Abstract: An electric power system includes electric energy sources and control equipment for controlling the electric energy sources in accordance with a target value of electric power produced by the electric power system. The control equipment activates and deactivates the electric energy sources based on a control value and on activation and deactivation limits. The control value can be the target value or the actual value of the electric power. The control equipment controls active electric energy sources according to the target value and according to power sharing defined for the active electric energy sources. The activation and deactivation limits as well as activation and deactivation order of the electric energy sources can be determined based on properties of the electric energy sources and on a prevailing operational situation of the electric power system.

Abstract: An electric power system includes electric energy sources and control equipment for controlling the electric energy sources in accordance with a target value of electric power produced by the electric power system. The control equipment activates and deactivates the electric energy sources based on a control value and on activation and deactivation limits. The control value can be the target value or the actual value of the electric power. The control equipment controls active electric energy sources according to the target value and according to power sharing defined for the active electric energy sources. The activation and deactivation limits as well as activation and deactivation order of the electric energy sources can be determined based on properties of the electric energy sources and on a prevailing operational situation of the electric power system.

Abstract: An electric power system comprises electric energy sources (106-110) and control equipment (101) for controlling the electric energy sources in accordance with a target value of electric power produced by the electric power system. The control equipment activates and deactivates the electric energy sources based on a control value and on activation and deactivation limits. The control value can be the target value or the actual value of the electric power. The control equipment controls active electric energy sources according to the target value and according to power sharing defined for the active electric energy sources. The activation and deactivation limits as well as activation and deactivation order of the electric energy sources can be determined based on properties of the electric energy sources and on a prevailing operational situation of the electric power system.

Abstract: An electromechanical power transmission chain comprises an electric machine (110) mechanically connectable to a combustion engine (111) and to one or more actuators (114) to be driven, an energy-storage (118) for storing electric energy, converter equipment (115) for driving the electric machine in a torque controlled mode when transferring electric energy between the electric machine and the energy-storage, and a device (101) for producing a torque reference for the electric machine. The device produces a control value based on electric energy stored by the energy-storage so that the control value is a decreasing function of the stored electric energy, and produces the torque reference based on a difference between the control value and a control signal indicative of torque produced by the combustion engine.

Abstract: A bearing housing structure (101) comprises a support section (102) for supporting a bearing (117), a reception interface (103) for receiving lubrication grease, and grease channels (104-106) for conducting the lubrication grease to both sides of the bearing which are mutually opposite in the axial direction of the bearing. The bearing housing structure comprises exit conduits (107, 108) for allowing the lubrication grease to exit the bearing from the both sides of the bearing and a grease reservoir (109) for storing the lubrication grease exiting the bearing via one or more of the exit conduits. The bearing housing structure is capable of operating in different positions so that the axial direction of the bearing can be horizontal, vertical, or slanting.

Abstract: An electric power system comprises electric energy sources (106-110) and control equipment (101) for controlling the electric energy sources in accordance with a target value of electric power produced by the electric power system. The control equipment activates and deactivates the electric energy sources based on a control value and on activation and deactivation limits. The control value can be the target value or the actual value of the electric power. The control equipment controls active electric energy sources according to the target value and according to power sharing defined for the active electric energy sources. The activation and deactivation limits as well as activation and deactivation order of the electric energy sources can be determined based on properties of the electric energy sources and on a prevailing operational situation of the electric power system.

Abstract: An electromechanical power transmission chain comprises an electric machine (110) mechanically connectable to a combustion engine (111) and to one or more actuators (114) to be driven, an energy-storage (118) for storing electric energy, converter equipment (115) for driving the electric machine in a torque controlled mode when transferring electric energy between the electric machine and the energy-storage, and a device (101) for producing a torque reference for the electric machine. The device produces a control value based on electric energy stored by the energy-storage so that the control value is a decreasing function of the stored electric energy, and produces the torque reference based on a difference between the control value and a control signal indicative of torque produced by the combustion engine.

Abstract: A working machine includes a combustion engine (101), an electromechanical power transmission chain (102) between the combustion engine and one or more actuators (109) of the working machine, an electrical connector system (103) for connecting to an external electrical power network (110), and an electronic power converter (104) for transferring electrical energy from the electromechanical power transmission chain to the external electrical power network and from the external electrical power network to the electromechanical power transmission chain. The working machine can be used as an auxiliary power plant for increasing reliability and capacity of power supply. On the other hand, the working machine can be energized merely by the external electrical power network when the capacity of the electrical power network is sufficient and when it is more cost-effective to use the electrical power network than to use the combustion engine.

Abstract: A bearing housing structure (101) comprises a support section (102) for supporting a bearing (117), a reception interface (103) for receiving lubrication grease, and grease channels (104-106) for conducting the lubrication grease to both sides of the bearing which are mutually opposite in the axial direction of the bearing. The bearing housing structure comprises exit conduits (107, 108) for allowing the lubrication grease to exit the bearing from the both sides of the bearing and a grease reservoir (109) for storing the lubrication grease exiting the bearing via one or more of the exit conduits. The bearing housing structure is capable of operating in different positions so that the axial direction of the bearing can be horizontal, vertical, or slanting.

Abstract: An electromechanical drive comprises an electrical machine (101a), an electrical power converter (103) for converting voltage of an external electrical system to voltage suitable for the electrical machine, and a gearbox (111a) for mechanically connecting the electrical machine to an actuator (112a) and capable of providing selectable transmission ratios between the electrical machine and the actuator. The electrical power converter comprises a controller for selecting one of the selectable transmission ratios at least partly on the basis of a) first data related to actual and/or desired torque-speed operating point of the actuator and b) second data related to functional properties of at least the electrical machine. Thus, the transmission ratio can be selected at least partly from the viewpoint of the electrical machine taking into account for example the most advantageous speed range and/or torque range of the electrical machine.

Abstract: An electromechanical drive comprises an electrical machine (101a), an electrical power converter (103) for converting voltage of an external electrical system to voltage suitable for the electrical machine, and a gearbox (111a) for mechanically connecting the electrical machine to an actuator (112a) and capable of providing selectable transmission ratios between the electrical machine and the actuator. The electrical power converter comprises a controller for selecting one of the selectable transmission ratios at least partly on the basis of a) first data related to actual and/or desired torque-speed operating point of the actuator and b) second data related to functional properties of at least the electrical machine. Thus, the transmission ratio can be selected at least partly from the viewpoint of the electrical machine taking into account for example the most advantageous speed range and/or torque range of the electrical machine.

Abstract: A working machine includes a combustion engine (101), an electromechanical power transmission chain (102) between the combustion engine and one or more actuators (109) of the working machine, an electrical connector system (103) for connecting to an external electrical power network (110), and an electronic power converter (104) for transferring electrical energy from the electromechanical power transmission chain to the external electrical power network and from the external electrical power network to the electromechanical power transmission chain. The working machine can be used as an auxiliary power plant for increasing reliability and capacity of power supply. On the other hand, the working machine can be energized merely by the external electrical power network when the capacity of the electrical power network is sufficient and when it is more cost-effective to use the electrical power network than to use the combustion engine.