Wide-range current converter
A technology of current converter and wide range, which is applied in the direction of measuring electrical variables, voltage/current isolation, instruments, etc., to achieve the effect of simple method, low cost and solving detection problems
Inactive Publication Date: 2020-07-03
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +2
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem of program-controlled switching of the range in the current measurement process, achieve wide range measurement of the current, reduce the volume and weight of the current ratio conversion equipment, simplify the operation process, reduce labor intensity, and improve efficiency. The present invention provides A Wide Range Current Converter
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[0036] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0037] Such as figure 2 As shown, a single-range zero-flux current proportional converter includes converter arms, each arm includes a main switching element, and the main switching element of each arm can be switched to switch the corresponding arm in and out Corresponding to the circuit between the DC terminal and the AC terminal to control the form of the AC voltage at the AC terminal; including a zero-flux current transformer, a current sampling resistor, a magnetic balance detection and driving circuit, and a detection winding; zero-flux The magnetic balance detection winding of the current transformer is evenly wound on the annular iron core I1, and then the annular iron core II2 is embedded inside the annular iron core I1, and then the proportional winding is evenly wound on the annular iron core I1 and the annular iron core II2 , the primary winding is also...
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The invention discloses a wide-range current converter. The wide-range current converter includes a converter arm, a zero-flux current transformer, a current sampling resistor, a magnetic balance detection and drive circuit, a plurality of proportional winding range switching relays and a plurality of detection winding range switching relays, wherein a magnetic balance detection winding is uniformly wound on an annular iron core I, then an annular iron core II is embedded in the annular iron core I, proportional windings are uniformly wound on the annular iron core I and the annular iron coreII, and primary windings are also uniformly wound on the annular iron core I and the annular iron core II; and a secondary proportional winding N2 comprises a plurality of proportional segmented windings, each proportional segmented winding corresponds to a proportional segmented winding terminal, and the proportional segmented winding terminals correspond to the proportional winding range switching relays. The problem of current range adaptability of the zero-flux current proportional converter is solved; and the zero-flux current proportional converter is utilized to realize automatic detection of the current.
Description
technical field [0001] The invention relates to a wide-range current converter, which belongs to the technical field of electromagnetic measurement. Background technique [0002] Current proportional conversion usually adopts current transformer. Current transformer has the advantages of high accuracy and stable performance, but it is bulky and heavy, and there are many primary and secondary current terminals. The current wires of the terminals are disconnected, the operation process is complicated, the labor intensity is high, and the efficiency is low; it is difficult to measure the wide-range current with a current transformer. Contents of the invention [0003] The purpose of the present invention is to solve the problem of program-controlled switching of the range in the current measurement process, achieve wide range measurement of the current, reduce the volume and weight of the current ratio conversion equipment, simplify the operation process, reduce labor intensi...
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Patent Timeline
Login to View More IPC IPC(8): G01R15/18
CPCG01R15/183G01R15/186
Inventor 靳绍平李敏吴宇胡琛毛永晶周春芽唐新宇李欣
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST