1317results about "Association for rectification" patented technology

An electric drive unit includes an electronic control and monitoring module integrally connected to an electric motor. The housing of the electric motor has a double-walled construction to form a water jacket with cooling water passages therein. The electronic module includes at least one high power component that requires cooling. This component is mounted directly on a cooling insert that extends through a recess in the electronic module housing and is inserted in an opening provided in the outer wall of the motor housing. In this manner, the cooling insert is integrated into the water jacket of the motor housing and is directly cooled by the cooling water flowing in the cooling passages. A very compact and reliable construction is achieved, in which the electric motor and the electronic module share a common water cooling circuit. External water hoses and external electrical connections between the electric motor and the electronic module are avoided.

An adaptive electric car or other vehicle with potentially better performance—power, efficiency, range—than a gasoline vehicle, at a competitive cost. The motor control system can dynamically adapt to the vehicle's operating conditions (starting, accelerating, turning, braking, cruising at high speeds) and other inputs and parameters. That consistently provides better performance. Isolating the vehicle's motor or generator electromagnetic circuits allows effective control of more independent parameters. That gives great freedom to optimize. Adaptive motors and generators for an electric vehicle are cheaper, smaller, lighter, more powerful, and more efficient than conventional designs. An electric vehicle with in-wheel adaptive motors delivers high power with low unsprung mass and high torque and power-density. Total energy management of the vehicles entire electrical system allows for large-scale optimization. An adaptive architecture improves performance of a wide variety of vehicles, particularly those that need optimal efficiency over a range of operating conditions.

An electric power steering apparatus can improve heat dissipation of a power board. A heat sink is mounted on the power board in surface contact therewith, on which power board there is mounted a bridge circuit including a plurality of semiconductor switching elements for switching an electric current supplied to an electric motor in accordance with torque assisting a steering wheel. The heat sink has a plurality of protrusions formed on a surface thereof at a side opposite to the power board.

A moving apparatus with a driving force assist mechanism traveled mainly by human power. This moving apparatus detects, in a non-contact manner, with respect to rotating portion such as traveling wheel, etc., rotation speed of the rotating portion to detect traveling state to deliver, from the driving force assist mechanism, assistant driving force corresponding to speed change information that a person who operates the moving apparatus intends to give on the basis of the detected traveling information to carry out traveling to thereby permit smooth traveling even in the case where traveling by only human power becomes difficult.

The invention discloses an electric drive fracturing semitrailer with dual engines and dual pumps. The electric drive fracturing semitrailer with the dual engines and the dual pumps comprises a semitrailer body, two plunger pumps, two radiators and an electrical control cabinet. The electric drive fracturing semitrailer with the dual engines and the dual pumps is characterized by further comprising two electromotorsand an inverter unit. The plunger pumps, the radiators, the electrical control cabinet, the electromotors and the inverter unit are integrated in the semitrailer body, the inverterunit is arranged on the gooseneck of the semitrailer body, the output end of the inverter unit individually drives the two electromotors, the other ends of the two electromotors are connected with theplunger pumps correspondingly, lubricating oil of the plunger pumps is cooled through the radiators, and local operation of the electric drive fracturing semitrailer with the dual engines and the dual pumps is realized through the electrical control cabinet. The electric drive fracturing semitrailer with the dual engine and the dual pump has the beneficial effects that the electromotors are adopted to drive the plunger pumps through a transmission shaft, the volume is small, and the economic efficiency, energy conservation and environment protection are achieved. The signal pump power of theplunder pumps is improved, design that the dual pumps are driven by the two electromotors is adopted by the whole fracturing device, the output power of the fracturing device is greatly improved, andthe using requirements are better met.

The invention discloses a power supply semi-trailer of electric drive fracturing equipment. The combination manner of a gas turbine engine, a power generator and a rectification unit is adopted, the power generator directly transmits the winding form and voltages needed by a rectification unit, conventional rectification transformer equipment is omitted, the rectification unit is connected with inversion units through common direct current buses, the common direct current buses can drive the multiple inversion units separately, and wiring of power supply circuits is reduced. The high-voltage inversion units are arranged on a gooseneck of the electric drive semi-trailer, and the space arrangement of the equipment is optimized. The whole power supply equipment is more compact in structure, small in occupied area and simple in wiring.

