Ballast coil with high silicon steel sheet pile into light pole in the core

The inductance of the coil is related to the structure of the coil itself and in the middle of the medium, tubular coil in the middle of the medium is air, the inductance is a constant, not change according to the size of the current in a coil, the inductance is called linear inductance. In the ballast coil is to use the



the inductance of the coil is related to the structure of the coil itself and in the middle of the medium, tubular coil in the middle of the medium is air, the inductance is a constant, not change according to the size of the current in a coil, the inductance is called linear inductance. Ballast is made of silicon steel sheet in coil' The silicon steel sheet, English name is silicon lamination, it is a kind of low carbon ferrosilicon soft magnetic alloys, general silicon content is 0. Five to four. 5%. 】 Fold into the iron core. To make the ballast has good linear, should be controlled within the magnetic induction intensity 【 Magnetic induction intensity describe the magnetic field strength and direction of physical quantities, is vector, commonly used symbol B said the international general unit for tesla ( Symbol for T) 。 】 B in the magnetization curve' Magnetization curve is said the material of the magnetic field intensity H and the magnetic induction intensity B or the relationship between the magnetization M. 】 Near the knee, to ensure that the ballast has good technical data and economic effect. According to the working characteristic of gas discharge lamp, but need a period of time from the start to normal point, and starting current is big, and it has a high pulse voltage 【 Refers to the brief of voltage or current mutation, common pulse shapes are rectangle pulse, square wave pulse, spike, sawtooth pulse, step pulse, intermittent sine pulse, etc. , pulse voltage is paroxysmal and discontinuity. Pulse voltage waveform is square wave, similar to person's pulse beats! 。 。 。 】 。 When the light bulb light in normal, and to ensure that the working current and the working voltage of the light bulb, using a magnetic gap of the iron core coil can meet the requirements. When the supply voltage is higher than the rated voltage, ballast to limit the increase of current value, to a certain extent when electricity as the voltage is lower than the rated voltage and to limit to a certain extent reduce the system of current value, to ensure that the light bulb but life and work characteristics. Simple judge ballast volt-ampere characteristic, we can see that the ratio of the starting current and working current of the ballast. Such as rev. The closer it gets to the working current, then the volt-ampere characteristics of ballast, the better. When choosing ballast, such as ballast and high pressure mercury lamp with, can choose volt-ampere characteristic starting current as close as possible to better the working current, such as to match with high pressure sodium lamp, according to the trigger mode of high pressure sodium lamp considered, such as used to trigger the high pressure sodium lamp and blending, should choose small starting current, such as choose starting current 3 250 w high pressure sodium lamp. 7 a, such as used to trigger the high pressure sodium lamp and the blending, to cope with the resistance wire heating in the lamp to x, can choose starting current is larger, but its starting current should not be greater than 1 working current. Five times, so that the light bulb has a high life expectancy.