A rotating electric machine includes a multi-phase coil, an armature core, a rotor, a yoke core and a superimposer. The armature core has the multi-phase coil wound thereon. The rotor is rotatably disposed and has a plurality of magnetic poles facing the armature core. The yoke core is arranged so as to surround outer peripheries of the multi-phase coil and the armature core. The yoke core is magnetically connected with the magnetic poles of the rotor. The superimposer superimposes a DC component on a multi-phase alternating current supplied to the multi-phase coil, thereby supplying a DC field magnetic flux to a magnetic circuit that is formed by the armature core, the magnetic poles of the rotor and the yoke core.

A rotating electric machine includes a multi-phase coil, an armature core, a rotor, a yoke core and a superimposer. The armature core has the multi-phase coil wound thereon. The rotor is rotatably disposed and has a plurality of magnetic poles facing the armature core. The yoke core is arranged so as to surround outer peripheries of the multi-phase coil and the armature core. The yoke core is magnetically connected with the magnetic poles of the rotor. The superimposer superimposes a DC component on a multi-phase alternating current supplied to the multi-phase coil, thereby supplying a DC field magnetic flux to a magnetic circuit that is formed by the armature core, the magnetic poles of the rotor and the yoke core.

An electrical machine comprising: at least one stator, at least one module, the at least one module comprising at least one electromagnetic coil and at least one switch, the at least one module being attached to the at least one stator; at least one rotor with a plurality of magnets attached to the at least one rotor, an integrated electrical differential coupled to at least one of the rotors, the at least one integrated electrical differential permitting the at least one rotor to output at least two rotational outputs to corresponding shafts, wherein the at least two rotational outputs are able to move the shafts at different rotational velocities to one another. The electrical machine is configured to fit into a housing, and that can be retrofitted into a conventional vehicle by replacing the mechanical differential.

An electrical machine comprising: at least one stator, at least one module, the at least one module comprising at least one electromagnetic coil and at least one switch, the at least one module being attached to the at least one stator; at least one rotor with a plurality of magnets attached to the at least one rotor, an integrated electrical differential coupled to at least one of the rotors, the at least one integrated electrical differential permitting the at least one rotor to output at least two rotational outputs to corresponding shafts, wherein the at least two rotational outputs are able to move the shafts at different rotational velocities to one another. The electrical machine is configured to fit into a housing, and that can be retrofitted into a conventional vehicle by replacing the mechanical differential.

The present invention provides a variable speed accelerator including: a constant-speed motor (51) having a constant-speed rotor (52) which is configured to rotate a constant-speed input shaft (Ac) of a transmission device (10) in a first direction; and a variable-speed motor (71) which has a variable-speed rotor (72) connected to a variable-speed input shaft (Av) of the transmission device (10), having a cylindrical shape centered on an axis with a shaft insertion hole (74) passing therethrough in the axial direction through which the constant-speed input shaft (Ac) inserted, and configured to rotate an output shaft (Ao) at a maximum rotation rate by rotating the variable-speed rotor (72) at a maximum rotation rate in a second direction opposite to the first direction, wherein the variable speed accelerator further includes an AC power source line (110) which connects the variable-speed motor (71) with an AC power source to allow the variable-speed motor (71) to rotate in the second direction; a rotation rate controller (100) which is provided on the AC power source line (110) to control a rotation rate of the variable-speed motor (71); a first switch (SW1) provided on the AC power source line (110); and a braking circuit (2) connected to portions locating between the variable-speed motor (71) and the rotation rate controller (100) with the first switch (SW1) on the AC power source line (110).

The present invention provides an electronic braking system for an irrigation machine. According to an exemplary preferred embodiment, the present invention includes a drive controller which includes a power supplying circuit which signals an ON condition when a motive power request is input into the drive controller and an OFF condition when motive power is not input into the system. According to a further preferred embodiment, the present invention further includes a 3-phase induction motor connected to apply torque to a drive shaft which is connected to a least one drive wheel. According to a further preferred embodiment, the power supplying circuit supplies 480V AC of motive power to the drive motor when the drive controller signals the ON condition and 10-80V DC of non-motive power to at least one phase of the motor when the drive controller signals the OFF condition. According to a further preferred embodiment, the application of the DC current is applied immediately after the motive power is removed from the drive motor and the application of non-motive power brakes and prevents the drive shaft from turning until the DC current is removed.

The present invention provides an electronic braking system for an irrigation machine. According to an exemplary preferred embodiment, the present invention includes a drive controller which includes a power supplying circuit which signals an ON condition when a motive power request is input into the drive controller and an OFF condition when motive power is not input into the system. According to a further preferred embodiment, the present invention further includes a 3-phase induction motor connected to apply torque to a drive shaft which is connected to a least one drive wheel. According to a further preferred embodiment, the power supplying circuit supplies 480V AC of motive power to the drive motor when the drive controller signals the ON condition and 10-80V DC of non-motive power to at least one phase of the motor when the drive controller signals the OFF condition. According to a further preferred embodiment, the application of the DC current is applied immediately after the motive power is removed from the drive motor and the application of non-motive power brakes and prevents the drive shaft from turning until the DC current is removed.

A device for expanding steam, whereby this device comprises an expander with an inlet that is connected to an inlet pipe and an outlet that is connected to an outlet pipe, whereby the inlet pipe is provided with an inlet valve and the outlet pipe is provided with an outlet valve for isolating the space between the valves, by closing these valves when the expander is not operating, whereby the device is provided with a steam supply that conditions the space between the valves when the expander is not operating, such that no air can penetrate into the space.

A device for expanding steam, whereby this device comprises an expander with an inlet that is connected to an inlet pipe and an outlet that is connected to an outlet pipe, whereby the inlet pipe is provided with an inlet valve and the outlet pipe is provided with an outlet valve for isolating the space between the valves, by closing these valves when the expander is not operating, whereby the device is provided with a steam supply that conditions the space between the valves when the expander is not operating, such that no air can penetrate into the space.

A technique facilitates a fracturing operation in a borehole and surrounding formation. The technique utilizes braking to arrest the rotation of an electric frac system and to thus limit the magnitude of a pressure peak in the event of an over-pressure shut down or other type of emergency shutdown. According to an embodiment, an electric motor is coupled with a fracturing pump which may be operated to pump a fracturing fluid into a well. Stopping or otherwise braking of the electric frac system is facilitated by applying rotor drag to a rotor of the electric motor.