Abstract: Stator modules are disclosed. Stator modules may include: a stator body; a working surface supported relative to the stator body; and a plurality of electrical conductors, each electrical conductor of the plurality of electrical conductors extending along a respective portion of the working surface and operable to generate a magnetic field to facilitate moving, relative to the working surface, a magnetized mover in the magnetic field in response to electrical current through the electrical conductor. Robotic systems including such stator modules are also disclosed.

Abstract: A concrete vibrator system includes a concrete vibrator having a motor, a vibratory head that is actuated by the motor, and a controller that controls the motor. The concrete vibrator system may also include one or more remote devices or servers that wirelessly communicate with the controller of the concrete vibrator. The remote device may monitor the speed output by the motor and the voltage supplied to the motor to achieve a set speed via the controller, and display information representative of the motor speed and motor voltage to the user. Moreover, the speed output by the motor may be controlled using voltage supplied to the motor.

Abstract: Example generator brush adapters include a plate configured to mount to a static support structure and to couple to a brush assembly, such that the brush assembly is mounted to the static support structure along a single degree of freedom.

Abstract: The present disclosure is generally directed to techniques for radial alignment of motor components relative to each other to achieve a motor with a rotor bore having sub-micron end-to-end deviation. In an embodiment, a rotor bore alignment tool is disclosed herein that can be inserted between motor components, and more particularly, apertures/through holes defined by each of the motor components such as housing sections and a stator assembly. The rotor bore alignment tool includes expandable members that can be selectively transitioned to an extended position to cause each of the motor components to be radially aligned prior to securely coupling the same in a so-called “stack” to form a motor. Once the motor components are coupled together, the resulting motor includes a rotor shaft extending from end-to-end that preferably includes a sub-micron deviation of less than 10 microns, and more preferably less than or equal to 5 microns, for example.

Abstract: An example electric motor includes a housing, a stator fixed relative to the housing, a rotor, a brake assembly, a first bearing, and a second bearing. The rotor has a hub portion, a cylindrical portion, and a disk portion. The hub portion of the rotor has a first end, a second end, and a through hole therethrough. The brake assembly is fixed relative to the housing and configured to selectively couple the disk portion of the rotor to the housing. The first bearing is mounted between the first end of the hub portion of the rotor and the disk portion of the rotor. The second bearing is mounted between the second end of the hub portion of the rotor and the disk portion of the rotor.

Abstract: A two-speed electric drive assembly for vehicles includes a main driveshaft driven by a first axial flux motor where the main driveshaft extends coaxially through a hollow assist driveshaft driven by a second axial flux motor. The main driveshaft includes a main gear that is continuously meshed with an intermediate gear on an intermediate driveshaft. A freewheel gear is mounted around the hollow assist driveshaft and can be selectively coupled and decoupled with the hollow assist driveshaft by a shift mechanism. The freewheel gear is continuously meshed with an intermediate gear on the intermediate driveshaft. Another intermediate gear affixed to the intermediate driveshaft is continuously meshed with an output gear affixed to an output driveshaft. The two-speed electric drive assembly can selectively switch between speed mode and torque mode without torque interrupt.

Abstract: A rotary mechanism connects a first rotary part and a second rotary part, without using a coupling and while allowing an installation error between the first rotary part and the second rotary part. A rotation body includes a first rotary part and a first fixed part. A flat plate is fixed to the first fixed part of the rotation body and has rigidity in a rotating direction of the first rotary part and flexibility in an axial direction for the rotating direction. A motor includes a second rotary part coaxially fixed to the first rotary part of the rotation body and a second fixed part fixed to the flat plate.

Abstract: An electric brushless DC motor is provided including a rotor assembly having a substantially-cylindrical metallic rotor body and at least one rotor magnet mounted on a surface of the rotor body, a stator assembly rotatably disposed relative to the rotor assembly, and a molded structure formed in contact with the rotor body. The molded structure includes a main body having a first axial end that engages at least one axial end of the at least one rotor magnet to axially retain the at least one rotor magnet on the surface of the rotor body and a second axial end that integrally forms a fan adjacent the rotor body.

