Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1994-04-25
1995-10-10
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324713, 324704, 324546, 324715, 324545, G01R 2714
Patent
active
054574021
ABSTRACT:
A method and apparatus for determining the resistance of the coils and commutator connections in an armature of an electric motor wherein a current is generated between a first commutator segment and a commutator segment located at least three segments beyond said first segment, a first voltage is measured across the first commutator segment and an adjacent second commutator segment, a second voltage is measured across the second commutator segment and an adjacent third commutator segment, and a third voltage is measured across a pair of commutator segments which are adjacent to the first commutator segment. After the three voltages are measured, the current is disconnected, and a voltage is generated across two commutator segments spaced at least three segments beyond the first segment. The generated voltage is adjusted so that the voltage measured across the second and third commutator segments equals the previous measurement, and the voltages are remeasured. With the voltages measured across the second and third commutator segments being equal, the connection and coil resistances for the first commutator segment are calculated from the voltage measurements and the value of the generated current. The armature is then indexed, and the measurements repeated, to determine the coil and connection resistance of subsequent segments.
REFERENCES:
patent: 2463567 (1949-03-01), Samstag
patent: 4053830 (1977-10-01), Porter
patent: 4651086 (1987-03-01), Domenichini et al.
patent: 5140276 (1992-07-01), Fisher
patent: 5307019 (1994-04-01), Robey
Odawara Engineering Co., Ltd.
Wardas Mark
Wieder Kenneth A.
LandOfFree
Armature resistance measuring apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Armature resistance measuring apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Armature resistance measuring apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2312761