A compact and reliable structure of a multi-rotor synchronous machine which may be employed as a generator / motor for automotive vehicles is provided. The machine includes an outer rotor having permanent magnets, an inner rotor having permanent magnets disposed to be rotatable relative to the outer rotor, a stator core having armature coils interlinking with field magnetic fluxes produced by the outer and inner rotors, and a rotor-to-rotor relative rotation controlling mechanism. A relative angle between the outer and inner rotors is controlled within a given angular range by controlling the phase and quantity of current flowing through the armature coils to rotate the inner rotor relative to the outer rotor through the rotor-to-rotor relative rotation controlling mechanism, thereby changing the magnetic fluxes interlinking with the armature coils as needed.

Improved in-wheel, near-wheel and direct-drive electric motors for cars and other vehicles. This motor can be cheaper, lighter, more powerful, more efficient, and more reliable than other direct-drive motors. Its high torque-density and high performance allow it to produce the same peak power as heavier, bigger motors. That helps greatly with the handling issues caused by too much unsprung mass. The motor control system can adapt to the vehicle's operating conditions (like starting, accelerating, turning, braking, and cruising at high speeds). That provides better performance. The motor's low-voltage, low-current design helps reduce heat and weight and leads to lower motor cost. The motor can still operate with some faults, offering “get home” capability. It offers all the benefits of in-wheel motors: efficiency, compactness, direct traction control, quiet, simple driveline. And it adds to those benefits, while reducing or eliminating the drawbacks other in-wheel motors.

A dynamoelectric machine having a cooling system for removing heat uniformly about the machine. The machine includes a cooling jacket defining a flow path for liquid coolant which extends circumferentially of the machine and which reduces loss of coolant pressure. An endshield of the machine is configured for holding electronic components in arrangement integrated with the machine. The endshield has a flow passage for receiving the coolant to remove heat from the electronic components. The flow passage of the endshield and the flow path of the cooling jacket are serially arranged so that the coolant removes heat sequentially from the electronic components and a stator of the machine.

An apparatus for converting between mechanical and electrical energy, particularly suited for use as a compact high power alternator for automotive use and “remove and replace” retrofitting of existing vehicles. The apparatus comprises a rotor with permanent magnets, a stator with a winding, and a cooling system. Mechanisms to prevent the rotor magnets from clashing with the stator by minimizing rotor displacement, and absorbing unacceptable rotor displacement are disclosed. The cooling system directs coolant flow into thermal contact with at least one of the winding and magnets, and includes at least one passageway through the stator core. Various open and closed cooling systems are described. Cooling is facilitated by, for example, loosely wrapping the winding end turns, use of an asynchronous airflow source, and / or directing coolant through conduits extending through the stator into thermal contact with the windings.

A lightweight engine-driven generator set including a stator having at least first and second windings (preferably three-phase) and a rotor having a soft magnetic core and a plurality of high energy product permanent magnets, separated by consequence poles, disposed proximate the stator such that relative motion of the rotor and stator causes magnetic flux from the rotor to interact with and induce current in the stator windings. The first winding includes a predetermined number of turns corresponding to a first predetermined voltage output; and the second winding includes a predetermined number of turns corresponding to a second predetermined voltage output, the respective windings being grouped together as a unit and wound about the core such that the respective winding coils are wound in continuous close thermal contact with each other. The first winding generates a relatively high voltage, low amperage signal, and the second winding generates a relatively low voltage, high amperage signal; and a switch provides for selection of the desired output. Preferably the rotor is a hollow cylinder mounted on the engine shaft for rotation about the stator and such that the proper gap distance between rotor and stator is maintained during rotation of the rotor without bearings external to the engine. The low voltage, high amperage winding (or winding group) may be tapped to provide a selectable voltage output. Suitable rectifiers and inverters may be provided to effect selective DC and AC output signals.

A flat pack blower utilizes surface mounting techniques for mounting the blower electronics on a thin laminated circuit board to reduce the blower profile. To that end, the blower includes a stator, and a rotor rotatably coupled to the stator. The stator includes a coil, a pole coupled with the coil, and a laminated circuit board having blower control circuitry and pads for electrically connecting the blower control circuitry to the coil. Use of surface mounting techniques on the laminated circuit board thus eliminates the discrete electronic components and the wires connecting such components.

