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`PATENT ABSTRACTS OF JAPAN
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`2003-348885
`(11)Publication number :
`(43)Date of publication of application : 05.12.2003
`
`(51)Int.Cl.
`
` H02P 6/18
` F24F 11/02
` H02P 21/00
`
`(21)Application number : 2002-149449
`
`(22)Date of filing :
`
`23.05.2002
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`(71)Applicant : SANYO ELECTRIC CO LTD
`SANYO ELECTRIC AIR
`CONDITIONING CO LTD
`(72)Inventor : HIBI HIDEJI
`YAMAGAMI YOSHINARI
`YOSHIDA HIROSHI
`
`(54) METHOD AND APPARATUS FOR CONTROLLING PERMANENT MAGNET SYNCHRONOUS
`MOTOR
`(57)Abstract:
`PROBLEM TO BE SOLVED: To obtain the operation state
`of a permanent magnet synchronous motor at starting,
`especially the operation state of a pair which is driven by
`the permanent magnet synchronous motor, with no sensor
`such as a Hall IC.
`SOLUTION: An induced voltage at a brushless DC motor is
`detected (step S2). The operation state of brushless DC
`motors 30A and 30B is detected based on the detected
`induced voltage (steps S3 and S5).
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`http://www19.ipdl.inpit.go.jp/PA1/result/detail/main/w_PujqaDA415348885P1.htm
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`7/2/2014
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`1
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`IPR2015-00762 - EXHIBIT 1004
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`Zhongshan Broad Ocean Motor Co., Ltd, Petitioner
`
`Nidec Motor Corporation, Patent Owner
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