Searching over 5,500,000 cases.


searching
Buy This Entire Record For $7.95

Download the entire decision to receive the complete text, official citation,
docket number, dissents and concurrences, and footnotes for this case.

Learn more about what you receive with purchase of this case.

Nidec Motor Corp. v. Zhongshan Broad Ocean Motor Co. Ltd.

United States Court of Appeals, Federal Circuit

March 14, 2017

NIDEC MOTOR CORPORATION, Appellant
v.
ZHONGSHAN BROAD OCEAN MOTOR CO. LTD, BROAD OCEAN MOTOR LLC, BROAD OCEAN TECHNOLOGIES LLC, Appellees

         Appeal from the United States Patent and Trademark Office, Patent Trial and Appeal Board in No. IPR2014-01122.

          Scott R. Brown, Hovey Williams LLP, Overland Park, KS, argued for appellant. Also represented by Matthew B. Walters.

          Steven F. Meyer, Locke Lord LLP, New York, NY, argued for appellees. Also represented by JOSEPH Anthony Farco; Charles Baker, Houston, TX.

          Before LOURIE, MOORE, and TARANTO, Circuit Judges.

          Moore, Circuit Judge.

         The present appeal arises from an inter partes review ("IPR") involving Zhongshan Broad Ocean Motor Co. Ltd., Broad Ocean Motor LLC, and Broad Ocean Technologies, LLC (collectively "Broad Ocean") and Nidec Motor Corp. ("Nidec"). Broad Ocean petitioned for IPR of claim 21 of Nidec's U.S. Patent No. 7, 208, 895 (the "'895 patent"). The Patent Trial and Appeal Board (the "Board") instituted the IPR and found that claim 21 was anticipated by U.S. Patent No. 5, 569, 995 ("Kusaka"). Nidec appeals that decision to our court. Because the Board's decision is not supported by substantial evidence, we reverse.

         Background

         The '895 patent discloses a system for controlling the torque of an electromagnetic motor. Figure 1 illustrates its basic operation. Controller 110 receives various inputs, including torque demand and rotor position/speed. '895 patent at 2:24-30. The output of the controller is input into drive 108, which outputs three energizable phase windings 106A, 106B, and 106C to the motor. Id. at 2:16-22. Each winding wraps around the motor 101, which comprises stator 102 and rotor 104. Id. at 2:14-16.

         (IMAGE OMITTED)

         Motor control values can be expressed relative to two different frames of reference: the stationary frame of reference and the rotating frame of reference. The stationary frame of reference calculates values relative to the position of the stator. For example, voltages 106A-C in Figure 1 are expressed in the stationary reference frame. Id. at 3:21-25. The rotating frame of reference calculates values relative to the position of the rotor. In the rotating frame of reference, the d-axis is aligned with the rotor, and the q-axis is offset by 90 degrees. A signal in the rotating frame of reference contains both q-axis and d-axis components.

         Figure 2 provides a more detailed description of the operation of the controller. The dispute in this case centers on the vectorize block 212. The inputs to the vectorize block are reference currents IQr demand 208 and Idr demand 209. The IQr and Idr demand signals are "concatenated" in vectorize block 212 to produce IQdr demand signal 214. Id. at 3:3-13.

         (IMAGE OMITTED)

         Id. at Fig. 2. Claim 12, from which challenged claim 21 depends, requires “combining the IQr demand and the dr axis injection current [Idr] demand to produce an IQdr demand." Id. at 10:1-16. The Board construed (1) "IQr demand" as "Q-axis demand current;" (2) "dr-axis injection current demand" as "d-axis injection current;" and (3) "IQdr demand" as "a current demand that includes Q-and d-axis current demands." J.A. 14. Neither party challenges these constructions on appeal.

         The Board found Kusaka anticipates claim 21 of the '895 patent. Kusaka is a patent assigned to Toyota that discloses ...


Buy This Entire Record For $7.95

Download the entire decision to receive the complete text, official citation,
docket number, dissents and concurrences, and footnotes for this case.

Learn more about what you receive with purchase of this case.