Abstract: A bus bar unit is configured to supply power to coils (16) of a plurality of phases, and includes phase bus bars (47U ), (47V), and (47W) which are provided for each phase and are connected to winding start ends of the coils, and a neutral point bus bar (81) which is connected to winding finish ends of the coils, the neutral point bus bar (81) being formed by bending an elongated plate-shaped member such that a width direction of the elongated plate-shaped member and a radial direction of the bus bar unit coincide with each other, and including a plurality of bus bar pieces (82) and a connection portion (83) which connects the bus bar pieces (82) and (82) adjacent to each other, and a width of a deformation portion (85) of the connection portion (83) being narrower than a width of the bus bar piece (82).

Abstract: A hybrid motor structure is provided; the motor may include a stator, a rotor, a first coil, a first magnet set, a second coil and a second magnet set. The stator may include a plurality of stator teeth. The rotor may be installed on the stator. The first coil may be wound on the stator teeth. The first magnet set may include a plurality of first magnet blocks; the first magnet blocks may be disposed around the rotor and corresponding to the first coil. The second magnet set may include a plurality of second magnet blocks disposed around the rotor and corresponding to the second coil. The hybrid motor structure can be applied to various kinds of motors, such as radial motor and axial motor, etc.

Abstract: In a three-phase AC electric motor, in each slot, any or some of the windings of six phases in total, including three phases of U, V, and W phases and opposite phases thereof, are arranged in three layers per slot. As the windings in first layers, of the three-layer windings, U, V, and W-phase windings are arranged so as to have rotational symmetry with one another at a mechanical angle of ±120 degrees. The windings in second layers have the same arrangement as in the first layers shifted by L slots, and the windings in third layers have the same arrangement as in the first layers shifted by L slots in a direction opposite to the arrangement of the windings in the second layers.

Abstract: A rotor for a motor comprising a frame having a hub for connecting the rotor to a shaft and a perimeter portion for interacting with a stator of the motor to cause the rotor to rotate about an axis of rotation. The frame comprises legs extending from an outer portion of the frame towards the hub, each leg having an inner end at the hub and an outer end at the outer portion of the frame, the inner ends of a first plurality of legs being spaced from the inner ends of a second plurality of legs in a direction along the axis of rotation.

Abstract: Provided is an electric motor capable of stabilizing a preload applied to a bearing by an annular spring and effectively retarding degradation of the annular spring. The electric motor includes a motor shaft, a rotor, a stator, a housing containing the rotor and the stator in a posture where the motor shaft extends vertically, an upper bearing and a lower bearing supporting the motor shaft, and an annular spring applying a downward preload to the upper bearing. The lower bearing is fixed to the motor shaft and the housing. The housing has a load-receiving surface receiving an upward thrust load overcoming the preload from the upper bearing.

Abstract: A stator is fixed to a frame of an electric motor. A rotor is rotatably mounted to the frame to face the stator in a radial direction. A heat sink, to which a control substrate is attached, is mounted in an opening of the frame. A motor cover is attached to a front end of the frame to cover the heat sink. An adhesive groove, which has a fixed depth and is filled with an adhesive, is formed on the front end. A joining portion is formed on the rear end of the motor cover, and is inserted into the adhesive groove is an axis of rotation direction to join the motor cover with the frame in a liquid-tight manner.

Abstract: An integrated system includes a controller, a drive device, a fastening supporting member, and a fixing member. The controller has a controller connector. The drive device has a drive device connector that is connected to the controller connector so that the drive device is electrically coupled to the controller. Via the fastening supporting member, the controller and the drive device are maintained in an electrically coupled state in which the drive device connector is connected to the controller connector. Via the fixing member, the controller and the drive device are maintained in a mechanically coupled state in which the drive device is mechanically coupled to the controller.

Abstract: An electric power generation and brake device disposed on a shaft includes: a wheel installed to the shaft and including a magnet; a stator unit installed to the shaft and including a stator body, a serrated portion and a coil, such that when the wheel rotates, the magnet rotates with respect to the stator unit to generate an alternating current; a rectifier unit connected to the stator unit for converting the alternating current into a direct current; a control panel connected to the rectifier unit; a waveform generator unit connected to the control panel for generating an inverted torque input signal; and a brake unit for receiving the direct current and the inverted torque input signal, and including a brake body, a serrated portion and a coil, and the brake unit is provided for braking the wheel, so as to resist vibration and reduce noise.

