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2018 - 03 - 09
Release time: 64
Portable electronics are growing rapidly, from mobile phones and MP3 players to PDAs, personal DVD players, and more traditional laptops, and people are revisiting many aspects of consumer and profess...
2013 - 11 - 29
Release time: 36
The lighting industry continues to push inductive loads, and the trouble is that the inductive reactance generated by the system is reversed, which reduces the efficiency of the system. PFC solves the...
2013 - 11 - 29
Release time: 33
This paper proposes a technical solution using decentralized detection, centralized control and visual management, using embedded systems, wireless communication, computer software and Web technologie...
2013 - 11 - 29
Release time: 38
The TC4011BP (Q801) is connected to two RS flip-flops. Among them, RS1 is used to control the operation of the compressor, and RS2 is used to control the defrosting work. The working process is as fol...
2013 - 11 - 29
Release time: 31
The electronic temperature controller not only has the same temperature characteristics as the pressure type thermostat, but also can easily change the temperature characteristics according to the req...
2019 - 05 - 07
Release time: 33
Among many lithium ion protection schemes, multi-level protection schemes have been widely adopted to obtain high safety of lithium ion batteries. Usually multi-level protection includes active and pa...
2013 - 11 - 30
Release time: 36
The temperature sensors on the car are mostly negative temperature coefficient thermistors, such as the intake air temperature sensor of the engine,Coolant temperature sensor, oil temperature sensor, ...
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说明: Portable electronics are growing rapidly, from mobile phones and MP3 players to PDAs, personal DVD players, and more traditional laptops, and people are revisiting many aspects of consumer and professional product design.This change is most evident in battery technology. Users want batteries to meet increasingly complex application needs, so they need more current and longer working hours. At the same time, the demand for small, lightweight products is also very strong, and the battery accounts for a considerable proportion of the volume and weight of any device. Therefore, manufacturers pay great attention to reducing their volume and weight. Another point is the requirement for fast charging, that is, reducing the time that the user waits for charging, and maximizing the advantages of mo...
Release time: 2018 - 03 - 09
Click: 64
说明: The lighting industry continues to push inductive loads, and the trouble is that the inductive reactance generated by the system is reversed, which reduces the efficiency of the system. PFC solves the above problems. However, when the PFC is initially charged, it will generate a surge current that damages other circuits in the system, and the use of the thermistor can effectively suppress the surge current and prevent the circuit from being damaged.There are many ways to build a lighting system, and an excellent design can directly improve energy efficiency and save material costs. Today's lighting industry is gradually changing from 240V to 277V to improve efficiency. So now is the power factor correction (PowerFactor Correction, PFC) is an excellent time to introduce to lighting product ...
Release time: 2013 - 11 - 29
Click: 36
说明: This paper proposes a technical solution using decentralized detection, centralized control and visual management, using embedded systems, wireless communication, computer software and Web technologies to realize the visual management and operation of the solar central water heater system, while providing convenient after-sales service for enterprises. Service management means and convenient statistics and release of energy-saving data are of great significance for promoting the promotion and application of solar central water heaters.1 system designThe composition of the system is shown in Figure 1. It consists of three parts: the field terminal, the regional centralized control and management platform, and the enterprise centralized control and management center. The field terminal inclu...
Release time: 2013 - 11 - 29
Click: 33
说明: The TC4011BP (Q801) is connected to two RS flip-flops. Among them, RS1 is used to control the operation of the compressor, and RS2 is used to control the defrosting work. The working process is as follows: when the RS11 pin is lowWhen 3 feet are high level, Q81I is turned on, RY01 is closed, and the compressor is turned on; when RS16 pin is low level, 3 feet is low level, QS11 is cut off, RY01 is released, and the compressor is stopped. When pressing the 'Defrost Start' button on the panel, the SET terminal, that is, the input pin 13 of RS2 is grounded, which is low level. At this time, the RS2 output terminal 11 is high level, Q812 is turned on, and RY02 is connected. The defrosting heating wire is energized to defrost. At the same time, because the Q812 collector is low, through the diod...
Release time: 2013 - 11 - 29
Click: 38
说明: The electronic temperature controller not only has the same temperature characteristics as the pressure type thermostat, but also can easily change the temperature characteristics according to the requirements of the refrigerator manufacturer, eliminating the need for the pressure type thermostat to organize the production of new parts due to the change of temperature characteristics. The program speeds up the new product matching process and reduces the production cost. The electronic thermostat has a semi-automatic defrost function. The defrost heater can be manually activated as needed. When the set temperature is reached, the defrost is automatically stopped.working principle1.1 Power supplyAs shown in Figure 1, the AC 220V is stepped down by the transformer TR1, and then rectified and...
Release time: 2013 - 11 - 29
Click: 31
说明: Electronic thermometers bring new opportunities to temperature sensors    Since mercury (mercury) and most of its compounds are toxic, the ban and replacement of mercury thermometers has become a consensus in human society. In 2007, the European Parliament passed legislation prohibiting EU countries from using mercury-containing thermometers. By the end of 2007, 13 states in the United States had passed legislation prohibiting the use of mercury-containing thermometers. The electronic thermometer is the first choice to replace the mercury thermometer, and the thermometer will enter the era of electronic thermometers.    According to statistics, in 2007, the demand for electronic thermometers in the United States, Japan, the European Union and other countries and regions...
Release time: 2018 - 03 - 27
Click: 20
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