Research And Implement Based On High Capability And Large Current Measureing Technology

The principle of high capability and large current measureing instrument is based on Hall Effect. Under the insulation condition, It can measure direct current, alternating current, pulse current and other anomaly current wave. Commonly when the current become bigger, the cubage of the equipment has to be lager. This change can influence the precision, stability and responsive time. However following the development of the industrial and military instrument, high capability and large current measureing instrument with high precision, stability,small cubage and fast response should be used.This article is based on certain military scientific research requirement which designed a high capability and large current measureing instrument to measure 300A current. To suffice the high stability requirement, hall effect and equation principle is used on overall arrangement. Helix loop is used as feed back magnetism to compensate the magnetism rute; analyse the magnetic field which aroused by the circuit board arrangement and use the magnetic field equation principle to arrange the circuit board. This instrument has several characteristic below:high precision, high stability,small cubage and fast response.