Abstract: A child restraint system for use in vehicles comprises a seat portion and a base. The base secures the child restraint system to a vehicle seat with a vehicle restraint such as a seat belt or a LATCH system. The base both engages the vehicle restraint and includes a force-multiplying mechanism for tensioning the vehicle restraint. Tensioning the vehicle restraint secures the base by forcing the base against the vehicle seat. An embodiment of the base includes a platform configured to rest on the vehicle seat, an upright member joined to the platform, and a tensioning device, including a force-multiplying mechanism, for tensioning the vehicle restraint.

Abstract: A driving device is adapted for an infant rocking chair. The rocking chair includes a seat body and a bottom seat. The driving device includes a base, a supporting element, first and second motion mechanisms, and a power mechanism. The first motion mechanism includes a horizontal first guide path unit disposed at the bottom seat, and a first movable member disposed on the base and movable along the first guide path unit. The second motion mechanism includes a vertically varying second guide path unit disposed at the bottom seat, and a second movable member movable along the second guide path unit and vertically relative to the base. The supporting element interconnects fixedly the seat body and the second movable member. The power mechanism drives reciprocal movement of the first and second movable members.

Abstract: A chair structure results in a proper counter force when an occupant reclines on a back. The chair is composed of a pintle, a base which is supported by the pintle, a back support which is installed on the back, a seat support which is installed on a seat, a first swaying pivot, a second swaying pivot which is located in front of the first swaying pivot, a third swaying pivot which is located between the first swaying pivot and the second swaying pivot, and a sliding structure. The chair is provided with simple structures, and can result in a constant counter force or maintain a proper counter force depending on an angle of the back, when the occupant reclines on the back.

Abstract: A seat includes a seat main body; first and second adjustable portions, each of which is provided on the seat main body and is placed in an adjustable state by operating force; an operating member which is displaced in a predetermined range; a first operating force transmitting portion for transmitting the operating force of the operating member to the first adjustable portion when the operating member is displaced in a first range; a second operating force transmitting portion for transmitting the operating force of the operating member to the second adjustable portion when the operating member is displaced in a second range; and an operation reaction force avoiding portion for keeping the first adjustable portion in the state that it is in when the operating member is displaced in the first range, when the operating member is displaced in the second range, by the input operating force.

Abstract: An adjustable seat for a vehicle includes a seat part that is moveable between a first seat position and a second seat position. The first seat position is spaced a first predetermined distance from a floor of the vehicle and the second seat position is spaced a second predetermined distance from the floor of the vehicle. A backrest pivotally connected to the seat part about a pivot axis. An adjusting device is operatively connected to the seat part for moving the seat part between the first seat position and the second seat position. The adjusting device includes an energy storage mechanism that exerts a variable first force on the seat part by pivoting the backrest from a folded over position to an upright position to move the seat part from the second seat position to the first seat position.

Abstract: A bench includes at least two feet, a plurality of seat plate, back plate, and armrest. A back portion is extended from an upper edge of the foot, a vertical cushion portion is formed to a bottom of the back portion. The seat plates and the back plates are fixed to the cushion portions and the back portions of the feet by bolts, and the armrests are fixed to the back plate and two lateral sides of the seat plate by bolts so as to form a strong and fine bench.

Abstract: A method of injection moulding a polymeric resin to form an article that is suitable for strain orientation. A thermoplastic polyester elastomer polymeric resin is provided. The resin is heated to form a molten resin at a temperature of at least about 240° C. The molten resin is injected into a mould (22) to substantially fill the mould and form an article. At least part of the article is a sheet part with a plurality of members that are integrally formed into the sheet part, with apertures provided between at least some of the members of the sheet part of the article to form a mesh. At least the sheet part of the article is suitable for strain orientation.

Abstract: A backrest assembly includes an annular front frame having a front surface on which inner and outer annular flanges are formed, defining a first annular groove therebetween. A plurality of pegs is formed in the annular groove. A net is mounted in front of the front frame in a tightened state and includes a plurality of peg holes. A periphery of the net covers the outer annular flange of the front frame and is received in the first annular groove. Each peg of the front frame extends through one of the peg holes. Inner and annular wall are formed on a front face of an annular rear frame and define a second annular groove therebetween. A plurality of stubs is formed in the second annular groove. Each stub includes a receptacle receiving one of the pegs. Fasteners are extended through engaging holes in the front and rear frames.

