Marine propulsion system and control method
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorYuta Miyagi
Life of this patent
Estimating the term…
Abstract
A marine propulsion system includes marine propulsion devices each including a propeller shaft, an engine, an electric motor, a power transmission, an inverter, a voltage sensor, and a controller. The power transmission transmits mechanical power to the propeller shaft from at least one of the engine and the electric motor. The inverter outputs electric power inputted thereto to the electric motor after converting the electric power. The voltage sensor detects induced voltage generated by the electric motor. The controller executes a protection control to protect the inverter when the induced voltage is greater than a first threshold while the electric motor is not being driven.
Claims15
A marine propulsion system comprising:
- a plurality of marine propulsion devices each including:
- a propeller shaft;
- an engine;
- an electric motor;
- a power transmission to transmit mechanical power to the propeller shaft from at least one of the engine and the electric motor;
- an inverter to output electric power inputted thereto to the electric motor after converting the electric power;
- a voltage sensor to detect an induced voltage generated by the electric motor;
- and
- a controller configured or programmed to execute a protection control to protect the inverter when the induced voltage is greater than a first threshold while the electric motor is not being driven.
A method of controlling a marine propulsion system, the marine propulsion system including a plurality of marine propulsion devices each including a propeller shaft, an engine, an electric motor, a power transmission to transmit mechanical power to the propeller shaft from at least one of the engine and the electric motor, and an inverter to output electric power inputted thereto to the electric motor after converting the electric motor, the method comprising:
- detecting an induced voltage generated by the electric motor;
- and
- executing a protection control to protect the inverter when the induced voltage is greater than a first threshold while the electric motor is not being driven.
A marine propulsion system comprising:
- a plurality of marine propulsion devices each including:
- a propeller shaft;
- an electric motor;
- a power transmission to transmit mechanical power to the propeller shaft from the electric motor;
- an inverter to output electric power inputted thereto to the electric motor after converting the electric power;
- a voltage sensor to detect an induced voltage generated by the electric motor;
- and
- a controller configured or programmed to execute a protection control to protect the inverter when the induced voltage is greater than a first threshold while the electric motor is not being driven.
Dependencies are inferred from the claim text.