JPS5613583A - Revolving-magnetic-field driver of series resonance type - Google Patents

Revolving-magnetic-field driver of series resonance type

Info

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
Application number
JP8891479A
Other languages
Japanese (ja)
Inventor
Tsunesuke Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8891479A priority Critical patent/JPS5613583A/en
Publication of JPS5613583A publication Critical patent/JPS5613583A/en
Pending legal-status Critical Current

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
JP8891479A 1979-07-13 1979-07-13 Revolving-magnetic-field driver of series resonance type Pending JPS5613583A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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