Abstract: The invention relates to an actuator device for torque transmission equipment such as a clutch, e.g. a friction clutch or dog clutch, or a brake, comprising at least two electric motors, wherein the rotors of the electric motors are kinematically coupled together via a summation gear, and the summation gear has an output side which is coupled to an actuator of the torque transmission equipment in such a way that a state of the actuator can be set as a function of a relative rotation between the two rotors.

Abstract: An appliqué for adoring a bicycle wheel rim comprises a series of arced members bearing adhesive on one side, each adapted to partially cover a portion of the wheel rim. The arced members may be reflective, phosphorescent, or may have customized and customizable designs incorporated thereon. The arced members have complimentary ends such that when alighted end-to-end they cover the entire bicycle rim. To apply the arced members, a user first peels off a backer paper to expose the adhesive side of the arced member, applies the arced member to a wheel rim, then uses a smoothing tool to remove any bubbles, subsequent arced members are applied in a similar manner to cover the wheel rim.

Abstract: A cycle wheel rim having an axis and a median plane perpendicular to the axis, the rim comprising an upper bridge and at least one left lateral flange extending from the upper bridge and extended by a hook projecting radially towards the axis and axially towards the median plane, the upper bridge including a stop positioned on the same side of the left lateral flange in relation to the median plane, so that the left lateral flange, the hook, and the stop demarcate a left channel open upward, the amplitude of the opening of the channel, defined by the distance between the hook and the stop being less than the greatest amplitude of the channel. The depth of the channel, measured between the top of the hook and the bottom of the gutter, is less than 6.0 mm, or less than 5.

Abstract: A clamp-hubcap assembly is provided. The assembly may include a clamp, a hubcap, and a retaining device. The retaining device may be any suitable structure capable of coupling the clamp and the hubcap together.

Abstract: A wheel assembly includes a spindle; a wheel hub rotatable relative to the spindle; a seal mounted between the spindle and the wheel hub, the spindle, the wheel hub, and the seal defining a sealed cavity; and at least one bearing mounted between the spindle and the wheel hub within the sealed cavity, the at least one bearing facilitating rotation of the wheel hub relative to the spindle.

Abstract: A wheel bearing has a seal device formed as a pack seal with an annular sealing plate and slinger. The sealing plate has a metal core and an integrally adhered sealing member. The sealing member has a base portion, side lip and radial lip. The base portion covers an inner circumferential surface of the metal core. The radial lip slidingly contacts the cylindrical portion of the slinger. A garter spring is mounted on the radial lip. A tightening force of the garter spring is set to 50% or more of a total tightening force of the radial lip. The tightening force of the radial lip without the garter spring is set to 3 N or more.

Abstract: Disclosed are an electronic brake system and a control method thereof. The electronic brake system includes a master cylinder including a piston, an output rod contacting the piston, an input rod configured to be moved forward by a driver's manipulation of a brake pedal and arranged coaxially to the master cylinder and spaced a predetermined isolation gap apart from the output rod, an electrically-driven booster including a motor, a ball screw to move the output rod, and a motion converting unit to move the ball screw forward and backward by converting rotational movement of the motor into linear movement, and an electronic control unit (ECU) to control operation of the motor based on the size of the isolation gap. When the ball screw is moved backward in an ABS mode, the ECU stops backward-movement of the ball screw before the output rod collides with the input rod.

Abstract: The invention relates to an electrohydraulic pressure control device for vehicle brake systems, including at least one electronic control unit, at least one hydraulic unit and at least one electric motor for driving a hydraulic pump, wherein the electronic control unit is mechanically connected to the hydraulic unit and is sealed off from the outer environment in at least one connection zone to the hydraulic unit by a circumferential, in particular elastic sealing material, and the sealing material extends along an edge of the substantially cuboid-shaped hydraulic unit, wherein the edge is formed by a face of the cuboid-shaped hydraulic unit facing the electronic control unit and at least one face of the cuboid-shaped hydraulic unit not facing the electronic control unit, and the sealing material at least partially covers both cuboid faces in the connection zone and/or sealing zone.

Abstract: The invention relates to a spring-force brake system having a brake operating unit, having at least one sensor for detecting a driver braking demand upon operation of the brake operating unit by the driver, having at least one actuation unit for setting and regulating a braking force. For this purpose, it is provided according to the invention that at least one primary electronic control and regulating unit is provided which is connected at the signal input side to at least one sensor and which activates the actuation unit as a function of or on the basis of the signals of the sensor, and that at least one secondary control and regulating unit is provided which is connected at the signal input side to at least one sensor and which activates the actuation unit on demand on the basis of or as a function of signals of the sensor.

