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公开(公告)号：US20190254133A1
公开(公告)日：2019-08-15
申请号：US16396080
申请日：2019-04-26
发明人： Jean-Paul EGGERMONT
CPC分类号： H05B33/0815 , H02M1/088 , H02M1/44 , H02M3/158 , H02M2001/0009 , H02M2001/0025 , H05B37/02
摘要： Apparatuses, systems and methods for regulating the output currents of a power supply at a target output current include a buck converter module operably connected to a power source and a load. A first switch couples the power source to the buck converter module during a first period of a given operating cycle, while the buck converter module stores and provides electrical power to the load. During a second period, a second switch may discharge, the electrical power stored during the first period. A current sensor senses the currents during at least one of the first period and the second period and, over the operating cycle, the switching times are adjusted so the average output current equals the target output current. Adjustments to the first and second period durations result in maximum and a minimum currents symmetrically disposed about the average current provided to the load during the operating cycle.
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公开(公告)号：US20190254132A1
公开(公告)日：2019-08-15
申请号：US16326705
申请日：2017-03-29
发明人： Qinggang HE
CPC分类号： H05B33/0845 , H05B33/0809 , H05B33/0815 , H05B33/0854 , H05B37/0209 , H05B37/0245 , H05B37/0254 , H05B37/0272
摘要： The present disclosure discloses a control system. The control system may include a master controller and one or more subordinate controllers. The master controller may include a first switch, a first input port, and a first output port. The first input port may be connected to the first output port, and the first output port may be connected to an electric device. The subordinate controller may be electrically connected to the master controller. The subordinate controller may include a second switch, a third switch, a second input port, and a second output port connected to a hot wire. The third switch may control on/off statuses of the first switch and the second switch. The second switch and the third switch may be connected between the second input port and the second output port. The second switch may be may be connected in parallel with the third switch.
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公开(公告)号：US20190254131A1
公开(公告)日：2019-08-15
申请号：US16269608
申请日：2019-02-07
申请人： Hubbell Incorporated
IPC分类号： H05B33/08 , G01R19/165
CPC分类号： H05B33/0815 , G01R19/16528 , H05B33/0845 , H05B33/086
摘要： A voltage transducer for a lighting system can include an input operable to receive an alternating current input power. The voltage transducer can include a current sink circuit operable to provide a current sinking output. The voltage transducer can include one or more control devices configured to determine a magnitude associated with the alternating current input power. The one or more control devices can be further configured to control the current sink circuit to adjust the current sinking output based, at least in part, on the magnitude of the alternating current input power.
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公开(公告)号：US20190222125A1
公开(公告)日：2019-07-18
申请号：US16242935
申请日：2019-01-08
发明人： Marcus SCHAEMANN , Tiam Poh Lau
CPC分类号： H02M3/33523 , H02M1/08 , H05B33/0815 , H05B33/0845
摘要： Power converter controllers, power converters and corresponding methods are provided. A power converter controller may have a first input for receiving an indication of an output of the power converter and a second input operative to receive a supply voltage. A control circuit of the power converter controller (10) controls a primary side switch of the power converter based on both the supply voltage and the indication.
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公开(公告)号：US20190212764A1
公开(公告)日：2019-07-11
申请号：US16356366
申请日：2019-03-18
CPC分类号： G05F5/00 , H02M5/297 , H05B33/0809 , H05B33/0815 , H05B39/048 , Y02B20/346
摘要： A load control device may control the amount of power provided to an electrical load utilizing a phase control signal that operates in a reverse phase control mode, a center phase control mode, and a forward phase control mode. A load control device may be configured to determine that the electrical load should be operated via a phase control signal operating in a forward phase-control mode. After determining to operate the electrical load via the phase control signal in the forward phase-control mode, the load control device may provide the phase control signal in a reverse phase-control mode for a predetermined period of time to the electrical load, for example, to charge a bus capacitor of the electrical load. Subsequently, the load control device may be configured to switch the phase control signal to the forward phase-control mode and provide the phase control signal in the forward phase-control mode to the electrical load.
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6.发明申请公开(公告)号：US20190191510A1
公开(公告)日：2019-06-20
申请号：US16284761
申请日：2019-02-25
发明人： Isaac Cohen
CPC分类号： H05B33/0815 , G01R19/003 , G01R19/0038 , H02M1/08 , H02M1/088 , H02M3/156 , H02M3/1582 , H02M3/33507 , H02M3/33546 , H02M2001/0006 , H02M2001/0009 , H05B33/083 , H05B33/0845
摘要： In a power converter, a circuit determines an average value of an inaccessible current from an average value of an accessible current and a value of the operating duty cycle of the converter. A method of measuring an average value of an inaccessible current from a measured value of a current, in a power converter, by a duty cycle of a pulse width modulation (PWM) signal, representing a duty cycle of the power converter. Coupling a voltage representing the measured value to an input of a low pass filter during a time period (D) and coupling the input of the low pass filter to a reference voltage during a time period (1−D).