Abstract: Energy generating system that generates energy from an external source includes a frame having two vertically spaced apart supports and at least one rod extending therebetween. An electromagnetic power generating arrangement is between the supports and includes a movable power generating coil, a first stationary power generating coil that interacts with the movable coil at an upper position in an upward path of movement of the movable coil, and a second stationary power generating coil that interacts with the movable coil at a lower position in a downward path of movement of the movable coil to generate electricity which is conveyed through a cable to an electricity processing system. The movable coil is connected to each rod, and the movable coil is lifted from the lower position to the upper position along each rod, ideally through energy from an external source.

Abstract: A motor coil cooling structure, includes: a rotor core fixed to a rotation shaft having an internal supply path for coolant, and that includes a rotor-side flow path in communication with the supply path and passing through to a radial direction outer side of the rotor core; a stator core disposed at the rotor core so as to form a space between the stator core and the rotor core, and that includes slots each housing a coil; first flow paths formed so as to include the slots and pass through the stator core in a radial direction; second flow paths formed in an upper portion of the stator core relative to the rotation shaft, including the slots, extending in a radial direction and passing through the stator core only at a radial direction outer circumferential side thereof; and a supply section that supplies coolant from above the stator core.

Abstract: A drive unit has a first electric rotary machine and a second electric rotary machine as well as a first shaft and a second shaft. The first electric rotary machine is arranged at least partly radially and axially within an area radially delimited by the second electric rotary machine, and the stator of the first electric rotary machine and the stator of the second electric rotary machine are mechanically fixed to each other. The drive unit comprises a coolant supply device which is arranged adjacently to the stators in the axial direction and by means of which coolant can be supplied axially between and/or into the stators.

Abstract: Provided is a compact and lightweight motor complex cooling system with compatibility in which by providing a structure that circulates internal air without introducing air from the outside, an air-cooled radiator used in the conventional air cooling scheme is unnecessary, and only a water-cooled radiator is required, contributing to miniaturization and weight reduction of a device, and the compact and lightweight motor complex cooling system can be installed in an existing motor, and thus has compatibility, and is configured by a combination of air cooling and water cooling using coolant, allowing direct cooling to the end coil windings and the front of shafts of a rotor and a stator and by air cooling, and has excellent cooling efficiency through water cooling.

Abstract: An example system includes a housing configured to house a portion of an electric machine and a heat transfer material, the heat transfer material is configured to contact a conductor of the portion of the electric machine and to remove heat from the conductor and transfer heat to the housing. The system includes a coolant configured to remove heat from the housing. An inner surface of the housing comprises a plurality of structures configured to increase an inner surface area of the housing, wherein the plurality of structures are configured to contact the heat transfer material.

Abstract: A slotless electric motor provides a phase change material that may communicate thermally through the sides of coils directly attached to the outer circumference of the central stator. A control system modeling the motor allows effective operation for short durations.

Abstract: In a rotating electrical machine, a holder member is disposed to be radially closer to an armature coil than to a magnetic field generator. The holder member is configured to hold the armature coil. The holder member has a first portion that faces a first end portion of the armature coil, and a second portion that faces a second end portion of the armature coil. The first portion of the holder member is thermally coupled to the first end portion of the armature coil. The second portion of the holder member is thermally coupled to the second end portion of the armature coil.

Abstract: The present disclosure relates to an electric motor having a stator and a rotor. The rotor is fitted with permanent magnets which are surrounded by a rotor packet. A heat dissipating element is attached to the rotor packet. A gap seal is formed between an outer diameter of the heat dissipating element and an inner diameter of a component connected to the stator. In some examples, the component may be a coil body connected to the stator.

Abstract: In a power converter apparatus including a PFC circuit operating in a current-critical mode, a zero point of an inductor current is accurately detected. The control circuit includes a current detector unit including a first detection circuit that detects an inductor current, amplifies a voltage corresponding to the detected current with a gain, and outputs it as a detection voltage and a comparison circuit that compares the detected voltage with a predetermined reference voltage and outputs a comparison result signal. The control circuit calculates the reference voltage for making a delay when detecting the zero value of the inductor current substantially zero, based on the detected input voltage, the detected output voltage, the preset delay time, the inductance value of the inductor, the conversion factor in current/voltage converting, the power supply voltage, and the gain, and then, outputs it to the comparison circuit.