Abstract: The invention relates to an electronically regulable brake system, with an actuating device, in particular a brake pedal, a main brake cylinder arrangement with at least two parallel arranged piston cylinder units and a reservoir, which are connected via hydraulic lines and valves to wheel brakes, and with a servo mechanism. According to the invention an electrically drivable valve device (BV1, BV2, EA) is provided between the brake circuits allocated to the piston cylinder units (16, 17), in order to allow the regulated transfer of hydraulic fluid between the brake circuits (bypass) and the reservoir (24).

Abstract: An apparatus, modular devices, and methods are disclosed. One method comprises receiving electric power at a modular device from a vehicle battery, wherein the modular device has a housing and a circuit protection block accessible through a first opening in the housing; and transmitting the received electric power to one or more external devices via one or more of a plurality of ports accessible through a plurality of second openings formed in the housing.

Abstract: A battery arrangement for a motor vehicle, includes a plurality of battery modules, each of the battery modules having a plurality of battery cells and being coupled to a control unit, and a high voltage lead wire for electrical coupling being provided between all adjacent battery modules, the control units each being designed to exchange data via the high voltage lead wire.

Abstract: Described are power management systems having at least one fuel cell system, a power distribution unit, at least one galley insert, a galley network controller, a control panel, and/or at least one battery pack. The power management system compares a power output from the power distribution unit to a maximum load level and/or to a minimum load level, instructs the galley network controller to cycle the the galley insert off and/or set an operation of the galley insert to a lower power consumption level when the power output approaches and/or is above the maximum load level, and instructs the galley network controller to cycle the galley insert on and/or set the operation of the galley insert to a higher power consumption level when the power output approaches and/or is below the minimum load level.

Abstract: The invention relates to a method for managing the load profile of a low or medium voltage electric network that is supplied by at least an electric power source. The electric network comprises one or more electric loads and one or more controllable switching devices for disconnecting/connecting said electric loads from/with said electric power source. The method comprises the step of measuring a time window from a reference instant, the step of determining at least a check instant comprised in said time window and the step of executing a load profile control procedure at said check instant. In a further aspect, the invention relates to a control system for executing the above described method.

Abstract: Systems and methods of the invention relate to circuitry that isolates low power circuitry of a battery management system. One or more circuits can be utilized with a battery management system to provide isolation of low power circuitry from at least one of a high voltage, noise interference from a battery, noise interference from a high voltage, sensor signals, control signals, among others. The circuitry further provides high voltage from a grid to be stepped-down to a voltage level usable by circuitry, port(s), and/or a processor.

Abstract: A power transmission device has: a power transmission unit configured to perform wireless power transmission; a communication unit configured to perform wireless communication within a range wider than a power transmission possible range of the power transmission unit; and a power transmission control circuit configured to control power of wireless power transmission of the power transmission unit, wherein the power transmission control circuit controls the power of wireless power transmission of the power transmission unit according to a number of power reception devices for which the communication unit received a response indicating that power reception is performed from power reception devices receiving power equal to or more than a threshold when the power transmission unit performs power transmission by first power, and a number of power reception devices for which the communication unit received a response indicating that power reception is performed from power reception devices receiving power equal to

Abstract: A four-terminal circuit element is described that includes a photonic core inside of the circuit element that uses a wide bandgap semiconductor material that exhibits photoconductivity and allows current flow through the material in response to the light that is incident on the wide bandgap material. The four-terminal circuit element can be configured based on various hardware structures using a single piece or multiple pieces or layers of a wide bandgap semiconductor material to achieve various designed electrical properties such as high switching voltages by using the photoconductive feature beyond the breakdown voltages of semiconductor devices or circuits operated based on electrical bias or control designs. The photonic core aspect of the four-terminal circuit element provides unique features that enable versatile circuit applications to either replace the semiconductor transistor-based circuit elements or semiconductor diode-based circuit elements.

