Patent ID: 11929742
Assignee: VITESCO TECHNOLOGIES GERMANY GMBH
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A control device for switching an electronic component on or off under the control of a pulse-width-modulation signal, the electronic component being configured to output an output signal controlled by way of a control signal, the control device comprising:
at least one oscillation detector for calculating an amplitude magnitude;
a control unit for determining switchover instants and generating the control signal;
a signal generator for controlling the electronic component in accordance with the control signal;
a first closed-loop control circuit for controlling a first switchover instant and the control signal on a basis of an amplitude magnitude;
a second closed-loop control circuit for controlling a second switchover instant and the control signal on a basis of an amplitude magnitude;
said first closed-loop control circuit including said at least one oscillation detector for calculating the amplitude magnitude, a first closed-loop controller for forming a first correction value, which is a measure for a deviation of the amplitude magnitude from an amplitude limit, and a first output unit configured to determine said first switchover instant of each pulse-width-modulation clock period on the basis of the first correction value and having an output changing at said first switchover instant to generate the control signal;
said second closed-loop control circuit including said at least one oscillation detector for calculating the amplitude magnitude, a second closed-loop controller for forming a second correction value, which is a measure for a deviation of the amplitude magnitude from an amplitude limit, and a second output unit configured to determine said second switchover instant of each pulse-width-modulation clock period on the basis of the second correction value and having an output changing at said second switchover instant to generate the control signal; and
the control device being configured for:
initiating the switching on or off within a pulse-width-modulation clock period at a level-change instant by a change in the pulse-width-modulation signal;
calculating at least one amplitude magnitude of an oscillation of the output signal during each clock period of the pulse-width-modulation signal;
predefining at least one first control value and one second control value of the control signal;
in order to perform the switching on when the switching on has been initiated or in order to perform the switching off when the switching off has been initiated, adjusting the control signal to the first control value within each pulse-width-modulation clock period between the level-change instant and said first switchover instant and adjusting the control signal to the second control value between said first switchover instant and said second switchover instant and adjusting the control signal to a third control value from said second switchover instant until a gate voltage end value of a gate voltage is reached at a control connection of the electronic component, wherein the gate voltage end value is selected to turn on the electronic component when the switching on has been initiated or the gate voltage end value is selected to turn off the electronic component when the switching off has been initiated; and
determining each of said first and second switchover instants of a pulse-width-modulation clock period on a basis of an amplitude magnitude associated with the pulse-width-modulation clock period and calculated during a preceding pulse-width-modulation clock period, to thereby limit oscillation amplitudes of an oscillation of the output signal.