Abstract: A PMDC motor has a housing, a stator magnet disposed in an interior of the housing, and a rotor core disposed within the stator magnet. A ratio of an outer diameter of the rotor core to the outer diameter of the housing is from 0.60 to 0.67. The noise of the motor during operation is reduced by increasing the thickness of the stator magnet, reducing the outer diameter of the rotor core, reducing the air gap between the magnet and the rotor core and reducing the rotational inertia of the rotor core. The motor is particularly suited for use in vehicle HVAC systems where low noise is an important requirement.

Abstract: An apparatus includes a first component and a second component. The second component is located at a first position. The second component includes a first connection to the first component. The first position and the first connection are configured to stiffen an electric motor assembly.

Abstract: A motor vibration device includes a motor having a rotating shaft and an eccentric fixed to the shaft. The eccentric includes multiple stacked eccentric plates fixed together by engaging mounting protrusions and mounting recesses formed on adjacent eccentric plates. Each eccentric plate includes a connection portion and an eccentric portion connected to the connection portion. The connection portion has a through hole into which the shaft is pressed. The eccentric portion includes a first straight edge and a second straight edge respectively extending from two sides of the connection portion, and a circular arc edge connecting the first and second straight edges. An included angle between the first and second straight edges ranges from 150 degrees to 180 degrees.

Abstract: A power tool is provided including a housing; a brushless DC motor housed inside an upper body of the housing; a control unit housed inside a handle of the housing, the control unit comprising a micro-controller mounted over a control circuit board; and a variable-speed switch assembly including a main body mounted directly on a surface of the control circuit board, a trigger, a plunger linearly movable with the trigger with respect to the main body, a speed-sensing mechanism housed inside the main body and coupled to the plunger to generate a variable-speed voltage signal based on the position of the plunger, and at least one output pin connecting the speed-sensing mechanism of the variable-speed switch assembly directly to at least one conductive track on the control circuit board to provide the variable-speed voltage signal to the micro-controller via the at least one conductive track.

Abstract: A rotating machinery equipment is disclosed, comprising a rotating electrical machine having a stator and a rotating shaft, whereon a rotor is mounted. The machinery equipment further comprises a cooling fan comprised of a rotating impeller mounted on the rotating shaft for co-rotation therewith. Cooling gas passages are provided for delivering compressed cooling gas through the stator and rotor. The cooling gas is delivered by the impeller into a cooling-gas distribution chamber. The pressure of the cooling gas in the cooling-gas distribution chamber generates an axial force balancing the axial thrust generated on the electrical machine by the cooling gas flow.

Abstract: A marine propulsion device, including an engine including a crankshaft, and a power generator including a rotor configured to be rotated by the crankshaft, and a stator arranged to face the rotor, the stator including a first coil group and a second coil group each configured to generate alternating current (AC), the second coil group being configured to generate more electric power than the first coil group. The marine propulsion device further includes a rectifier configured to rectify the AC generated by the first coil group to thereby obtain a first direct current (DC), and to output the first DC to a first battery, a converting device configured to convert the AC generated by the second coil group into a second DC, and a transformation device configured to transform a voltage of the second DC, and to output the voltage-transformed DC to a second battery.

Abstract: An electric generator includes a base unit, a driving unit and at least one power generating unit. The base unit includes a shaft. The driving unit includes a tubular member that surrounds the shaft and that is rotatable about the shaft, and a plurality of blade modules that are disposed co-rotatably on the tubular member. The power generating unit includes a stator that is connected fixedly to the shaft, and a rotor that is connected co-rotatably to the tubular member. The rotor is rotated relative to the stator to induce a current when the blade modules are driven by a fluid flow to rotate the tubular member relative to the shaft.

Abstract: Renewable electricity, such as from solar or wind, powers a topping cycle utilizing combustion energy electricity generation, such that the electricity output of the system exceeds the combined standalone outputs. Renewable carbon, such as from biomass, can also power a similar topping cycle, having the same effect.

Abstract: An energy production device including a frame, a body, first and second aligned input shafts projecting from two opposite faces of the body, and a third input shaft aligned with an output shaft. The direction of the first and second input shafts is perpendicular to the direction of the third input shaft and of the output shaft. A mechanical connection is provided at the proximal part of each of the shafts which is within the body. The mechanical connection operates with a transmission system within the body so that any rotation movement on any of the input shafts is converted into a unidirectional rotation movement on the output shaft. A distal end of the third input shaft is fixed to the frame. A bearing is fixed on the frame, into which the distal end of the output shaft is freewheeling.