Abstract: An electrical power system includes a power grid and a plurality of power plants connected to the power grid. A central repository including one or more electrical energy storage devices is connected directly to the power grid. The one or more energy storage devices are configured to be connected to the power plants via the power grid. The central repository is operable to draw a portion of a power output produced by one or more of the power plants via the power grid during a first period, for storage therein. The central repository is operable to discharge power to the power grid during a second period shifted in time from the first period. The discharged power is a function of a grid requirement or a function of a power demand notified by an individual power plant of the electrical system.

Abstract: A voltage output circuit includes a first power supply terminal, a second power supply terminal, an output terminal, a switch circuit present in a supply path of a voltage from the second power supply terminal to the output terminal and configured to supply the voltage from the second power supply terminal to the output terminal when the switch circuit is in a closed state and interrupt the supply of the voltage from the second power supply terminal to the output terminal when the switch circuit is in an open state, a switch control circuit configured to fix the switch circuit in the open state on the basis of the voltage at the second power supply terminal, and a switch control circuit configured to release the fixing of the open state of the switch circuit on the basis of the voltage at the first power supply terminal.

Abstract: In a control device configured to control power to be supplied to a specific load from at least one of a converter that has a power generator and a storage battery, and a commercial power supply, the control device determines whether the commercial power supply is in a power failure state or a power distribution state, in which: when determining that the commercial power supply is in a power distribution state, the control device causes both of the converter and the commercial power supply to be connected to the specific load; and when determining that the commercial power supply has made a transition from a power distribution state to a power failure state, the control device causes the commercial power supply to be disconnected from the specific load while maintaining the connection between the converter and the specific load.

Abstract: This document discusses, among other things, apparatus and methods for an edge rate driver for a power converter switch. In an example, the driver can include an input node configured to receive a pulse width modulated signal, a first switch configured to couple a control node of the power converter switch to a supply voltage during a first state, a second switch configured to couple the control node of the power converter switch to a reference voltage during a second state, and a first current source configured to supply charge current to the first switch when the power converter switch transitions from the second state to the first state, the charge current configured to charge a parasitic capacitance of the power converter switch.

Abstract: The present invention relates to an electronic device comprising a power supply module connected to a converter system, wherein said power supply module comprises a plurality of elements for producing electricity from renewable energy connected in series and said elements for producing electricity from renewable energy are assembled in groups, characterised in that the converter system comprises a plurality of regulator circuits, each regulator circuit being connected to a group of elements for producing electricity from renewable energy so that each group of elements for producing electricity from renewable energy can be controlled separately.

Abstract: The invention relates to a control module for an electric energy store for operation on a supply line, which is configured for the parallel connection of a plurality of consumers, comprising a supply terminal for connection to the supply line, and comprising a control unit for the controlled charging and/or discharging of an electric energy store via the supply terminal, wherein the control module is connected or can be connected to the electric energy store, the control module can be connected to a delimiting device, and the control unit is configured, when the control module is connected to the delimiting device, to perform a rapid charging and/or a rapid discharging of the energy store.

Abstract: A power stage to generate an output voltage at one of a high reference voltage, an intermediate reference voltage and a low reference voltage, including a first switch stage connecting the output terminal to the high reference voltage, comprising a pair of transistors connected in series along their source-to-drain paths, a first transistor coupled to the output terminal and having its gate biased at the intermediate voltage, a second transistor having a gate that receives a first stage control signal that varies between the high reference voltage and the intermediate reference voltage, a second switch stage connecting the output terminal to the intermediate reference voltage, having a gate that receives a second stage control signal that varies among the high reference voltage, intermediate reference voltage and low reference voltage, a third switch stage connecting the output terminal to the low reference voltage, having a pair of transistors connected in series along their source-to-drain paths, a first tr

Abstract: A solar energy generation system a measurement module and a positioning method are disclosed herein. The positioning method is adaptable to a power generation system having AC generation modules. Each of the AC generation modules generates an output current and is electrically connected to each other in a power-supply network. The positioning method includes the following operations: (a) measuring AC currents or node voltages generated by the AC generation modules at different positions in the power-supply network to obtain current parameters or voltage parameters; and (b) determining a sequence of relative positions of the AC generation modules by calculating the current parameters or the voltage parameters.

Abstract: Systems and methods to balance currents among a plurality of photovoltaic units connected in series. In aspect, a management unit is coupled between a photovoltaic energy production unit and a string of energy production units. The management unit has an energy storage element (e.g., a capacitor) connected to the photovoltaic energy production unit. The management unit further has a switch to selectively couple to the energy storage element and the photovoltaic energy production unit to the string. The management unit allows the current in the string to be larger than the current in the photovoltaic energy production unit.

