What does the PV component PID effect mean? When it comes to PV modules, we must pay attention to its two major effects, one is the hot spot effect and the other is the PID effect. So, what is the PV PID effect?
The full name of PID in English is: PotenTIal Induced DegradaTIon, which is the potential induced attenuation.
In 2005, SunPower Corporation of the United States first discovered and proposed the PID effect, which means that the components work at high voltage for a long time, there is leakage current between the cover glass, the packaging material and the frame, and a large amount of electric charge is accumulated on the surface of the battery sheet, so that the surface of the battery sheet is passivated. The effect is degraded, resulting in a fill factor, short circuit current, and open circuit voltage drop, making the component performance lower than the design standard, but this attenuation is reversible.
Some studies have also found that the PID effect is explained: when the photovoltaic module is under negative bias, the leakage current anode ions (generally Na ions) flow into the cell, reducing the parallel resistance of the cell. That is, impurities appear in the semiconductor, which form a conductive path inside the battery, reducing the current output of the component.
The third reason for generating the PID effect of the PV module is that the edge portion of the PV module is prone to moisture and water. When EVA is hydrolyzed, acetic acid is formed, and Na in acetic acid and glass reacts to generate a large amount of freely moving Na ions. Reacts with the silver grid lines on the surface of the cell, corroding the cell gate lines, resulting in an increase in series resistance, resulting in degradation of component performance, such attenuation being unrecoverable.
It can be seen that there are two main reasons for the formation of the PID effect of photovoltaic modules:
1. The original PN junction electric field changes, or there are other current channels, causing the photo-generated current actually flowing through the PN junction to decrease;
2. The device is affected by ion migration, and the material properties undergo an irreversible change, and the output power is smaller than that of the original manufactured component.
At present, according to the PV component PID effect, although the PID can be weakened or avoided from the battery, component and system side respectively, the effect of the PID effect is finally reflected on the battery chip. Therefore, it is recommended that battery manufacturers conduct more comprehensive research on products, combining upstream and downstream, and considering cost-effective solutions as a whole.
The micro Vibration Motor is introduced:
Micro vibration motor is mainly used for adult health care products and toys, micro vibration motor is a Dc Motor, the motor shaft with an eccentric wheel, the use of most of the micro vibration motor voltage is lower than 6 v, probably between 6 mm to 15 mm in diameter, when the motor rotation, eccentric circle particles is not the core of the motor, the motor often lose their balance, due to the inertia effect.
Characteristics: small volume, strong vibration;
Features: small size, fast speed, stable performance, low price, can use battery drive,Can change the different materials of the pendulum head
Method of use: the best stable in horizontal plane, installed on the dc Micro vibration motor output shaft parts, cannot use a hammer to knock, knock prone to press into the Micro vibration motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
Mini Vibration Motor should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a Mini Vibration Motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
Mini Vibration Motor should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of Mini Vibration Motor is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.
â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.
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Shenzhen Shunchang Motor Co., LTD. , https://www.scgearmotor.com