399 results about "Motor design" patented technology

The present invention is directed to an apparatus for driving an aircraft having an undercarriage wheel, comprising aircraft drive means for driving an undercarriage wheel, and a clutch disposed between said driven means and said wheel, wherein said drive means and said clutch are directly connected to the undercarriage apparatus. Said apparatus may have gears disposed between said drive means clutch, or between said clutch and said wheel. In a most preferred arrangement, the apparatus of the invention fits inside the hub of said wheel. When the invention is applied to an aircraft undercarriage wheel, the clutch allows the wheel to be disengaged for takeoff and landing.

A low profile speaker that is designed to substantially eliminate wobble of the bobbin and voice coil during operation with two different electromagnetic motor designs. In each design there is an added feature to of a downward extension of the outer edge of the cone that bottoms out on the bottom surface of the frame before the bottom edge of the bobbin strikes the bottom of the air gap thus preventing damage to the bobbin and voice coil when the voice coil is overdriven downward. Additionally, there are two different bobbin and voice coil cooling feature for use with electromagnetic motors that utilize a Tyoke construction.

The present disclosure provides a power split transmission with two Electric Variable Transmission (EVT) modes and four fixed gears for use in hybrid electrical vehicles (HEV). The present disclosure utilizes two electric motors (“E-motors”), an engine, three planetary gear sets, and four selectively engageable clutches. The clutches are engaged in different combinations to engage the different gears and EVT modes. In the four fixed gears, power is transmitted only on the mechanical path for the highest transmission efficiency. In the two EVT modes, a part of the power is transmitted electrically. Alternatively, the E-motors can be located in the middle integrated with the transmission design. Advantageously, the present invention works with lower component speeds than existing two-mode hybrid transmissions. This can be achieved with a front E-motor design enabling modularity and also with a center E-motor design.

A motor includes a stator and a rotor coupled via the center hub of the rotor. The stator includes a support ring, the support ring comprising a plurality of windings arranged circumferentially. The rotor is configured to operate as a rotating propeller and includes a center hub, a rotor support ring, and a plurality of blades. The rotor support ring comprises a plurality of magnetic poles arranged circumferentially. Each particular blade is individually coupled to the rotor support ring.

The invention discloses a solving method electromagnetic design used for a surface-mounted permanent magnet motor. The solving method comprises the following steps: (1) based on an improved subdomainmethod, establishing a vector magnetic potential expression of a permanent magnet, an air gap and a stator slot, and obtaining current magnetic field distribution of three subdomains according to thevector magnetic potential expression, wherein an equivalent current sheet is added into the stator slot as a boundary condition, the vector magnetic potential expression of the stator slot is relatedto the current density of the equivalent current sheet; (2) according to the obtained current magnetic field distribution, using a magnetic circuit method to solve and obtain the magnetic voltage dropof each part of a stator core, and converting the magnetic voltage drop into the current density of the equivalent current sheet inside the stator slot; (3) through mutual iteration of the improved subdomain method and the magnetic circuit method, solving the magnetic field distribution of the three subdomains; and (4) calculating permanent magnet motor magnetic flux linkage, counter electromotive force and cogging torque. By using the solving method, the magnetic field distribution of the motor and the electromagnetic performance of the motor under the condition that a saturation effect is considered can be calculated accurately, and optimal opinions are provided for motor design.

A bearingless and sealless rotary blood pump is disclosed which provides multidirectional flow intended to provide low-pressure, high-volume right-sided partial assist circulatory support in a univentricular Fontan circulation on a permanent basis. The pump includes a housing and an impeller suspended in the center of the housing. The housing incorporates flow optimization features between inlet and outlet ends, as well as with the impeller surface. Large fluid gaps maintained between impeller and housing eliminate any potential for blood flow obstruction. The impeller contains some motor components. It includes a central stator and surrounding rotor. The motor includes a brushless DC outrunner electrical motor design. An electromagnetic stator core is surrounded by a circumferential passive magnetic ring. The rotor is further levitated about the stator spindle by a plurality of axially and radially located passive magnetic and hydrodynamic journal bearings on both ends of the spindle. The rotor is bearingless and sealless. During impeller rotation, blood entering the space between the rotor and stator is induced to flow by centrifugal pumping action and the fluid film separates the stator hydrodynamic bearings from the rotor so that there is no direct mechanical contact between the rotor and stator.