Abstract: Embodiments of the present invention are directed to a multi-connection splice box. In one embodiment, the multi-connection splice box comprises a first plug having a first plurality of plug pins coupled to a plurality of conductors within a cable wherein the cable couples to an AC power line, and a second plug having a second plurality of plug pins coupled to the plurality of conductors, wherein the first plug detachably couples a first microinverter to the plurality of conductors and the second plug detachably couples a second microinverter to the plurality of conductors.

Abstract: There is provided a coil sheet including: a sheet having a spiral coil thereon; a core located at the central portion of the coil and having a thickness of t mm, wherein the core has a curvature in at least one of an upper surface of the core, a corner at which the upper surface and a side surface meet each other, and a position in which the core and the sheet meet each other.

Abstract: The present invention relates to a coil type unit for wireless power transmission, a wireless power transmission device, an electronic device, and a manufacturing method of a coil type unit for wireless power transmission. A coil type unit for wireless power transmission according to the present invention includes a coil pattern in the form of a wiring pattern; a magnetic portion having the coil pattern attached to one surface thereof; and an adhesive portion interposed between the magnetic portion and the coil pattern to bond the magnetic portion and the coil pattern, wherein the magnetic portion is formed by laminating one or more conductive sheets with one or more magnetic sheets and integrally firing the laminated sheets, and the magnetic portion has conductive holes in the position, where both ends of the coil pattern are disposed, to electrically connect the both ends of the coil pattern and the conductive sheet.

Abstract: A power transmitting device includes a power transmitting portion that contactlessly transmits electric power to a power receiving portion. The power transmitting portion has a resonance coil (24) and a tubular member (240) that faces the resonance coil (24). At least one portion of the tubular member (240) is electrically cut off.

Abstract: A wireless power transfer system includes a power receiving device and a plurality of power transmission devices that perform power transfer to the power receiving device. The power receiving device transmits request-power to the power transmission device, the request-power being power the power receiving device requests to be supplied with. The power transmission device, when receiving the request-power from the power receiving device, generates determination reference information based on the received request-power, the determination reference information being information to be used as a determination reference when the power receiving device selects the power transmission device, and transmits the generated determination reference information to the power receiving device.

Abstract: Provided is a power receiving device including a power receiving coil which receives power supplied by electromagnetic waves, and a measurement coil which is disposed near the power receiving coil and measures an electromagnetic field.

Abstract: Devices and methods for supply or receiving electric power. A power supply method may include specifying a type of a power source, specifying a power receiving capability of a power receiving device, performing collation of the specified type of the power source with the specified power receiving capability, and controlling transmission of electric power from the power source of the specified type to the power receiving device based on the collation. A power receiving method may include specifying a type of a power source, specifying a power receiving capability of a power receiving device, performing collation of the specified type of the power source with the specified power receiving capability, and controlling, based on the collation, selective conversion of electric power transmitted from the power source of the specified type to the power receiving device.

Abstract: A non-contact power feeding apparatus transmits, by at least magnetic coupling, an electric power in a non-contact manner to a power reception coil from a power transmission coil. The transmission coil is electrically connected to an alternating-current power source. The non-contact power feeding apparatus outputs an electric power to a load electrically connected to the power reception coil. The non-contact power feeding apparatus includes a coupling state estimator configured to estimate a coupling state between the power transmission coil and the power reception coil. The non-contact power feeding apparatus also includes an available output power calculator configured to calculate an available output power that can be output to the load, based on a limit value of a circuit element of a power feeding circuit including the power transmission coil and the power reception coil and on the coupling state.

Abstract: Systems and methods for shut-down of a photovoltaic system. In one embodiment, a method implemented in a computer system includes: communicating, via a central controller, with a plurality of local management units (LMUs), each of the LMUs coupled to control a respective solar module; receiving, via the central controller, a shut-down signal from a user device (e.g., a hand-held device, a computer, or a wireless switch unit); and in response to receiving the shut-down signal, shutting down operation of the respective solar module for each of the LMUs.

