protects against contact degradation, achieving both low power dissipation and high reliability.
3Reliability
If discrete circuitry is used for arc suppression, then the power-switching device is protected from arc damage, but the circuit cannot be adjusted to meet various operating conditions
Solution Approach 1:
The serial communication link enables feedback control of the arc suppression circuit. The microprocessor receives information about operating conditions and adjusts the arc suppression circuit's timing and parameters accordingly, maintaining effective protection while adapting to varying operational requirements.
Solution Approach 2:
The arc suppression circuit transitions from static discrete circuitry to a dynamically controllable system. Serial communication enables the microprocessor to modify circuit timing and characteristics in real-time, providing adaptability to different operating conditions while maintaining arc protection effectiveness.
Data Source
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AI summary
A control circuit for controlling an arc suppression circuit includes a serial communication link communicating a serial signal therethrough. The control circuit includes a microprocessor having a serial input communicating with the serial communication link. The microprocessor generates a control output signal in response to the serial signal. The control circuit further includes the arc suppression circuit having an electrical contact and operating in response to the control output signal to reduce an arc at the electrical contact.