With the development of technology, electronic technology products are widely used in our lives, or some unpatched electronic components are very important in the equipment. Today, talk to everyone talks about overcurrent maintenance of high molecule PTC self-recovery fuses. It may be aware of the high-molecular PTC self-recovery fuse, but the high-molecular PTC self-service maintenance is used, many people belong to all words, and even have a little bit. So I want to know what the high-molecule PTC self-recovery fuse is used, please see it!
With the development of technology, electronic technology products are widely used in all of our lives, or some unpacked electronic components bear a very important role in equipment. Today, Xiaoxia will talk to you to talk about overcurrent maintenance of high molecule PTC self-recovery fuses. It may be aware of the high-molecular PTC self-recovery fuse, but the high-molecular PTC self-service maintenance is used, many people belong to all words, and even have a little bit. So I want to know what the high-molecule PTC self-recovery fuse is used, please see it!
PTC self-recovery fuse
1. PTC effect
The PTC effect says that a data has a PTC (POSITEMPERATURECOEFFICIENT) effect, ie the positive temperature coefficient effect, which means that the resistance of this data will be added as the temperature increases. Most metal materials have a PTC effect. In these gues, the PTC effect is characterized by the resistance as a temperature added, which is generally the linear PTC effect.
II. Nonlinear PTC effect
Nonlinear PTC effects will exhibit a sharp addition in narrow temperature range of the electrical resistance. Several phenomena of a few to more than a dozen orders, ie nonlinear PTC effects. A considerable number of types of conductive polymerizations present this effect, such as polymer PTC self-recovery fuses. These conductive polymers are useful for manufacturing overcurrent maintenance devices.
III. Polymer PTC self-recovery fuse
PTC self-recovery fuse because there is a unique positive temperature coefficient resistance characteristic, ie PTC Features, therefore is extremely suitable as overcurrent maintenance devices. The use of the self-recovery fuse is the same as the general fuse, and it is used in series in the circuit.
When the circuit is working properly, the temperature of the self-recovery fuse is near the room temperature, the resistance is small, and the series is not hindered in the circuit.The current is passed; when the circuit occurs due to the failure, the self-recovery fuse causes the temperature to rise because the temperature exceeds the switching temperature, and the current is aggressive to the security value when the temperature exceeds the switching temperature.
After the recovery fuse operation, the current in the circuit has a large decrease, and T is the action time of the self-recovery fuse. Because the polymer PTC self-recovery fuse can be planned to be planned, the switching temperature (TS) of the itself can be modulated to adjust its sensitivity to the temperature, so it can simultaneously serve both over temperature maintenance and overcurrent maintenance.
The polymer PTC self-recovery fuse is a direct thermal, stepped self-recovery fuse, and its resistance variation process is related to the heating and heat dissipation conditions, so it maintains current ( IHOLD), action current (ITrip) and action are affected by ambient temperature.
Self-recovery fuse is typically maintaining current, operating current and ambient temperature: When the ambient temperature and current are in a region A, the heat transfer power of the self-recovery filament is greater than the heat dissipation power; When the ambient temperature and current are in a region B, the heat generating power is less than the heat dissipation power, and the self-recovery fuse will last for a long time; when the ambient temperature and current are in the C zone, the heat dissipation power of the self-recovery fuse is close to the heat transfer power, and therefore it is possible to operate May not move.
In summary, are you aware of the overcurrent maintenance of the polymer PTC self-recovery fuse! Polymer PTC self-recovery fuses is very common in our daily equipment! Want to know more information related to the high molecule PTC self-recovery fuse? And listen to the decomposition!
Continental electronic super store Website: http://dz-dz.hqew.com/
Original article，author：zongmuLi，If reprinted，Please indicate the source：http://madedesign.net/index.php/2021/01/10/do-you-know-what-the-high-molecular-ptc-self-recovery-fuse-is-used/