Abstract: A rotating electrical machine has a housing, a stator having a stator core and a rotor having a rotor core and rotor side plates rotatably supported by the housing. The rotor core is arranged to have a gap between the end surfaces of the rotor core and the stator. Oil containers are arranged on at least one surface of the rotor side plate. Each oil container has a scoop-up part and an exhaust outlet formed on end sections thereof. When the rotor is rotating, the scoop-up part scoops up an oil stored in the housing, the oil and inside air are compressed in the oil container, and the exhaust outlet exhausts the oil and compressed air to the coil end of the stator. The housing stores the oil at a lowermost side thereof so that the scoop-up part and the exhaust outlet are immersed in the oil.

Abstract: A stator is fixed to a frame of an electric motor. A rotor is rotatably mounted to the frame to face the stator in a radial direction. A heat sink, to which a control substrate is attached, is mounted in one end of the frame. A heat transfer plate is interposed between heat-generating elements formed on the control substrate and the heat sink to absorb variations in a distance therebetween, the heat transfer plate allow heat to be transmitted from the heat-generating elements to the heat sink. The heat transfer plate includes a frame body mounted to the heat sink and a plurality of contact strips that flexibly protrude from the frame body and that abut the heat-generating elements.

Abstract: A frame of an electric motor opens in one end. A heat sink, to which a control substrate is connected, closes an opening of the frame. A stator is positioned on an inner circumferential surface of the frame to be movable in an axis of rotation direction. A fastening bolt penetrates through the heat sink and a motor cover to fasten to the frame, thereby holding the stator between a pressing portion formed on the heat sink and a stepped portion formed on the inner circumferential surface to fix the stator to the frame. A disc spring is interposed between a front bearing that retains a rotor shaft and a spring retainer formed in the heat sink, and the rotor shaft is biased in the axis of rotation direction by a biasing force from the disc spring.

Abstract: A frame of an electric motor opens in one end. A heat sink, to which a control substrate is connected, closes an opening of the frame. The frame includes a cylinder portion to which a stator is fixed, and a bottom portion that extends inward in the radial direction from the cylinder portion. A rotor is rotatably mounted in the frame to face the stator in the radial direction. A circumferential groove is formed in the bottom portion to face a stator coil in an axis of rotation direction. The circumferential groove is filled with a heat transfer gel. A coil end portion of the stator coil is inserted into the heat transfer gel.

Abstract: A power control for an inductive machine comprises a printed circuit board having an electronic control element for controlling a current through the inductive machine, an electrical connection of the printed circuit board, a cooling element, connected in a thermally conductive manner to the control element, and a choke at the electrical connection for suppressing interference emissions. The choke is connected thereby to the cooling element in a thermally conductive manner.

Abstract: A temperature estimating device configured to estimate a temperature of an electric motor includes a temperature detecting part for acquiring a detected temperature detected by a temperature sensor attached to the electric motor, a memory part for successively storing the detected temperature acquired by the temperature detecting part at a predetermined sampling period, and a temperature estimating part for using the detected temperature stored by the memory part, a ratio of amount of change of the detected temperature with respect to time, and a coefficient as the basis to estimate a temperature of a measurement target part of the electric motor.

Abstract: A motor has a stator, a rotor, an end cover assembly installed on an axial end of the stator and the rotor. The rotor includes a shaft. The end cap assembly includes an end cap, a cover, and a circuit board arranged between the cover and the stator. At least one electronic element is mounted on the circuit board. The shaft passes through a hole in the cover. The cover and the shaft are made of a conductive material. With such structure damage to the circuit board and the electronic element due to high-voltage static electricity is avoided.

Abstract: An integrated system includes a controller, a drive device, and a fastening supporting member. The controller has a controller connector. The drive device has a drive device connector which is connected to the controller connector so that the drive device is electrically coupled to the controller. Via the fastening supporting member, the controller and the drive device are maintained in an electrically coupled state in which the drive device connector is connected to the controller connector. At least part of the controller connector and the drive device connector, as viewed from a vertical direction, is disposed within an area from a first line segment which is perpendicular to a virtual line connecting a center of gravity of the controller and the fastening supporting member and which passes the center of gravity to a second line segment which is perpendicular to the virtual line and which passes the fastening supporting member.

