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    • 9. 发明申请
    • ELECTRIC DRIVE SYSTEM
    • 电驱动系统
    • WO2014128433A2
    • 2014-08-28
    • PCT/GB2014050319
    • 2014-02-05
    • HARPER ADAMS UNIVERSITY
    • ALLAN DAVID GRANT
    • H02P5/695
    • H02P5/695B60L3/0046B60L3/04B60L3/106B60L15/2036B60L15/32B60L2200/26B60L2220/42B60L2240/12B60L2240/421B60L2240/423B60L2240/465B60L2240/545B60L2260/28H02K7/116H02K16/00H02P5/69Y02T10/641Y02T10/645Y02T10/648Y02T10/72Y02T10/7275
    • 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.
    • 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或两者都变化,使得aω1≠bω2,并且输出从ωout= 0驱动。结果 即使车辆处于休息状态,电动机仍然能够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(例如越野或其他困难的地形),或者移动 低速。