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US 6,784,649 B1Granted
Switch controller
AssigneeRobert Bosch GmbH
InventorFranz Ohms
Life of this patent
Estimating the term…
Abstract
In a switching controller whose error signal amplifier essentially exhibits P action, the load step performance of the switching controller is detected via an evaluation circuit. This signal is fed directly to the pulse-duration or pulse-frequency modulator for the final controlling element, substantially circumventing the error signal amplifier for the switching controller. Through this measure, output capacities of the switching controller can be reduced without stability problems.
Claims8
A switching controller, comprising:
- a final controlling element;
- a pulse-duration or pulse-frequency modulator coupled to the final controlling element, the pulse-duration or pulse-frequency modulator controlling the final controlling element;
- an error signal amplifier coupled to the pulse-duration or pulse-frequency modulator, the error signal amplifier exhibiting P action and acting on the pulse-duration or pulse-frequency modulator;
- an evaluation circuit to detect a load performance of the switching controller, the evaluation circuit configured to detect only an alternating component of a load-step dependent signal of the switching controller, a time constant of the evaluation circuit being set so that the error signal amplifier compensates for a decaying control deviation of the signal detected by the evaluation circuit, the signal detected by the evaluation circuit being provided as a pre-control signal for the pulse-duration or pulse-frequency modulator;
- and
- a coupling device for the signal detected by the evaluation circuit, the coupling device provided between an output of the error signal amplifier and an input of the pulse-duration or pulse-frequency modulator.
3 more elements
Dependencies are inferred from the claim text.