AC constant current source based on electronic load
A technology of AC constant current source and electronic load, which is applied to the components of electrical measuring instruments, measuring electricity, and measuring electrical variables. It can solve problems such as slow output response, large waveform ripple, and easy deviation of results, and achieve current The effect of fast output response, small waveform distortion and high practicability
Pending Publication Date: 2022-04-29
苏州瑞仪智能科技有限公司
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Problems solved by technology
[0002] In order to be able to measure the performance of electronic components, and then to achieve product quality control and provide a test basis for product development, in the existing solutions for testing electronic components on the market, it is necessary to carry out test experiments under multiple current conditions, especially for As far as the contactor test system is concerned, it is necessary to verify its performance characteristics under different currents, but most of the existing AC constant current sources on the market are realized by the inverter principle, the waveform ripple is large, and the accuracy can only reach about 1%. The predetermined current value cannot be reached within 60 milliseconds before the waveform of the AC constant current source
This leads to slow output response when the current changes, and low current accuracy, which leads to deviations in the final test results
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[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0028] In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.
[0029] This embodiment describes an electronic load-based AC constant current source, such as figure 1 As shown, it includes a power transformation circuit, a high-speed analog-to-digital conversion circuit and a main control module, wherein the power transformation circuit adjusts the current output through ...
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The invention relates to an alternating current constant current source based on an electronic load, which comprises a power transformation circuit, a high-speed analog-to-digital and digital-to-analog conversion circuit and a main control module, and is characterized in that the power transformation circuit adjusts current output through the electronic load arranged on the primary side of a transformer; the output current is collected by the high-speed analog-to-digital / digital-to-analog conversion circuit and sent to the main control module to form closed-loop feedback control, and the main control end of the main control module is electrically connected with the electronic load. The current output response is fast, the current precision is high, and the circuit structure is stable and reliable, is convenient to adjust, and can be applied to various different working scenes.
Description
technical field [0001] The invention relates to the technical field of testing equipment, in particular to testing equipment in the field of electronic appliances, and in particular to an AC constant current source for powering test loads. Background technique [0002] In order to be able to measure the performance of electronic components, and then realize product quality control and provide test basis for product development, in the existing solutions for testing electronic components on the market, it is necessary to carry out test experiments under multiple current conditions, especially for As far as the contactor test system is concerned, it is necessary to verify its performance characteristics under different currents, but most of the existing AC constant current sources on the market are realized by the inverter principle, the waveform ripple is large, and the accuracy can only reach about 1%. The predetermined current value cannot be reached within the first 60 mil...
Claims
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Login to View More IPC IPC(8): G01R1/28
CPCG01R1/28
Inventor 蔡金伟李辉张海牛
Owner 苏州瑞仪智能科技有限公司