The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2024
Filed:
Sep. 05, 2022
Maxim Integrated Products, Inc., San Jose, CA (US);
Bernhard Dwersteg, Rellingen, DE;
MAXIM INTEGRATED PRODUCTS, INC., San Jose, CA (US);
Abstract
A method and a circuit arrangement for damping stepper motor resonances during operation of a stepper motor (M), in particular in the medium und high speed range, is described, wherein the coils (A; B) of the stepper motor (M) are each connected into a bridge circuit (Br; Br) comprising semiconductor switches (Sw, . . . Sw), in order to impress into the coils (A; B) a predetermined target coil current (I; I). The resonance damping is essentially achieved by activating a passive FD-phase in the zero crossing of the target coil current (I; I), during which all 10 semiconductor switches (Sw, . . . Sw) are opened or switched blocking, in order to thereby feed a coil current flowing in the related motor coil (A; B) back into the supply voltage source either via inverse or body diodes and/or via diodes (D, . . . D) connected in parallel to the semiconductor switches (Sw, . . . Sw) in the reverse direction between the positive supply voltage (+V) and ground potential.