Abstract: An arc welding/brazing process is disclosed that is useful to join together a first copper piece and a second copper piece without damaging more heat-sensitive materials that may be located nearby is disclosed. The arc welding/brazing process includes using a non-consumable electrode wire, which electrically communicates with a weld control in a straight polarity orientation, to strike an arc across a gap established between a leading tip end of the electrode wire and the first copper piece. The current that flows through the arc when the arc is established heats the first copper piece such that the first copper piece becomes joined to a second copper piece. The joint between the first copper piece and the second copper piece may be an autogenous weld joint or a braze joint.

Abstract: A claw-pole motor for driving a centrifugal pump includes stator laminations in the form of annular discs with claw poles adjoining said stator laminations, which claw poles are arranged opposite permanent-magnet poles of a rotor, a ring-shaped winding and an insulating body, which is arranged between the stator laminations and the winding, and a magnetic return path ring, which is arranged radially around the winding and the stator laminations and bears fixedly against the stator laminations.

Abstract: A rotor for a high-speed, high-power electric motor includes, according to the rotor axis, a magnetic mass surrounded on both sides by short-circuit rings, and crossed at several notches by electrical conductors connecting the short-circuit rings to form a squirrel cage. Each electrical conductor is formed of a single bar having a trapezoidal section over its entire length.

Abstract: The invention implements a variation of the electrical transverse flux machine (motor or generator) that employs ferromagnetic excitation elements mostly located on the stator rather on the rotor. The excitation elements are employed in nearly-complete magnetic circuits that are periodically completed by the movement of the rotor. The varying flux that is thus generated is used to cause an EMF in windings, for the case of generators, or for the case of motors, appropriate EMF is used to cause varying flux that in turn causes rotation of the motor.

Abstract: A linear vibrator that transmits tactile signals to a user of a mobile phone, PDA, or a portable game console. The linear vibrator uses rubber or silicone rubber having lower elasticity as a material of an elastic body secured to a casing or a base for supporting an oscillator horizontally moving by an electromagnetic force relative to a facing stator, thereby lowering the frequency sensitivity due to a characteristic frequency; reducing various errors of parts and errors in part assembly, thus resulting in smaller deviations of characteristic frequencies between products from mass production; and significantly reducing production cost by using an elastic body made of rubber or silicon rubber instead of steel plate or wire, thereby efficiently producing a structure through a simple assembly process and reducing the manufacture facility cost and labor cost resulting in improved productivity.

Abstract: A linear controlled motion system includes a track having at least one mover mounted to the track and effective for receiving articles at one location and transporting the articles to another location. The system includes at least one magnetic linear motion motor for providing a magnetic field effective for moving each mover in a controlled motion along the track. To reduce the cogging effect of the magnetic linear motion motor, at least one bridge element is disposed between the teeth of the motor. For example, slots may be formed in the top portions of each tooth, and individual bridge elements may be slid into the slots. The bridge elements may be made of a material having a relatively high magnetic permeability to reduce the cogging effects of the motor.

Abstract: A ball spline shaft integral with a foremost and rearmost nozzle fits into a movable table for an actuator to make sure of high accuracy and high tact operation. A movable table is constituted with a movable table in which a ball spline shaft to provide a ball spline is inserted into a table body. The ball spline shaft having a through-hole has a foremost nozzle at the lower portion thereof and a rearmost nozzle at the top thereof. An outer shell is fastened to the opposite ends of the bed and the ball spline shaft is supported by a pair of the outer shells for reciprocating movement.

Abstract: A voice coil motor 2 using a Dual Halbach Magnet Array has an outer magnet array 5 and an inner magnet array 6, wherein the inner magnet array 6 comprises axially magnetized magnets 6A, 6C and 6E and radially magnetized magnets 6B and 6D. Each of the axially magnetized magnets 6A, 6C and 6E of an inner magnet array 6 is formed of a monolithic magnet having ring-shape, whereas each of the radially magnetized magnets 6B and 6D of the inner magnet array 6 is formed of a plurality of split magnets divided in a circumferential direction. A fixing means 13 is provided to fix the radially magnetized magnets 6B and 6D and the axially magnetized magnets 6A, 6C and 6E of the inner magnet array 6 in an axially clamped manner.

Abstract: A power supply circuit includes a control switch, a synchronous switch, an inductor, and a voltage ramping circuit. A common node in the power supply serially connects the control switch to the synchronous switch. The common node is further coupled to the inductor that supplies current to a load based on switching the control switch and the synchronous switch to respective ON/OFF and OFF/ON states. The voltage ramping circuit generates and controls ramping of a gate voltage of the control switch based at least in part on a magnitude of a feedback voltage received on a circuit path from the common node. The multi-stage ramping of a switch control voltage reduces one or more of the following: i) QRR losses, ii) switching losses, and/or iii) a dead time of the power supply.

