Intelligent switching circuit
An intelligent switch and circuit technology, applied in the field of electronics, can solve the problems of increased loss and heat of the thyristor Q11, affecting the operation of the circuit, etc.
Active Publication Date: 2013-03-27
SHENZHEN BOJUXING IND DEV
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Problems solved by technology
However, when the power of the load L1 increases, the current flowing through the thyristor Q11 will increase, so that the loss and heat of the thyristor Q11 will increase. In addition, when the load L1 of the circuit increases, the thyristor Q11 is not turned on at the zero crossing point, which will generate strong switching interference, which will affect the circuit operation
Method used
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[0025] Such as image 3 As shown, in the logic diagram of the first embodiment of the intelligent switch and load circuit of the present invention, the intelligent switch and load circuit includes a load and an intelligent switch circuit connected in series with the load, and the intelligent switch circuit is used to control the power on and off of the load , the intelligent switch circuit includes a first power supply part 100, a second power supply part 200, a power management part 300, a control part 400 and a switch tube part 500, wherein the first power supply part 100 is used for power-on or sampled load current When the current value is not greater than the preset current value, the power supply management part 300 supplies power to the control part 500; the second power supply part 200 is used to sample the load current after the load is powered on, and output it to the control part 400, and when the sampled load current is greater than the preset When the current valu...
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The invention relates to an intelligent switching circuit, which comprises a first power part, a second power part and a control part, wherein the first power part is used for supplying power to the control part by a power management part during electrification or when a sampled load current is smaller than or equal to a predetermined current value; the second power part is used for sampling the load current after a load is switched on, outputting the load current to the control part and supplying the power to the control part by the power management part when the sampled load current is greater than the predetermined current value; and the control part is used for driving a switching tube part to be correspondingly switched on or off according to a received switch-on or switch-off signal, and determining that the control part is supplied with the power by the first power part or the second power part according to the sampled load current. By adoption of the technical scheme of the invention, when the sampled current is greater than the predetermined current value, current energy which is sampled by the second power part is converted into electric energy which is then supplied to the control part, so the heating loss of the switching tube part cannot be quite high, and the circuit can well operate.
Description
technical field [0001] The present invention relates to electronic technology, more specifically, relates to an intelligent switch circuit. Background technique [0002] Currently, wall switches are widely used to turn on and off loads such as lights and ceiling fans. Such as figure 1 As shown, the wall switches on the market are generally single-wire controlled. The switch S11 and the load L1 are connected in series between the live wire L and the neutral wire N. This kind of switch saves the most wiring, but it is not suitable for smart switches. Such as figure 2 In the circuit diagram of the smart switch in the prior art shown, the DC power supply U11 supplies power to the single-chip microcomputer U12 when the power is turned on. When the silicon-controlled Q11 is turned on, it will generate a voltage of 30V-50V, and use this voltage to power the single-chip microcomputer U12. However, when the power of the load L1 increases, the current flowing through the thyristo...
Claims
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IPC IPC(8): H03K17/16H03K17/78
Inventor 涂柏生阳秋明
Owner SHENZHEN BOJUXING IND DEV