Electricity: motive power systems – Positional servo systems – Pulse-width modulated power input to motor
Reexamination Certificate
2005-11-22
2005-11-22
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Positional servo systems
Pulse-width modulated power input to motor
C318S600000, C318S601000, C318S603000, C318S604000
Reexamination Certificate
active
06967459
ABSTRACT:
The invention concerns a method of regulating the current in a direct current machine with which are associated an arrangement for generating a current target value signal, as well as a PWM generator (FIG.11: 182) whose output signal (PWM2) is controllable by means of a control signal (u—156) and controls the current in the direct current machine, having the following steps: a) the pulse duty factor of the PWM generator is controlled with the control signal (u—156); b) with the output signal (PWM2) of the PWM generator, the current in the direct current machine is controlled in such a way that a pulsed direct current (i—2; i—2′) is obtained in a supply lead thereof; c) a pulsed current-dependent signal (u—2) is derived from this pulsed direct current (i—2; i—2′) and is compared to the current target value signal (PHI1); d) as a function of the result of that comparison, the control signal (u—156) for controlling the PWM generator (182) is modified in such a way that the current in the direct current machine is regulated to the desired target value.
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Hahn Alexander
Rappenecker Hermann
ebm-papst St. Georgen GmbH & Co. KG
Leykin Rita
Oliver, Esq. Milton
Ware Fressola Van Der Sluys & Adolphson LLP
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