Hybrid orbital fluid dynamic bearing motors are disclosed. The motors achieve improved efficiency advantages observed in fluid dynamic bearing motors containing an orbital ring. In addition, the hybrid orbital FDB motor has serial thrust bearings and traditional style journal bearings, which provide typically higher radial and angular stiffness not observed in previous orbital fluid dynamic bearing motor designs. Designs for centering orbital rings are also disclosed.

The invention relates to a motor optimization design method for a multi-objective particle swarm optimization algorithm based on a fuzzy expert system. The method performs motor optimization design by adopting the multi-objective particle swarm optimization algorithm based on the object distance, utilizes the fuzzy expert system to introduce expertise experiences for the motor design in and guide the particle swarm to move towards the optimum solution set and finally obtains the optimum solution set of the motor design. Since the invention utilizes the expertise experiences to guide the particle swarm to move towards the optimum solution set, the influence of the initial solution selected at random to the solving result is reduced, the precision and the speed of solution of the multi-objective particle swarm optimization algorithm are improved, and the development cycle is quickened.

The present invention is a compound planetary gear system which has a moveable sun gear and a lockable sun gear to change the gear ratio between a high gear ratio and a pseudo 1:1 slipping ratio. The system makes use of a ratchet and pawl mechanism to provide a safety backup for when the lockable sun gear is locked. The invention may be used to move the aircraft from a stationary position, for taxiing, and for pre-rotating the wheels prior to landing.

A method, apparatus, system and computer-readable medium for designing and/or simulating electrodynamic machinery are disclosed to, among other things, optimize one or more performance characteristics by manipulating structural and/or functional characteristics of the constituent components of an electrodynamic machine. According to the various embodiments, a motor designer can create a new motor design by modeling a rotor-stator structure to design and/or simulate electrodynamic machines that implement, for example, conically shaped magnets and accompanying field pole members.

The invention discloses a different-thickness-magnetic-pole-containing surface-pasting type permanent magnet motor magnetic field computing method and relates to the field of permanent magnet motor magnetic field computation. The method comprises the steps that a research region is divided into a permanent magnet region, an air gap region and a stator slot region; under a polar coordinate system, scalar quantity magnetic potential equations in the three regions are built; magnetic field boundary conditions of a rotor core-permanent magnet pole region, a permanent magnet pole-air gap region and an air gap-stator slot region are built; according to the scalar quantity magnetic potential equations and the magnetic field boundary conditions, a permanent magnet motor magnetic field distribution analytical model only containing a single group of uniform thickness poles is obtained; magnetic field computation results of all permanent magnet motors with single groups of uniform thickness poles are overlaid to obtain a magnetic field analytical expression of an actual permanent magnet motor with different-thickness magnetic poles. According to the method, the magnetic field distribution of the surface-pasting type permanent magnet motor containing the different-thickness magnetic poles is accurately calculated, an effective magnetic field magnetic field is provided for motor design and analysis, and a computation result can be further used for calculating other electromagnetic properties of the motor.

Systems and methods are disclosed for the remote design of an electric motor (e.g. an AC or DC motor) by a customer through an interactive Web-based process. A typical system includes a Web server capable of delivering an interactive web page to a remote system. The web page includes one or more input fields allowing a user to specify motion performance requirement values applied to a design algorithm. The user may specify only some of the possible performance values. The design algorithm generates electric motor design parameters which will achieve the desired performance values. The algorithm also performs a parametric search through an existing parts database for at least some existing components which can be used in the electric motor design. The electric motor performance data is presented as an output to the user.

The invention discloses a wheel hub motor optimization method based on the genetic annealing algorithm. The method includes the following technical steps that the target and constraint conditions of wheel hub motor optimization; the genetic annealing algorithm is adopted for inverse solution and solution of a wheel hub motor, and hub motor design variable parameter values are obtained; according to the obtained variable parameter values, the sustainedly stable torque of the wheel hub motor is generated. The genetic annealing algorithm is improved on the basis of the genetic algorithm, the genetic algorithm and the simulated annealing algorithm are organically combined together, the efficiency of the algorithm can be improved, the global control capability of the algorithm can be enhanced, the precision is high, the convergence speed is high and the efficiency is high. It is feasible to apply the method to the optimization design of the wheel hub motor of an electric wheel, and the method has wide engineering application value.

