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Control method and control device based on cutdown modulation of power signals

A power signal and control method technology, applied in the direction of electrical signal transmission systems, signal transmission systems, instruments, etc., can solve the problems of increased hardware costs, single carrier signal, and lack of scalability, and achieve good stability and high signal strength , good expansibility effect

Inactive Publication Date: 2015-04-22
陈幼珠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is mostly used in silicon controlled rectifiers, and has quite mature circuits and solutions, but it has its obvious defects: the carrier signal is single (phase), and it does not have scalability, that is, if the original control module can only control one parameter , at the same time, it is necessary to expand the number of parameters it controls, which is basically impossible or requires more hardware costs
Moreover, the control module used in this type of phase modulation method has complex circuits, high cost, and poor interchangeability between control modules from different manufacturers.

Method used

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  • Control method and control device based on cutdown modulation of power signals
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  • Control method and control device based on cutdown modulation of power signals

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Embodiment 1

[0049] combine Figure 1 to Figure 4 , Embodiment 1 of the present invention is described as follows:

[0050] A control method based on power signal reduction modulation, which includes several main steps:

[0051] Waveform modulation step 1: Use a waveform modulation module 13 to modulate the AC power signal transmitted on one power line: the power line is in the form of double-ended, and is connected to the control module 10 from the power signal end 11, and the gate of the switching device 14 Next, the signal can be output from the modulated power signal terminal 12 after being processed by the waveform modulation module 13, and the output signal is as follows image 3 As shown, on the basis of the original power signal, the positive half cycle is reduced by the same amount, and has a reduction region 50 compared with the original waveform. Therefore, the entire waveform must have a continuous zero potential region G in the positive half cycle.

[0052] Carrier transmiss...

Embodiment 2

[0058] Such as Figure 5 and Figure 6 A schematic diagram of Embodiment 2 of the present invention is shown.

[0059] The control module 10 part of the present embodiment sees Figure 5 , in the control module 10, there are three waveform modulation modules 13, which respectively use Zener diodes WD1, WD2, and reverse series connection of WD3 and WD4. The switching device 14 uses a single-pole multi-throw switch K1 to enable different waveform modulation modules 13 to be connected in a parallel switching mode, so that they can be connected in series between the power signal terminal 11 and the modulation power signal terminal 12 .

[0060] Correspondingly, in Figure 6 shows three different waveforms from the modulated power signal terminal 12: the positive half cycle of the A waveform has an equal reduction domain 50, corresponding to the waveform modulation module 13 where K1 gates WD1, and the B waveform that is cut off in the second half cycle corresponds to WD2, and ...

Embodiment 3

[0062] Such as Figure 7 and Figure 8 As shown, the load part of the third embodiment can be the same as that of the second embodiment, the difference is that there are only two waveform modulation modules 13 in the control module 10, and only two Zener diodes WD4 and WD5 are needed in total. In particular, the waveform modulation module 13 is a linear combination in the form of series, which is different from Figure 5 The second embodiment shown is in the form of parallel connection, and the switching device 14 used in the third embodiment includes two single-pole double-throw switches K2 and K3, through the mixed gate of K2 and K3, it can also be output at the modulation power signal terminal 12 Figure 6 The three waveforms shown can realize the same number of states; in particular, although there is one switch more than the switching device 14 of the second embodiment, the switching device 14 of this embodiment does not need a special switch, and the general single-pole...

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Abstract

The invention discloses a control method and a control device based on cutdown modulation of power signals. The control method is characterized by including steps of waveform modulation, carrier transmission and drive demodulation. In the waveform step, a one-way voltage-stabilizing part in a waveform modulation module is stranded in a current loop, the power signals of alternating current transmitted on a power cord are modulated, and a certain section of waveform amplitude of each cycle is cut down to acquire a modulation power signal. In the carrier transmission step, the modulation power signal is transmitted to a terminal along the power cord. In the drive demodulation step, amplitude detection is performed to the modulation power signal by a demodulation module, corresponding modulation information of the amplitude on a cutdown portion is read, and work state of a load in the terminal is set according to the modulation information. According to the scheme, simple parallel connection and series connection can be used to expand a modulation module in a control module, expansibility is high, and cost is low.

Description

technical field [0001] The present invention is a control method using power signal carrier, specifically a control method realized by using power signal reduction modulation, and a device realized by using this method. Background technique [0002] In the use of a variety of AC power equipment, it is necessary to adjust and control them so that different working states can be achieved under the same power supply. The more straightforward way is to set an externally adjustable control module and an independent control circuit. This type of method cannot avoid the connection wires necessary for the control circuit, which inevitably increases the cost of the circuit, especially when the control module is far away from the electrical equipment. For example, dimming lamps commonly used in homes, etc., these additional circuit costs are usually not popularized. [0003] Another usage is to use a thyristor chopping wave circuit, but this circuit is usually suitable for resistive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08C19/00
Inventor 陈幼珠
Owner 陈幼珠