JPS5454231A - Protective circuit for voltage type inverter - Google Patents
Protective circuit for voltage type inverterInfo
- Publication number
- JPS5454231A JPS5454231A JP12061377A JP12061377A JPS5454231A JP S5454231 A JPS5454231 A JP S5454231A JP 12061377 A JP12061377 A JP 12061377A JP 12061377 A JP12061377 A JP 12061377A JP S5454231 A JPS5454231 A JP S5454231A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- short
- thyristor
- type inverter
- voltage type
- 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 reduce the OFF loss of an inverter switching element at the time of the output short-circuit by connecting a switching element in parallel with a filter capacitor and rendering the switching element conductive at the time of the presence of overcurrent.
CONSTITUTION: A short-circuit protection circuit 9 including a thyristor 5 is provided in parallel with a filter capacitor 3 in a voltage type inverter DC circuit using a thyristor or transistor. Thus, upon occurrence of an output short-circuit or arm short-circuit the thyristor 5 is fired to cause discharge of the filter capacitor 3. As a result, voltage VC is reduced to reduce current IT so as to reduce the transistor OFF loss VCE X IT=PWT, to that it is possible to prevent rupture of the element at the time of occurrence of a short-circuit
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12061377A JPS5454231A (en) | 1977-10-07 | 1977-10-07 | Protective circuit for voltage type inverter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12061377A JPS5454231A (en) | 1977-10-07 | 1977-10-07 | Protective circuit for voltage type inverter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5454231A true JPS5454231A (en) | 1979-04-28 |
Family
ID=14790570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12061377A Pending JPS5454231A (en) | 1977-10-07 | 1977-10-07 | Protective circuit for voltage type inverter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5454231A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57199475A (en) * | 1981-05-29 | 1982-12-07 | Mitsubishi Electric Corp | Protective device for inverter |
JPS62250878A (en) * | 1986-04-23 | 1987-10-31 | Mitsubishi Electric Corp | Semiconductor device |
-
1977
- 1977-10-07 JP JP12061377A patent/JPS5454231A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57199475A (en) * | 1981-05-29 | 1982-12-07 | Mitsubishi Electric Corp | Protective device for inverter |
JPS62250878A (en) * | 1986-04-23 | 1987-10-31 | Mitsubishi Electric Corp | Semiconductor device |
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