The present invention relates to a system for controlling rotational speed on a rotating process machine, which for example is a turbine or a propeller, where the rotating process machine is connected to at least one motor and arranged to rotate with a given rotational speed given by the motor, the motor is connected to a control system and the rotational speed of the motor is arranged to be controlled by a control system. The rotating process machine comprises a load control arranged to be adaptable, the control system is connected to the rotating process machine. With the invention, one achieves soft transitions between several selectable rotational speeds and lower energy consumption by step by step adjusting the size and the rotational speed of the motor to varying energy requirement.

The present invention relates to a system for controlling rotational speed on a rotating process machine, which for example is a turbine or a propeller, where the rotating process machine is connected to at least one motor and arranged to rotate with a given rotational speed given by the motor, the motor is connected to a control system and the rotational speed of the motor is arranged to be controlled by a control system. The rotating process machine comprises a load control arranged to be adaptable, the control system is connected to the rotating process machine. With the invention, one achieves soft transitions between several selectable rotational speeds and lower energy consumption by step by step adjusting the size and the rotational speed of the motor to varying energy requirement.

Electric starter for internal combustion engine comprising: an electric motor (M) combined with means (R, L) for driving the internal combustion engine and an electronic filter (10) that is arranged on a power circuit (3) of the electric motor (M) that is suitable for at least reducing the electromagnetic disturbance caused by the operation of the electric motor (M). The electronic filter (10) is placed inside a cover (11, 30) of the starter.

A method includes user actuating X and Y transducers (16, 17, 38A, 39A, 66, 422A, 704A) to selective X and Y positions; producing x and y electrical signals as functions of the positions; moving a cursor (388) of a display (390) at velocities that are functions of the x and y electrical signals; clicking the cursor (388); correcting initialization errors in one of the transducers; providing a deadband (288A, 288B) in which the moving step is obviated; selectively adjusting the deadband (288A, 288B); delaying transmission of one of the electrical signals to the cursor (388); and stopping the moving step irrespective of the delaying step. The clicking step comprises user actuating one of the transducers (16, 17, 38A, 39B, 66, 422A, 704A) more rapidly; user actuating a manual switch (372, 550, 551); user actuating a sound pressure switch (432); user actuating a voice recognition IC (394), or user actuating an another switching device (384).

A drive device for a vehicle, in particular a rail vehicle, includes a set of drive units each having at least one electric traction motor and a power generation unit which is provided for generating power for the traction motor, and a set of motor contactor units each being assigned to a traction motor. In order to provide a type of drive device which has a high availability in the event of a failure, has few structural elements and can be produced economically, at least one motor contactor unit includes at least one switching device which is connected between the power generation unit for the associated traction motor and a feed point.

A current command generator 117 generates a current command that indicates a value of current supplied from an inverter circuit to electric motors connected in parallel with the inverter circuit. A voltage command calculator 120 generates a voltage compensation signal for compensating a difference between a value of actual current supplied to each of the electric motors and a value of current indicated by the current command. A determiner 135 determines, based on a value obtained from the voltage compensation signal, whether or not an abnormality is occurring in at least one of the electric motors. A shutdown controller 136 shuts down, upon the determiner 135 determining that an abnormality is occurring, the power supply from the inverter circuit to the each of the electric motors.

An electric movable body includes an output shaft and multiple motors that drive the output shaft. The electric movable body performs a double drive control to assign a drive state to at least two of the motors, performs, when the double drive control is performed and on determination that one of the motors is abnormal, a single drive control to assign the drive state to only one of the motors and to assign a stop state to another of the motors, and identifies, when the single drive control is performed, a drive motor, to which the drive state is assigned and which is abnormal, based on a predetermined state quantity correlated with a drive state of the drive motor.

A drive device includes a power converter, a first magnetic pole position identification unit, a second magnetic pole position identification unit, a subtractor, and a current control unit. The power converter supplies power to a main-side synchronous motor and a sub-side synchronous motor connected in parallel. The subtractor obtains an angular difference using the magnetic pole position of the rotor of the main-side synchronous motor identified by the first magnetic pole position identification unit and the magnetic pole position of the rotor of the sub-side synchronous motor identified by the second magnetic pole position identification unit. A magnetic flux current command compensation unit adjusts the absolute value of a magnetic flux current command based on the angular difference. The current control unit controls the power converter using a torque current command and the magnetic flux current command with the absolute value adjusted by the magnetic flux current command compensation unit.

A drive device (100) includes a power converter (2), a magnetic pole position identification unit (5a), a magnetic pole position identification unit (5b), a subtractor (8), and a current control unit (6). The power converter (2) supplies power to a main-side synchronous motor (1a) and a sub-side synchronous motor (1b) connected in parallel. The subtractor (8) obtains an angular difference () using the magnetic pole position of the rotor of the main-side synchronous motor (1a) identified by the magnetic pole position identification unit (5a) and the magnetic pole position of the rotor of the sub-side synchronous motor (1b) identified by the magnetic pole position identification unit (5b). A magnetic flux current command compensation unit (10) adjusts the absolute value of a magnetic flux current command (i.sub.d*) based on the angular difference (). The current control unit (6) controls the power converter (2) using a torque current command (i.sub.q*) and the magnetic flux current command (i.sub.d*) with the absolute value adjusted by the magnetic flux current command compensation unit (10).

A power system that is for any vehicle (land, sea or air) and or any device/item/thing that consumes electricity. This may also be used as a method to produce electricity to be sold. It may also be used as a system to charge a large battery or, 2 or more batteries. The power system would be scaled to the appropriate size depending on application. The design is configured in such a way that the electricity produced is enough to power any electric motor or motors of any voltage and/or amperage or power anything that consumes electricity. The design is also configured in such a way that the electricity/energy produced is continuous and does not stop until the system is switched off. The system may be wired in series, in parallel or both depending on application and energy requirements.