Patent ID: 7359166
Filing Date: 2008-04-15
Classification: H02H,H02P

Abstract:
1. A method for the safety management of a boat thruster control system, said thruster control system controlling an electric thruster motor for a thruster, said motor connected via an operating relay to a supply voltage source, said thruster control system comprising: a manually operated control means for commanding the motor to drive the thruster to selectively move the boat in a port direction or a starboard direction; said manually operated control means providing one of a first control signal or a second control signal respectively representing one of said port direction or said starboard direction; said first and said second control signals controlling said operating relay having first and second relay windings, and actuating first and second relay contacts making said motor run in a first or second direction respectively; said method comprising: voltage level to both terminals of the motor, thereby interrupting the current to the motor; and