An apparatus and a method for controlling energy consumption in a marine vessel having a plurality of energy consuming users and fuel consuming engines are disclosed. According to the invention the apparatus comprises a voyage management tool (2) for plann...

An arrangement in connection with an electric drive system, the electric drive system comprising an intermediate circuit (DC), with two or more supply units (S.1-S .n ) and two or more inverter units (I.1-I .n ) connected thereto, and an electric machine (...

An arrangement which comprises two or more energy storage units (1) for electrical energy connected in series, two or more balancing resistor units (2), each balancing resistor unit (2) connected in parallel with one of the energy storage units (1), means ...

An arrangement for controlling frequency converter modules of an electric drive, in which arrangement the frequency converter modules are arranged to control alternatively a first motor (M.1) or several motors (M.2 to M. k ) having less power than the firs...

A frequency converter comprising a housing (2), frequency converter means (4) installed in the housing (2), control means (6) for controlling the frequency converter means (4), and user interface means (8) for transmitting control commands from a user to t...

A method in connection with a network inverter, an LCL network filter (3) being connected between the network inverter (1) and network (2), and the network inverter being arranged to operate as an active converter of harmonic components of electricity, and...

A method in connection with a network converter, and a network converter, the network converter comprising two or more network converter modules coupled in parallel, and first control means for controlling the network converter modules. The method comprise...