Abstract: This application provides a load line circuit and an electronic device, where the load line circuit is applied to the electronic device. A voltage value of a feedback voltage provided by the load line circuit to a switch-mode power supply is linearly and positively correlated with each of a voltage value of a first voltage and a current value of a first current, where the first voltage is a voltage provided to a load circuit, and the first current is a current provided to the load circuit. Through disposition of the load line circuit, the switch-mode power supply can implement a load line function.

Abstract: An integrated inductor and a power conversion module including the integrated inductor are provided. The integrated inductor includes a magnetic core, the magnetic core including two cover plates, two side columns and two central columns between the two side columns, and two windings wound around the two central columns respectively, forming two inductors. Each operating current flowing through the two windings includes a corresponding high-frequency current component, a phase difference between the high-frequency current components of the operating currents flowing through the two windings is 180 degrees.

Abstract: In one embodiment, a system includes several voltage regulators configured to output several voltage levels. Each voltage regulator may correspond to a respective voltage level. The system includes a power switch bank that includes several power switches and several multiplexors. A set of power switches are coupled to each of the voltage regulators. Each power switch is coupled to at least one of the multiplexors. Each multiplexor is coupled to a respective voltage regulator. The system includes one or more loads coupled to a respective one or more power switch.

Abstract: A switching control circuit configured to control a switching device. The switching control circuit includes a detection circuit configured to detect whether a current flowing through the switching device is in an overcurrent state, a first signal output circuit configured to output a first signal indicating whether a time period of the overcurrent state is longer than a first time period, and a driving circuit. The driving circuit turns on the switching device based on a first input signal. The driving circuit turns off the switching device through a first switch based on a second input signal when the time period of the overcurrent state is shorter than the first time period, and through a second switch, having a greater on-resistance than the first switch, based on the second input signal and the first signal when the time period of the overcurrent state is longer than the first time period.

Abstract: In a control circuit for a power converter applicable to a system including a rotary electric machine, a fail-safe controller performs, in response to determination that there is a failure in the system, a short-circuit control routine that turns on predetermined turn-on arm switches, and turns off predetermined turn-off arm switches. The turn-on arm switches bare one of (i) upper-arm switches and (ii) lower-arm switches, and the turn-off arm switches are the other of (i) the upper-arm switches and (ii) the lower-arm switches. An on determiner detects a drive state of each turn-on arm switch upon determination that the turn-on is instructed for the corresponding turn-on arm switch, and determines, based on the drive state of each turn-on arm switch, whether the turn-on arm switches are switchable to be on in preparation for a short-circuit control routine performed by a short-circuit controller.

Abstract: A power supply device for suppressing the surge includes a bridge rectifier, a first surge absorption circuit, a second surge absorption circuit, a third surge absorption circuit, and a boost converter. The bridge rectifier generates a rectified voltage according to a first input voltage and a second input voltage. The first surge absorption circuit receives the rectified voltage. The first surge absorption circuit is coupled to a ground. The second surge absorption circuit is coupled to the first surge absorption circuit. The third surge absorption circuit is coupled to the second surge absorption circuit. The third surge absorption circuit includes a transformer. The boost converter is coupled to the third surge absorption circuit, and generates an output voltage. The first surge absorption circuit provides a high impedance value. The second surge absorption circuit provides a median impedance value. The third surge absorption circuit provides a low impedance value.

Abstract: A power conversion device includes a voltage-type power converter and a current-type power converter each of which performs power conversion between AC and DC, and a controlling circuitry, and power is transmitted/received between AC sides via a DC circuit. In first starting control for starting the voltage-type power converter and the current-type power converter, the controlling circuitry controls a semiconductor element of at least one of the voltage-type power converter and the current-type power converter, to adjust DC voltage at DC terminals of the voltage-type converter to a set first voltage value, thereby controlling current flowing through the DC circuit to be first current not greater than a rated current value of the semiconductor elements.