Abstract: A bench includes at least two feet and two seat plates. Each foot has a sustaining surface in a top thereof and a support frame in a bottom thereof. The seat plate is a rectangular plate. A plurality of protruding blocks is formed to a bottom surface of the seat plate, and a bolt block is embedded in each protruding block. By fastening the feet to the corresponding bolt blocks through holes with bolts, the feet are fixed to the seat plate so as to form a strong and fine bench.

Abstract: Disclosed is a regenerative braking system capable of minimizing uncomfortable feeling during the braking operation while improving responsiveness and control performance by performing the braking operation using an electric motor. An electro-mechanical braking system is used when braking a rear wheel or front and rear wheels, so variable frictional braking is achieved, thereby maximizing the recovery rate of the regenerative energy.

Abstract: Disclosed is a pump unit for an electronically controlled brake system. The pump unit is operated by a motor having a shaft to be rotated about a rotating axis, and the shaft includes a concentric shaft portion and an eccentric portion integrally formed with each other. An eccentric bearing is coupled to the concentric shaft portion and a concentric bearing is coupled to the eccentric portion, to reduce hydraulic pulsation during operation of pumps and achieve rapid generation of hydraulic pressure.

Abstract: Disclosed is a pump unit for an electronically controlled brake system. In the electronically controlled brake system having a motor unit to drive the pump unit, the motor unit includes a motor body having a rotating shaft, and a shaft separably coupled to the rotating shaft. The motor unit and pump unit may be assembled to each other in a simplified manner.

Abstract: A brake device comprising a master cylinder (2), a braking mechanism (C), a plurality of pedal operation detecting sensors (BS), a fluid pressure-generating mechanism (A) driven by a motor (M) to generate fluid pressure and to supply the generated fluid pressure to an input side of the braking mechanism (C), control means (B) for controlling the electric current value impressed on the motor (M) in accordance with the output values of the pedal operation detecting sensors (BS), and a fluid pressure sensor (FS) for detecting fluid pressure supplied to the input side of the braking mechanism (C) in order to render the brake device capable of executing control of the electric current value impressed on the motor even when primary failure occurs in the plurality of pedal operation detecting sensors; wherein the control means (B) controls the electric current value impressed on the motor (M) in accordance with the output values from the plurality of pedal operation detecting sensors (BS) in a case in which the rela

Abstract: Disclosed is a pump unit for an electronic control brake system. The pump unit includes first to third pumps arranged on a first plane at angular positions of 120°, 60°, and 180°, respectively, and fourth to sixth pumps arranged on a second plane spaced apart from the first plane in parallel to the first plane. The fourth to sixth pumps are arranged at angular positions 60°, 120°, and 180°, respectively, so that the hydraulic pressure pulsation is reduced during the pump operation and a brake oil pressure is rapidly formed.

Abstract: In an electrically driven brake booster wherein an electrically driven actuator moves a booster piston upon operation of a brake pedal to generate a hydraulic pressure for driving a brake force at the maser cylinder, the electrically driven actuator controls to move the booster piston as the pressing member in order to correctly detect presence/absence of an operation of the booster piston and detect a movement pattern of an input rot and an input piston as the shaft member relative to a movement of the pressing member. In accordance with the movement pattern, presence/absence of an operation of the brake pedal is detected. By confirming that the brake pedal is not operated, by the method described above, a zero point of a stroke sensor for detecting the position of the shaft member and zero points of oil pressure sensors for detecting a hydraulic pressure supplied by the master cylinder are learnt.

Abstract: An endless track for providing traction to a snowmobile is provided. The endless track comprises an elastomeric body comprising an inner side for facing a plurality of wheels of the snowmobile and a ground-engaging outer side for engaging the ground. The endless track also comprises a plurality of elastomeric traction projections on the ground-engaging outer side. The endless track is free of transversal reinforcing rods extending transversally to a longitudinal direction of the endless track. When the snowmobile is operated at a given speed, less noise is generated than if the endless track had transversal reinforcing rods embedded in the elastomeric body where respective ones of the elastomeric traction projections are located but was otherwise identical.

Abstract: In at least one embodiment, an apparatus for controlling a switching frequency of at least one power switch in a vehicle is provided. The apparatus comprises a power conversion circuit including a power switch. The power conversion circuit is configured to convert a first energy signal into a second energy signal and to control the power switch to operate at a first switching frequency, the first switching frequency generating a first set of harmonics. The power conversion circuit is further configured to receive frequency information from an entertainment device, the frequency information generating a second set of harmonics. The power conversion circuit is further configured to select a second switching frequency, the second switching frequency generating a third set of harmonics. The power conversion circuit is further configured to perform a distance measurement using the first set of harmonics, the second set of harmonics, and the third set of harmonics.

