延時啟動型PTC熱敏電阻器應用原理及應用
電機在啟動時,要克服本身的慣性,同時還要克服負載的反作用力(如冰箱壓縮機啟動時必須克服制冷劑的反作用力),因此電機啟動時需要較大的電流和轉矩。當轉動正常后,為了節(jié)約能源,需要的轉矩又要大幅度下降。給電機加一組輔助線圈,只在啟動時工作,正常后它就斷開。將PTC熱敏電阻串聯在啟動輔助線圈, 啟動后PTC熱敏電阻進入高阻態(tài)切斷輔助線圈,正好可以達到這種效果.
?? 該產品具有無觸點、噪音低、可靠性高、壽命長等特點,不同的特性,結構用以保證不同的整機設計要求。
1.冰箱的壓縮機啟動用PTC熱敏感電阻器 冰箱的壓縮機由單相感應電動機驅動。電機啟動時,既要克服本身的慣性,又要克服負載——高壓制冷劑的反作用力,需要保證較大的啟動電流,為此,通常要采用帶PTC熱敏電阻器的啟動電路(原理圖見圖一)。 |
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2.變頻空調啟動用PTC熱敏電阻器 變頻空調啟動時,電壓經PTC元件加到整流濾波電路上,對電容器平穩(wěn)充電至設定值,功率模塊IPM開始工作,將輸入的直流電壓逆變?yōu)槿Ы涣麟娂拥饺嘟涣麟姍C繞組上,使電機正常運轉。同時電容器充電至設定值后,經IPM輸出一直流電壓至繼電器吸合開關K,PTC元件被端接,暫停工作(見圖二)。 主回路中串接PTC元件的目的在于:避免在通電初期,整流濾波電路直接承受大電流的沖擊,造成儲能元件受損。即PTC元件在通電初期起一個緩沖與保護的作用。此外,若繼電器失效(無法正常吸合)時,PTC元件通電后成為高阻態(tài),可對電路進行保護。 |
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3.產品標志說明 | ||||
①產品系列:WMZ9延時啟動型PTC熱敏電阻 ②封裝類型:1:裸片 2:殼裝 ③標稱阻值:82R-82Ω 4R7-4.7Ω 151-150Ω ④阻值精度:N-±30% M-±20% k-±10% J-±5% ⑤最大電壓:180-180V 240-240V |
型號 |
標稱阻值 |
開關溫度 | 最大電壓 | 最大電流 | 啟動時間 | 消耗功率 | 恢復時間 |
線圈電阻 |
尺寸 | |
R25(Ω) | Tb(℃) | Vmax(V) | Imax(A) | T0(S) | Pmax(W) | Trmax() | Rref(Ω) | D(mm) | T(mm) | |
WMZ91-3R3M160 | 3.3 |
120±10 |
160 | 12 | 0.3-1.2 | 3.5 | 100 | 10 |
20.0±1.0 |
2.5±0.2 |
WMZ91-3R9M160 | 3.9 | 160 | 12 | 0.3-1.2 | 3.5 | 100 | 10 | |||
WMZ91-4R7M180T2 | 4.7 | 180 | 12 | 0.3-1.2 | 3.5 | 100 | 10 | |||
WMZ91-5R6M180T2 | 5.6 | 180 | 12 | 0.3-1.2 | 3.5 | 100 | 10 | |||
WMZ91-6R8M220 | 6.8 | 220 | 10 | 0.3-1.2 | 3.5 | 100 | 15 | |||
WMZ91-10RM240 | 10 | 240 | 10 | 0.2-1.0 | 3.5 | 90 | 15 | |||
WMZ91-15RM260 | 15 | 260 | 10 | 0.2-1.0 | 3.5 | 90 | 25 | |||
WMZ91-22RM300 | 22 | 300 | 9 | 0.2-1.0 | 3 | 90 | 25 | |||
WMZ91-33RM300 | 33 | 300 | 9 | 0.2-1.0 | 3 | 90 | 25 | |||
WMZ91-47RM300 | 47 | 300 | 9 | 0.2-1.0 | 3 | 90 | 25 | |||
WMZ91-68RM320 | 68 | 320 | 9 | 0.2-1.0 | 3 | 90 | 25 | |||
WMZ91-4R7M170 | 4.7 |
120±10 |
170 | 12 | 0.2-1.0 | 3.5 | 85 | 10 |
17.5±1.0 |
2.5±0.2 |
WMZ91-5R6M190 | 5.6 | 190 | 12 | 0.2-1.0 | 3.5 | 85 | 10 | |||
WMZ91-6R8M220 | 6.8 | 220 | 10 | 0.2-1.0 | 3.5 | 85 | 15 | |||
WMZ91-10RM240 | 10 | 240 | 9 | 0.2-1.0 | 3.5 | 85 | 20 | |||
WMZ91-15RM260 | 15 | 260 | 8 | 0.2-1.0 | 3.5 | 85 | 20 | |||
WMZ91-22RM280 | 22 | 280 | 8 | 0.2-1.0 | 3.5 | 85 | 15 | |||
