JPS6431394A - Discharge lamp lighting device - Google Patents
Discharge lamp lighting deviceInfo
- Publication number
- JPS6431394A JPS6431394A JP18790987A JP18790987A JPS6431394A JP S6431394 A JPS6431394 A JP S6431394A JP 18790987 A JP18790987 A JP 18790987A JP 18790987 A JP18790987 A JP 18790987A JP S6431394 A JPS6431394 A JP S6431394A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- normal
- lamps
- balancer
- winding
- 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
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
PURPOSE:To reliably detect a no-load state by setting the threshold voltage to the voltage between the output voltage of a voltage detecting circuit when multiple discharge lamps are all normal and the zero voltage. CONSTITUTION:The threshold voltage E of a voltage judging circuit 7 is set to 0<E<E1, where E1 is the voltage value across the smoothing capacitor 63 of a voltage detecting circuit 6 when both discharge lamps L1, L2 are normal. The voltage of at least one terminal of the winding of a balancer 5 in reference to the middle point of the winding of the balancer 5 of this discharge lamp device is the preset value when both lamps L1, L2 are normal and becomes entirely zero in a no-load state that both discharge lamps L1, L2 are removed. When one lamp is removed or one lamp is in the half-wave discharge state, the voltage of at least one terminal of the winding of the balancer 5 becomes higher than the normal value. If the threshold voltage E is set to the voltage between the output voltage of the circuit 6 when both lamps L1, L2 are normal and the zero voltage, the no-load state is reliably detected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18790987A JPS6431394A (en) | 1987-07-27 | 1987-07-27 | Discharge lamp lighting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18790987A JPS6431394A (en) | 1987-07-27 | 1987-07-27 | Discharge lamp lighting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6431394A true JPS6431394A (en) | 1989-02-01 |
Family
ID=16214327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18790987A Pending JPS6431394A (en) | 1987-07-27 | 1987-07-27 | Discharge lamp lighting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6431394A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6672257B1 (en) | 1994-05-06 | 2004-01-06 | Foster-Miller, Inc. | Upper bundle steam generator cleaning system and method |
USRE38542E1 (en) | 1994-05-06 | 2004-07-06 | Foster-Miller, Inc. | Upper bundle steam generator cleaning system and method |
US7282868B2 (en) | 2003-02-10 | 2007-10-16 | Masakazu Ushijima | Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system |
JP2008034206A (en) * | 2006-07-27 | 2008-02-14 | Sumida Corporation | Inverter circuit |
US7589478B2 (en) | 2003-02-10 | 2009-09-15 | Masakazu Ushijima | Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system |
-
1987
- 1987-07-27 JP JP18790987A patent/JPS6431394A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6672257B1 (en) | 1994-05-06 | 2004-01-06 | Foster-Miller, Inc. | Upper bundle steam generator cleaning system and method |
USRE38542E1 (en) | 1994-05-06 | 2004-07-06 | Foster-Miller, Inc. | Upper bundle steam generator cleaning system and method |
US6820575B2 (en) | 1994-05-06 | 2004-11-23 | Foster-Miller, Inc. | Upper bundle steam generator cleaning, inspection, and repair system |
US7282868B2 (en) | 2003-02-10 | 2007-10-16 | Masakazu Ushijima | Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system |
US7589478B2 (en) | 2003-02-10 | 2009-09-15 | Masakazu Ushijima | Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system |
JP2008034206A (en) * | 2006-07-27 | 2008-02-14 | Sumida Corporation | Inverter circuit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2148399A1 (en) | Protection circuit for arc discharge lamps | |
CA2155140A1 (en) | Ballast containing protection circuit for detecting rectification of arc discharge lamp | |
JPS6431069A (en) | Battery type apparatus | |
AU3507589A (en) | Voltage controlling and indicating device | |
CA2199200A1 (en) | Detection and protection circuit for fluorescent lamps operating at failure mode | |
JPS6431394A (en) | Discharge lamp lighting device | |
IT8883649A0 (en) | RECIRCULATION CIRCUIT OF THE DISCHARGE CURRENT OF AN INDUCTIVE LOAD, SELECTABLE FOR SLOW OR FAST RECIRCULATION | |
CA2006280A1 (en) | Electronic ballast circuit for discharge lamp | |
EP0821546A3 (en) | Lighting circuit for discharge lamp | |
EP0301904A3 (en) | Circuit for automatic paralleling of ac power sources | |
JPS6431393A (en) | Discharge lamp lighting device | |
EP0414039A3 (en) | Root mean square measuring circuit, in particular for measuring the effective value of an ac voltage | |
JPS57211421A (en) | Wire cut discharge machining power source equipment | |
JPS6489294A (en) | Discharge lamp lighting device | |
JPS54109266A (en) | Lighting equipment | |
CA2004563A1 (en) | Current monitoring | |
JPS6454698A (en) | Lighting device for discharge lamp | |
ATE138239T1 (en) | AUTOMATIC ZERO POINT DETECTION | |
JPS6454696A (en) | Lighting device for discharge lamp | |
JPS6455074A (en) | Dc power supply source | |
JPS56129460A (en) | Overcurrent preventing device | |
Nuver | Lighting Circuits | |
JPS6474035A (en) | No-break power unit | |
JPS5798822A (en) | Device for detecting luminous flux of fluorescent lamp | |
JPS5790723A (en) | Power supply device |