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US08576581B2 Circuit for controlling the current in an electrical control member or the voltage across the terminals of said electrical control member 失效
用于控制电气控制构件中的电流的电路或所述电气控制构件的端子两端的电压

Circuit for controlling the current in an electrical control member or the voltage across the terminals of said electrical control member
Abstract:
The present invention relates to a circuit (300) for controlling the current in an electrical control member (110) comprising a bridge provided with four terminals (105, 106, 107, 108) and comprising four control switches (AH, AL, BH, BL), a power source (109), PWM control means for at least two of the four switches. The control circuit exhibits a first state in which said first (AH) and fourth (BL) switches are closed and said second (BH) and third (AL) switches are open, a second state in which said second (BH) and third (AL) switches are closed and said first (AH) and fourth (BL) switches are open and at least one of the following two states: a third state in which said third (AL) and fourth (BL) switches are closed and said first (AH) and second (BH) switches are open and/or a fourth state in which said first (AH) and second (BH) switches are closed and said third (AL) and fourth (BL) switches are open. A particularly interesting application of the invention lies in the field of controlling the current for the actuators used for “camless” systems in motor vehicles.
Abstract(Chinese):

本发明涉及一种用于控制电气控制构件（110）中的电流的电路（300），其包括设置有四个端子（105,106,107,108）的桥，并且包括四个控制开关（AH，AL，BH， BL），电源（109），用于四个开关中的至少两个的PWM控制装置。 所述控制电路呈现第一状态，其中所述第一（AH）和第四（BL）开关闭合，并且所述第二（BH）和第三（AL）开关断开，第二状态，其中所述第二（BH）和第三 AL）开关闭合，并且所述第一（AH）和第四（BL）开关断开，并且处于以下两种状态中的至少一种状态：第三状态，其中所述第三（AL）和第四（BL）开关闭合，并且所述第一 （AH）和第二（BH）开关是断开和/或第四状态，其中所述第一（AH）和第二（BH）开关闭合，并且所述第三（AL）和第四（BL）开关断开。 本发明的特别有趣的应用在于控制用于机动车辆中的“无凸轮”系统的致动器的电流的领域。

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