Abstract: A rotor includes a rotor core formed of a stacked body in which two or more first electromagnetic steel sheets and a second electromagnetic steel sheet are stacked in a direction of an axis, the rotor core having a magnet insertion hole passing through the stacked body in the direction of the axis, and a first permanent magnet and a second permanent magnet disposed in the magnet insertion hole. The magnet insertion hole has a first region in which the first permanent magnet is inserted, and a second region in which the second permanent magnet is inserted. Each of the two or more first electromagnetic steel sheets has a bridge dividing the magnet insertion hole into the first region and the second region. The second electromagnetic steel sheet has the magnet insertion hole in which the first region and the second region are formed continuously with each other.

Abstract: A solid-state circuit breaker (SSCB) with self-diagnostic, self-maintenance, and self-protection capabilities includes: a power semiconductor device; an air gap disconnect unit connected in series with the power semiconductor device; a sense and drive circuit that switches the power semiconductor device OFF upon detecting a short circuit or overload of unacceptably long duration; and a microcontroller unit (MCU) that triggers the air gap disconnect unit to form an air gap and galvanically isolate an attached load, after the sense and drive circuit switches the power semiconductor device OFF. The MCU is further configured to monitor the operability of the air gap disconnect unit, the power semiconductor device, and other critical components of the SSCB and, when applicable, take corrective actions to prevent the SSCB and the connected load from being damaged or destroyed and/or to protect persons and the environment from being exposed to hazardous electrical conditions.

Abstract: A voltage regulation loop includes a voltage reference generation block that includes a bandgap voltage reference circuit; a linear voltage regulator block that includes a first and second linear voltage regulators, wherein the first linear voltage regulator provides a first regulated power supply to the bandgap voltage reference circuit in the voltage reference generation block, and the second linear voltage regulator provides a second regulated power supply to a load; and a soft startup circuit connected between the voltage reference generation block and the linear voltage regulator block, wherein a selector functions with a control block to output a selected voltage reference to pass to the soft startup circuit, wherein the soft startup circuit smooths the selected voltage reference and produces a smoothed voltage reference to pass to the linear voltage regulator block to prevent overshoots at startup.

Abstract: A rotary actuator with a moving frame includes an electrical coil that moves on an angular travel about an axis of rotation A, the shape of the coil being an elliptical cylinder and the axis of winding B being orthogonal to the axis of rotation A, the coil being placed in the magnetic field of a fixed magnet. The fixed magnet surrounds the coil and includes two semicylindrical portions, the generatrices of which are orthogonal to the axis of rotation A, the first of the semicylindrical portions having a north pole directed toward the coil, orthogonally to the direction of the generatrices and being positioned outside the coil, the second having a south pole directed toward the coil, orthogonally to the direction of the generatrices and also being positioned outside the coil opposite the first portion.

Abstract: In a circuit breaker arrangement, this disclosure describes a method and circuit design enables a current transformer to be used to detect ground faults in circuit breakers (such as a main-tie-main circuit breakers) that have been designed to receive signals from Rogowski coils.

Abstract: A motor includes a commutator, a bracket including a conductive brush, first and second wall parts, and first and second deformable parts. The conductive brush is in contact with the commutator. The first wall part includes a first surface extending along a first surface of the conductive brush. The second wall part includes a second surface extending along a second surface of the conductive brush located on a side opposite the first surface of the conductive brush. The first deformable part is in contact with both the first surface of the conductive brush and the first surface of the first wall part, and is deformable in response to movement of the conductive brush. The second deformable part is in contact with both the second surface of the conductive brush and the second surface of the second wall part, and is deformable in response to movement of the conductive brush.

Abstract: Phase coils include a first phase coil and a second phase coil, the phase coils are configured by connecting together end portions of the coil terminals of the first phase coil and the second phase coil that extend outward from identical radial positions in the slots axially outside the stator core so as to be radially outside a coil end group, and the coil terminals of the first phase coils of the phase coils of three phases include joint coil portions that extend outward from the slots within a pitch of one magnetic pole, are then bent so as to extend in an identical circumferential direction, and are placed in close proximity to the end portions of the coil terminals of the second phase coils that are intended for connection therewith.

Abstract: An electric machine rotor includes a core, a first end plate, a second end plate, and a shaft. The core defines an internal cavity. The first and second end plates each define a central orifice and are respectively secured to opposing axial ends of the core. The shaft is disposed within the cavity and engages the first and second end plates within the central orifices to facilitate synchronized rotation of and torque transfer between the core and shaft.

Abstract: The invention relates to a voltage limiting device which has an electromagnetically operable switching device for producing an electrical connection between a first cable terminal and a second cable terminal wherein a first electrical conductor connects the first cable terminal to the one terminal of the switching device and a second electrical conductor electrically connects the second cable terminal to the other terminal of the switching device. The voltage limiting device is characterized in that one of the two electrical conductors comprises an electrically conductive support plate. The expansion of the support plate in the width direction allows, in contrast to an electrical conductor which is characterized by a small width in relation to the length, a current displacement in the width direction.