The present invention provides an axial rotary energy device which is arranged in a multi-phase electric current configuration. The device includes a rotor having a plurality of permanent magnet poles secured thereto and further includes a stator formed by stacking a plurality of printed circuit board working conductor layers together with a plurality of printed circuit board connecting layers. The stator having at least one working conductor layer for each phase of the electric current and at least one connecting conductor layer associated with one working conducting layer. The working conductor layer and the connecting conductor layer each having radial conductors extending from an inner diameter through-hole to an outer diameter through-hole. A plurality of via conductors are provided for electrically connecting selected ones of the radial connectors of the connecting conductor layer to selected ones of the radial connectors of the working conductor layers through the through-holes.

A method of assembling a power tool, a power tool, a method of assembling an electrical device, and an electrical device includes a switched reluctance motor. The electrical device is preferably a hand-held power tool, however, any type of electrical device that includes a switched reluctance motor may benefit from any number of aspects of the invention. In one independent aspect, the invention provides a construction that reduces tolerance stack-up. In another independent aspect, the invention provides a self-contained electronics package that plugs into a switched reluctance motor to provide control operation of the switched reluctance motor. In another independent aspect, the invention provides enhanced cooling that increases the efficiency of the electrical device using a switched reluctance motor. In another independent aspect, the invention provides an encapsulated magnet that allows for contaminant free motor control over the life of the SR motor. In another independent aspect, the invention provides an apparatus and a method for aligning magnets of a magnet hub with respect to the rotor poles the magnet poles represent.

An oil-cooled motor / generator for an automotive powertrain located outside of the transmission is provided, such as a BAS motor / generator. The motor / generator may have a stator, a rotor circumscribed by the stator, and a motor shaft on which the rotor is mounted for rotation. A housing assembly may surround the stator and the rotor, with a bearing positioned between the housing assembly and the motor shaft. A flow control member may at least partially circumscribe the rotor axially adjacent the stator. A bearing retainer may be positioned axially adjacent the bearing. A rotor end ring may be axially adjacent the rotor. The housing assembly may have an inlet configured to receive cooling oil. The housing assembly, the flow control member, the bearing retainer and the rotor end ring may be configured to distribute the cooling oil from the inlet to cool the stator, the rotor and the bearing.

A compact and lightweight electric generator for portable power applications employs a new engine design and integration approach for reducing engine, generator, and starter weight. A unique flywheel alternator / starter configuration that generates electrical power, rotates the engine for starting, provides inertia for smooth engine operation, pressurized air for cooling, and inertia for the alternator. An engine cowling provides rotating component protection, a fan shroud mechanism, cooling air ducts, and a cooling mechanism for handling large quantities of heat produced by rectified power conversion. An electrical hook up that allows the generator to provide transient surge capacity for starting inductive loads, or improved load leveling and fuel efficiency.

A brushless motor for a vehicle air conditioner has a motor holder having an accommodation portion, a stator having a center piece fastened to a bottom of the accommodation portion and a core on which a winding is wound, and an exciting circuit disposed below the bottom to supply an exciting current to the winding. A terminal of the exciting circuit is upwardly extended to an upper side of the core through a through hole formed in the bottom and a terminal accommodation hole formed in the center piece to be connected to the winding. Liquid having entered the accommodation portion is restricted from falling through the through hole of the bottom by an O-ring disposed to surround the through hole and is drained through a drain opening formed in the bottom. As a result, a connection portion between the terminal and the winding and the exciting circuit are restricted from making contact with liquid.

An electrical tool includes a housing having inlet (7) and outlet (8) openings, a brushless electric motor (2) and an inverted rectifier (3) both arranged in the housing (9) between inlet (7) and outlet (8) openings in an air stream (5) of an air volume (6), and a link condensator (10) located in the housing (9) in the air stream (5), with the inverted rectifier (3) being arranged, in the air flow direction, downstream of the link condensator (10) and upstream of the electric motor (2).

The stator core of a motor comprises an annular back core, and a plurality of tees created separately from the back core and secured onto the inner periphery of the back core. A stator coil is wound on each of the tees by a distributed or concentrated winding method. The stator core and stator coil are formed by molding.

A bus-bar integrated plate and outer frame section, arranged into a double-deck structure and having numerous bus bars molded with a resin molding plate portion, is provided as a wiring for connecting power switching elements and a smoothing capacitor, fixed on an outer surface of a cylindrical wall of a motor housing, to a printed circuit board serving as a control circuit.

