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    ELECTRIC DRIVE SYSTEM
    1.
    发明申请
    ELECTRIC DRIVE SYSTEM 有权
    电驱动系统

    公开(公告)号：US20160006378A1

    公开(公告)日：2016-01-07

    申请号：US14769535

    申请日：2014-02-05

    申请人： HARPER ADAMS UNIVERSITY

    发明人： David Grant ALLAN

    IPC分类号： H02P5/695 ,  B60L15/32

    CPC分类号： H02P5/695 ,  B60L3/0046 ,  B60L3/04 ,  B60L3/106 ,  B60L15/2036 ,  B60L15/32 ,  B60L2200/26 ,  B60L2220/42 ,  B60L2240/12 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2240/465 ,  B60L2240/545 ,  B60L2260/28 ,  H02K7/116 ,  H02K16/00 ,  H02P5/69 ,  Y02T10/641 ,  Y02T10/645 ,  Y02T10/646 ,  Y02T10/72 ,  Y02T10/7275

    摘要： This invention concerns an electric drive system (200) for driving an output. The electric drive system comprises: a first electric motor (250) arranged to drive a first input shaft (230) at a first angular velocity, ω1, and a second electric motor (260) arranged to drive a second input shaft (240) at a second angular velocity, ω2. A gear mechanism (210) is provided and is arranged to transmit angular rotation of the first (230) and second (240) input shafts to drive the output (220) at an output angular velocity, ωout, such that ωout is proportional to aω1-bω2, where a and b are constants. The electric drive system (200) further comprises a controller (270) arranged to control operation of the first (250) and second (260) electric motors. When the output (220) is to be driven from ωout=0, the controller (270) is arranged to control the first (250) and second (260) electric motors to drive the first (230) and second (240) input shafts. The input shafts are driven in a first phase to primary first and second angular velocities, ω1,p and ω2,p, such that aω1,p≈bω2,p. The input shafts are also subsequently driven in a second phase in which the first angular velocity, ω1, or the second angular velocity, ω2, or both are varied such that aω 1≠bω2 and the output is driven from ωout=0. The result of this is that the motors run in a more efficient part of their output profile, even whilst the vehicle is at rest, pulling off (especially in situations of high output load such as on off-road or otherwise difficult terrain), or moving at low velocity.

    摘要翻译： 本发明涉及用于驱动输出的电驱动系统（200）。 电驱动系统包括：布置成以第一角速度ω1驱动第一输入轴（230）的第一电动机（250）和布置成驱动第二输入轴（240）的第二电动机（260） 第二个角速度ω2。 齿轮机构（210）被设置成传递第一（230）和第二（240）输入轴的角度旋转以驱动输出（220）以输出角速度ωout，使得ωout与aω1成比例 -bω2，其中a和b是常数。 电驱动系统（200）还包括控制器（270），其被布置成控制第一（250）和第二（260）个电动机的操作。 当输出（220）要从ωout= 0驱动时，控制器（270）被布置成控制第一（250）和第二（260）个电动机来驱动第一（230）和第二（240）输入轴 。 输入轴在第一相中被驱动到初级第一和第二角速度ω1，p和ω2，p，使得aω1，p≈bω2，p。 输入轴也随后在第二相中驱动，其中第一角速度ω1或第二角速度ω2或二者都变化，使得aω1≠bω2，并且输出从ωout= 0驱动。 这样做的结果是，即使车辆处于静止状态，电动机也可以在其输出轮廓的更有效的部分运行，特别是在高输出负载的情况下，例如在越野或其他困难的地形上），或 以低速移动。

    Throttle valve for use in a gas turbine engine fuel control system
    2.
    发明授权
    Throttle valve for use in a gas turbine engine fuel control system 失效
    节气门用于燃气轮机发动机燃油控制系统

    公开(公告)号：US4154425A

    公开(公告)日：1979-05-15

    申请号：US658533

    申请日：1976-02-17

    申请人： Trevor S. Smith

    发明人： Trevor S. Smith

    IPC分类号： F16K31/53 ,  H02P5/695 ,  F16K31/04

    CPC分类号： H02P5/695 ,  F16K31/535 ,  Y10T74/19014 ,  Y10T74/19051 ,  Y10T74/19056

    摘要： A throttle valve has a control member which is angularly positioned by two stepper motors which drive the control member through differential gearing. The drives to the control member are arranged so that a single step displacement of the respective motors in the same direction drives the control member by different amounts in opposite directions, providing a high resolution drive. The control member may be driven at a high speed by reversing one of the motors.

