JPS5613583A - Revolving-magnetic-field driver of series resonance type - Google Patents
Revolving-magnetic-field driver of series resonance typeInfo
- Publication number
- JPS5613583A JPS5613583A JP8891479A JP8891479A JPS5613583A JP S5613583 A JPS5613583 A JP S5613583A JP 8891479 A JP8891479 A JP 8891479A JP 8891479 A JP8891479 A JP 8891479A JP S5613583 A JPS5613583 A JP S5613583A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- switches
- capacitor
- closed
- positive
- 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
Abstract
PURPOSE: To make it possible to positive-negative symmetric coil current only by a unipolar electric power source by switching alternate terminals at both sides of a series circuit of a driving coil and capacitor from a positive potential to zero.
CONSTITUTION: With switches S5 and S4 closed, capacitor C is charged and capacitor voltage Vc and coil voltage Vs1 of the switch S1 side increase from zero to +Vo. After initial charging, switches S5 and S4 are opened while switches S2 and S3 are closed. As a result, voltage Vs2 at the coupling point between switches S3 and S4 changes to +V1 and voltage Vs1 drops to OV; and voltage Vc increases to +(V0+V1) and Vc loses V1 due to a revolution loss to reach -V0 a half period later. For the purpose, switches S2 and S3 are opened and S1 and S4 are closed a half period later to set voltage Vs2 to OV and Vs1 to +V1 and consequently, voltage Vc changes to -(Vo+V1) and then approximates to +Vo a half cycle later. As a result, voltage Vc-Vs1 applied to driving coil L has the same waveform with voltage Vc at any time, so that it will be symmetrical between the positive and negative.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8891479A JPS5613583A (en) | 1979-07-13 | 1979-07-13 | Revolving-magnetic-field driver of series resonance type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8891479A JPS5613583A (en) | 1979-07-13 | 1979-07-13 | Revolving-magnetic-field driver of series resonance type |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5613583A true JPS5613583A (en) | 1981-02-09 |
Family
ID=13956193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8891479A Pending JPS5613583A (en) | 1979-07-13 | 1979-07-13 | Revolving-magnetic-field driver of series resonance type |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5613583A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5851063A (en) * | 1981-09-08 | 1983-03-25 | ハワ−ド・ジエイムズ・バ−ネツト | Method and apparatus for polishing surface of lens |
JPS61156348A (en) * | 1984-12-27 | 1986-07-16 | Nec Corp | Memory device |
-
1979
- 1979-07-13 JP JP8891479A patent/JPS5613583A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5851063A (en) * | 1981-09-08 | 1983-03-25 | ハワ−ド・ジエイムズ・バ−ネツト | Method and apparatus for polishing surface of lens |
JPS61156348A (en) * | 1984-12-27 | 1986-07-16 | Nec Corp | Memory device |
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