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    • 12. 发明授权
    • Driver for a gas discharge lamp
    • 用于气体放电灯的驱动器
    • US07218066B2
    • 2007-05-15
    • US10521865
    • 2003-07-01
    • Dolf Henricus Jozef Van Casteren
    • Dolf Henricus Jozef Van Casteren
    • H05B37/02
    • H05B41/2828Y10S315/07
    • Driver (150) for a gas discharge lamp (9) comprises: an arrangement of two MOSFET switches (61, 62) connected in series between two input terminals (51a, 52b); an inductor (73) connected in series with said lamp (9), this series arrangement being coupled to a node (P) between said two switches; a control unit (180) providing control signals (S1, S2) to said two switches. During a first commutation interval (41), a lamp circuit current (ILC) has only a first direction while during a second commutation interval (42) said lamp circuit current has only an opposite direction. In each commutation interval (41, 42), during a first operational phase (43) said lamp circuit current has a continuously increasing level while during a second operational phase (44) said lamp circuit current has a continuously decreasing level. The control unit (180) is designed to generate its control signals (S1, S2) such that said two switches are always, switched substantially simultaneously in counter-phase. The mosfets are used in reverse conduction m node also, to avoid body diode conduction (synchronous rectification).
    • 用于气体放电灯(9)的驱动器(150)包括:串联连接在两个输入端子(51a,52b)之间的两个MOSFET开关(61,62)的布置; 与所述灯(9)串联连接的电感器(73),所述串联装置耦合到所述两个开关之间的节点(P); 向所述两个开关提供控制信号(S1,S2)的控制单元(180)。 在第一换向间隔(41)期间,灯电路电流(ILC)仅具有第一方向,而在第二换向间隔(42)期间,所述灯电路电流仅具有相反的方向。 在每个换向间隔(41,42)中,在第一操作阶段(43)期间,所述灯电路电流具有连续增加的电平,而在第二操作阶段(44)期间,所述灯电路电流具有连续降低的电平。 控制单元(180)被设计成产生其控制信号(S1,S2),使得所述两个开关总是基本同时地以相位相互切换。 mosfets也用于反向传导m节点,以避免体二极管导通(同步整流)。
    • 18. 发明授权
    • Method and device for driving a gas discharge lamp
    • 用于驱动气体放电灯的方法和装置
    • US08143814B2
    • 2012-03-27
    • US12524381
    • 2008-01-23
    • Dolf Henricus Jozef Van CasterenRobertus Leonardus Tousain
    • Dolf Henricus Jozef Van CasterenRobertus Leonardus Tousain
    • G05F1/00
    • H05B41/2925H05B41/2928
    • A driver (1) for driving a gas discharge lamp (2) comprises:—a current source (3) generating lamp current, having a setpoint input (4) for receiving a setpoint signal;—a controller (10) generating a current setpoint signal (SM);—a controllable noise signal source (20) generating a pseudo random noise signal (SPRNS);—an adder (22) adding the current setpoint signal (SM) from the controller and the pseudo random noise signal (SPRNS) from the noise signal source, and providing the result to the setpoint input of the current source;—measuring means (40) measuring a characteristic lamp response of the lamp in response to the pseudo random noise signal (SPRNS), and providing to the controller a sense signal;—a memory (30) associated with the controller, having stored therein at least one reference signal. The controller compares the measured lamp response with said predetermined reference signal in the memory, and may switch off the lamp.
    • 用于驱动气体放电灯(2)的驱动器(1)包括: - 产生灯电流的电流源(3),具有用于接收设定点信号的设定点输入(4); - 产生电流设定值的控制器(10) 信号(SM); - 产生伪随机噪声信号(SPRNS)的可控噪声信号源(20); - 将来自控制器的当前设定点信号(SM)和伪随机噪声信号(SPRNS)相加的加法器(22) 并且将结果提供给电流源的设定值输入; - 测量装置(40),响应于伪随机噪声信号(SPRNS)测量灯的特征灯响应,并向控制器提供 感测信号; - 与控制器相关联的存储器(30),其中存储有至少一个参考信号。 控制器将测量的灯响应与存储器中的所述预定参考信号进行比较,并且可以关闭灯。
    • 19. 发明授权
    • Circuit and method for driving a load, in particular a high-intensity discharge lamp, and a control unit for said circuit
    • 用于驱动负载的电路和方法,特别是高强度放电灯,以及用于所述电路的控制单元
    • US07456582B2
    • 2008-11-25
    • US10542908
    • 2003-12-16
    • Dolf Henricus Jozef Van Casteren
    • Dolf Henricus Jozef Van Casteren
    • H05B37/02
    • H05B41/2888Y02B20/202
    • Circuit for driving a load, comprising: two input terminals for connection to a source of a supply voltage; a first and a second output terminal for connection to the load; at least one inductor coupled between one of the output terminals and a corresponding connection node; at least one arrangement comprising a switch coupled between one of said input terminals and one of said connection nodes, a diode being connected between said one connection node and the other input terminal; a control unit for controlling said one or more switches; wherein each arrangement and corresponding diode are designed to allow the voltage over the opened switch of said arrangement to return to substantially zero before said switch is closed, the control unit being designed to provide a signal for closing the switch when a substantially zero voltage over said opened switch is detected. Turning the switch on at a substantially zero voltage means that switching losses are greatly reduced, and this without complicating the circuit.
    • 用于驱动负载的电路,包括:用于连接到电源电压源的两个输入端子; 用于连接到负载的第一和第二输出端子; 耦合在所述输出端子之一和相应的连接节点之间的至少一个电感器; 至少一个装置,包括耦合在所述输入端子之一和所述连接节点中的一个之间的开关,二极管连接在所述一个连接节点和另一个输入端子之间; 用于控制所述一个或多个开关的控制单元; 其中每个布置和对应的二极管被设计成允许所述布置的打开的开关上的电压在所述开关闭合之前返回到基本为零,所述控制单元被设计成当所述开关闭合时基本为零电压时提供用于闭合开关的信号 检测到打开的开关。 以大致零电压转动开关意味着开关损耗大大降低,而且不会使电路复杂化。