Abstract: An electric steering system (1) including a steering device (40), an actuating device (30) and a related method for controlling the electric steering system. The steering device (40) is configured to transmit steering signals in response to user operations. The actuating device (30) is configured to control the electric motor (301) to rotate a link arm (202) according to the steering signal, bringing the rotatable assembly (203) to rotate along an axis of the ship propulsion apparatus (20), thereby adjusting an orientation of the propeller (2034). The actuating device (30) is rotatably coupled to an end of the link arm (202).

Abstract: An underwater propulsion apparatus includes a motor and a control system for controlling the motor. The control system includes a remote controller and a motor driving device, wirelessly communicating with the remote controller. The motor driving device includes a communication repeater module and a motor driving module. The communication repeater module is configured for detecting interruptions or non-receipt of a wireless signal transmitted by the remote controller. Wireless signals to the motor driving module are transmitted by the remote controller to the communication repeater module. The motor driving module is configured for receiving the wireless signal, and outputs a driving signal for driving the motor according to the wireless signal, the motor driving module shutting down when no signal is received.

Abstract: A closed-loop cooling ship propulsion apparatus includes a power device, a pump, and a coolant supply. A fluid circuit is formed in the ship propulsion apparatus and a coolant in the loop can be arranged to circulate through all heat-generating components in addition to the pump and motive power unit. A closed-loop circuit avoids the blockages and contamination which might occur if the water of a sea or lake was used directly.

Abstract: An underwater propulsion apparatus includes a motor and a control system for controlling the motor. The control system includes a remote controller and a motor driving device, wirelessly communicating with the remote controller. The motor driving device includes a communication repeater module and a motor driving module. The communication repeater module is configured for detecting interruptions or non-receipt of a wireless signal transmitted by the remote controller. Wireless signals to the motor driving module are transmitted by the remote controller to the communication repeater module. The motor driving module is configured for receiving the wireless signal, and outputs a driving signal for driving the motor according to the wireless signal, the motor driving module shutting down when no signal is received.

Abstract: A closed-loop cooling ship propulsion apparatus includes a power device, a pump, and a coolant supply. A fluid circuit is formed in the ship propulsion apparatus and a coolant in the loop can be arranged to circulate through all heat-generating components in addition to the pump and motive power unit. A closed-loop circuit avoids the blockages and contamination which might occur if the water of a sea or lake was used directly.