JPS5467638A - Frequency converter - Google Patents
Frequency converterInfo
- Publication number
- JPS5467638A JPS5467638A JP13420477A JP13420477A JPS5467638A JP S5467638 A JPS5467638 A JP S5467638A JP 13420477 A JP13420477 A JP 13420477A JP 13420477 A JP13420477 A JP 13420477A JP S5467638 A JPS5467638 A JP S5467638A
- Authority
- JP
- Japan
- Prior art keywords
- reverse bias
- circuit
- thyristor
- output signal
- bias voltage
- 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 improve the thyristor switching characteristics by detecting the zero crossing time of a thyristor anode current or commutation circuit current and applying gate reverse bias voltage in response to the zero cross signal.
CONSTITUTION: The output signal pg of a pulse generator 44 for generating periodical pulse pg is applied to the set input terminal of reverse bias setting circuit 46 and pulse amplifier 45. The output signal from the circuit 46 is applied to a gate reverse bias circuit 47. The output signal 8c of a zero cross detector 48 is applied to the reset input terminal T of the circuit 46 to thus become the reset signal for preparing timing for applying the gate reverse bias voltage. When the gate reverse bias voltage Vgr is applied in the vicinity of zero crossing time of the anode current Is of a thyristor 33, it can improve the switching chracteristics of the thyristor 33.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13420477A JPS5467638A (en) | 1977-11-08 | 1977-11-08 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13420477A JPS5467638A (en) | 1977-11-08 | 1977-11-08 | Frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5467638A true JPS5467638A (en) | 1979-05-31 |
Family
ID=15122849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13420477A Pending JPS5467638A (en) | 1977-11-08 | 1977-11-08 | Frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5467638A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0546206U (en) * | 1991-11-26 | 1993-06-22 | ヤンマー農機株式会社 | Fertilizer pushing device for ridge stand multi-tasking machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50161630A (en) * | 1974-06-18 | 1975-12-27 |
-
1977
- 1977-11-08 JP JP13420477A patent/JPS5467638A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50161630A (en) * | 1974-06-18 | 1975-12-27 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0546206U (en) * | 1991-11-26 | 1993-06-22 | ヤンマー農機株式会社 | Fertilizer pushing device for ridge stand multi-tasking machine |
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