Abstract: A photocontrol includes a switch that consumes very low power when the switch is turned ON and when it is turned OFF. The photocontrol can provide low-power digital control signals to high-impedance inputs of control devices that control the delivery of power to load devices, such as LED drivers that control the delivery of power to arrays of LEDs. The photocontrol also can provide power signals to control devices that control the delivery of power to light sources, such as electronic transformers that control the delivery of power to fluorescent lamps. The photocontrol may include a comparator that causes the photocontrol to have switching hysteresis.

Abstract: The present disclosure may provide various electric transmitter arrangements which may be used to provide wireless power transmission (WPT) while using suitable WPT techniques such as pocket-forming. In some embodiments, transmitters may include one or more antennas connected to at least one radio frequency integrated circuit (RFIC) and one microcontroller. Transmitters may include communications components which may allow for communication to various electronic equipment including phones, computers and others. Transmitters for wireless power transmission may be feed by a power source, which may have suitable connection with transmitters through several power couplings, including screw caps for light sockets, cables, power plugs among others. Power couplings may depend on final application and user preferences.

Abstract: A battery pack discharging device having a hand-held member and a docking device are provided. The hand-held member has a handle portion, first and second extension members, first and second conductive members, and a resistor. The resistor is disposed in the handle portion between the first and second conductive portions. The device further includes a docking device having a housing and first and second contact members. The first and second extension members are disposed in the first and second apertures, respectively, of the docking device such that the first and second conductive members contact the first and second contact members, respectively.

Abstract: The application describes an electromechanical actuator for generating a mechanical force to be transferred to an apparatus. The electromechanical actuator comprises an electromagnetic coil, a connecting member, and a magnet. The connecting member is mechanically coupled between the electromagnetic coil and the apparatus and is configured to transfer the mechanical force from the electromagnetic coil to the apparatus. The magnet is disposed between the electromagnetic coil and the apparatus and includes a channel in which the electromagnetic coil is disposed, the channel having a channel opening that faces away from the apparatus, the magnet further having a central hole through which the connecting member extends.

Abstract: A linear motor includes a stator and an armature that faces the stator with a gap therebetween. The stator has an elongated shape extending so as to cross a direction in which the stator faces the armature, and includes a plurality of salient poles that are arranged along a longitudinal direction of the stator and protrude toward the armature. The armature includes an armature core including a tooth that protrudes toward the stator, an armature winding wound around the tooth, a plurality of permanent magnets disposed on an end side of the tooth so as to be arranged along the longitudinal direction of the stator, and a magnetic-field sensor that detects a magnetic field which is generated by the plurality of permanent magnets and which passes through the plurality of salient poles.

Abstract: A method for making an actuator includes forming a substantially planar actuator device of an electrically conductive material, the device incorporating an outer frame, a fixed frame attached to the outer frame, a moveable frame disposed parallel to the fixed frame, a motion control flexure coupling the moveable frame to the outer frame for coplanar, rectilinear movement relative to the outer frame and the fixed frame, and an actuator incorporating a plurality of interdigitated teeth, a fixed portion of which is attached to the fixed frame and a moving portion of which is attached to the moveable frame, moving the moveable frame to a deployed position that is coplanar with, parallel to and spaced at a selected distance apart from the fixed frame and fixing the moveable frame at the deployed position for substantially rectilinear, perpendicular movement relative to the fixed frame.

Abstract: A linear motor, comprises at least one stator device (14) with a plurality of permanent magnets (18, 18-1, 18-2) of different polarity and with at least one carrier rail (24), and at least one rotor device (12) with at least three electrical coils (44) and with at least one supporting means (26), which can be or which is supported on the carrier rail (24) of the stator device (14), wherein the rotor device (12) and the stator device (14) are moveable to and fro with respect to each other along a movement direction (FR) defined by the carrier rail (24) by interaction of magnetic fields of the permanent magnets (18, 18-1, 18-2) with the magnetic fields of the coils (44), through which current flows if required, wherein the stator device (14) is formed from at least one stator module (16-1, 16-2), wherein the stator module (16-1, 16-2) is configured such that a stator device (16) with two or more consecutively arranged stator modules (16-1, 16-2) can be formed, and wherein at the stator module (16-1, 16-2) at le

Abstract: An electromagnetic engine including a plurality of pistons and a plurality of corresponding electromagnets. The pistons are each connected to a crankshaft and fabricated of a ferrous material. The electromagnets are spaced from the pistons in alignment therewith. An electrical power source is provided to power the electromagnets, and a control assembly is provided to control the sequence of energizing the electromagnets, so that by energizing the electromagnets, the pistons will be pulled toward the electromagnets in response to a timely applied electromagnetic field. The force imparted on the piston is transmitted by the rod to the crankshaft, which provides power via an output shaft for desired uses.

