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2018 - 03 - 09
点击次数: 75
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
点击次数: 42
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
点击次数: 39
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
点击次数: 56
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
点击次数: 43
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
点击次数: 40
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
点击次数: 45
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: 2018 - 03 - 09
Click: 75
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: 2013 - 11 - 29
Click: 42
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: 2013 - 11 - 29
Click: 39
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: 2013 - 11 - 29
Click: 56
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: 2013 - 11 - 29
Click: 43
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