How to get power information
A technology of power information and acquisition method, applied in the direction of measuring electrical variables, measuring current/voltage, measuring resistance/reactance/impedance, etc., can solve the problem of power meter chip crash, adding optocoupler and isolating auxiliary power supply, cost, etc. problem, to achieve the effect of cost saving, high accuracy and easy completion
Active Publication Date: 2016-03-16
DELTA ELECTRONICS INC
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Problems solved by technology
[0003] In the prior art, for obtaining the input current of the power supply, one method is to connect a power meter chip between the terminal of the input terminal and the power supply. machine, and it is necessary to add an optocoupler and an isolated auxiliary power supply, which requires additional cost; another method is to use the digital signal processor or single chip in the primary and secondary power factor correction circuit to calculate the input current, but this method only The real power can be directly calculated. If the input current of the power supply needs to be obtained, an additional current transformer (CurrentTransformer, CT) must be connected between the terminal of the input terminal and the power supply, which also requires additional costs.
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[0035] A method for obtaining electric power information according to a preferred embodiment of the present invention will be described below with reference to related drawings, wherein the same components will be described with the same reference symbols.
[0036] Please refer to Figure 1A As shown, it is a flow chart of a method for obtaining power information in a preferred embodiment of the present invention, please refer to figure 2 As shown in , it is a schematic diagram of the equivalent circuit of the hardware connection for easy understanding. The method disclosed in this embodiment is used in conjunction with a power supply 2 , and the steps in the flow chart will be described below in conjunction with the above diagram.
[0037] In step S01 , the power supply 2 is coupled to an AC power source 3 . Such as figure 2 As shown, in this embodiment, the power supply 2 has a capacitor 21 (namely X capacitor) and a power factor correction circuit 22 , and the capacitor...
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The invention discloses an electric power information obtaining method which is applied by being matched with a power supply unit. The electric power information obtaining method comprises the following steps of coupling the power supply unit with an alternating current power supply; detecting voltage of the alternating current power supply to obtain a first voltage; detecting the frequency of the alternating current power supply to obtain a first frequency; calculating electric power information of the power supply unit according to the first voltage and the first frequency, wherein the electric power information includes an input current, an input voltage and input power provided for the power supply unit provided by the alternating current power supply.
Description
technical field [0001] A method for obtaining electric power information, in particular a method for obtaining electric power information of a power supply. Background technique [0002] Power supplies are widely used in the power supply of many electronic devices, such as personal computers, notebook computers or servers, etc. No matter what kind of electronic device the power supply is used for, the accuracy of its input current is more and more demanding. higher. For example, in the past, when the input current was greater than or equal to 3A, an error of 5% could be tolerated, but under current standard requirements, only an error of 3% can be tolerated. It can be seen that it is very important to accurately obtain the input current of the power supply. [0003] In the prior art, for obtaining the input current of the power supply, one method is to connect a power meter chip between the terminal of the input terminal and the power supply. machine, and it is necessary ...
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IPC IPC(8): G01R19/00G01R21/06G01R23/02G01R27/26
Inventor 林圣贤古忠平
Owner DELTA ELECTRONICS INC