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Method and circuit system for calibrating voltage and temperature deviations of the effective current of hydraulic valves in a pwm drive
Method and circuit system for calibrating voltage and temperature deviations of the effective current of hydraulic valves in a pwm drive
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机译:校准pwm驱动器中液压阀有效电流的电压和温度偏差的方法和电路系统
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摘要
The present invention relates to a method for reducing deviations between the effective current and the measured current in a pulse-width-modulated current control, in particular for electronic brake control units of motor vehicles, wherein the measured current is determined at a certain predefined time within an actuation period and a compensation occurs by means of temperature-responsive and/or supply-voltage-responsive compensation variables which are added to the measured current such that a corrected nominal current is available for current control. The invention also relates to a circuit arrangement for actuating several inductive loads and comprises a circuit for PWM control of the load current. The method of the invention is implemented as a program in a microcomputer or microcomputer system that is electrically connected to the PWM circuit.
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