Abstract: A power supply with an integrated power system has a common transformer. After the power supply receives input power, the common transformer generates an induction power at the secondary side. The power supply further includes a standby power system receiving the induction power and outputting a standby power, an actuation switch with one end electrically bridging the common transformer and the standby power system, a primary power system connecting to the other end of the actuation switch, and a power management unit receives the standby power to be activated. The standby power system modulates and transforms the induction power to the standby power to start operation of the power management unit. Users can trigger the power management unit to output an enabling signal to conduct the actuation switch to be ON so that the primary power system can receive the induction power and transform to output the primary output power.

Abstract: An advanced connector assembly enabled to receive and distribute power signals. In one embodiment, the connector comprises a multi-port modular jack, and incorporates a PSE controller board disposed in the rear portion of the connector assembly, e.g., outside the connector housing. The PSE controller board controls the power to a powered device and. may be adapted to, for example, distinguish whether the device is a short circuit or a network interface card, guarantee the supply of power to selected ports, and prevent cables from transmitting abnormal power. Heat removal features are also optionally utilized to effectively dissipate heat produced by the electronic or signal conditioning components utilized on said multi-port modular jack. In some embodiments, the PSE controller board is also optionally made removable from the jack housing.

Abstract: Terminals of a battery apparatus is connected to terminals of a vehicle body controller, respectively, and terminals of the battery apparatus are connected to terminals of a charger, respectively. The terminals are connected to each other through a communication path, and the terminals are connected to each other through a communication path. A termination resistor and a switch are connected in series between the communication paths. A microcomputer controls the switch based on a voltage of the terminal.

Abstract: The disclosed system includes a metering device for monitoring electrical power grid conditions, a controller for determining if the metering device is detecting a condition on an electrical grid that is indicative of a delayed voltage recovery event, and a communication device for communicating with one or more remotely located bi-directional power source modules connected to the electrical power grid, wherein the controller is programmed to send a notification via the communication device to the one or more remotely located bi-directional power source modules if the controller detects a condition indicative of delayed voltage recovery event. In some embodiments, the metering device includes a grid metering device. In some embodiments, the metering device measures power factor, and a change in the voltage and ratio of VARs to Watts.

Abstract: A power system is designed for providing reliable electrical power to a facility and/or associated devices. The system includes one or more fuel cells and a circuit adapted to receive power from the one or more fuel cells. The circuit is electrically connected to a device receiving the electrical power from the system. Additionally, the system includes one or more capacitors included in the circuit, and being adapted for maintaining power in the circuit when the one or more fuel cells are temporarily unavailable.

Abstract: The invention relates to uninterruptible power supply devices which make it possible to supply emergency power to a load, which is to be supplied, in the event of mains failure. The invention is based on the object of providing a device for supplying uninterruptible power, which device can be operated in a more energy-saving manner and in which the emergency power can be controlled in a rapid and safe manner. To this end, the uninterruptible power supply device has a power transistor which can be rapidly switched and can be used to connect a standby power source to the output connections during emergency power operation. The output current can also be dynamically limited by driving the power transistor, which can be rapidly switched, in a corresponding manner. In addition, the input and output of the UPS device are decoupled using a field effect transistor that acts as a power transistor.

Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured to transfer energy non-radiatively with a second resonator structure over a distance greater than a characteristic size of the second resonator structure. The non-radiative energy transfer is mediated by a coupling of a resonant field evanescent tail of the first resonator structure and a resonant field evanescent tail of the second resonator structure.

Abstract: The invention relates to a high-frequency inductive coupling power transfer system with SP compensation in the primary and which is suitable both for series- and parallel-compensated secondaries, i.e. with a capacitor in series followed by a capacitor in parallel in the primary and a capacitor in series or a capacitor in parallel in the secondary.

Abstract: To provide a fast charge means for a capacitor in a negative bias generation circuit. A capacitor is present in a down converter in a negative bias generation circuit. In order to perform fast charge, the capacitance of the capacitor is reduced and a necessary amount of charge is minimized. On the other hand, an external capacitance provided separately from the capacitor in the down converter is coupled directly to a power supply voltage and charged. After the capacitor in the down converter is charged, the external capacitance and the capacitor in the down converter are coupled in parallel. Due to this, it is made possible to aim at both the increase in charge speed and the improvement of resistance to ripple noise.

