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Alternating voltage zero-crossing detection method based on alternating voltage detection circuit

A technology of AC voltage and detection circuit, which is applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve the problems of increasing hardware cost and high cost, and achieve the effect of reducing cost and improving cooking efficiency and reliability

Active Publication Date: 2019-08-09
JOYOUNG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the prior art, the zero-crossing detection circuit needs to be specially designed, so the cost is relatively high, especially the hardware cost will be increased

Method used

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  • Alternating voltage zero-crossing detection method based on alternating voltage detection circuit
  • Alternating voltage zero-crossing detection method based on alternating voltage detection circuit
  • Alternating voltage zero-crossing detection method based on alternating voltage detection circuit

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Embodiment Construction

[0040] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0041]In practical applications, household appliances connected to AC power (generally referred to as mains power in China, that is, 50Hz, 220V AC power) usually have an AC voltage detection circuit, which is used to detect the voltage value of the AC voltage signal. Specifically, the AC voltage detection circuit rectifies, divides, and filters the in...

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Abstract

The application discloses an alternating voltage zero-crossing detection method based on an alternating voltage detection circuit, wherein the alternating voltage detection circuit is used for rectifying, dividing and filtering an alternating voltage signal and acquiring a voltage acquisition signal with a half-wave waveform. The method comprises the following steps: detecting specific sub-waveforms in a single half-wave in a half-wave waveform by periodically collecting voltage acquisition signals; obtaining the compensation delay of a specific sub-waveforms; and judging the zero-crossing point of the alternating voltage signal according to the specific sub-waveforms and the compensation delay. According to the invention, the zero-crossing detection circuit is not specially designed, thealternating voltage detection circuit is directly utilized, and the alternating voltage zero-crossing detection is carried out by combining a software algorithm, so that the cost can be reduced, and the zero-crossing point can be accurately judged, for example, the alternating voltage zero-crossing detection method can be applied to a cooking appliance. According to the zero-crossing detection result, the heating power of the cooking appliance can be further controlled to improve the cooking efficiency and reliability of the cooking appliance.

Description

technical field [0001] The present application relates to the technical field of AC electric control, in particular to an AC voltage zero-crossing detection method based on an AC voltage detection circuit, as well as a corresponding cooking appliance and a computer-readable storage medium. Background technique [0002] In the field of home appliances, relays and thyristors are mostly used to control electric heating and electric high-power loads. The life of relays and thyristors greatly affects the life of the whole machine. Taking an AC relay as an example, when the relay contacts are closed or disconnected at the peak of the AC current, arc sparks are prone to occur, resulting in a greatly reduced contact life. If the relay operates near the zero-crossing point of the AC voltage, the life of the relay can be effectively extended. [0003] In the prior art, a zero-crossing detection circuit needs to be specially designed to detect the zero-crossing point of the AC voltage....

Claims

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Application Information

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IPC IPC(8): G01R19/175
CPCG01R19/175
Inventor 朱泽春周建东马文杰
Owner JOYOUNG CO LTD
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