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    • 52. 发明授权
    • Method of changing speeds in a multi-polar electric motor of the
constant flux type, and a motorized fan unit with change of speed
controlled by such a method
    • 恒定通量型的多极电动机的变速方法以及通过这种方法控制的速度变化的电动风扇单元
    • US5311615A
    • 1994-05-10
    • US766811
    • 1991-09-26
    • Herve Couetoux
    • Herve Couetoux
    • H02K23/20H02P7/285
    • H02P7/285H02K23/20Y10S388/934
    • The invention provides a method of commutation control, for changing the speed of a direct current electric motor of the constant flux type, having an encapsulated inductive winding with n poles, each of which is supplied by a separate brush. In this method, a speed at a level i, where i is in the range 1 to n-1 inclusive, is obtained by connecting a group of i+1 brushes to the terminal of the direct current supply source. The state of connection of the brushes is modified in accordance with a control characteristic which comprises modifying the composition of the group of i+1 brushes to be connected in order to obtain a motor speed at a predetermined level i, and/or by interrupting the connection of one of two consecutive brushes to the brush previously connected during a speed changing operation.
    • 本发明提供了一种用于改变恒流通型的直流电动机的速度的换向控制方法,该方法具有一个具有n个磁极的封装的感应绕组,每个磁极由独立的电刷提供。 在该方法中,通过将一组i + 1个电刷连接到直流电源的端子来获得I级(其中i在1到n-1的范围内)的速度。 电刷的连接状态根据控制特性进行修改,该控制特性包括修改要连接的i + 1个电刷组的组成,以获得在预定电平i的电动机速度,和/或通过中断 将两个连续的刷子中的一个连接到在变速操作期间预先连接的刷子。
    • 54. 发明授权
    • Connecting tube for a heat exchanger fluid header, and a fluid header
having such a connecting tube
    • 用于热交换器流体集管的连接管和具有这种连接管的流体集管
    • US5275236A
    • 1994-01-04
    • US14616
    • 1993-02-08
    • Philippe Le Gauyer
    • Philippe Le Gauyer
    • F28F9/26B21D39/06F28F9/04F28F9/02
    • B21D39/06F28F9/0246
    • A connecting tube for a fluid header of a heat exchanger, especially a tubular header for a condenser of an air conditioning installation for a motor vehicle, comprises a cylindrical tubular body delimited by a metallic wall and extended by a flattened tubular end portion formed by deformation of the wall and arranged to be fitted into an oblong aperture formed in a metallic wall of the fluid header. The connecting tube has at least one shear cut, formed in the thickness of the wall and extending over part of the periphery of the connecting tube in a region lying between the body and the flattened end portion. The shear cut defines a frontal lip which bears against the wall of the fluid header after the flattened end portion has been fitted in the latter.
    • 用于热交换器的流体集管的连接管,特别是用于机动车辆的空调设备的冷凝器的管状集管,包括由金属壁限定并由变形形成的扁平的管状端部部分延伸的圆柱形管状体 并且被布置成装配到形成在流体集管的金属壁中的长方形孔中。 连接管具有至少一个剪切切口,其形成在壁的厚度上,并且在位于主体和平坦化端部之间的区域中在连接管的周边的一部分上延伸。 剪切切口限定了在平坦的端部已经装配在后者中之后承载在流体集管的壁上的正面唇缘。