A LED wireless control system and control method compatible with phase-cut dimming

Abstract

The invention discloses a LED wireless control system and control method compatible with phase-cut dimming. The control system includes a phase-cut dimming unit, a wireless control unit, and a power supply control unit. The phase-cut dimming unit is respectively connected with the wireless control unit and the wireless control unit. The power supply control unit is connected to the wireless control unit; the phase-cutting dimming unit is used to adjust the output current through a phase-cutting signal, a PWM signal or an analog signal; the wireless control unit is used to The wireless signal is converted into a PWM signal or an analog signal to the phase-cut dimming unit; the power supply control unit is used to obtain energy from the phase-cut dimming unit to provide continuous power for the wireless control unit. The LED control power supply of the present invention can be directly installed in the existing phase-cut dimming circuit without rewiring, and can use wireless control functions to realize on, off, dimming, and temperature adjustment while being compatible with the phase-cut dimmer.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to an LED wireless control system and control method compatible with phase-cut dimming. Background technique [0002] Phase-cut dimming: According to the circuit implementation method, it can be divided into two control methods: thyristor front-cut phase dimming and transistor post-cut phase dimming (also known as leading edge or trailing edge, leading or trailing cutting phase dimming), Thyristor front-cut phase dimming generally uses a half-controlled device thyristor as a switching chopper device, and trailing-edge phase-controlled dimming generally uses a fully-controlled switching device (such as IGBT, MOSFET or bipolar transistor BJT) as a switch chopper device. The thyristor front-cut phase dimming circuit has simple structure, low cost and convenient use, but has large EMI and EMC interference, and the circuit power factor (PF) value is low. SCR dimmers are usually used to dim ...

AI Technical Summary

Problems solved by technology

Similarly, the non-sinusoidal voltage waveform increases the total harmonic distortion coefficient of the circuit, which will generate serious interference signals

In the line where the phase-cut dimmer has been installed, the wireless control LED light cannot be used directly. If you need to use the wireless control LED light, you need to re-wire

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