WMZ91-33RM280 | 33 | 280 | 7 | 0.2-1.0 | 3 | 85 | 20 | |||
WMZ91-47RM300 | 47 | 300 | 6 | 0.2-1.0 | 3 | 85 | 20 | |||
WMZ91-68RM300 | 68 | 300 | 5 | 0.2-1.0 | 3 | 85 | 20 | |||
WMZ91-3R3M160 | 3.3 | 135±10 | 160 | 12 | 0.3-1.2 | 3.5 | 80 | 10 | 20.0±1.0 | 2.5±0.2 |
WMZ91-3R9M160 | 3.9 | 160 | 12 | 0.3-1.2 | 3.5 | 80 | 10 | |||
WMZ91-4R7M180TG | 4.7 | 180 | 12 | 0.3-1.2 | 3.5 | 80 | 10 | |||
WMZ91-5R6M180TG | 5.6 | 180 | 12 | 0.3-1.2 | 3.5 | 80 | 10 | |||
WMZ91-6R8M200TG | 6.8 | 200 | 10 | 0.3-1.2 | 3.5 | 80 | 15 | |||
WMZ91-10RM230 | 10 | 230 | 9 | 0.45-1.35 | 3.2 | 70 | 15 | |||
WMZ91-15RM250 | 15 | 250 | 8 | 0.45-1.35 | 3.2 | 70 | 15 | |||
WMZ91-22RM300 | 22 | 300 | 7 | 0.45-1.35 | 3.2 | 70 | 20 | |||
WMZ91-33RM360 | 33 | 360 | 6 | 0.45-1.35 | 3.2 | 70 | 25 | |||
WMZ91-47RM400 | 47 | 400 | 5 | 0.45-1.35 | 3.2 | 70 | 35 | |||
WMZ91-68RM430 | 68 | 430 | 4 | 0.45-1.35 | 3.2 | 70 | 55 | 17.5±1.0 | 2.5±0.2 | |
WMZ91-4R7M180 | 4.7 | 135±10 | 180 | 10 | 0.3-1.2 | 3.4 | 90 | 15 | ||
WMZ91-5R6M180 | 5.6 | 180 | 10 | 0.3-1.2 | 3.4 | 90 | 15 | |||
WMZ91-6R8M200 | 6.8 | 200 | 9 | 0.3-1.2 | 3.4 | 90 | 15 | |||
WMZ91-10RM220 | 10 | 220 | 8 | 0.3-1.2 | 3.2 | 90 | 20 | |||
WMZ91-15RM240 | 15 | 240 | 7 | 0.2-1.0 | 3.2 | 80 | 20 | |||
WMZ91-22RM280 | 22 | 280 | 6 | 0.2-1.0 | 3.2 | 70 | 25 | |||
WMZ91-33RM320 | 33 | 320 | 4 | 0.2-1.0 | 3.2 | 70 | 45 | |||
WMZ91-47RM350 | 47 | 350 | 4 | 0.2-1.0 | 3.2 | 70 | 45 | |||
WMZ91-68RM400 | 68 | 400 | 4 | 0.2-1.0 | 3.2 | 70 | 45 | |||
WMZ91-4R7M160 | 4.7 | 135±10 |
160 | 10 | 0.4-1.5 | 3 | 90 | 15 | 16±1.0 | 2.5±0.2 |
WMZ91-5R6M170 | 5.6 | 170 | 10 | 0.4-1.5 | 3 | 90 | 15 | |||
WMZ91-6R8M180 | 6.8 | 180 | 9 | 0.4-1.5 | 3 | 90 | 15 | |||
WMZ91-10RM200 | 10 | 200 | 8 | 0.4-1.5 | 3 | 90 | 15 | |||
WMZ91-15RM230 | 15 | 230 | 7 | 0.4-1.5 | 3 | 80 | 20 | |||
WMZ91-22RM250 | 22 | 250 | 6 | 0.4-1.5 | 3 | 80 | 20 | |||
WMZ91-6R8M160 | 6.8 | 135±10 | 160 | 8 | 0.1-0.8 | 3 | 80 | 15 | 14±1.0 | 2.5±0.2 |
WMZ91-10RM180 | 10 | 180 | 7 | 0.1-0.8 | 3 | 80 | 20 | |||
WMZ91-15RM240 | 15 | 240 | 6 | 0.1-0.8 | 3 | 80 | 25 | |||
WMZ91-22RM240 | 22 | 240 | 5 | 0.1-0.8 | 3 | 70 | 25 | |||
WMZ91-33RM250 | 33 | 250 | 4 | 0.1-0.8 | 3 | 70 | 30 |