CN1192682C - 电路系统和配备有这种电路系统的信号灯 - Google Patents

电路系统和配备有这种电路系统的信号灯 Download PDF

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CN1192682C
CN1192682C CNB988014033A CN98801403A CN1192682C CN 1192682 C CN1192682 C CN 1192682C CN B988014033 A CNB988014033 A CN B988014033A CN 98801403 A CN98801403 A CN 98801403A CN 1192682 C CN1192682 C CN 1192682C
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circuits system
water conservancy
conservancy diversion
semiconductor light
signal lamp
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CN1241349A (zh
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M·J·M·布克斯
E·B·G·尼霍夫
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Koninklijke Philips NV
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs

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Abstract

本发明涉及一种电路系统，供控制半导体光源的工作过程，配备有：接线端子，供与控制部分连接；输入滤波装置；一个变换器，构成控制电路；和输出端子，供与半导体光源连接。按照本发明，电路系统还配备有一个自行调节导流网络。本发明还涉及配备有这种电路系统的信号灯。

Description

电路系统和配备有这种电路系统的信号灯
技术领域
本发明涉及一种用以控制半导体光源工作过程的电路系统，这种电路系统配备有：
接线端子，供与控制单元连接；
输入滤波装置；
变换器，包括控制电路；和
输出端子，供与半导体光源连接。本发明还涉及配备有这种电路系统的信号灯。
背景技术
信号灯采用半导体光源的越来越多。这类用途的半导体光源与一般的白灯灯相比有下列优点：使用寿命比白炽灯长，功率消耗比白炽灯低得多。信号灯经常成为复杂信号系统的一部分，带交通灯的交通控制系统就是一个例子。要广泛发扬半导体光源的上述优点，就需要使这种电路系统提供对现有信号系统改型的可能性。
现行信号系统中的信号灯经常是借助固态继电器控制的，继电器和信号灯的状态检验在所连接电路系统的接线端子上进行。固态继电器通常有这样的特点：继电器在不导通状态下会漏电。采用半导体光源往往会使状态检验结果不准确。这是采用半导体光源的一个问题。
发明内容
本发明的目的是提供解决上述问题的措施。
根据本发明，是给电路系统再配备一个自行调节的导流网络而达到上述目的的。
本发明的一个方面，一种电路系统，用以控制半导体光源的工作过程，配备有：
接线端子，用以与给所述电路系统提供电压的控制单元连接；
输入滤波装置；
一个变换器，包括一个控制电路；和
输出端子，用以与所述半导体光源连接；
其特征在于，该电路系统还配备有自调节导流网络，该自调节导流网络用以在所述控制单元处于其非导通状态时，排除在所述控制单元中出现的漏泄电流。
本发明的另一个方面，一种信号灯，配备有一个里面装有半导体光源的外壳，其特征在于，信号灯配备有上述的电路系统。
有了这种自行调节的导流网络，就可以排除控制单元、例如固态继电器在不导通状态下出现的漏泄电流，从而保持电路系统各接线端子的电压在得出状态检验正确结果所需要的电平以下。这样，以简单而有效的方式就可以使电路系统在其接线端子的性能可与白炽灯的性能高度媲美。
白炽灯这方面性能的一个重要特点是，灯在熄灯状态下的阻抗较低，从而在消除流过白炽灯的漏泄电流之后仅仅使控制电路各接线端子的电压较低。
本发明的电路系统最好有一个去激励装置，供变换器接通时使自行调节导流网络去激励，这样做的好处是消除了不必要的功率消耗。在本发明电路系统的一个最佳实施例中，给电路系统配备了一个稳压低压电源，自行调节导流网络在受激励状态下形成所述稳压低压电源的电源。这个实施例的主要优点是，稳压低压电源在变换器借助于控制单元(例如固态继电器)接通进入导通状态时极其快速地提供所需要的低电压，这是因为自行调节导流网络已受激励的缘故。
在本申请文本中，“变换器”一词理解为是指将控制电路所提供的电能转换成控制半导体光源过程所需要的电流-电压组合的电路，为此最好采用配备有一个或几个半导体开关的开关式电源。鉴于现代的开关式电源通常是直流-直流变换器，因而输入滤波器装置最好也能配备整流装置，这实质上是众所周知的。
信号灯最好配备一个装有本发明半导体光源的外壳，最好也配备本发明的电路系统，这样就大大提高了用信号灯作为现行信号灯改型单元的可能性。当电路系统配备有与信号灯外壳合成一个整体的外壳时，作为改型的信号灯使用的可能性就最佳。
附图说明
下面参阅本发明电路系统一个实施例的附图更详细地说明本发明的上述和其它方面。附图中：
图1是电路系统示意图；
图2是更详细的自行调节导流网络图；
图3是稳压低压电源的电路图。
具体实施方式
图1中，A和B是连接例如配备有固态继电器的控制单元VB的接线端子。编号I表示输入滤波装置，III表示带控制电路的变换器。C和D是接半导体光源LB的输出端子。II表示自行调节的导流网络。输入滤波装置I设有正极+和负极-。
图2更详细地示出了自行调节的导流网络II，该网络包括一个MOSFET(金属氧化物半导体场效应晶体管)1，其中g为栅极，d为漏极，s为源极。MOSFET1的栅极g经电阻器R2接电气上与输入滤波装置I并联连接的分压网络，它包括由电阻器R1和电容器C1组成的串联电路。电容器C1与齐纳二极管Z1并联连接。MOSFET1的漏极d直接接输入滤波装置I的正极+。源极s经电阻器R11和齐纳二极管Z11组成的串联电路接输入滤波装置I的负极-。E表示自行调节导流网络连接构成电路系统一部分的稳压低电源的连接点。自行调节导流网络II在受激状态下通过连接点E成为稳定低压电源的电源。
图2还示出了装在电路系统中的装置IV，供变换器III导通时使自行调节导流网络去激励用。为此开关SR一方面接电阻器R1与电容器C1的公共连接点，另一方面接辅助电压V-、开关SR的控制极通过一个分压器接正极+。当控制单元接通，即为接通变流器III而接通时，正极+处的电压会上升，这时开关SR导通，MOSFET1截止，从而使自行调节导流网络去激励。
在所示的实施例中，辅助电压V-最好由与流经所连接的半导体光源的电流成比例的信号调制。这样做的好处是可以避免每次所连接的控制部分的电压过零时起动变换器III接通状态下的自行调节导流网络。这在另一个实施例中是这样实现的：例如使装置IV连接变换器的输出端C或连接低压电源的端子F，此外辅助电压V-的电压不变，例如负极的电压。此外，还有一种有益的方式是在变换器接通时由装置IV根据半导体光源提供的电流使自行调节导流网络去激励，这样就不致在控制部分的电压过零时激励导流网络。
虽然图中自行调节导流网络的去激励装置是作为独立的装置IV标出的，但最好还是使其成为变换器III的控制电路的一部分。图3示出了构成电路系统一部分的稳压低压电源单元V。稳压低压电源V的输入端接自行调节导流网络II的连接点E，从而在受激状态下成了稳压低压电源的电源。连接点E经二极管D1和由电阻器R3和电容器C2组成的电路连接集成电路(IC)100的插脚101。IC100的插脚103形成载有可用接插件F提取的稳定低电压的输出端插脚。插脚103经电容器C3接地。IC100的插脚102也接地。
在上述本发明的电路系统实施例的实际应用中，这种电路系统适宜连接接通状态下的供电电压最低为80伏60赫、最高为135伏60赫的控制单元，因而适宜控制包括下列部分的半导体光源的工作过程：3×6LED(发光二极管)矩阵，LED为Hewlett-Packard公司出品，在250毫安和25℃环境温度下规定的正向电压VF在2伏和3伏之间。变换器处于受激状态时，在输入滤波装置正极+上出现有效值最低80伏最高135伏的经整流的电压。自行调节导流网络II的MOSFET1为IRF820型(IRF公司出品)。齐纳二极管Z1的齐纳电压为15伏，齐纳二极管Z11的齐的电压则为5.6伏。电容器C1的电容值为330皮法，电阻器R1、R2和R3的电阻值分别为240千欧、10千欧和220千欧。当控制单元断开时，MOSFET1中会有31毫安的最大电流流过，与此相应，在输入端子A出现最高均方根值10伏的电压，这相当于控制单元在断开状态下正好使其状态检验能得出正确结果的最高容许电压级。
开关SR为BC×70型(Philips公司出品)，IC100为78LU9型(National半导体制品公司出品)，能提供9伏稳定低压，精确度1％。电阻器R3的电阻值为10欧，电容器C2和C3的电容值各为1微法。
电路系统配备的外壳形成信号灯的一部分，信号灯配备有一个带半导体光源的外壳，同时电路系统的外壳与信号灯的外壳合成一个整体。所述实施例特别适用作交通控制系统的交通灯。

