Brunswick Corporation

Jacob A Yadon

Michael P Dengel

John R Boatman

Daniel R Kletti

A marine propulsion system includes an electric marine drive comprising an electric motor powered by a power storage system, a link capacitor connected to the electric motor in parallel with the power storage system, and a high current switch positioned in a main current path between the power storage system and the electric motor and configured to have an on state that allows sufficient current to flow from the power storage system to power the electric motor and an off state that blocks bidirectional current flow along the main current path. A current limiting circuit is positioned in parallel with the high current switch and is configured to provide a controlled current to charge the link capacitor while the high current switch remains in the off state and may also be configured to control current flow from the link capacitor to the power storage system to recover power from the link capacitor while the high current switch remains in the off state.

Marine propulsion system with pre-charge and discharge circuit

A system for driving an analog gauge that displays an indication of a condition of a vehicle has a microcontroller that receives signals representing a voltage at a sender terminal of the analog gauge and the condition of the vehicle. The microcontroller determines a desired resistance based on the condition of the vehicle and a current command signal based on the desired resistance and the voltage at the sender terminal. The microcontroller sends the current command signal to a current driver circuit to command a flow of current. The current driver circuit is coupled to the sender terminal and has a virtual resistance simulated by the flow of current through the current driver circuit and the voltage at the sender terminal. The analog gauge is driven according to the virtual resistance of the current driver circuit and displays the indication of the condition of the vehicle.

Growing community of inventors

Fond du Lac, WI, United States of America

Jacob A Yadon