Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2006-03-14
2006-03-14
Nguyen, Vinh P. (Department: 2829)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S11700H, C324S11700H, C324S126000
Reexamination Certificate
active
07012446
ABSTRACT:
A device for detecting a motor drive current is arranged without substantially requiring additional space. The device for detecting a motor drive current, detects the currents of the phases flowing through the feeder lines that connect the motors to an inverter using a first bus bar for each of the phases arranged in parallel relative to each other and second bus bars extending from the ends of the first bus bars in a direction to intersect the axes of the first bus bar to which attached, by using magnetic field detector elements of each of the phases arranged near the feeder lines, wherein processing means for detecting the currents relying on the magnetic field detector elements of each of the phases are provided on a common circuit board. The magnetic field detector elements are disposed near the first bus bars of each of the phases, and the circuit board is arranged in a space sandwiched between the outermost first bus bars. Thus, the circuit board is arranged without substantially requiring additional space, and the current detecting device is realized in a compact form.
REFERENCES:
patent: 5253156 (1993-10-01), Sakurai et al.
patent: 5589743 (1996-12-01), King
patent: 6775115 (2004-08-01), Sato
patent: A 9-304447 (1997-11-01), None
Agata Hiromichi
Taguchi Shin
Takenaka Masayuki
Aisin AW Co. Ltd.
Nguyen Vinh P.
Oliff & Berridg,e PLC
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