Single-firing-wire electronic switch circuit

Abstract

The invention relates to a single-firing-wire electronic switch circuit. The single-firing-wire electronic switch circuit comprises a relay, a power supply circuit, a switch tube unit and a drive andcontrol unit, wherein the relay adopts a magnetic latching relay, the power supply circuit is composed of a micro-power-consumption wide-voltage power supply module circuit and a power switch circuit,and an EMI filter circuit is additionally arranged on the switch tube unit on the basis of a switch tube; and the drive and control unit adopts a low-power-consumption chip module circuit to drive the switch tube and the relay. A single-firing-wire electronic switch suitable for large and small power loads and capable of passing electromagnetic compatibility conduction authentication and adoptinghigh-current wireless communication protocols such as Zigbbee is realized.

Description

technical field [0001] The invention relates to an electronic switch circuit, in particular to a single live wire electronic switch circuit, which belongs to the field of smart home. Background technique [0002] At present, the single live wire electronic switch on the market is generally not suitable for any load like the zero live wire switch. Most of the existing single live wire electronic switch circuits on the market use thyristors and ordinary relays as drive components to drive the load. The following features: [0003] 1. Thyristor method: Using thyristor as an electronic switch to turn on and off the load is the most commonly used method for single live wire electronic switches at present. Its advantages are: long life of electronic switches, simple drive control circuit, and low manufacturing cost. Low, can control various load types (resistive, capacitive, inductive, etc.), the disadvantage is: due to the heat dissipation required by the thyristor, the power w...

AI Technical Summary

Problems solved by technology

[0003] 1. Thyristor method: Using thyristor as an electronic switch to turn on and off the load is the most commonly used method for single live wire electronic switches at present. Its advantages are: long life of electronic switches, simple drive control circuit, and low manufacturing cost. Low, can control various load types (resistive, capacitive, inductive, etc.), the disadvantage is: due to the heat dissipation required by the thyristor, the power with the load is limited (generally below 200W), in addition, due to the SCRs need to frequently switch loads at non-zero crossings and generate large harmonics, which makes it difficult to pass certification in terms of electromagnetic compatibility;

[0004] 2. Relay mode: the mechanical contact of the relay is used to switch on and off the load, which is suitable for high-power lamps or electrical appliances. The high-power single live wire electronic switch on the market generally uses ordinary electromagnetic relays. Low, the disadvantage is: due to the large driving current of its action coil, even if it can operate most of the lamps after some low-power optimization, it still cannot be connected to any lamp without flickering like a zero-fire switch, and there are still polarities. Some special lamps flicker when turned off (such as some extremely low-current driven high-efficiency low-power energy-saving lamps or LED lamps), which cannot meet the needs of the pursuit of perfect mid-to-high-end smart switches

[0005] In addition, the current single live wire electronic switch products on the market have a complex power supply circuit structure, low efficiency, insufficient power supply to the back-end circuit, and cannot be perfectly and reliably connected to Zigbee (with flexible networking, reliable communication, strong security, good scalability, No need for wiring and other advantages) wireless module (Zigbee module itself generally consumes between 20 and 40 mA when transmitting and receiving)

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