The invention discloses a systematic design method for an alternating current permanent magnet generator under the control of a PWM rectifier. The method mainly comprises two parts: a fundamental wave characteristic design and harmonic analysis and verification, wherein the fundamental wave characteristic design is mainly used to complete a motor parameter design and fundamental wave performance verification, and is combined with the control of the PWM rectifier based on a conventional permanent magnet generator design method; the harmonic analysis and verification is used to analyze the current harmonic wave content of a generator stator, the space harmonic wave of an electromagnetic field and the loss generated of the stator in a rotor under the condition of system control based on the existing motor design parameter and judges whether the design requirement is satisfied or not. The method disclosed by the invention inherits the advantages of magnetic circuit computation and parameter calculation analytical algorithms in the existing design method, creates a design method combining the fundamental wave characteristic design and harmonic analysis and verification and solves the critical problems of system, harmonic waves, rotor loss and the like in the permanent magnet generator design and the like which cannot be solved in the existing method.

The invention relates to a three-dimensional virtual brushless DC motor dynamic simulation method, belonging to the technical field of computer aided design (CAD). The method comprises the following steps: a, establishing a mechanism model for a brushless DC motor; b, establishing a three-dimensional virtual reality scene model for the brushless DC motor, i.e. establishing the three-dimensional model of each part and load of the brushless DC motor, and converting the three-dimensional models into 3ds files and outputting the 3ds files; c, realizing the virtual reality scene; and d, realizing the interaction of virtual simulated programs. When the three-dimensional brushless DC motor of the invention carries out an interaction operation, the visualization is good; and when the brushless DC motor carries out the interaction, the invention can lead the motor design to reach the optimum performance by amending the motor design and operating parameters in the interaction process, and can be used for testing the design performance of the brushless DC motor in advance.

An illumination system is provided to enable speed dome camera systems with a minimum of weight increase and existing motor designs to be used in conditions where the ambient illumination is insufficient for surveillance needs. A laser illumination system is divided and dispersed in the system, with its heavy components, namely the power supply, heat sinks, and laser beam generator mounted outside the speed dome and only a lightweight fibre optic cable output mounted adjacent to the speed dome camera. The key innovation in the present invention is having only a laser beam delivered over an optical slip joint rather than power for a laser, allowing for a higher speed of orientation of the camera. A pulsing system is used to avoid flashback within the speed dome.

The invention relates to a stator winding, in particular to a 14-pole and 252-slot asymmetric four-branch two-layer three-phase stator winding. Two layers, namely an upper layer and a lower layer, of wire rods embedded in stator slots are connected at the end parts by a straight end-to-end joint sleeve, an oblique end-to-end joint sleeve and a short copper ring for forming coils in three pitches,by changing winding pitches, and are regularly connected in series for forming four branches, , and the four branches are connected in parallel for forming the stator winding. According to the statorwinding disclosed by the invention, the new asymmetric four-branch two-layer three-phase stator winding which does not meet the condition of a symmetric winding is formed by changing the arrangement law and the connection form of the 14-pole and 252-slot winding. The stator winding disclosed by the invention can not only realize excellent performances of a motor, increase voltage grade, increase the number of the slots which can be selected by a stator of the 14-pole motor and greatly upgrade a motor design technology, but also reduce the axial length of the motor, reduce the height of a factory building and save the construction cost of a power station. The stator winding disclosed by the invention is suitable for 14-pole and 252-slot salient pole synchronous motors, in particular for the field of large-scale water-pumping energy storage motors.

The present invention discloses a brushed direct current motor compound control method design by a three-step approach, belongs to the technical field of motors, and aims to solve the problem of speedability and slow running instability in a speed control process of a direct current motor through a feedforward and feedback direct current motor designed by a three-step approach. The method comprises a step of establishing a mathematical model of a direct current brushed motor, and a step of speed regulation compound control of the feedforward and feedback direct current motor designed by the three-step approach. Internal and external operations are separated, the operation loads of a digital processor are reduced, the operation cost is saved, and the control performance is promoted.