Dab tsi yog cov khoom siv insulating feem ntau rau cov motors

Insulating materials are materials that are non-conducting under allowable voltage, but not absolutely non-conducting materials. Under the action of a certain external electric field strength, conduction, polarization, loss, breakdown and other processes will also occur, and long-term use will also occur Ageing. The resistivity of this product is very high, usually in the range of 1010～1022Ω·m. For example, in a motor, the insulating material around the conductor isolates the turns and the grounded stator core to ensure the safe operation of the motor.

Ib qho: Zaj duab xis thiab cov ntaub ntawv sib xyaw rau hluav taws xob engineering

Ob peb lub siab molecular polymers tuaj yeem ua rau hauv cov yeeb yaj kiab nrog cov yam ntxwv sib txawv thiab siv. Cov yam ntxwv ntawm cov yeeb yaj kiab hluav taws xob yog nyias thickness, softness, noo noo tsis kam, thiab zoo hluav taws xob thiab mechanical zog. Cov yeeb yaj kiab uas siv hluav taws xob feem ntau yog polyester zaj duab xis (theem E), polynaphthyl ester zaj duab xis (theem F), aromatic polyamide zaj duab xis (theem H), polyimide zaj duab xis (theem C), polytetrafluoroethylene zaj duab xis (theem H). Feem ntau siv raws li lub cev muaj zog coil wrapping rwb thaiv tsev thiab winding liner rwb thaiv tsev.

2: Insulating mica thiab nws cov khoom

Muaj ntau hom natural mica. Cov mica feem ntau siv hauv hluav taws xob rwb thaiv tsev yog feem ntau muscovite thiab phlogopite. Muscovite tsis muaj xim thiab pob tshab. Phlogopite yog nyob ze rau cov xim hlau lossis semi-metallic luster, thiab feem ntau yog kub, xim av lossis lub teeb ntsuab. Muscovite thiab phlogopite muaj cov khoom siv hluav taws xob zoo thiab kub ua haujlwm, tshuaj lom neeg ruaj khov, thiab zoo corona kuj. Nws tuaj yeem tev rau hauv cov nyias nyias nyias nrog lub thickness ntawm 0.01 ~ 0.03 hli. Nws yog ib qho tseem ceeb raw khoom rau kev tsim khoom ntawm high-voltage rwb thaiv tsev cov ntaub ntawv.

3: Laminated khoom

Lub cev muaj zog feem ntau siv laminated khoom yog ua los ntawm iav ntaub (los yog mesh) dipped nyob rau hauv cov kua nplaum (xws li epoxy resin, silicone resin los yog phenolic resin) thiab ces kub nias. Ntawm lawv, phenolic iav ntaub board muaj qee lub zog thiab cov khoom siv hluav taws xob: tab sis nws muaj qhov tsis zoo cleavage tsis kam thiab mildew tsis kam, uas tsim nyog rau kev ua cov khoom siv insulating. Epoxy phenolic resin iav ntaub board muaj lub zog txhua yam, tsis muaj dej tsis kam, kev ua haujlwm hluav taws xob thiab pwm ua haujlwm. Nws yog tsim rau high-voltage motors raws li stunning qhov chaw, thiab yog haum rau siv nyob rau hauv cov huab cua sov cheeb tsam. Cov organic silicon iav ntaub board muaj cov cua kub tsis kam (H qib) thiab kev ua haujlwm zoo hluav taws xob, tab sis nws lub zog txhua yam yog qis dua li ntawm epoxy phenolic iav ntaub board. Nws yog tsim rau kub resistant rwb thaiv tsev qhov chaw thiab kuj haum rau sib xyaw tropical cheeb tsam. Cov laminates feem ntau yog siv los ua cov kab sib txuas, qhov sib txuas, cov ntaub thaiv npog thiab cov kab hluav taws xob hauv cov tshuab me me thiab nruab nrab.