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    • 44. 发明授权
    • Electric motor with permanent-magnet excitation
    • 永磁励磁电机
    • US5418414A
    • 1995-05-23
    • US218790
    • 1994-03-28
    • Bernd AckermannLeo HondsPing-Shih Wang
    • Bernd AckermannLeo HondsPing-Shih Wang
    • H02K1/27H02K15/03H02K21/16H02K21/22H02K21/12
    • H02K21/16H02K1/2786H02K15/03H02K21/22
    • The invention relates to an electric motor with permanent-magnet excitation, particularly inside-rotor and outside-rotor motors, comprising motor sections (10, 20) which are movable relative to one another, of which the first motor section (10) forms a multi-pole excitation field in an air gap (1) by means of permanent magnets (11) and of which the second motor section (20) is a soft-iron yoke (21) having pole teeth (22) which project towards the air gap (1) and which carry excitation coils (23). The motor combines the following characteristic features:a) the pole teeth (22) which project from the soft-iron yoke (21) of the second motor section (20) toward the air gap (1) are free from recesses at the location of the air gap (1),b) in the proximity of the air gap (1) the smallest distance between adjacent pole teeth (22) which project from the soft-iron yoke (21) of the second motor section (20) toward the air gap (1) is as small as is allowed by production,c) the transitional areas between areas with different directions of magnetisation of the permanent magnet (11) of the first motor section (10) extend parallel to the motor shaft, andd) the permanent magnet (11) of the first motor section (10) is magnetised in such a manner that the radial component of the magnetic field produced in the air gap (1) by this magnet varies approximately sinusoidally along the circumference of the motor.
    • 本发明涉及具有永磁激励的电动机,特别是内转子和外转子电动机,其包括可相对于彼此移动的电动机部分(10,20),其中第一电动机部分(10)形成 通过永磁体(11)在气隙(1)中的多极励磁场,并且其中第二电动机部分(20)是具有朝向空气突出的极齿(22)的软铁轭 间隙(1),并带有励磁线圈(23)。 电动机组合了以下特征:a)从第二电动机部分(20)的软铁轭(21)向空气间隙(1)突出的极齿(22)在 气隙(1),b)在气隙(1)附近,是从第二电动机部分(20)的软铁轭(21)突出的相邻极齿(22)之间的最小距离 空气间隙(1)与生产允许的一样小,c)第一马达部分(10)的永磁体(11)的不同磁化方向的区域之间的过渡区域平行于马达轴延伸,并且d ),使得该磁体在气隙(1)中产生的磁场的径向分量沿马达的圆周近似正弦变化地使第一马达部分(10)的永磁体(11)被磁化。
    • 50. 发明申请
    • DEVICE AND METHOD FOR CONTROLLING THE COLOR POINT OF AN LED LIGHT SOURCE
    • 用于控制LED光源的颜色点的装置和方法
    • US20110057571A1
    • 2011-03-10
    • US12990800
    • 2009-05-04
    • Bernd AckermannDirk HenteChristoph MartinyErik NieuwlandsGeorg SauerlaenderMatthias Wendt
    • Bernd AckermannDirk HenteChristoph MartinyErik NieuwlandsGeorg SauerlaenderMatthias Wendt
    • H05B37/02
    • H05B33/086B61L5/1881G09G3/3413G09G3/3426G09G2320/0242G09G2320/064G09G2320/0666G09G2360/147Y02B20/341
    • The present invention relates to a device and method for controlling the color point of an LED light source (50). Color point control is a most interesting product feature both for white and colored LED light sources. In known methods for the color control of RGB LED light sources use is made of flux and color sensors. However, there are difficulties with respect to sensing quickly changing ambient light, deeply dimmed colors, coordinating the measurements with the switching of the LEDs, and controlling the color in LED light units comprising a number of independent LED lamps, e.g. segmented wall washers and LCD backlights. It is proposed according to the present invention to control the color of the LED light source (50), using a model-based feed forward approach. Factors relating the parameters controlling the LED currents to the brightness for the different colors (and segments) are stored and used for open loop control. A slow-running procedure continuously measures and updates these factors. Whilst the measurements are e.g. synchronized with the PWM, the procedure itself can run considerably slower and updates the factors asynchronously.
    • 本发明涉及一种用于控制LED光源(50)的色点的装置和方法。 色点控制是白色和彩色LED光源的最有趣的产品功能。 在已知的用于RGB LED光源的颜色控制的方法中,使用通量和颜色传感器。 然而,在感测快速变化的环境光,深色调颜色,通过LED的切换协调测量以及控制包括多个独立的LED灯的LED光单元中的颜色方面存在困难,例如, 分段洗墙机和LCD背光源。 根据本发明提出了使用基于模型的前馈方法来控制LED光源(50)的颜色。 将控制LED电流的参数与不同颜色(和段)的亮度相关联的因素存储并用于开环控制。 一个缓慢运行的程序不断地测量和更新这些因素。 虽然测量是例如 与PWM同步,程序本身可以运行相当慢,并且异步更新这些因素。