JPS5563587A - Driving circuit for induction motor - Google Patents
Driving circuit for induction motorInfo
- Publication number
- JPS5563587A JPS5563587A JP13607278A JP13607278A JPS5563587A JP S5563587 A JPS5563587 A JP S5563587A JP 13607278 A JP13607278 A JP 13607278A JP 13607278 A JP13607278 A JP 13607278A JP S5563587 A JPS5563587 A JP S5563587A
- Authority
- JP
- Japan
- Prior art keywords
- resistances
- damping
- contacts
- current
- regenerative current
- 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.)
- Granted
Links
Abstract
PURPOSE: To reduce number of resistances for making a circuit small and also for lowering the production cost, by utilizing a resistance for limiting inrush current to a smoothing capacitor of a regular converter for both the purposes of a regenerative current consuming resistance and a DC damping current limiting resistance.
CONSTITUTION: At the time when an AC power source 1 was turned on and a regular converter 2 started operating, inrush current to a smoothing capacitor 27 is made to pass through resistances 41 and 42 by leaving a contact r1 in OFF position for a fixed period of time. The contact r1 is closed upon elapsing of a fixed period of time after turning on of the power source. By rising of terminal voltage of a capacitor 28 due to charging of regenerative current, a regenerative current control circuit 43 turns on a transistor 44, and the regenerative current is consumed through the resistances 41 and 42. In the case of DC damping, if contacts r21 through r23 are left opened and contacts r31 and r32 are left closed, DC damping can be applied to an electric motor 4 through the regular converter 2, the resistances 41 and 42, a damping circuit 45 and the contacts r31 and r32.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53136072A JPS5831826B2 (en) | 1978-11-04 | 1978-11-04 | Induction motor drive circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53136072A JPS5831826B2 (en) | 1978-11-04 | 1978-11-04 | Induction motor drive circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5563587A true JPS5563587A (en) | 1980-05-13 |
JPS5831826B2 JPS5831826B2 (en) | 1983-07-08 |
Family
ID=15166561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53136072A Expired JPS5831826B2 (en) | 1978-11-04 | 1978-11-04 | Induction motor drive circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5831826B2 (en) |
-
1978
- 1978-11-04 JP JP53136072A patent/JPS5831826B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5831826B2 (en) | 1983-07-08 |
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