A brushless motor comprising a housing; a drive shaft rotatably held by the housing; a stator disposed on said housing and having a plurality of coils which are arranged to surround the drive shaft; a yoke secured to the drive shaft to rotate therewith; a plurality of magnets that are held by the yoke in a manner to surround the stator keeping a given space therebetween; an electric parts protecting case on which the housing is mounted; a drive circuit installed in the case for energizing the coils of the stator, the drive circuit including a plurality of switching elements each changing the direction of electric current flowing in the corresponding coil of the stator; a control circuit installed in the case for controlling operation of the switching elements to adjust a rotation speed of the drive shaft; electric connectors for connecting the drive and control circuits; and a heat sink held by the case, the heat sink including a hidden portion exposed to an interior of the case and a plurality of heat radiation fins exposed to the outside of the case, the hidden portion having the switching elements attached thereto. The drive circuit and control circuit are arranged on respective substitutes which are arranged at different positions in the electric parts protecting case. The drive and control circuits are connected through electric connectors.

A brushless generator with permanent-magnet multi-pole rotor disks and coreless stator winding disks includes integral electronics to efficiently generate regulated DC current and voltage from shaft input power over a broad speed range. Its power rating is scalable, and it incurs no cogging torque, or friction from gearing. Integral power control electronics includes high-frequency pulse-width-modulated boost regulation, which provides regulated current at requisite voltage over its broad speed range. A main embodiment to produce DC power at widely variable speeds includes signal processing so output power varies according to the third power of speed. A version for use with vertical-axis wind turbines has a relatively large diameter to facilitate a large number of poles. Combined boost-regulation, zero cogging torque, and no gearing, enable a wide speed range, for better power quality and higher wind energy yields. An alternate embodiment is intended to produce DC power from a variety of shaft drive sources, with selectable shaft torque.

An electric motor system and method are shown having a circuit board arranged in a plane that lies in a predetermined angle relative to an axis to an armature of the electric motor. In one embodiment the predetermined angle is an acute angle and the plane is not perpendicular to an axis of an armature of the motor 10. Brushes are located remotely from the board.

In an electric motor which includes an electronic control device and an armature within a closed motor casing, the electronic control device is arranged within the casing, in a position offset axially from but close to the armature. The motor includes a thermal screen which is interposed axially between the armature and the control device, and the screen includes means for dissipating heat outside the casing.

Featured is a controller for a motor that is ultra-compact, with a power density of at least about 20 watts per cubic cm (W / cm3). The controller utilizes a common ground for power circuitry, which energizes the windings of the motor, and the signal circuitry, which controls this energization responsive to signals from one or more sensors. Also, the ground is held at a stable potential without galvanic isolation. The circuits, their components and connectors are sized and located to minimize their inductance and heat is dissipated by conduction to the controller's exterior such as by a thermally conductive and electrically insulating material (e.g., potable epoxy). The controller uses a single current sensor for plural windings and preferably a single heat sensor within the controller. The body of the controller can also function as the sole plug connector.

In a drive train for a motor vehicle, with a converter bell arranged between an internal combustion engine and a transmission, and a drive shaft extending through the converter bell and carrying a clutch device and an electric machine together with a power converter, which comprises at least one capacitor and power electronics which are integrated into the converter bell, the capacitor and the power electronics are arranged between a stator of the electric machine and the converter bell such that they are distributed around the outer circumference of the electric machine in the radial direction and the capacitor and the power electronics are arranged such that they are in thermally conductive contact with the cooling system for the stator of the electric machine.

A drive unit comprises an electric motor, a drive unit casing 2 accommodating therein the electric motor, an inverter 3 that controls the electric motor, and a flow passage of a refrigerant that cools the inverter. The inverter defines a space R between it and a heat sink 5 integral with a substrate of the inverter, and is mounted to the drive unit casing, the space being communicated to the flow passage of the refrigerant. The heat sink comprises fins 56 that cross the space R, and abuts against the drive unit casing in a state of low thermal conduction. Thereby, the heat sink is effectively cooled by heat exchange with a cooling refrigerant in wide areas. Also, the fins contact with the drive unit casing in a state of low thermal conduction via a heat insulation material, etc., whereby direct heat conduction is avoided and efficient cooling is enabled while temperature gradient conformed to heat-resistant temperatures of the inverter and the electric motor is maintained.