Digital control electronic having a pulse width modulated (PWM)-output signal for the control of electric control elements of a hydraulic system
AssigneeMannesmann Rexroth GmbH
InventorHeinrich Nikolaus
Life of this patent
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Abstract
A digital electronic control apparatus for controlling at least one electronic control element comprises. The apparatus comprises first and second pulse width modulated output signal generators, the frequency of the second signal being different from the first. The second pulse width modulated signal is provided as a function of a digital value determined by at least one of a characteristic and operating condition of the at least one electronic control element. An AND-gate receives the first and second pulse width modulated signals and is capable of producing an output signal for controlling the at least one electronic control element a first and second pulse width modulated signal having a first frequency.
Claims10
A digital electronic control apparatus for controlling at least one electronic control element comprising:
- means for generating a first pulse width modulated signal having a first frequency;
- means for generating a second pulse width modulated signal having a second frequency different from said first frequency, said second pulse width modulated signal being a function of a digital value determined by at least one of a characteristic and an operating condition of said at least one electronic control element;
- and
- a combining gate for receiving said first and second pulse width modulated signals and combining them to produce an output signal for controlling said at least one electronic control element.
Dependencies are inferred from the claim text.