Abstract: The present disclosure relates to an electronic regulation device of a variable capacitance of an integrated circuit having a time parameter depending on the variable capacitance. The regulation device includes a regulation loop, and is configured to generate in output a plurality of binary regulation signals.

Abstract: A multiple location load control system comprises a main device and remote devices, which do not require neutral connections, but allow for visual and audible feedback at the main device and the remote devices. The main device and the remote devices are adapted to be coupled in series electrical connection between an AC power source and an electrical load, and to be further coupled together via an accessory wiring. The remote devices can be wired on the line side and the load side of the load control system, such that the main device is wired “in the middle” of the load control system. The main device is operable to enable a charging path to allow the remote devices to charge power supplies through the accessory wiring during a first time period of a half-cycle of the AC power source. The main device and the remote devices are operable to communicate with each other via the accessory wiring during a second time period of the half-cycle.

Abstract: A low-EMI switched circuit comprises two or more switches, wherein impedance transitions of the switches are overlapped and the overlap is varied using variable switch timing based on an output power level of the switched circuit. The variable timing results in a variable impedance overlap between the switches. In one example, when one switch turns off (begins a low to high impedance transition) and a second switch turns on (begins a high to low impedance transition), a greater timing delay in beginning the second switch's transition results in a higher switch impedance overlap than a shorter delay does. If the variable timing is based on output power of the switched circuit, the variable delay can operate to reduce fly-back voltages at high power output levels and reduce shoot-through current at lower power levels, reducing EMI and quiescent current of the switched circuit.

Abstract: In a method for operating an electrical appliance such as a hob, the electrical appliance has a plurality of functional units, an operator control surface and a freely movable operator control element for mounting on the operator control surface, with a mounting point for the operator control element provided on the operator control surface for each functional unit. A sensor for a touch switch and a sensor for identifying the rotation of the operator control element are provided on the mounting point. The mounting of an operator control element on the mounting point is identified and evaluated as an activation indication of the associated functional unit. Subsequent rotation of the operator control element is identified and effects a change in the functional unit, with a functional state of the corresponding functional unit being maintained after the operator control element is removed from the mounting point.

Abstract: The invention relates to a wireless sensor device configured for sensing motion of an object in an area. The device comprises a motion sensor configured for generating a sensing signal when sensing motion in the area and a signal processor configured for processing the sensing signal. A power supply is provided for providing power to the motion sensor. Furthermore, the wireless sensor device comprises a controller configured for distinguishing, from the sensing signal, large object movements and small object movements of the object in the area. The wireless sensor device is configured to perform one or more power consumption reduction operations upon detection of large object movement. The power consumption reduction operations include temporarily disconnecting the motion sensor from the power supply and decreasing a duty cycle of the signal processor.

Abstract: A power controller for controlling a power supply having a predetermined voltage, generated based on a power supplied from an external power source and supplied to a signal processor, includes: a receiver configured to receive a signal for switching an ON/OFF state of the power supply from a remote controller, a controller configured to switch the ON/OFF state of the power supply depending on the signal received by the receiver, and a communication module configured to communicate with the signal processor that operates when the controller switches the power supply to be in an ON state, wherein the controller controls to make the communication module be non-operational when the power supply is in an OFF state and to make the communication module be operational when the power supply is in an ON state.

Abstract: An acceleration generator 20 includes: a moving member (21, 25) that performs a periodic translational motion along a particular straight line; a first operating part (24) that applies a first force that varies in magnitude depending on the relative position thereof with respect to the moving member to the moving member in a direction parallel to the particular straight line; and a second operating part (27) that applies a second force that varies in magnitude depending on the relative position thereof with respect to the moving member to the moving member in a direction parallel to the particular straight line. The moving member performs a translational motion in which the acceleration thereof in the positive direction and the acceleration thereof in the negative direction are asymmetric in one period.

Abstract: A vibration motor is disclosed. In accordance with an embodiment of the present invention, the vibration motor includes a cylinder-shaped coil unit, a vibrator, which is inserted into the coil unit and includes a magnet that forms an asymmetric magnetic field in a vibration direction, and an elastic body, which elastically supports the vibrator. Thus, the vibration motor can have a nonlinear characteristic, and thus a frequency bandwidth in which a resonance occurs can be expanded.