Abstract: A stator bar includes a substantially quadrangular conductive element made of a plurality of interwoven strands. The stator bar also includes an electric insulation applied around the conductive element and including a plurality of corners corresponding to corners of the conductive element. The electric insulation includes an inner insulation zone facing the conductive element, and an outer insulation zone surrounding the inner insulation zone. The radius of at least one of the corners is between 1.5-2.5 millimeters. Permittivity at the corners of the electric insulation decreases by 35-45% from the inner insulation zone facing the conductive element towards the outer insulation zone. The insulation includes at least one mica layer, where one of the at least one mica layer includes titanium dioxide (TiO2).

Abstract: A winding for a rotor for use in an electrical generator utilized in the power generation industry. The winding includes a plurality of axial sections and a plurality of transversely oriented end arc sections. An integrated leg section extends from each end arc section to form an associated corner section at an intersection of each leg section and associated end arc section. Each leg section is affixed to an associated axial section at a joint that is spaced apart from an associated corner section such that the joint is not subjected to stress concentration which occurs at the associated corner section.

Abstract: A Wye ring system for a rotor of a generator includes a replacement Wye ring configured to replace an existing Wye ring serving as a floating neutral connection in the rotor. The replacement Wye ring is positioned radially inside the existing Wye ring and co-axial with the rotor. A fastening system is configured for mechanically and electrically connecting the replacement Wye ring to a plurality of connection lugs. The plurality of connection lugs are electrically connected to the rotor windings. The replacement Wye ring replaces the floating neutral connection of the existing Wye ring.

Abstract: A high-output, high-efficiency and high-quality rotating electrical machine is provided which has a stator shaped to avoid interference between coil end portions even in cases where the coil space factor of stator coils is raised and the stator coils are formed by winding continuous wires, each having a rectangular cross-section, for high productivity. The stator coils include coils of plural turns straddling plural slots with the coils thus wound interconnected, to be continuous, with connectors. The stator has a stator core mounted, around an entire periphery thereof, with plural stator coils. The coil-end apex portions, disposed on both axial end sides of the stator core, are each approximately Z-shaped without any twisted portion. Each coil-end apex portion is divided into levels of different heights from the stator core end face in the axial direction. In this way, the thickness of overlapping coil layers is reduced to avoid interference between coil end portions.

Abstract: A motor includes a power supplying brush, a brush holder, a choke coil, and a power supplying terminal. The brush holder holds the power supplying brush. The choke coil includes a coil portion having a coil shape, an iron core, a first connecting portion, and a second connecting portion. The iron core is inserted into the coil portion. The iron core is longer than an axial length of the coil portion. The iron core has a projecting portion projecting from the coil portion in an axial direction of the coil portion. The first connecting portion extends from an axial first end of the coil portion. The second connecting portion extends from an axial second end of the coil portion. The power supplying terminal is assembled to the brush holder. The power supplying terminal connects with at least one of the first connecting portion and the second connecting portion. At least one of the power supplying terminal and the brush holder includes an iron core holding portion that holds the projecting portion.

Abstract: An assembly includes a rotating shaft supported with respect to a stationary housing by at least one active magnetic bearing presenting a mean radial air gap and at least one auxiliary bearing having first and second coaxially arranged annular surfaces is provided. One of the first and second coaxially arranged annular surfaces defines a clearance (E2) with one of the stationary housing and the rotating shaft, the clearance (E2) being less than the mean radial air gap and the other of the first and second coaxially arranged annular surfaces being integral with the other one of the stationary housing and the rotating shaft. The auxiliary bearing provides a first ball bearing and a second ball bearing having a misalignment with respect to each other in order to increase the starting torque.

Abstract: An interior permanent magnet motor includes a stator having teeth on which a coil is wound, a rotor rotatably provided inside the stator, the rotor including a plurality of rotor sectors, and at least two permanent magnet recesses formed between the rotor sectors. Ferrite permanent magnets are embedded in predetermined ones of the permanent magnet recesses that are formed in an inner portion of the rotor. Rare-earth permanent magnets are embedded in the other ones of the permanent magnet recesses that are formed in an outer portion of the rotor.