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公开(公告)号：US20190191507A1
公开(公告)日：2019-06-20
申请号：US16224266
申请日：2018-12-18
发明人： Qiming Wang
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/0845
摘要： An LED lamp with constant current dimming drive circuit based on PWM input includes a PWM variable power supply input end, a PWM matching circuit, a voltage rectifying circuit, a DC-DC constant current output circuit and an LED lamp, and the voltage signal of the PWM variable power supply input end is provided by the PWM voltage output power supply, and the PWM variable power supply input end is respectively connected with the PWM matching circuit and the voltage rectifying circuit, and the PWM matching circuit is connected with the enable end of the DC-DC constant current output circuit, and the voltage rectifying circuit is connected to the power supply end of the DC-DC constant current output circuit, and the voltage of the voltage rectifying circuit changes according to the duty ratio of the voltage of the PWM variable power supply input end, and the voltage of the PWM variable power supply input end passes through the voltage dividing resistor of PWM matching circuit and output PWM control signal, and PWM control signal realizes non-stroboscopic adjustment LED lamp through the DC-DC constant current output circuit.
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公开(公告)号：US20190186699A1
公开(公告)日：2019-06-20
申请号：US16263020
申请日：2019-01-31
发明人： Aiming Xiong , Xintong Liu
IPC分类号： F21K9/278 , F21V23/02 , F21K9/27 , F21V29/70 , F21V23/00 , H05B33/08 , F21V3/06 , F21K9/275 , F21K9/272 , F21V25/02 , F21V15/015
CPC分类号： F21K9/278 , F21K9/27 , F21K9/272 , F21K9/275 , F21V3/061 , F21V15/015 , F21V23/003 , F21V23/005 , F21V23/02 , F21V23/023 , F21V25/02 , F21V29/70 , F21V29/83 , F21Y2103/10 , F21Y2115/10 , H05B33/0803 , H05B33/0815 , H05B33/0845 , H05B33/0857 , H05B33/0887
摘要： A light-emitting diode (LED) tube lamp adapted to install on a lamp socket and configured to emit light when receiving an external driving signal without the external driving signal passing through or being output from a ballast includes a lamp tube, two end caps, each having at least one external connection terminal, a rectifying circuit, for rectifying the external driving signal to produce a rectified signal; a filtering circuit, for filtering the rectified signal to produce a filtered signal; an LED module, disposed on a power loop of the LED tube lamp, coupled to the filtering circuit, and configured for emitting light; a driving circuit coupled between the rectifying circuit and the LED module, and configured to drive the LED module; a mode determination circuit coupled to the rectifying circuit and the driving circuit and configured to detect the voltage level of the rectified signal; a switch circuit; and an installation detection circuit coupled to the mode determination circuit, the switch circuit, and the rectifying circuit; and configured to detect an installation state between the LED tube lamp and a lamp socket based on the voltage level of the rectified signal detected by the mode determination circuit.
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公开(公告)号：US20190159309A1
公开(公告)日：2019-05-23
申请号：US16155832
申请日：2018-10-09
发明人： TAKAYUKI SHIMIZU , YOSHIKI IKUTA , HIDEKI SATO , TAKUMA HIRAMATSU
CPC分类号： H05B33/0815 , G09G3/32 , H05B33/0827 , H05B33/0851 , H05B33/0854 , H05B37/02 , H05B37/0227
摘要： There is provided a VCSEL drive circuit that causes a VCSEL to emit pulsed light in a light emission period, including a drive adjustment unit that adjust a first voltage which is a voltage of drains of a PMOS transistor and an NMOS transistor in a constant current circuit and a second voltage which is a voltage of a drain of an NMOS transistor that drives the VCSEL to be the same voltage in a pre-light emission period before the light emission period.
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公开(公告)号：US20190141808A1
公开(公告)日：2019-05-09
申请号：US16163268
申请日：2018-10-17
发明人： Xuhong Ma
IPC分类号： H05B33/08
CPC分类号： H05B33/0845 , H05B33/0815 , H05B33/0818 , Y02B20/346
摘要： A dimming system for LED lamps, comprising a DC/DC converter, a dimming signal input module, a brightness value conversion module electrically connected to the dimming signal input module, and a dimming signal switching threshold setting module, a first signal output module, and a second signal output module. The dimming signal input module is configured to input a dimming signal. And when the brightness value is greater than or equal to the dimming signal switching threshold, the value of the amplitude dimming voltage output by the first signal output module is equal to the dimming signal switching threshold and the second signal output module outputs one PWM signal. The PWM signal modulates the amplitude dimming voltage having a magnitude equal to the dimming signal switching threshold to adjust the output of the DC/DC converter.
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