我测试PTC陶瓷发热芯,通电后其温度升高时稳压电源上显示的电压及电流均偏小,电压又逐渐增大,为什么?

2025-04-05 16:10:09
推荐回答(3个)
回答1:

不知是用在什么地方上的,PTC里有温度检测,当加电时PTC迅速发热,此时电流较大所以讲电压拉了下来,当热到一定程度它就为了保持这个温度,不需要多的电量所以电流就减小,电压又恢复。 可以看出你的稳压电源不是很好。

回答2:

电压变化说明你的稳压电源的功率不够大,电流是随温度而逐步减小的

回答3:

合金丝电热元件存在高温容易氧化、寿命短、有明火不安全、热效率低、加热不均匀等缺点;
PTC 电热元件的加热温度一般只有200℃左右,加热温度高于120℃的则普遍采用四氧化三铅,由于含铅量大而正属被淘汰的产品;
MCH高效环保节能陶瓷发热组件采用将发热电阻浆料按照发热电路设计的要求印刷于流延陶瓷生坯上,然后多层叠合共烧成一体,从而具有耐腐蚀、耐高温、寿命长、高效节能、温度均匀、导热性能良好、热补偿速度快等优点,而且不含铅、镉、汞、六价铬、多溴联苯、多溴二苯醚等有害物质,符合欧盟RoHS等环保要求;
MCH发热片优势具有:
² 节能,热效率高,单位热耗电量比PTC节省20~30%;
² 表面安全不带电,绝缘性能好:能经受4500V/1S的耐压测试,无击穿,漏电流<0.5mA;
² 无冲击电流;
² 无功率衰减;
² 升温快速:10秒可达额定的100℃~230℃; 30秒可达500℃~700℃;
² 安全,无明火;
² 热均匀一致性好,功率密度高:≥10 W/cm2;
² 环保:不含铅、镉、汞、六价铬、多溴联苯、多溴二苯醚等有害物质,完全符合欧盟环保要求;
² 使用寿命长。
衡业新材料科技(苏州)有限公司,是由留美、留德等归国技术人士、国内团队以及海内外风险投资共同创办的高新技术企业;

衡业陶瓷,建立了基于超薄多层功能陶瓷、厚膜多层陶瓷、低温共烧陶瓷、精密微结构陶瓷、陶瓷喷涂等相关的研发设备、先进生产设备、工艺处理设备和场地,具有领先的技术、工艺、设备、场地基础。

目前,衡业陶瓷,在以下应用领域推出领先的产品:
精密结构陶瓷:各类陶瓷器件,广泛用于密封、封装、其他工业器件之中
高温共烧陶瓷:高端陶瓷加热管(片)、陶瓷臭氧片(管),用于各类高要求加热领域
多层陶瓷传感器:汽车氧传感器陶瓷芯片、其他陶瓷传感器
低温共烧陶瓷:用于LED封装用的LTCC\HTCC、COB板等
功能陶瓷:硬盘驱动陶瓷片、精密震动盘陶瓷片等
陶瓷喷涂:在各类金属器件喷涂陶瓷

衡业陶瓷已经建成了综合的陶瓷研发生产平台,领先的陶瓷产品已经在以上领域的知名企业,得到广泛应用。

衡业陶瓷具有优秀的研发团队,主要研发核心人士由国内外知名的教授和博士组成,都有多年的在海外技术研究和学习经历,以及高屋建瓴的国际视野,领先的研发能力,是衡业发展的核心动力。

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