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1. 发明专利

JP2002311067A LOW-COST ELECTRIC POWER MEASURING DEVICE FOR MEASUREMENT OF ELECTRIC POWER OF A PLURALITY OF MOTORS 审中-公开
公开(公告)号：JP2002311067A
公开(公告)日：2002-10-23
申请号：JP2002038429
申请日：2002-02-15
申请人： BAVELLONI SPA Z
发明人： FRANCO BAVELLONI
IPC分类号： G01R29/20 , G01R21/00 , G01R21/06 , H02P5/68 , H02P7/68
摘要： PROBLEM TO BE SOLVED: To provide a measured value of electric power sufficiently accurate for control of a motor. SOLUTION: An electric power measuring device for measurement of electric power of a motor, which comprises a current measuring means 1 for measuring a current I1-n sent to the motor and a voltage measuring means 3 for measuring a voltage corresponding to the current I1-n sent to the motor, has a phase shifting means 4 for shifting the phase of the waveform of the voltage measured by the voltage measuring means 3, and a multiplying means 5 for multiplying the current measured by the current measuring means 1 by the voltage phase- shifted by the phase shifting means 4 and outputting an output signal that is processed to produce active power.

2. 发明专利

JP3160043B2 失效
公开(公告)号：JP3160043B2
公开(公告)日：2001-04-23
申请号：JP34388691
申请日：1991-12-02
IPC分类号： G01R31/06 , G01R27/26 , G01R29/20

3. 实用新型

JPH04110983U 失效
公开(公告)号：JPH04110983U
公开(公告)日：1992-09-25
申请号：JP1492791
申请日：1991-03-14
IPC分类号： G01R27/00 , G01R29/20

4. 实用新型

JPH0317266Y2 失效
公开(公告)号：JPH0317266Y2
公开(公告)日：1991-04-11
申请号：JP543685
申请日：1985-01-21
IPC分类号： G01R29/20 , G01R1/06

5. 发明专利

JPH02140669A TESTING DEVICE FOR CURRENT TRANSFORMER 失效
公开(公告)号：JPH02140669A
公开(公告)日：1990-05-30
申请号：JP29355888
申请日：1988-11-22
申请人： TOSHIBA CORP
发明人： BABA YASUO , SERIZAWA SUMIO
IPC分类号： G01R31/00 , G01R29/20
摘要： PURPOSE:To perform a current ratio test and a polarity confirmation test at the same time by making a small sinewave current come from a current generating part to pass through a matching part and an amplifier part. CONSTITUTION:The small sinewave current (a) is supplied by the current generating part 1 to the matching part 2 and the primary winding 6 of a current transformer to be tested. Next, the current (a) is converted to a reference current (b) through the matching part 2 and the amplifier part 3, then supplied to a differential voltage detecting part 4. On the other hand, the current (a) supplied to the primary winding 6 of the current transformer to be tested is supplied to the differential voltage detecting part 4 generating a secondary winding current (c) in accordance with the winding ratio of the primary winding 6 and the secondary winding 7. By the detection part 4, the differential voltage is detected in the manner of combining the currents (b) and (c), and converted to a display signal (f) then sent to the display part 5. The signal (f) is indicated on the display part 5. The winding ratio of the primary winding and the polarity for the current transformer are thus tested at the same time.

6. 发明专利

JPS5934166A Measuring device of transformer loss 失效
标题翻译：变压器损失的测量装置
公开(公告)号：JPS5934166A
公开(公告)日：1984-02-24
申请号：JP14421582
申请日：1982-08-20
申请人： Mitsubishi Electric Corp
发明人： HONDA YUKIHIRO , TSUYA NAOKI , GOUNAI TOSHIO
IPC分类号： H01F27/00 , G01R21/06 , G01R29/20
CPC分类号： G01R29/20 , G01R31/027
摘要： PURPOSE:To reduce a measuring error, by detecting a difference of input/output currents of a transformer by the same current probe, and detecting a difference of input/output voltages of the transformer by the same voltage probe. CONSTITUTION:An output of an oscillator 2 of a loss measuring device 1 supplies power to the primary side of a transformer to be tested 3. Also, the secondary side of the transformer 3 is connected to a load 4. In this state, a current probe 11 detects a difference of an input current and an output current of the transformer 3. Also, a voltage probe 12 detects a difference of input voltage and output voltage of the transformer 3. Outputs of the current probe 11 and a voltage probe 5, and outputs of current probe 10 and the voltage probe 12 are inputted to U-function meters 6, 9, respectively, and each cross power is derived. Subsequently, a transformer loss is derived by the sum of each cross power.
摘要翻译：目的：通过同一电流探头检测变压器输入/输出电流的差异，并通过同一个电压探头检测变压器的输入/输出电压差，以减少测量误差。构成：损耗测量装置1的振荡器2的输出向要测试的变压器3的初级侧供电。此外，变压器3的次级侧连接到负载4.在该状态下，电流探针11检测变压器3的输入电流和输出电流的差。另外，电压探头12检测变压器3的输入电压和输出电压的差。电流探头11和电压探头5的输出，并且电流探头10和电压探头12的输出分别输入到功能表6,9，并且导出每个交叉功率。随后，通过每个交叉功率的和导出变压器损耗。

7. 实用新型

JPS5580759U 失效
公开(公告)号：JPS5580759U
公开(公告)日：1980-06-03
申请号：JP16331778
申请日：1978-11-28
IPC分类号： G01R29/20 , G01R31/06

8. 发明专利

JPS54118520A DEVICE FOR MEASURING TRANSFORMATION RATIO OF TRANSFORMER FOR DC MEASURING INSTRUMENT 失效
公开(公告)号：JPS54118520A
公开(公告)日：1979-09-14
申请号：JP2538378
申请日：1978-03-08
申请人： HITACHI LTD
发明人： TAGUCHI KAZUO , KOMINATO TOSHIBUMI
IPC分类号： G01R29/20 , G01R31/06
摘要： PURPOSE:To increased the precision of measurement of the transformation ratio by comparing the primary and secondary side DC voltages of the transformer with a null method using a voltage comparator circuit. CONSTITUTION:A DC voltage M1 proportional to the primary side DC input to a transformer 5 for a DC measuring instrument and a DC voltage M2 proportional to the secondary side output are obtained, and one of these DC voltages and a DC voltage taken out from the other voltage through a voltage divider consisiting of resistors 9b and 9g are compared with a voltage comparator circuit 9a for obtaining the transformation ratio of the transformer from the resistance ratio of the voltage divider by making both the DC voltages equal. In this way, precise measurement of the transformation ratio of the transformer can be obtained by comparing the primary and secondary side DC voltages of the transformer with a null method using a voltage comparator circuit and deriving the transformation ratio of the transformer from the resistance ratio of the voltage divider at that time.

9. 实用新型

JPS5396622U 失效
公开(公告)号：JPS5396622U
公开(公告)日：1978-08-05
申请号：JP118177
申请日：1977-01-11
IPC分类号： H01F38/28 , G01R29/20 , H01F30/00 , H01F40/06

10. 实用新型

JPS5211121U 失效
公开(公告)号：JPS5211121U
公开(公告)日：1977-01-26
申请号：JP9680275
申请日：1975-07-11
IPC分类号： G01R29/20 , G01R35/02 , G01R35/04 , H01F40/06

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