The brushless dc motor in the south of anhui | protection grade brushless dc motor protection grade | the brushless dc motor in the south of anhui

The brushless dc motor (in the south of anhuiHereinafter referred to as the brushless dc motor)Refers to the brushless dc motor shell protection grade (Contain the junction box, etc. )Protective brushless dc electrical and mechanical way parts and rotating parts (Except for smooth shaft)Ability. In nameplate IPxy which IP is the international general protection grade code (Separately & other; International & throughout; And & otherProtection grade & throughout; Two words of English. The International section I and Degree of Protect Protect 'P) in the, the back of the x and y is a number respectively, x is 0 ~ 6, a total of 7 each, on behalf of the solid proof ability, y is 0 ~ 8, a total of nine, on behalf of the liquid (Generally refers to water)Ability. The greater the number, the stronger the protection. Table 1 and table 2, given the current GB/T4942 respectively. 1 -For protection of solid and liquid capacity in 2006. Bring axial-flow compressor. in order brushless dc solid ability (table 11)Ability of solid level 5 is called & other; Dust & throughout; , but will not affect brushless dc motor is running under the premise of allowing a small amount of dust into the inside of brushless dc motor. （2)Ability of solid rank 6 called & other; Tight dust & throughout; That completely permit internal dust into the brushless dc motor. （3)Ability of liquid level 2 and level 3 mentioned in the point of view, in the table can be shown by hints of brushless dc motor of the radial, can also be a brushless dc motor with axial or any other direction. Level 3 can be a change in the direction of water, can also be a change in the direction of brushless dc motor. Brushless dc writers bring table 2 liquid capacity (4)Ability of liquid level 5 on the about 30 kpa pressure of spray water, the water pressure measurement can replace, the height of the nozzle water (Spray height is about 2. 5 meters, as shown in figure 1)Water spray test time undertake convert by surface area subjects brushless dc motor, for 1 min per square metre, but at least for 3 min. The nozzle with the test of the surface of the brushless dc motor for 3 m apart, as shown in figure 2. If necessary, when the upward jet brushless dc machine, in order to ensure the proper injection quantity, can shorten the distance. （5)When testing to prevent liquid ability level 7, it can use one of the following 2 methods: 1)Water immersion test, the brushless dc motor experiment fully immersed in water, and satisfy the following conditions, as shown in figure 3, the surface should be higher than that of brushless dc motor vertex at least 150 mm; Below the surface of the water at the bottom of the brushless dc motor with at least 1 m; The test time for at least 30 min; Water and temperature difference of brushless dc motor should be no greater than 5 k. 2)Charging test: internal aeration to brushless dc motor, make its internal pressure higher than external 10 kpa, the test time for 1 min. When no air show, that meets the requirements. Leak check of the best ways to brushless dc motor can be submerged in the water, as shown in figure 4, rub soap and water in surface of brushless dc motor. After test, the water inflow of brushless dc motor should be enough to affect the normal operation of the brushless dc motor; Not scheduled in wet state run winding and live parts shall not wet, and water should not be immersed within the brushless dc motor and the parts. The inside of the brushless dc motor fan blade allows moisture, at the same time, if there are any drainage measures, also allow along the shaft end leakage into the water. Such as brushless dc motor in static state experiment, should be under the rated voltage no-load after 15 min, and then to withstand voltage test, the test voltage shall be the new BLDC motor test value of 50%, but should not be lower than 125% rated voltage brushless dc motor by experiment. Such as brushless dc motor in rotating condition experiments, can be directly to the withstand voltage test. Brushless dc motor winding, wire and conductive device for casing and mutual no breakdown or flashover phenomenon, argues that test.