Abstract: A highly integrated power module and an air conditioner are provided. The module has a substrate. The module has a power factor correction element, a rectifier bridge, a compressor inverter and a blower inverter, which are arranged on the substrate. The rectifier bridge is arranged on a first side of the power factor correction element. The compressor inverter is arranged on a second side of the power factor correction element. The blower inverter is arranged on a third side of the compressor inverter. The rectifier bridge is electrically connected to the power factor correction element. The power factor correction element is electrically connected to the compressor inverter and the blower inverter.

Abstract: A display device includes a diode bridge configured to rectify input power; a power factor correction (PFC) circuit configured to control a power factor of the input power rectified by the diode bridge; a direct current (DC)/DC converter configured to change voltage of the input power received through the PFC circuit; and a PFC controller connected to the diode bridge and configured to selectively turn on or off the PFC circuit based on terminal voltages of lower diodes included in the diode bridge.

Abstract: Uncompensated upper and lower reference-currents are generated for first and second branches of a high-frequency half-bridge within an interleaved-totem-pole PFC.

Abstract: A controller of a switching power supply can include: a frequency-jittering control circuit configured to generate a first frequency-jittering signal and a second frequency-jittering signal; where a jittering range of an operating frequency of a power transistor in the switching power supply is adjusted by the first frequency-jittering signal; and where a jittering amplitude of a peak value of an inductor current of the switching power supply is adjusted by the second frequency-jittering signal.

Abstract: Embodiments disclosed herein include inductor arrays. In an embodiment, an inductor array comprises a first inductor with a first inductance. In an embodiment, the first inductor is switched at a first frequency. In an embodiment, the inductor array further comprises a second inductor with a second inductance that is different than the first inductance. In an embodiment, the second inductor is switched at a second frequency that is different than the first frequency.

Abstract: An objective of the disclosure is to provide a power supply cell of a power supply system and a power supply system using the same.

Abstract: A control circuit used in a switching converter having a switch and an inductor. The control circuit has an error amplifying circuit, a current comparing circuit, a clock generator and a constant OFF time generator. The error amplifying circuit receives a voltage reference signal and a voltage feedback signal indicative of an output voltage signal, and provides an error signal. The current comparing circuit compares the error signal with a current sensing signal indicative of a current flowing through the inductor, and provides a comparing signal to turn the switch OFF. When the switching converter is coupled to a filtering capacitor, the clock generator provides a clock signal to turn the switch ON, and when the switching converter is coupled to a super capacitor, the clock generator is disabled and the constant OFF time generator provides a constant OFF time signal to turn the switch ON.

Abstract: A method for operating a system including a voltage regulating power supply includes sensing a local voltage on a first node of the system and a remote voltage on a second node of the system. The first node and the second node are in a conductive path coupled to a load of the system. The first node is closer to a power stage of the voltage regulating power supply than the second node. The second node is closer to the load than the first node. The method includes detecting a load release event based on the local voltage, the remote voltage, and at least one predetermined threshold value.

Abstract: In a switching power supply device, a comparison voltage is generated based on a feedback voltage commensurate with the output voltage. Synchronously with the output transistor being turned on, a ramp voltage is made to start increasing from a first initial voltage; when the ramp voltage exceeds the comparison voltage, the output transistor is turned off. When the switching frequency is lowered from a first frequency to a second frequency, it is switched to the second frequency after the lapse of a transition period. During the transition period, the ramp voltage is made to start increasing from a second initial voltage (>first initial voltage).

Abstract: A power converter device is provided. A feedback circuit outputs a comparison output signal. A phase-locked loop circuit provides a phase-locked signal according to a reference clock signal and an inductor voltage in a power converter circuit. An on-time circuit provides an on-time comparing signal according to the phase-locked signal, an input voltage, the inductor voltage and an output voltage of the power converter circuit. A first input terminal of an SR flip-flop receives the on-time comparing signal from the on-time circuit. A second input terminal of the SR flip-flop receives the comparison output signal from the feedback circuit. A frequency control circuit, according to changes in the input voltage and the output voltage of the power converter circuit, instantaneously adjusts the on-time of the on-time signal such that an output terminal of the SR flip-flop outputs the adjusted on-time signal to the power converter circuit.