Abstract: A method of controlling the behavior of a latching relay includes receiving a configuration signal of either a first behavior signal or a second behavior signal, receiving a power status signal of either a powered or unpowered signal, receiving either a low-to-high or a high-to-low signal command signal, generating latching pulse in response to receiving a powered signal input as the power status signal and a low-to-high signal as the command signal, generating an unlatching pulse in response to receiving a powered signal input as the power status signal and a high-to-low signal as the command signal input, and generating an unlatching pulse in response to receiving the second behavior signal as the configuration signal and the unpowered signal as the power status signal.

Abstract: A polarity reversal protection circuit includes a MOSFET and a turn-off circuit, which turns off the MOSFET in the case of a polarity reversal. The turn-off circuit includes a detector for detecting the case in which the voltage at the source terminal of the MOSFET undershoots the voltage at the drain terminal of said MOSFET. Furthermore, it includes a quick-break switch for turning off the MOSFET in the event of detected voltage undershooting, a comparator for comparing the voltages present at source terminal and drain terminal of the MOSFET after detected voltage undershooting, wherein the output of the comparator is connected to the gate terminal of the MOSFET, a boost converter, a buck converter and a charge pump for voltage supply, and a switch for switching off the comparator.

Abstract: A rotating machine lubrication structure is applied to a rotating machine including a cylindrical stator, a rotor and a shaft. A resolver is disposed concentrically with the rotating machine center line between the bearing and the rotor in a direction of the rotating machine center line in the casing, the resolver includes an annular resolver stator fixed to an inner side surface of the casing in an outer circumferential portion of the resolver stator, and a resolver rotor disposed on an inner circumferential side of the resolver stator and fixed to and integrally rotated with the shaft, and the resolver stator is provided with an oil through-hole allowing the lubricating oil to flow through at a portion on an inner circumferential side relative to a part fixed to the casing.

Abstract: A motor includes an armature including a commutator, a bracket including a conductive brush and a first wall part, and a first deformable part. The conductive brush is in contact with the commutator. The first wall part includes a first surface extending along a first surface of the conductive brush. The first deformable part is in contact with both the first surface of the conductive brush and the first surface of the first wall part. The first deformable part is deformable in response to movement of the conductive brush.

Abstract: The present disclosure relates to an over-voltage prevention apparatus and method of a distribution line connected with a distributed generator, which sets a range of a dispatched voltage based on a current voltage of a Pole Mounted Automatic Voltage Regulator (PVR) and a voltage at a connection point of a distributed generator to control so that the dispatched voltage is output within the corresponding range.

Abstract: An apparatus providing mechanical-to-electrical energy conversion generates electrical current by moving a conductive fluid in the presence of magnetic field. The motion of the fluid is induced by a mechanical energy source and the generated electrical current is directed to a useful load. The proposed apparatus utilizes a conductive fluid as a “liquid rotor” has substantially different radial velocity distribution than the conventional, prior art solid rotor. The apparatus includes an inverter, controlled by the flow of the conductive fluid, to generate a train of pulses as an output, where the pulses are used by an associated transformer to provide an AC output voltage.

Abstract: The invention mainly relates to a rotating electrical machine (10) comprising: a rotor (12) provided with a rotor winding (13); a stator (11) provided with a winding (14) having a plurality of phases; a converter (16) comprising rectifying components (17) to which the phases of the stator (11) are connected; a voltage regulator (24) for adapting an excitation current (lexc) applied to the rotor winding (13) according to a difference between an output voltage (Liait) and a reference voltage; at least one current sensor (27) arranged at the output of the rotating electrical machine (10) or on at least one phase of the rotating electrical machine (10); and a diagnostic module (30) that can detect a malfunction of the rotating electrical machine (10) on the basis of a current measurement provided by the current sensor (27).

Abstract: A switching apparatus comprises a plurality of current-conductive branches connected in parallel between first and second terminals, each current-conductive branch including at least one respective electrical connection member in series connection with at least one respective gas tube switch between the first and second terminals, wherein the inductance value of each electrical connection member is configured to balance the inductance values of the current-conductive branches.

Abstract: The present disclosure relates to a method for monitoring an electromechanical component of an automation system. The method includes sensing a current mechanical state variable of the electromechanical component, sensing a current electrical state variable of the electromechanical component and determining a state of the electromechanical component based at least in part on a behaviour model of the electromechanical component, wherein the behaviour model takes into account an effect of the sensed current mechanical state variable on the sensed current electrical state variable.

Abstract: A circuit interrupting device with a temperature activated permanent lockout trip mechanism is provided. The temperature activated permanent lockout trip mechanism is located in close proximity to a section of conductor that generates heat. An energized first solenoid generates a magnetic force capable of moving an armature that unlatches a latch releasing a spring to open a main contactor removing power from an electrical circuit. The temperature activated permanent lockout trip mechanism upon reaching a predetermined temperature which is higher than the predetermined temperature threshold of the temperature sensing switch also generates a mechanical force capable of moving the armature that unlatches the latch releasing the spring to open the main contactor removing power from the electrical circuit.

Abstract: Apparatus and method for controlling a pyro-fuse. A pyro-fuse control system includes a current sensing circuit and a diagnostic circuit. The current sensing circuit is configured to determine whether the current flowing in conductor exceeds a threshold current. The diagnostic circuit is coupled to the current sensing circuit. The diagnostic circuit is configured to determine whether an indication of current exceeding the threshold current generated by the current sensing circuit is caused by current flowing the conductor and is not caused by a fault in the current sensing circuit.