18186515. AVALANCHE PROTECTION CIRCUIT simplified abstract (Infineon Technologies AG)
Contents
AVALANCHE PROTECTION CIRCUIT
Organization Name
Inventor(s)
Benjamin Schmidt of Munich (DE)
AVALANCHE PROTECTION CIRCUIT - A simplified explanation of the abstract
This abstract first appeared for US patent application 18186515 titled 'AVALANCHE PROTECTION CIRCUIT
Simplified Explanation: The patent application describes circuitry and techniques for detecting and disconnecting a main switch comprising multiple smaller MOSFET switches connected in parallel to prevent circuit malfunctions.
- The circuit includes a protection circuit switch with a protection switch in parallel to the main switch.
- The protection switch circuit is designed to dissipate energy stored in the cable harness as inductance after the main switch shuts off power to a load, preventing current flow through the main switch MOSFETs.
- By relieving the main switch MOSFETs of stored energy, the protection circuit helps avoid avalanche events in the MOSFETs.
- The protection circuit increases current shortly after the main switch turns off to prevent break-down voltages misalignment in the main switch MOSFETs.
Key Features and Innovation:
- Detection and disconnection of a main switch with multiple MOSFET switches in parallel.
- Protection circuit switch with a protection switch in parallel to the main switch.
- Dissipation of stored energy in the cable harness to prevent current flow through the main switch MOSFETs.
- Prevention of avalanche events in the MOSFETs by relieving stored energy.
- Increased current after main switch turn-off to align break-down voltages in the MOSFETs.
Potential Applications: The technology can be applied in various electrical systems and devices where multiple MOSFET switches are used in parallel to prevent circuit malfunctions and protect against avalanche events.
Problems Solved: The technology addresses the issue of energy stored in the cable harness causing continued current flow through the main switch MOSFETs after shut-off, potentially leading to avalanche events and circuit malfunctions.
Benefits:
- Enhanced protection against circuit malfunctions.
- Prevention of avalanche events in MOSFETs.
- Improved reliability and safety in electrical systems.
Commercial Applications: Potential commercial applications include power distribution systems, electric vehicles, renewable energy systems, and industrial automation where multiple MOSFET switches are used in parallel to control power flow.
Questions about Circuit Malfunction Detection and Main Switch Disconnection: 1. How does the protection circuit switch work to prevent current flow through the main switch MOSFETs? 2. What are the potential consequences of not dissipating the stored energy in the cable harness after the main switch shuts off?
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Original Abstract Submitted
Circuitry and techniques for detecting a circuit malfunction and disconnecting a main switch when the main switch comprises two or more smaller MOSFET switches connected in parallel. The circuitry of this disclosure includes a protection circuit switch using a protection switch arranged in parallel to the main switch. The protection switch circuit is configured to relieve the main switch MOSFETs as energy dissipates after the main switch circuit detects a fault and shuts off power to a load, but energy stored in the cable harness as inductance may cause current to continue to flow through the main switch MOSFETS. Dissipating this stored energy may result in an avalanche event in MOSFETs of the main switch. The protection circuit of this disclosure take more current shortly after the main switch turns OFF when the break-down voltages of the main switch MOSFETs may not be aligned.
