Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Reexamination Certificate
2006-05-23
2006-05-23
Duda, Rina (Department: 2837)
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
C318S600000, C318S604000, C318S254100
Reexamination Certificate
active
07049776
ABSTRACT:
An electric motor has a stator and an external rotor (40). Its external rotor (40) has a sensor magnet (54) having a plurality SP of sensor poles (55). The motor also has: at least one rotor position sensor (42, 44) for generating a rotor position signal and a rotor position evaluation arrangement for generating an absolute value for the rotor position, which apparatus comprises an A/D converter (144) having a resolution of at least two bits, the at least one rotor position sensor (42, 44) being connected to the A/D converter. In order to enable obtaining different digital values, even at rotational positions within the angle range of one sensor pole, each analog rotor position sensor signal is converted by the A/D converter into a digital value having at least two bits.
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Hornberger Jörg
Rappenecker Hermann
Rudel Christian
Schreiner Siegfried
Duda Rina
ebm-papst St. Georgen GmbH & Co. KG
Oliver, Esq. Milton
Ware Fressola Van Der Sluys & Adolphson LLP
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