Claims (5)

1.一种电路系统，用以控制半导体光源的工作过程，配备有：
接线端子(A、B)，用以与给所述电路系统提供电压的控制单元(VB)连接；
输入滤波装置(I)；
一个变换器(III)，包括一个控制电路；和
输出端子(C、D)，用以与所述半导体光源(LB)连接；
其特征在于，该电路系统还配备有自调节导流网络(II)，该自调节导流网络用以在所述控制单元处于其不导通状态时，排除在所述控制单元中出现的漏泄电流。
2.如权利要求1所述的电路系统，其特征在于，电路系统包括一个去激励装置，供变换器接通时使自行调节导流网络去激励。
3.如权利要求1或2所述的电路系统，其特征在于，电路系统配备有稳压低压电源，且自行调节导流网络在受激状态下成为所述稳压低压电源的电源。
4.一种信号灯，配备有一个里面装有半导体光源的外壳，其特征在于，信号灯配备有以上任一权利要求所述的电路系统。
5.如权利要求4所述的信号灯，其特征在于，电路系统配备的外壳与信号灯的外壳合成一个整体。
CNB988014033A 1997-08-01 1998-07-16 电路系统和配备有这种电路系统的信号灯 Expired - Lifetime CN1192682C (zh)

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PCT/IB1998/001084 WO1999007187A2 (en) 1997-08-01 1998-07-16 Circuit arrangement, and signalling light provided with the circuit arrangement

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JP4159119B2 (ja) 2008-10-01
DE69826825D1 (de) 2004-11-11
US6013988A (en) 2000-01-11
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