OSAEI Project Repository - Project ID 6
Solid-State Starter Relay

Project status: Pre-Design Discussions. Last updated on 0000-00-00 00:00:00. File repository contains files.

Synopsis

Simple SPST switching for extreme-power (150A) loads

 

Full Description

The Solid-State Relay is a universal direct replacement for high-current contactor-style SPST switching devices rated for 150 amperes or less. While this project does not include normally-closed contacts, the vast majority of relay applications in the context of a vehicle only use the normally-open contacts even if the relay is constructed in a SPDT configuration. The universal design of this project allows its use with high-side or low-side switching, and the operating safety margin is well in excess of the standard fusing currents for extreme loads such as starters.

 

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Design Goals

This project includes the following design goals in addition to, or in substitution of, the standard project design rules for Initiative projects:

• Relay coil leads must not be polarity-specific.
• N.O. contacts must not be polarity-specific. Bidirectional switching is required.
• Relay's coil and switched sides must be isolated.
• Current safety margin must exceed 3:1 (450A minimum).
• In addition to surviving load dumps, switched side must survive significant back-EM spikes from breaking current flow through inductive loads.

 

File Repository

File Repository is currently off-line.

 

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