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Control method, main control device and zero-crossing detection circuit

A technology of zero-crossing detection and main control equipment, which is applied to the program control, measurement of electrical variables, and electrical program control in the sequence/logic controller, which can solve the problems of missed judgment, inability to complete discharge, and misjudgment, etc., and achieve reduction The risk of misjudgment and the effect of improving accuracy

Active Publication Date: 2018-04-20
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the discharge method using a discharge resistor needs to carefully consider the size of the discharge resistor, because the choice of its size has a great influence on the speed of the discharge, and it has a greater dependence on the quality of the discharge resistor. If the discharge resistor If the selection is wrong or damaged, the discharge cannot be completed
The method of judging the magnitude of the voltage change has the risk of misjudgment. On the one hand, there may be misjudgment when there is a surge voltage during the voltage fluctuation process; missed judgment

Method used

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  • Control method, main control device and zero-crossing detection circuit
  • Control method, main control device and zero-crossing detection circuit
  • Control method, main control device and zero-crossing detection circuit

Examples

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Embodiment 1

[0081] figure 1 It is a schematic diagram of the implementation flow of a control method provided by the embodiment of the present invention. The control method in this example is applied to electronic equipment, such as figure 1 As shown, the control method mainly includes the following steps:

[0082] Step 101: Monitor the input voltage signal.

[0083] Here, the input voltage signal can be monitored by the main control device of the electronic device. Wherein, the input voltage signal refers to a signal input to the main control device.

[0084] In an embodiment, the manner of obtaining the input voltage signal includes:

[0085] The rectification device of the electronic device performs full-wave rectification on the incoming AC signal, and rectifies the AC signal into a first electrical signal; wherein, the period of the first electrical signal is the period of the AC signal Half, the waveform corresponding to the first electrical signal is continuous and composed of ...

Embodiment 2

[0144] Figure 4 A schematic diagram of the implementation flow of the main control device controlling the discharge of the preset discharge device provided by the embodiment of the present invention, as shown in Figure 4 As shown, the process includes:

[0145] Step 401: the main control device monitors the input voltage signal;

[0146] Here, the form of the waveform corresponding to the input voltage signal is not limited. For example, the waveform corresponding to the input voltage signal may be the first input voltage waveform diagram as shown in FIG. 2( e ). The waveform corresponding to the input voltage signal may be a second input voltage waveform diagram as shown in FIG. 2( d ).

[0147] Step 402: The main control device judges whether a zero-crossing point occurs within a preset period based on the input voltage signal, and if a zero-crossing point occurs, execute step 403; if no zero-crossing point occurs, execute step 405;

[0148] Step 403: The master control...

Embodiment 3

[0160] An embodiment of the present invention provides a master control device, Figure 5 A schematic diagram of the composition and structure of the main control device provided by the embodiment of the present invention, such as Figure 5 As shown, the main control device includes: a monitoring unit 51, a first judging unit 52, a second judging unit 53, and a control unit 54; wherein,

[0161] The monitoring unit 51 is configured to monitor an input voltage signal;

[0162] The first judging unit 52 is configured to judge whether a zero-crossing point occurs within a preset period based on the input voltage signal, and obtain a first judging result;

[0163] The second judging unit 53 is configured to judge the current state of the electronic device according to the first judging result;

[0164] The control unit 54 is configured to control the preset discharge device in the electronic device to discharge when it is determined that the current state of the electronic devic...

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Abstract

The embodiment of the invention discloses a control method, a master control device and a zero-crossing point detection circuit. The control method applied to an electronic device includes the following steps that: input voltage signals are monitored; whether a zero-crossing point appears in a preset period is judged based on the input voltage signals, so that a first judgment result is obtained;the current state of the electronic device is determined according to the first judgment result; and when it is judged that the current state of the electronic device is a power-off state, a preset discharge component in the electronic device is controlled to perform discharging. With the control method, the master control device and the zero-crossing point detection circuit provided by the technical schemes provided by the embodiments of the invention adopted, the accuracy of zero-crossing detection can be improved, and the electronic device can consume residual power in time.

Description

technical field [0001] The invention relates to the technical field of detection and control, in particular to a control method, a main control device and a zero-crossing detection circuit. Background technique [0002] In various electrical safety standards, there are generally restrictions on the discharge of electrical products, such as the voltage of the residual power within 1 second after the power is unplugged should be less than the preset voltage value. There are mainly two discharge methods in the prior art: one is to use a discharge resistor to discharge; the other is to monitor the change of voltage and judge whether to discharge according to the magnitude of the change. [0003] However, the discharge method using a discharge resistor needs to carefully consider the size of the discharge resistor, because the choice of its size has a great influence on the speed of the discharge, and it has a greater dependence on the quality of the discharge resistor. If the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04G01R19/175
CPCG01R19/175G05B19/04
Inventor 李娟汪钊肖小龙陈伟王彪
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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