A control device and method for a capacitive lamp
A technology for control devices and lamps, which is applied in the direction of lighting devices, semiconductor lamps, electroluminescent light sources, etc., can solve the problems of MOSFET dimming circuit complexity, energy storage capacitor impact, and difficult control, and achieve the goal of avoiding dimming flicker Effect
Active Publication Date: 2019-06-21
广州河东科技有限公司
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Problems solved by technology
In addition, the MOSFET dimming circuit is more suitable for capacitive load dimming, especially high-power load dimming, than the thyristor. However, because the MOSFET dimming circuit is relatively complex, the control is difficult to stabilize, and it is affected by the impact of the energy storage capacitor, the MOS tube dimming The method has not been developed, and thyristor dimmers still occupy most of the dimming system market
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[0048] Such as figure 1 As shown, a control device for a capacitive lamp includes a control component, an AC transformer circuit module, a first MOS transistor, a first crystal diode, a second MOS transistor, and a second crystal diode;
[0049] The input L end of the AC transformation circuit module is electrically connected to the mains live wire end, the input N end of the AC transformation circuit module is electrically connected to the mains neutral wire end, and the first output of the AC transformation circuit module The L end is electrically connected to the input pole of the first MOS transistor (such as the D pole of the N-channel MOS transistor), and the output pole of the first MOS transistor (such as the S pole of the N-channel MOS transistor) is connected to the input pole of the second MOS transistor. Pole (such as the D pole of the N-channel MOS tube) is electrically connected, and the output pole of the second MOS tube (such as the S pole of the N-channel MOS ...
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The invention relates to a control device for a capacitive lamp, comprising an AC transformer circuit module, a zero-crossing detection circuit module, a control circuit module, a first MOS tube, a first crystal diode, a protection circuit module, a second MOS tube, a second A crystal diode, a control circuit module, and a rectifying and filtering circuit module. The present invention also relates to a control method for a capacitive lamp, including step S1-8. Step S1 is to perform zero-crossing detection for the zero-crossing detection circuit module and transmit the detection signal to the control For the circuit module, step S2 is to perform real-time matching calculation with the zero-crossing detection information after the control circuit module receives the external control command. The invention discloses a control device and a method for a capacitive lamp, so that the dimming mode of the MOS tube is not affected by the size of the input capacitor of the lamp, so as to avoid dimming flickering caused by a protection device malfunction caused by residual input capacitor voltage. Dimming cannot be performed, and the circuit may even be damaged due to the discharge impact of the input energy storage capacitor.
Description
technical field [0001] The invention relates to the field of lighting electronic control, in particular to a control device and method for a capacitive lighting fixture. Background technique [0002] Today's LED lighting problems are mostly caused by the mismatch between the control system and the light source electrical appliances. This has become a common problem in the industry. At the same time, the diversification of LEDs also poses higher challenges to the control system. Since the light-emitting principle of LED is different from that of traditional lighting, it relies on P-N junction to emit light. LED light sources with the same power use different chips and different current and voltage parameters, so their internal wiring structures and circuit distributions are also different, resulting in various productions. Manufacturers' light sources have different requirements for dimming drivers. If the control system and lighting equipment are not matched, it may cause t...
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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00Y02B20/30
Inventor 曾义
Owner 广州河东科技有限公司