Abstract: A gate driver circuit capable of quickly driving a semiconductor device without erroneous ignitions. It has a positive power supply for forward bias, a negative power supply for backward bias, a first bias circuit that outputs the positive- or negative-power-supply voltage according to gate driver signal S, a capacitor that is charged by the negative-power-supply voltage when the first bias circuit outputs the negative-power-supply voltage, and a second bias circuit that supplies the gate of the semiconductor device with the positive- or negative-power-supply voltage according to gate driver signal S. Only in an early stage of a transition period during which the semiconductor device is turned on, the second bias circuit supplies the gate of the semiconductor device, instead of the positive-power-supply voltage, with a voltage boosted by adding the charged voltage of the capacitor onto the positive-power-supply voltage outputted from the first bias circuit.

Abstract: Inrush current is a critical, undesirable behavior that results from the uncontrolled start-up or shut-down of voltage regulators. Large inrush currents lead to voltage overshoot at the output node of voltage regulators and this can damage the regulator load, in addition to peak current that can damage the packaging or the regulator itself. Embodiments of the invention introduce methods of inrush current reduction based on voltage reference generation. For example, one method is based on multiple filtered steps of the voltage reference for the voltage regulator. For example, another method is based on creating a voltage reference signal that has a continuous slope starting from zero and ending at zero. Embodiments of the invention reduce or limit the inrush current for sensitive applications.

Abstract: An active load circuit applicable to a power supply. The active load circuit includes a control circuit, a dummy load and an active switching circuit. The control circuit is coupled to a ground terminal, an output terminal of a power supply and the detection circuit. The dummy load is coupled to the output terminal The active switching circuit is coupled to the control circuit, the dummy load and the ground terminal. The control circuit receives an output voltage via the output terminal and receives a power-good input signal via the detection circuit. When a voltage level of the power-good input signal is lower than a threshold value, the control circuit controls the active switching circuit to enter a load-on mode so that the dummy load is connected to the ground terminal and that the output terminal is connected to the dummy load.

Abstract: A semiconductor stack for a converter comprises two series-connected semiconductor switches; two terminals for connecting a cell capacitor, which are connected to one another by the two semiconductor switches; at least one cooling element arranged between the semiconductor switches; a frame, by which the semiconductor switches and the cooling element are fixed to one another and which provides the terminals; and at least two snubber capacitors which are mechanically fixed to the frame and which are connected in parallel, are connected to the terminals and which in each case form a commutation loop with the semiconductor switches.

Abstract: The present examples relate to a power factor correction device, a power factor correction method, and a corresponding converter, in which when an input signal inputted into the converter is changed, a reference signal is also changed to fit to the input signal in consideration of only the frequency and the phase of the input signal. Thus, even without a specifically designated control circuit, examples make it possible to improve power factor correction and Total Harmonic Distortion (THD) and to reduce the size of a semiconductor chip, and examples are potentially used for a device receiving waveforms other than a sine wave.

Abstract: The present invention discloses a power supply circuit with power factor correction (PFC) function, and an automatic gain control circuit therefor and a control method thereof. The power supply circuit includes the automatic gain control circuit and a load driver circuit. The automatic gain control circuit converts an input voltage to a regulation voltage, and the load driver circuit generates an output current according to the regulation voltage. The automatic gain control circuit automatically adjust the regulation voltage such that the regulation voltage has a substantially fixed amplitude or fixed average value under different input voltages of different specifications, and the output current provided by the load driver circuit varies in phase with the input voltage to provide a PFC function.

Abstract: A power supply device includes a master power supply module, a slave power supply module and a control module. The master power supply module is configured to output a master output current and an output voltage according to a master control signal. The slave power supply module is electrically connected in parallel to the master power supply module and configured to output a slave output current and the output voltage according to a slave control signal. The control module is electrically connected to the master power supply module and the slave power supply module and configured to output the master control signal according to the output voltage, generate a current compensation signal according to the master output current and the slave output current, and output the slave control signal according to the output voltage and the current compensation signal which is based on the master output current.

Abstract: A data pin reference voltage generation circuit may include a voltage difference storage block configured to accumulatively store a difference between an input signal received through a data pin and a reference voltage for a preset time. The data pin reference voltage generation circuit may include a code generator configured to generate a voltage generation code based on the voltage difference stored in the voltage difference storage block. The data pin reference voltage generation circuit may include a reference voltage generator configured to generate the reference voltage based on the voltage generation code.

