延时启动型PTC热敏电阻器应用原理及应用
电机在启动时,要克服本身的惯性,同时还要克服负载的反作用力(如冰箱压缩机启动时必须克服制冷剂的反作用力),因此电机启动时需要较大的电流和转矩。当转动正常后,为了节约能源,需要的转矩又要大幅度下降。给电机加一组辅助线圈,只在启动时工作,正常后它就断开。将PTC热敏电阻串联在启动辅助线圈, 启动后PTC热敏电阻进入高阻态切断辅助线圈,正好可以达到这种效果.
该产品具有无触点、噪音低、可靠性高、寿命长等特点,不同的特性,结构用以保证不同的整机设计要求。
1.冰箱的压缩机启动用PTC热敏感电阻器 冰箱的压缩机由单相感应电动机驱动。电机启动时,既要克服本身的惯性,又要克服负载——高压制冷剂的反作用力,需要保证较大的启动电流,为此,通常要采用带PTC热敏电阻器的启动电路(原理图见图一)。 |
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2.变频空调启动用PTC热敏电阻器 变频空调启动时,电压经PTC元件加到整流滤波电路上,对电容器平稳充电至设定值,功率模块IPM开始工作,将输入的直流电压逆变为三支交流电加到三相交流电机绕组上,使电机正常运转。同时电容器充电至设定值后,经IPM输出一直流电压至继电器吸合开关K,PTC元件被端接,暂停工作(见图二)。 主回路中串接PTC元件的目的在于:避免在通电初期,整流滤波电路直接承受大电流的冲击,造成储能元件受损。即PTC元件在通电初期起一个缓冲与保护的作用。此外,若继电器失效(无法正常吸合)时,PTC元件通电后成为高阻态,可对电路进行保护。 |
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3.产品标志说明 | ||||
①产品系列:WMZ9延时启动型PTC热敏电阻 ②封装类型:1:裸片 2:壳装 ③标称阻值:82R-82Ω 4R7-4.7Ω 151-150Ω ④阻值精度:N-±30% M-±20% k-±10% J-±5% ⑤最大电压:180-180V 240-240V |
型号 |
标称阻值 |
开关温度 | 最大电压 | 最大电流 | 启动时间 | 消耗功率 | 恢复时间 |
线圈电阻 |
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 |