A method for starting and stopping an asynchronous motor by way of a soft starter. The method includes the following steps: determining ignition options of one or more thyristors of the soft starter that are possible at a future calculation time; predicting the motor behavior for the determined ignition options, if an ignition of one or more thyristors of the soft starter is carried out; based on the predicted motor behavior, deciding whether an ignition option is to be selected and which is to be selected; and generating one or more ignition signals for one or more thyristors, if the decision for an ignition option has been made.

The present disclosure provides a single phase motor driving circuit which includes a stator winding, a control unit, a controllable bidirectional AC switch, and two power input terminals configured to connect an AC power source. The stator winding includes a first winding and a second winding. The parallel-connected first winding and second winding and the controllable bidirectional AC switch are connected in series between the two power input terminals. The control unit is connected to a control electrode of the controllable bidirectional AC switch, to control the controllable bidirectional AC switch to be switched on and off. The present disclosure further provides a driving method for the single phase motor driving circuit. The single phase motor driving circuit and the driving method thereof has better reliability while ensuring sufficient starting torque.

The present disclosure provides a single phase motor driving circuit which includes a stator winding, a control unit, a controllable bidirectional AC switch, and two power input terminals configured to connect an AC power source. The stator winding includes a first winding and a second winding. The parallel-connected first winding and second winding and the controllable bidirectional AC switch are connected in series between the two power input terminals. The control unit is connected to a control electrode of the controllable bidirectional AC switch, to control the controllable bidirectional AC switch to be switched on and off. The present disclosure further provides a driving method for the single phase motor driving circuit. The single phase motor driving circuit and the driving method thereof has better reliability while ensuring sufficient starting torque.

A propulsion system for an unmanned underwater vehicle includes a turbine engine, a generator mechanically coupled to an output shaft of the turbine engine, an electrical motor mechanically decoupled from the turbine engine and electrically coupled to the generator via a power bus architecture, and a propulsor mechanically coupled to a rotational output of the electrical motor. The power bus architecture includes a pair of AC buses and a DC bus.

A propulsion system for an unmanned underwater vehicle includes a turbine engine, a generator mechanically coupled to an output shaft of the turbine engine, an electrical motor mechanically decoupled from the turbine engine and electrically coupled to the generator via a power bus architecture, and a propulsor mechanically coupled to a rotational output of the electrical motor. The power bus architecture includes a pair of AC buses and a DC bus.

A propulsion system for an unmanned underwater vehicle includes a turbine engine, a generator mechanically coupled to an output shaft of the turbine engine, an electrical motor mechanically decoupled from the turbine engine and electrically coupled to the generator via a power bus architecture, and a propulsor mechanically coupled to a rotational output of the electrical motor. The power bus architecture includes a pair of AC buses and a DC bus.

A propulsion system for an unmanned underwater vehicle includes a turbine engine, a generator mechanically coupled to an output shaft of the turbine engine, an electrical motor mechanically decoupled from the turbine engine and electrically coupled to the generator via a power bus architecture, and a propulsor mechanically coupled to a rotational output of the electrical motor. The power bus architecture includes a pair of AC buses and a DC bus.

A propulsion system for an unmanned underwater vehicle includes a turbine engine, a generator mechanically coupled to an output shaft of the turbine engine, an electrical motor mechanically decoupled from the turbine engine and electrically coupled to the generator via a power bus architecture, and a propulsor mechanically coupled to a rotational output of the electrical motor. The power bus architecture includes a pair of AC buses and a DC bus.

A propulsion system for an unmanned underwater vehicle includes a turbine engine, a generator mechanically coupled to an output shaft of the turbine engine, an electrical motor mechanically decoupled from the turbine engine and electrically coupled to the generator via a power bus architecture, and a propulsor mechanically coupled to a rotational output of the electrical motor. The power bus architecture includes a pair of AC buses and a DC bus.

A system and computer-implemented method for improving controlling the operation of an alternating current electric motor using programmable multiplexed tap input logic. Programmed bit patterns and corresponding tap numbers are stored in a look-up table in a non-volatile electronic read-write memory element. Input channels are monitored for tap input signals, and an input bit pattern is formed based on the tap input signals. The input bit pattern is compared to the programmed bit patterns, and if the input bit pattern matches a particular programmed bit pattern, then a control signal is transmitted to activate the particular tap number which corresponds to the particular programmed bit pattern, thereby controlling the operation of the motor. If there is no active tap, then the motor is turned off. The programmed bit patterns and/or the corresponding tap numbers may be changed by writing to the look-up table in the non-volatile electronic read-write memory element.