Abstract: Control circuitry for controlling a current through an inductor of a power converter, the control circuitry comprising: comparison circuitry configured to compare a measurement signal, indicative of a current through the inductor during a charging phase of the power converter, to a signal indicative of a target average current through the inductor for the charging phase and to output a comparison signal based on said comparison; detection circuitry configured to detect, based on the comparison signal, a crossing time indicative of a time at which the current through the inductor during the charging phase is equal to the target average current for the charging phase; and current control circuitry configured to control a current through the inductor during a subsequent charging phase based on the crossing time.

Abstract: In an embodiment, an apparatus is disclosed that comprises a voltage regulator and a regulator booster. The voltage regulator is supplied by an input and is configured to generate a regulated output. The regulated output has a voltage corresponding to an operating point of the voltage regulator. The regulator booster is connected to the voltage regulator and, when activated, is configured to boost the voltage of the regulated output by a target amount. The target amount is at least a portion of a magnitude of a voltage droop relative to the operating point that is caused by a change in a current load on the regulated output.

Abstract: A multi slope output impedance controller is configured to vary the effective impedance Zeff_n of a power converter to reduce a current imbalance between power supplies in a masterless configuration of N parallel-connected power supplies while maintaining load regulation during start-up and steady-state operation. Generally speaking, the controller commands a high value of Zeff_n when Iout_n is low to facilitate current sharing and reduce current imbalance Ib between the power supplies and commands a low value of Zeff_n when Iout_n is high to improve load regulation.

Abstract: A power converter controller includes an analog to digital converter (ADC) to generate a digital representation of a feedback signal of a power converter, the feedback signal being received from a compensator of the power converter and being based on an output voltage of the power converter. A nonlinear gain block of the power converter controller receives the digital representation of the feedback signal and generates a transformed digital representation of the feedback signal using a nonlinear function. A switch control block of the power converter controller controls an on-time of a primary-side switch of the power converter based on the transformed digital representation of the feedback signal.

Abstract: An integrated circuit for a power supply circuit that includes a transistor and generates an output voltage of a target level. The integrated circuit is configured to switch the transistor. The integrated circuit includes a first terminal configured to receive a feedback voltage according to the output voltage, a signal detection circuit configured to detect, through the first terminal, a setting signal received from an external circuit that operates based on the output voltage, and a driver circuit configured to drive the transistor in response to the setting signal detected by the signal detection circuit.

Abstract: An apparatus for high-speed switching between a plurality of power sources includes a switch-mode isolation transformer. The switch-mode isolation transformer includes a plurality of isolated primary windings. Each of the plurality of isolated primary windings can be electrically isolated from others of the isolated primary windings and selectively couplable to a power source of the plurality of power sources. The switch-mode isolation transformer further includes a secondary winding coupled to a load. The apparatus further includes a controller to selectively couple one of the plurality of power sources through a corresponding isolated primary winding, responsive to detecting an adverse condition in another power source of the plurality of power sources. Other methods and systems are also described.

Abstract: Operation of a switching power converter, such as to reduce voltage spikes on the secondary side of switching power converters. One example is a method of operating a switching power converter, the method comprising: sensing, by a controller of a switching power converter, a strength-selection signal; and driving, by the controller within a plurality of switching cycles, a control input of a primary electrically-controlled switch, the driving in each switching cycle at a drive strength based on the strength-selection signal.

Abstract: An electric conductive part for a power conversion circuit includes a connection conductive portion and a branch portion. The connection conductive portion is configured to connect a joint portion of a battery with a capacitor that is included in the power conversion circuit. The connection conductive portion includes a path portion, which is configured to connect the joint portion with the capacitor, and a branch portion that branches from the path portion. The branch portion extends toward a control circuit board and is connected with the control circuit board. The control circuit board is configured to control drive of a switch element of the power conversion circuit.

Abstract: In an example, a rectifier circuit includes first and second capacitors, first and second current control devices, and a switch. The first current control device is configured to provide an input current to the first capacitor during a positive cycle of an alternating current (AC) input voltage. The second capacitor is configured to store a charge and the switch is configured to couple the second capacitor to a ground terminal so the second capacitor discharges a capacitor current during the positive cycle of the input voltage responsive to the stored charge in the second capacitor. The second current control device is configured to provide the capacitor current to the first capacitor during the positive cycle of the input voltage. The first capacitor is configured to store a charge responsive to the input current and the capacitor current.

