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1. 发明公开

EP4135483A1 OVERVOLTAGE-PROTECTED CURRENT LIMITER FOR A POWER SUPPLY OF A LIGHTING CONTROL BUS 无效
公开(公告)号：EP4135483A1
公开(公告)日：2023-02-15
申请号：EP21191173.0
申请日：2021-08-13
申请人： Tridonic GmbH & Co. KG
发明人： Schertler, Markus , Diez, Nikolaus
IPC分类号： H05B47/18 , H02H9/00
摘要： Disclosed is a current limiter (1) for a power supply (2) of a lighting control bus (6). The current limiter (1) comprises a first switch (12) arranged serially in a current path of the lighting control bus (6). The first switch (12) is configured to gate a current (I) of the lighting control bus (6) in accordance with a voltage (V) of the lighting control bus (6) applied to a control terminal of the first switch (12). The current limiter (1) further comprises a voltage divider (15, 16) connected in parallel to the current path. The current limiter (1) further comprises a second switch (17) interposed between the control terminal of the first switch (12) and an outer terminal of the voltage divider (15, 16). The second switch (17) is configured to shunt the voltage applied to the control terminal of the first switch (12) in accordance with a current (I B ) into the control terminal of the second switch (17). The current limiter (1) further comprises a Zener diode (18) interposed between the control terminal of the second switch (17) and an inner terminal of the voltage divider (15; 16). The Zener diode (18) is configured to gate the current (I B ) into the control terminal of the second switch (17) in accordance with a voltage drop between the inner terminal and the outer terminal of the voltage divider (15, 16) in excess of a reverse breakdown voltage of the Zener diode (18). This achieves an overvoltage protection of the first switch (12) and the current limiter (1).

2. 发明公开

EP4135482A1 RIPPLE-REDUCING CURRENT LIMITER FOR A POWER SUPPLY OF A LIGHTING CONTROL BUS 审中-公开
公开(公告)号：EP4135482A1
公开(公告)日：2023-02-15
申请号：EP21191169.8
申请日：2021-08-13
申请人： Tridonic GmbH & Co. KG
发明人： Schertler, Markus , Diez, Nikolaus
IPC分类号： H05B47/18 , H02H9/00
摘要： Disclosed is a current limiter (1) for a power supply (2) of a lighting control bus (6). The current limiter (1) comprises a resistor (11) and a switch (12) arranged serially in a current path of the lighting control bus (6). The switch (12) is configured to gate a current (I) of the lighting control bus (6) in accordance with a voltage (V) of the lighting control bus (6) applied to a control terminal of the switch (12). The resistor (11) is configured to sense the current (I) gated by the switch (12) as a voltage drop there across. The current limiter (1) further comprises a reference diode (13) configured to shunt the voltage (V) applied to the control terminal of the switch (12) in accordance with the voltage drop across the resistor (11). The current limiter (1) further comprises a capacitor (14) connected in parallel to the reference diode (13). This avoids high output current ripple when the current (I) is limited by the circuit.

3. 发明公开

EP4060887A1 COST AND SIZE OPTIMIZED DALI POWER SUPPLY 有权
公开(公告)号：EP4060887A1
公开(公告)日：2022-09-21
申请号：EP21163025.6
申请日：2021-03-17
申请人： Tridonic GmbH & Co. KG
发明人： Schertler, Markus , Diez, Nikolaus , Moosbrugger, Markus
IPC分类号： H02M3/335
摘要： Disclosed is a power supply (1) for a lighting control bus (2), comprising an isolated power converter (101) configured to inductively supply power from a primary side (102) of the converter to a secondary side (103) of the converter (101); the secondary side (103) comprising output terminals (104) connectable to the lighting control bus (2); the primary side (102) comprising a switch (105); and
a control circuit (106) configured to control, in a first conduction mode of the switch (105), a duty cycle of the switch (105) in dependence of a variation of an output voltage (107) of the power supply (1) measured on the primary side (102), and configured to adjust, in a second conduction mode of the switch (105), a duration of a switching cycle of the switch (105) in dependence of a variation of an average output current (108) of the power supply (1) measured on the primary side (102). This provides a cost and size optimized power supply for a lighting control bus.

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