JPS566170A - Iron loss measuring instrument - Google Patents
Iron loss measuring instrumentInfo
- Publication number
- JPS566170A JPS566170A JP8013679A JP8013679A JPS566170A JP S566170 A JPS566170 A JP S566170A JP 8013679 A JP8013679 A JP 8013679A JP 8013679 A JP8013679 A JP 8013679A JP S566170 A JPS566170 A JP S566170A
- Authority
- JP
- Japan
- Prior art keywords
- switch
- voltage
- resistance
- operational amplifier
- iron loss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
PURPOSE: To take iron loss measurement of high precision by a simple circuit while removing an influence of a high frequency by performing multistage synchronous rectification and by eliminating the need for a multiplier by the use of synchronous rectification.
CONSTITUTION: To the output of operational amplifier 7 constituting the 1st- stage synchronous rectifying circuit, operational amplifier 10 is connected by way of resistance R3 and switch S2, resistance R4 and switch S4, and resistance R5 to bring those switches S2 and S3 under the on-off control of switch driving circuit 8A, and the output of operational amplifier 10 is measured by voltmeter 9. Switch S1 is turned on at 0° of voltage VR and off at 180°, and switch S2 on at 30° of voltage VR and off at 150°; and switch S3 is on at 60° of voltage VR and off at 120°, so that higher harmonics up to the ninth degree can be removed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8013679A JPS566170A (en) | 1979-06-27 | 1979-06-27 | Iron loss measuring instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8013679A JPS566170A (en) | 1979-06-27 | 1979-06-27 | Iron loss measuring instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS566170A true JPS566170A (en) | 1981-01-22 |
Family
ID=13709826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8013679A Pending JPS566170A (en) | 1979-06-27 | 1979-06-27 | Iron loss measuring instrument |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS566170A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58197991A (en) * | 1982-05-14 | 1983-11-17 | Nippon Telegr & Teleph Corp <Ntt> | Important call connecting system |
JPH01167686A (en) * | 1987-12-24 | 1989-07-03 | Naruse Kagaku Kikai Kk | Magnetostriction measuring instrument |
-
1979
- 1979-06-27 JP JP8013679A patent/JPS566170A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58197991A (en) * | 1982-05-14 | 1983-11-17 | Nippon Telegr & Teleph Corp <Ntt> | Important call connecting system |
JPH01167686A (en) * | 1987-12-24 | 1989-07-03 | Naruse Kagaku Kikai Kk | Magnetostriction measuring instrument |
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