Abstract: A single-inductor multiple-output (SIMO) power converter converts an input voltage into an output voltage and a biasing voltage. The SIMO power converter comprises an inductor and a primary power switch, and a control circuit. The inductor is configured for storing energy from the input voltage. The primary power switch has a control node and is connected between the inductor and the output voltage which powers an output load. The control circuit controls the primary power switch comprising an auxiliary power switch and a driver. The auxiliary power switch is connected between the inductor and the biasing voltage. The driver, powered by the biasing voltage, drives the control node. The biasing voltage determines a signal level at the control node. The primary power switch and the auxiliary power switch are controlled to distribute the energy stored in the inductor to the output voltage and the biasing voltage.

Abstract: In a controller for applying a first drive voltage signal to one of parallel-connected first and second switching elements to perform a predetermined switching operation of one of the first switching element and the second switching element according to change of a first drive voltage in one of the first and second switching elements, a voltage detector detects the first drive voltage of one of the first and second switching elements. A delaying unit delays an application of a second drive voltage signal to the other of the first switching element and the second switching element to perform the predetermined operation of the other of the first switching element and the second switching element according to change of a second drive voltage in the other thereof while the first drive voltage in one of the first and second switching elements is substantially a predetermined Miller voltage.

Abstract: In an embodiment a shunt driver circuit has a first and a second connection terminal (N1, N2) forming a two-wire interface (N1, N2), the first connection terminal (N1) being prepared to receive a supply power and to provide an output signal (Sout), the second connection terminal (N2) being connected to a reference potential terminal (10), an Operational Transconductance Amplifier, OTA, (11) comprising a first input coupled to the first connection terminal (N1), a second input for receiving a first reference signal (Sref1) and an output (12) for providing a signal (S12) depending on a difference between an input signal on the first input and the first reference signal (Sref1), a capacitor (C1) coupled between the output (12) and the first input of the OTA (11) via the second connection terminal (N2) in a control loop, and a controlled current source (13) coupled between the output (12) of the OTA (11) and the second connection terminal (N2).

Abstract: A control scheme and architecture for a power conversion circuit employs two bidirectional switches and a zero voltage switching (ZVS) scheme for the high-side switch. Methods of incorporating the control scheme into multiple power conversion circuit topologies are disclosed. Methods of device integration including co-packaging and monolithic fabrication are also disclosed.

Abstract: Malfunctions of a switching device included in a power factor corrector are reduced when an instantaneous voltage drop or an instantaneous power failure occurs. If the instantaneous voltage drop or the instantaneous power failure occurs in an AC power source while the power factor corrector is performing a power factor correction operation by boosting an input voltage, an instantaneous power failure controller turns off the switching device included in the power factor corrector so that the power factor correction operation stops. When the commercial power source recovers, too, the power factor corrector suspends the power factor correction operation.

Abstract: A power converter determines a feedback signal according to a voltage signal related to an output voltage of the power converter and a reference voltage, thereby regulating the output voltage. A control circuit and method for programming the output voltage of the power converter utilize an offset current generator to inject a current or sink a current for changing the voltage signal or the reference signal, thereby adjusting the output voltage. As a result, it gets rid of complicated circuitry but provides more steps adjustment, which reduces related costs.

Abstract: Circuitry for damping transitions in an input current of a power converter includes a transistor with a control terminal coupled to receive an impedance control signal and main terminals coupled to variably impede the input current of the power converter in response to the impedance control signal. An impedance control circuit is coupled across input rails of the power converter to provide the impedance control signal. The impedance control circuit includes a first current conduction path coupling the control terminal to a first of the input rails of the power converter, and a second current conduction path coupling the control terminal to a second of the input rails of the power converter. The second of the input rails of the power converter is coupled to the main terminals of the transistor.

Abstract: There is disclosed a controller configured to control a synchronous rectification MOSFET having a drain, a source and a gate; the controller comprising a regulator configured to regulate a voltage between the drain and the source to a first regulation voltage, and a gate charger operable during a turn-on phase of the synchronous rectification MOSFET operation and configured to regulate a voltage between the drain and the source to a second regulation voltage having a larger absolute value than the absolute value of the first regulation voltage, wherein the gate charger is further configured to, when in operation, disable the regulator. Also disclosed is a switched mode power converter comprising such a synchronous rectification MOSFET, and a method for controlling such a synchronous rectification MOSFET.