Abstract: A method includes outputting an alternating current (AC) waveform from an inverter module to a plurality of loads, outputting a fault waveform from the inverter module to a first load of the plurality of loads in response to a fault condition associated with the first load, and outputting the AC waveform from the inverter module to at least some of the plurality of loads if the fault condition is cleared before a recovery period expires or disconnecting the inverter module from the plurality of loads if the fault condition is not cleared before the recovery period expires.

Abstract: An iterative learning-based energy-saving control method for a piezoelectric motor, comprising: setting a sampling period of a piezoelectric motor (101); obtaining an expected output trajectory of the piezoelectric motor, and performing sampling according to the sampling period to obtain a sampled expected output sequence (102); setting an initial control input signal of the piezoelectric motor (103); obtaining an actual control input signal according to a mapping relation of the initial control input signal, and transmitting the actual control input signal to the piezoelectric motor to obtain an actual output position (104); obtaining a mapping relation of the output position of the piezoelectric motor according to the actual output position, and sampling the mapping relation according to the sampling period to obtain a sampled actual output sequence (105); calculating the difference between the sampled expected output sequence and the sampled actual output sequence to obtain a sampling error function sequen

Abstract: Piezoelectric vibrational energy harvesters (PVEHs) include a Macro Fiber Composite (MFC)) piezoelectric transducer coupled to a cantilever to harvest vibrational energy. One or more Ionic Polymer Metal Composite (IPMC) strips are situated to provide device tuning over a wide frequency range by applying variable contact force to the cantilever. Power consumption for tuning is sufficiently low that the tuning actuator (IPMCs) can be powered using harvested energy.

Abstract: In an electric motor control device which controls rotation of an AC electric motor having two sets of three-phase windings and provided with a resolver having two systems by calculating voltage command values on dq axes, dq conversion of currents of first three-phase windings is performed using a first angle calculated from output of the first system of the resolver, and dq conversion of currents of second three-phase windings is performed using a second angle calculated from output of the second system of the resolver. With both d-axis current command values set at the same value, respective voltage command values on dq axes are calculated and respectively converted into voltage command values for voltage application to the first three-phase windings, using the first angle, and converted into voltage command values for voltage application to the second three-phase windings, using the second angle.

Abstract: A motor drive system and method for determining an optimized efficiency of the motor drive system are provided. The motor drive system includes a system controller, a motor drive having includes an inverter configured to generate the AC power upon one or more motor leads, and an electric motor, which is to convert the AC power from the motor leads to rotational energy. A dynamometer may include a load coupled to the shaft and sensors to measure to measure operating characteristics such as torque and speed of the electric motor. The system controller is configured to generate a lookup table, with an entry describing an output current command for operating the inverter and the motor at a maximum system efficiency for a given combination rotational speed and output torque. Motor temperature may also be measured and used as an additional index into the lookup table.

Abstract: A method of controlling a Free Piston Mover, the method comprising the steps of: generating a Control Parameter Set for closed loop control of a Target Control Variable, this set comprising a Target Control Variable Function together with one or more of: a Stroke Threshold Function; a Feed Forward Current Function; a Feedback Terms Function; Control Parameter Set Transition Conditions; transmitting the Control Parameter Set to an In-Stroke Controller in advance of the start of a Stroke to be controlled; modifying one or more of the constituents of the Control Parameter Set for any Future Stroke of the Free Piston Mover using a Future-Stroke Controller; and transmitting the modified Control Parameter Set to the In-Stroke Controller for the control of any Future Stroke.

Abstract: An apparatus and a method for inverter control are disclosed. A method according to an embodiment of the present disclosure comprises: discretizing, in a continuous time domain, a voltage equation for a motor in a stationary coordinate system in which a zero-order hold and time delay is reflected; and determining a voltage equation for the motor in a synchronous coordinate system in a discrete time domain by reflecting the position and speed of a rotor of the motor.