The disclosure relates to a linear actuator including a base, a linear motor, a load cell and a rotary motor. The linear motor is disposed on the base and includes a fixed coil module and a movable magnetic backplane. The fixed coil module is fixed on the base, and the movable magnetic backplane is configured to slide relative to the fixed coil module along a first direction. The rotary motor is rotated around a central axis in parallel with the first direction. The load cell has two opposite sides parallel to the first direction, respectively. The movable magnetic backplane of the linear motor and the rotary motor are connected to the two opposite sides of the load cell, respectively. The load cell is subjected to a force applied thereto by the rotary motor and parallel to the first direction, and configured to convert the force into an electrical signal.

The disclosure relates to a linear actuator including a base, a linear motor, a load cell and a rotary motor. The linear motor is disposed on the base and includes a fixed coil module and a movable magnetic backplane. The fixed coil module is fixed on the base, and the movable magnetic backplane is configured to slide relative to the fixed coil module along a first direction. The rotary motor is rotated around a central axis in parallel with the first direction. The load cell has two opposite sides parallel to the first direction, respectively. The movable magnetic backplane of the linear motor and the rotary motor are connected to the two opposite sides of the load cell, respectively. The load cell is subjected to a force applied thereto by the rotary motor and parallel to the first direction, and configured to convert the force into an electrical signal.

A rotary electric machine unit includes: a first rotary electric machine having a first rotation axis extending in a horizontal direction; a second rotary electric machine having a second rotation axis extending in parallel with the first rotation axis and positioned lower than the first rotation axis; a first rotation speed detection device arranged at a position overlapping with the first rotary electric machine as viewed from an axial direction; a second rotation speed detection device arranged at a position overlapping with the second rotary electric machine as viewed from the axial direction; and a refrigerant supply portion configured to supply refrigerant to the first rotary electric machine. The first rotation speed detection device and the second rotation speed detection device are arranged on one axial end side of the first rotary electric machine and the second rotary electric machine in the axial direction.

A rotary electric machine unit includes: a first rotary electric machine having a first rotation axis extending in a horizontal direction; a second rotary electric machine having a second rotation axis extending in parallel with the first rotation axis and positioned lower than the first rotation axis; a first rotation speed detection device arranged at a position overlapping with the first rotary electric machine as viewed from an axial direction; a second rotation speed detection device arranged at a position overlapping with the second rotary electric machine as viewed from the axial direction; and a refrigerant supply portion configured to supply refrigerant to the first rotary electric machine. The first rotation speed detection device and the second rotation speed detection device are arranged on one axial end side of the first rotary electric machine and the second rotary electric machine in the axial direction.

A flywheel assembly for a renewable energy generation system includes a flywheel housing defining a cavity therein, a flywheel rotatably disposed within the cavity of the flywheel housing, where the flywheel is simultaneously formed from the same component as the flywheel housing, a magnetic levitation disk defining opposed upper and lower surfaces, the upper surface supporting the flywheel and the lower surface including a first plurality of magnets disposed thereon, and a base plate having a second plurality of magnets disposed on a surface thereof that is facing the first plurality of magnets, the second plurality of magnets having a polarity that is opposite of a polarity of the first plurality of magnets such that the magnetic force of the first and second plurality of magnets urges the magnetic levitation disk away from the base plate.

A flywheel assembly for a renewable energy generation system includes a flywheel housing defining a cavity therein, a flywheel rotatably disposed within the cavity of the flywheel housing, where the flywheel is simultaneously formed from the same component as the flywheel housing, a magnetic levitation disk defining opposed upper and lower surfaces, the upper surface supporting the flywheel and the lower surface including a first plurality of magnets disposed thereon, and a base plate having a second plurality of magnets disposed on a surface thereof that is facing the first plurality of magnets, the second plurality of magnets having a polarity that is opposite of a polarity of the first plurality of magnets such that the magnetic force of the first and second plurality of magnets urges the magnetic levitation disk away from the base plate.

An after-fan system for an engine may comprise an after-fan turbine an electrical generator operationally coupled to the after-fan turbine, and an electric motor electrically coupled to the electrical generator. The electrical generator may be configured to generate an electrical current in response to rotation of the after-fan turbine. The electric motor may be configured to generate torque.

An after-fan system for an engine may comprise an after-fan turbine an electrical generator operationally coupled to the after-fan turbine, and an electric motor electrically coupled to the electrical generator. The electrical generator may be configured to generate an electrical current in response to rotation of the after-fan turbine. The electric motor may be configured to generate torque.

The invention relates to a switching device (10) of a starting device for an engine, comprising: —two terminals (11, 12) of a supply electrical circuit of a motor; a solenoid device (13) having an axis (14) and comprising: —a solenoid coil (16) wound around said axis (14); —a plunger (17) which is partially housed in the solenoid coil (16) and which includes a core (18) and a contact plate (21); wherein, when electric current passes through the solenoid coil (16), the plunger (17) is caused to move axially from an inactive position to an active position, thereby moving a pinion gear of the motor into engagement with a ring gear of the engine, in which active position the contact plate (21) is in contact with the terminals (11,12) for closing the motor supply circuit; —a relay (30) having an axis and comprising: —a relay coil (36); —a movable member (31) which, when electric current passes through the relay coil (36), is caused to move from an open position in which electric current cannot pass through the solenoid coil (16), to a closed position in which electric current is made to pass through the solenoid coil (16); the solenoid device (13) and the relay (30) having one and the same axis (14).

The invention relates to a switching device (10) of a starting device for an engine, comprising: —two terminals (11, 12) of a supply electrical circuit of a motor; a solenoid device (13) having an axis (14) and comprising: —a solenoid coil (16) wound around said axis (14); —a plunger (17) which is partially housed in the solenoid coil (16) and which includes a core (18) and a contact plate (21); wherein, when electric current passes through the solenoid coil (16), the plunger (17) is caused to move axially from an inactive position to an active position, thereby moving a pinion gear of the motor into engagement with a ring gear of the engine, in which active position the contact plate (21) is in contact with the terminals (11,12) for closing the motor supply circuit; —a relay (30) having an axis and comprising: —a relay coil (36); —a movable member (31) which, when electric current passes through the relay coil (36), is caused to move from an open position in which electric current cannot pass through the solenoid coil (16), to a closed position in which electric current is made to pass through the solenoid coil (16); the solenoid device (13) and the relay (30) having one and the same axis (14).