专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2002357648A PHASE DIFFERENCE ANGLE DISPLAY DEVICE FOR SYNCHRONOUS MOTOR 失效
公开(公告)号：JP2002357648A
公开(公告)日：2002-12-13
申请号：JP2001163802
申请日：2001-05-31
申请人： HIOKI ELECTRIC WORKS , HONDA MOTOR CO LTD
发明人： YAMAGISHI KIMIHIKO , HARUHARA HIDEHIKO , HANDA NOBUHISA , KUBOTA KUNIHISA , SHIN HIROBUMI , KISHIDA MAKOTO , YAMAMOTO KEIICHI , SHINOKI HIROAKI
IPC分类号： G01R31/34 , G01R25/00 , H02P6/06 , H02P6/08 , H02P6/18 , H02P6/182 , H02P27/02 , H02P7/622
摘要： PROBLEM TO BE SOLVED: To easily visually grasp the phase relation between the stator winding and rotator magnetic pole of a synchronous motor. SOLUTION: When the phase difference angle generated between the stator winding and rotor magnetic pole of the synchronous motor changed according to load is determined from the voltage (or current) supplied to the synchronous motor and an external synchronous signal (e.g. rotation pulse) obtained from the synchronous motor and displayed, a complex vector plane is set in a display part, either one of the external synchronous signal and the voltage basic wave is set on a real axial reference line, and the other is vector-displayed by the phase difference angle.

2. 发明专利

JPH05126871A METHOD FOR INDICATING EFFICIENCY IN WATTMENTER 失效
公开(公告)号：JPH05126871A
公开(公告)日：1993-05-21
申请号：JP31410391
申请日：1991-10-31
申请人： HIOKI ELECTRIC WORKS
发明人： HARUHARA HIDEHIKO , KOYAMA KYOICHI
IPC分类号： G01R21/00
摘要： PURPOSE:To select automatically the operation expression corresponding to the line mode of a line to be measured and the number of channels to be used, and to indicate the efficiency of the line correctly, by setting the mode and the number. CONSTITUTION:Each power measured in at least three single-phase power measuring part is converted into a digital signal in an A/D converting part. The ratio (efficiency) of the primary side power and secondary side power of the measured line connected to the object to be measured is operated to be indicated in a wattmeter by a CPU on the basis of their digital signals. In the wattmeter, the CPU selects, to operate the efficiency operation, the expression of W2/W1 (W2 is the secondary side power, W1 is the primary side power), and indicates the efficiency of the measured line, if the line is of single-phase two-wire. If the line is of single-phase three-wire or three-phase three-wire, the CPU selects, to operate the efficiency operation, the expression of W3/(W1+W2) (W3 is the secondary side power, W1, W2 are the primary side powers), and indicates the efficiency of the measured line.

3. 发明专利

JP2001183477A MEASUREMENT DEVICE 失效
公开(公告)号：JP2001183477A
公开(公告)日：2001-07-06
申请号：JP37204799
申请日：1999-12-28
申请人： HIOKI ELECTRIC WORKS
发明人： HARUHARA HIDEHIKO
IPC分类号： G04G3/00 , G04G3/02 , G04G99/00
摘要： PROBLEM TO BE SOLVED: To provide a measurement device, capable of improving the precision of a built-in clock. SOLUTION: The measurement device 1 comprises an analog-to-digital converter 3 for analog-digital conversion of a commercial AC to generate voltage data DV, a real-time clock circuit 22 for generating clock data DT, and clock- correcting parts 24, 11, 12, 13 for extracting a synchronous signal SSY synchronous with the cycle of the commercial AC from either the commercial AC or the voltage data DV, generating a clock data correcting signal ST, when measuring a preset number of extracted synchronous signals SSY and correcting the clock DT for the real clock circuit 22, according to the clock data correcting signal ST. After the extraction and measurement of the synchronous signal SSY, the clock-correcting parts stop at least one processing of extraction and measurement for the synchronous signal SSY and resume the stopped processing at the time, when a shorter stand-by time than the cycle of the commercial AC passed.

4. 发明专利

JP2000292447A MEASURING APPARATUS 失效
公开(公告)号：JP2000292447A
公开(公告)日：2000-10-20
申请号：JP9826399
申请日：1999-04-06
申请人： HIOKI ELECTRIC WORKS
发明人： HARUHARA HIDEHIKO
IPC分类号： G04G3/00 , G01R13/20 , G01R21/00 , G04G5/00
摘要： PROBLEM TO BE SOLVED: To provide a measuring apparatus which can be miniaturized and which can be made low-cost. SOLUTION: This measuring apparatus 1 is provided with an analog-to-digital converter 3 which generates voltage data DV by analog-to-digital-converting a commercial alternating current. The measuring apparatus is provided with a real-time clock circuit 22 which generates time data DT. The measuring apparatus is provided with a time correction part 24 which corrects the time data DT of the real-time clock circuit 22 in synchronization with the frequency of the commercial alternating current. In the measuring apparatus, a measuring and processing operation is executed on the basis of the voltage data DV, and the time which is based on the generated time data DT is displayed on a display part 21. The time correction part 24 corrects the time data DT on the basis of a periodic parameter which is contained in the voltage data DV.

5. 发明专利

JPH0862251A CLAMP TYPE AMMETER WITH DOUBLE-STRUCTURE TYPE CYLINDRICAL BOBBIN 失效
公开(公告)号：JPH0862251A
公开(公告)日：1996-03-08
申请号：JP22418694
申请日：1994-08-24
申请人： HIOKI ELECTRIC WORKS
发明人： NAGAI AKIHIRO , WATANABE HIDEO , HARUHARA HIDEHIKO
IPC分类号： G01R1/22
摘要： PURPOSE: To facilitate the fitting of a cylindrical bobbin to a magnetic core and to extend a creeping distance. CONSTITUTION: The bobbin has a double structure consisting of inner and outer cylindrical bodies 50 and 52 which can be split along the longitudinal direction of a magnetic core 30 for fitting a cylindrical bobbin 36, both joint surfaces of the inner cylindrical body 50 are laid out on opposing both surfaces of the magnetic core 30, the both joint surfaces of the outer cylindrical body are laid out on the other opposing surfaces of the magnetic core 30. Then, four points, namely two joint points located at the outermost part of the inner cylindrical body 50 at the same cross part of the cylindrical bobbin 36 fitted to the magnetic core 30 and those located at the innermost part of an outer cylindrical body 52, are laid out so that they are different from each other nearly 90 degrees in reference to the center of the magnetic core 30.

你已经成功收藏专利！

检索式保存成功!

IPRDB