Abstract: A vibration motor is disclosed. In accordance with an embodiment of the present invention, the vibration motor includes a base, a vibrator, which reciprocates in the base, a protruding part, which is formed on at least one of the base and the vibrator, and an elastic body, which is interposed between the base and the vibrator and has a through-part formed therein and in which the protruding part is inserted into the through-part and the elastic body is coupled to the base or the vibrator by caulking or bending the protruding part which is protruded through the through-part. Thus, the vibration motor can have a uniform resonant frequency characteristic since a spring is coupled by way of caulking or bending.

Abstract: A fan motor is provided. The fan motor includes a case having a cylindrical bearing housing, and a base unit fixing the cylindrical bearing housing; a pair of bearings fitted into the cylindrical bearing housing; a stator which has a wound coil and a bottom portion to which a PC board including a motor driving circuit and a lead wire for supplying the motor driving circuit with electrical current is fixed; a shaft supported by the pair of bearings; a rotor which faces the stator and is fixed to the shaft, and which has a magnet; and an impeller which is fixed to an outer peripheral portion of the rotor, and has plural blades. The stator, the PC board and the lead wire are molded by epoxy resin which has hardness of Shore D85 to D95 after curing and a glass transition temperature of 125° C. or higher.

Abstract: A magnetic field interactive material being part of a machine component or mechanism utilizing magnetic or electro-magnetic field forces in said components operation and comprising specifically located magnetic particles incorporated into a non homogeneous amalgamation within the matrix or structural matrix of primarily a metal material differing from that of the magnetic particles therein forming an integrated component possessing magnetic field interactive capabilities, allowing such magnetic field interactive components to have a wide array of uses one of which is associated with Hybrid and Electric Vehicles.

Abstract: An electric motor with two or more stator sections, each possessing at least two salient pole projections having power windings, and two or more armature sections on a common shaft. The armature sections are at an angle to each other: e.g. 90 degrees for two armatures, 120 degrees for three armatures. Each armature has a lamination stack or ferrite core. The armature sections form a constant air gap with the field poles, and have an elliptical profile with respect to the output shaft. The armature sections have no electrical windings, or conductors and require no slip rings, rotor coils or permanent magnets. The power windings are energized by pulses of electric current. Said pulses are automatically supplied to the salient pole nearest the longest rotor flux path available, as determined by a shaft position sensor.

Abstract: An internal cooling structure for a motor, which is effective to remove the heat in the rotor to achieve high cooling effect is provided. The motor includes a stator having a stator coil and a stator core, and a rotor positioned on an inner side of the stator core. The rotor includes a tubular rotor spindle on a rotor drive shaft, and the rotor core is fitted to the rotor spindle. A cooling space is defined between the rotor drive shaft and the rotor spindle. An inner peripheral surface of the rotor spindle confronting the cooling space has tapered shape having large diameter at an end portion. An oil feed passage for a cooling oil is defined inside the rotor drive shaft, and a cooling oil discharge port of such oil feed passage is formed in the rotor drive shaft confronting the cooling space.

Abstract: A heat dissipating device of an electromotor is a composite cooling device driven in a powerless manner and used for stirring a cooling liquid applied on a surface of a casing of the electromotor. The heat dissipating device includes a pair of bearings fitted on the casing, and a roller disposed at outer ring seats of the pair of bearings. The roller has a sealed chamber therein, the chamber covers a surface of the casing located in a disposition region of the bearings, and at least one outer blade is disposed outside the roller. Thereby, composite heat dissipating of liquid cooling and air cooling of the electromotor is implemented with a cooling liquid injected into the chamber of the roller and a wind force applied on the outer blade.

Abstract: An electric motor assembly. A stator includes a set of windings and has a first end, a second end, and an outer radial surface. A rotor includes a shaft having an axis. A first frame supports the shaft at a first axial position. A canopy substantially surrounds the first frame. The canopy includes a fluid inlet and a fluid discharge. A second frame supports the shaft at a second axial position and includes at least one fluid outlet. A chute is positioned downstream of the canopy fluid discharge. The chute directs fluid flow along the outer radial surface of the stator towards the fluid outlet. A fan is coupled to the shaft downstream of the fluid outlet for rotation with the shaft.

Abstract: A lubrication system for an electrodynamic machine, for example an induction motor that has a housing including therein an internal oil sump and at least one oil ring hydrodynamic bearing, wherein the oil ring is in fluid communication with oil in the internal oil sump and replenishes oil in the bearing. The lubrication system functions independently and in parallel to the oil ring lubrication system and includes an electrically powered oil sump pump that is oriented within the internal oil sump. An oil intake is coupled to the oil sump pump and is in fluid communication with oil in the internal sump. An oil discharge line having a proximal end is coupled to the sump pump discharge. The distal end of the discharge line is oriented proximal the motor bearing, so that oil discharged therefrom replenishes oil in the bearing and shaft journal interface.

