Phase loss detection circuit and air conditioner
A phase loss detection and circuit technology, which is applied in the field of phase loss detection circuits and air conditioners, can solve problems such as the inability to accurately determine the working condition of the input power supply.
Active Publication Date: 2021-07-16
MIDEA GRP CO LTD +1
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[0003] The main purpose of the present invention is to propose a phase loss detection circuit, which aims to solve the technical problem that the existing detection circuit cannot accurately determine the working condition of the input power supply
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[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. If there are descriptions involving "first", "second", etc. The descriptions of "first", "second" and so on are for descriptive purposes only, and should not be understood as indicating or implying their relative importance or implying the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.
[0032] The invention proposes a phase loss detection circuit to solve the technical problem that the detection circuit in the prior art cannot accurately determine the working condition of the input power supply, so as to realize the estimation of the working condition of the input power supply with higher accuracy.
[0033] Such as figure 1 , 2 As shown, in one embodimen...
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The present invention discloses a kind of lack of phase detection circuit and air conditioner. The lack of phase detection circuit three -phase power input terminal, phase voltage detection circuit and output device, phase voltage detection circuit, including the first detection branch, the second detection branch and the first first detection branch and the first detection branch and the first test.Third testing branch road, which is used to detect the difference between phase voltage between the UV phase, which is used to detect the difference between the phase voltage between the VW phaseThe branch circuit is used to detect the difference between phase voltage between the UW phase.The difference between the phase voltage between the UV phase of the UV phase detected by the first detection branch, the difference between the phase voltage between the VW phase of the VW phase detected by the second detection branch circuit, and the phase between the UW phase detected by the third detection branch circuitWhen the voltage difference is full of the phase balance conditions of the three -phase power supply, the three -phase power supply input terminal is determined.The present invention is used to solve the technical problems that cannot accurately determine the working situation of the input power supply.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to a phase loss detection circuit and an air conditioner. Background technique [0002] In the prior art, the power supply of the air conditioner is generally realized by a three-phase AC power supply, and the three-phase AC power is a form of electric energy transmission, referred to as three-phase power for short. Three-phase AC power supply is a power supply composed of three AC potentials with the same frequency, equal amplitude, and 120° phase difference. Generally recorded as U phase, V phase, W phase. In the actual application circuit, we will monitor the output of the three-phase AC power supply. The existing circuit estimates the working condition of the input power supply by detecting the voltage of the DC bus through the DC bus voltage detection circuit. However, this estimation method cannot accurately determine the operation of the input power supply. Conte...
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IPC IPC(8): G01R29/16
CPCG01R29/16
Inventor 邓谷城章文凯
Owner MIDEA GRP CO LTD