    摘要翻译： 节流阀具有控制构件，其通过两个步进电机成角度地定位，所述两个步进电动机通过差速齿轮驱动控制构件。 控制构件的驱动器被布置成使得相同方向上的各个电动机的单步位移沿相反方向驱动控制构件的不同量，从而提供高分辨率驱动。 可以通过反转一个电动机来高速地驱动控制构件。

    Direct current motor combinations for electric vehicles
    7.
    发明授权
    Direct current motor combinations for electric vehicles 有权

    公开(公告)号：US11121650B2

    公开(公告)日：2021-09-14

    申请号：US16686195

    申请日：2019-11-17

    申请人： Michael L Froelich

    发明人： Michael L Froelich

    IPC分类号： H02P5/69 ,  B60K1/04 ,  H02K7/116 ,  H02P5/695

    摘要： A vehicular propulsion system is described that uses a plurality of direct current (DC) motors operatively attached to a common drive shaft or shafts of an electric vehicle (EV) or boat. Each motor is powered separately by direct current from a battery cassette or trays swappably inserted into the chassis of the vehicle. The battery cassettes are secured in racks, with one or more individual battery cassettes connected to each of individual motors. The individual battery cassettes are sized to have a weight suitable so as to be readily swapped out as needed for recharging, maintenance or replacement, enabling vehicle range to be extended en route by exchanging depleted battery cassettes for new batteries whenever needed. DC motors may be selected to obtain efficiencies greater than obtainable with AC motors, but require no expensive inverter unit.

    Direct Current Motor Combinations for Electric Vehicles
    8.
    发明申请
    Direct Current Motor Combinations for Electric Vehicles 有权

    公开(公告)号：US20210152105A1

    公开(公告)日：2021-05-20

    申请号：US16686195

    申请日：2019-11-17

    申请人： Michael L Froelich

    发明人： Michael L Froelich

    IPC分类号： H02P5/695 ,  H02K7/116 ,  B60K1/04

    摘要： A vehicular propulsion system is described that uses a plurality of direct current (DC) motors operatively attached to a common drive shaft or shafts of an electric vehicle (EV) or boat. Each motor is powered separately by direct current from a battery cassette or trays swappably inserted into the chassis of the vehicle. The battery cassettes are secured in racks, with one or more individual battery cassettes connected to each of individual motors. The individual battery cassettes are sized to have a weight suitable so as to be readily swapped out as needed for recharging, maintenance or replacement, enabling vehicle range to be extended en route by exchanging depleted battery cassettes for new batteries whenever needed. Air cooling is enabled by use of the smaller battery cassettes and smaller motor assemblies. The torque of the smaller motors, operating on a common drive shaft, is additive according to a first embodiment in which a set of like motors are supplied. Variable ratio gearboxes are provided in the drivetrain so that motors can be directly coupled to the driven axle. By dividing the batteries among the motor loads and by combining the torques of several smaller motors at the drive shaft, improved range, serviceability and decreased cost are achieved. According to a second embodiment in which a set of unlike motors are supplied, unlike motors having torque curves optimized for different propulsion states are combined so as to improve mileage in a range of real world mixed driving conditions. Series-wound DC motors may be used in combination with brushless direct current (BLDC) motors (operated with Hall-effect positional feedback, encoders, resolvers, H-bridge MOSFETs, field-oriented control or pulse width modulation), shunt-excited motors, or compound-excited DC motors. With both like and unlike DC motors, magnetic coupling of surface, radial or embedded permanent magnets (PM) may be selected to obtain efficiencies greater than obtainable with AC motors, but require no expensive inverter unit.