Abstract: An apparatus for animating a magnetically levitated object. The apparatus includes a display with an overhead housing. A magnetic levitation and oscillation assembly is included with an electromagnet in the overhead housing. A levitated object with a body in which a magnetic element is embedded is positioned proximate to the electromagnet and levitated within the display. The levitation and oscillation assembly includes a levitation actuator driving the electromagnet with a control signal to generate a levitating magnetic field. The assembly includes an oscillating signal generator that oscillates the levitating magnetic field at an oscillating frequency.

Abstract: A mechanical structure (16) for enabling a rotor (28) in a permanent magnet electric motor A to be moved axially relative to a stator (14) under an actuating force, without experiencing frictional sliding during such a movement. As the rotor (28) is moved away from the stator (14), the motor magnetic field is weakened, enabling the motor A to operate efficiently at elevated speeds, extending speed coverage under constant power.

Abstract: Provided is a synchronous motor including a rotor having magnetic poles distributed circumferentially along a rotation direction of the rotor at equal intervals, and a stator having stator teeth arranged circumferentially along the rotation direction of the rotor, each tooth wound with a stator coil by concentrated winding. Every M consecutive stator teeth belong to one of stator teeth groups arranged at equal intervals. The M consecutive stator teeth in each stator teeth group are arranged at intervals different from the intervals of the magnetic poles of the rotor. The stator coils wound around the M consecutive stator teeth are connected to separate terminals. A motor driver supplies currents of different phases to the stator coils via the respective terminals.

Abstract: To provide a well balanced squirrel-cage rotor for an electric motor, quantities of braze used to bond various rotor components are different from each other so as to serve as balance weight in order to improve balance.

Abstract: According to one embodiment, there is provided a rotating electrical machine including a core, a coil extending from the core, and an electromagnetic shield which is provided outside the core, and has a plurality of shoulders projecting toward the coil. The coil includes an insulator covering outside of a conductor, a resistance layer formed on a surface of the insulator and contacting the core, and at least one potential grading layer formed on a surface of the insulator adjacent to the resistance layer. A boundary between the resistance layer and potential grading layer is provided at a position farther from the core than a point on a surface of the coil, where a distance between the coil and a shoulder of the electromagnetic shield closest to the core is the shortest.

Abstract: Electrodymamic machine rotating mass, including for example induction motor rotors, stiffness tuning methods include selective orientation and compression of modular tie rod assemblies into through bores formed in the rotor lamination core outboard of the rotor shaft during motor manufacture, repair or refurbishment. Stiffness tuning enables a motor manufacturer to tune a rotor's rotordynamic stability, and hence the assembled motor's critical vibration speed. Electrodynamic machine rotating mass tuning can be adjusted in response to machine physical design, operational application and manufacturing variation attributes that impact the assembled machine's critical vibration frequency. Thus the present invention offers a systematic, holistic approach to motor vibration refinement through use of a simple kit of modular tie rod assemblies oriented and tightened in a selected array. Rotor stiffness tuning can be tested virtually on computer work stations.

Abstract: A stator for an electric machine has a circular stator body surrounding a rotor with an air gap therebetween. The stator has radially extending slots that define radially extending stator teeth. Multiple electric windings are located in the slots to define peripherally spaced magnetic poles. Separate coil groups establish multiple phases for the electric machine. Motor torque ripple is attenuated by forming the stator teeth with different widths for a given coil group.

Abstract: An ultrasonic probe has transmitting ultrasonic transducers and receiving ultrasonic transducers. The transmitting ultrasonic transducer is composed of a multilayer piezoelectric element, and the receiving ultrasonic transducer is composed of a single-layer piezoelectric element. The transmitting and receiving ultrasonic transducers are alternately arranged in an azimuth direction to form a piezoelectric element line. The single transmitting ultrasonic transducer and the single receiving ultrasonic transducer that adjoin to each other compose a single channel to transmit ultrasonic waves and receive echoes. The transmitting ultrasonic transducer is connected to a transmission circuit board on which a pulser is implemented, and the receiving ultrasonic transducer is connected to a reception circuit board on which an amplifier is implemented. The receiving ultrasonic transducer is directly connected to the amplifier without passing through a capacitance transmission line.