▌Details

1. Frequency conversion control in air conditioning system
   Case background: The traditional air conditioner uses a constant speed compressor, which has large current and high energy consumption when starting, and the temperature adjustment is not accurate enough. The inverter air conditioner controls the speed of the compressor through the inverter, and can flexibly adjust the cooling or heating power according to the change of indoor temperature.
   Solution: In the home air conditioner series launched by Midea Group, advanced DC frequency conversion technology is adopted, in which the inverter plays a key role. It can accurately control the speed of the compressor according to the feedback information of the indoor and outdoor temperature sensors, so as to achieve the purpose of energy saving and consumption reduction. In addition, the inverter can also reduce the impulse current at start-up, extend the service life of the compressor, and provide a more comfortable temperature environment. For example, a class I energy efficiency variable frequency air conditioner from Midea can save about 30% of electricity during the summer high temperature period, while keeping the indoor temperature stable.

2. Efficient drive for washing machines
   Case background: The working principle of the washing machine is to complete the washing and dehydration process of clothes by rotating the drum driven by the motor. The AC motor used in traditional washing machines is less efficient and noisy.
    The solution: Haier has developed a product called “ Direct drive frequency conversion ” The washing machine is equipped with an efficient permanent magnet synchronous motor and a matching inverter. This design not only improves the efficiency of the motor and reduces energy consumption, but also significantly reduces noise during operation. The inverter can automatically adjust the speed of the motor according to different washing procedures to ensure the best washing effect. In addition, the model is equipped with intelligent sensing technology, which can automatically adjust the amount of water and washing time according to the weight of the clothing, further enhancing the user experience.

3. Precise temperature control of the refrigerator
   Case background: Refrigerators need to work continuously for a long time to maintain a constant internal temperature. However, the accuracy of the traditional mechanical temperature control method is not high, which is easy to cause temperature fluctuations and affect the quality of food preservation.
    Solution: A smart refrigerator from Siemens uses an electronic temperature control system in which an inverter is used to control the operating state of the compressor. The inverter can adjust the working frequency of the compressor in real time according to the data of the temperature sensor inside the refrigerator to ensure that the temperature fluctuation range is controlled within the. Within 1 ° C. This can not only ensure the freshness of food, but also effectively reduce energy consumption. In addition, the refrigerator also has an intelligent recognition function, which can automatically adjust the appropriate temperature range according to the type of food stored, providing users with more personalized services.

4. Energy conversion of solar photovoltaic system
   Case background: As the global attention to renewable energy continues to increase, more and more homes and businesses are beginning to install solar photovoltaic systems. One of the core components of these systems is the photovoltaic inverter, which is responsible for converting the direct current generated by the solar panels into alternating current for incorporation into the grid or direct home use.
    Solution: Huawei's smart PV solution integrates an efficient series inverter to achieve maximum power point tracking (MPPT), ensuring that each solar panel can output maximum power. In addition, Huawei's inverters also support remote monitoring and maintenance, and users can check the power generation situation at any time through the mobile APP to discover and solve problems in time. The program has been widely used in many countries and regions, helping users to significantly reduce the cost of electricity, while also contributing to environmental protection.

5. Brushless motor drive for power tools
   Case background: Power tools such as drills, chainsaws, etc., usually need strong power support, but the traditional brush motor has problems such as short life and frequent maintenance.
    The solution: Bosch has introduced a range of power tools with brushless motors, in which an inverter is used to drive the motor, achieving greater efficiency and a longer service life. The brushless motor combined with the inverter not only eliminates the problems caused by carbon brush wear, but also allows the tool to maintain efficient operation under low load, reducing unnecessary energy waste. In addition, the inverter can also dynamically adjust the motor speed according to the actual demand, which improves the work efficiency and operation safety.

6. Multifunctional integration of home appliances
   Case background: Modern consumers pay more and more attention to the versatility and intelligence level of home appliances, hoping to achieve more functions in a limited space.
    The solution: A smart home hub from A.O. Smith integrates control functions for a variety of appliances, including air purifiers, water heaters, lighting systems, and more. The product has a built-in high-performance inverter to coordinate the distribution of power between the individual devices and ensure the stable operation of the entire system. In addition, the inverter can also automatically adjust the working mode of each device according to the user's use habits, achieving a balance between energy saving and comfort. For example, when poor indoor air quality is detected, the air purifier will automatically turn on and adjust the air volume according to the pollution level; At night, when no one is active, it will automatically enter a low-power standby state.

7. Application of UPS uninterruptible power supply
   Case background: For data centers, hospital operating rooms and other places with high requirements for power supply, any power outage can lead to serious consequences. Therefore, having a reliable UPS system is critical.
    Solution: The three-phase on-line UPS provided by Schneider Electric uses advanced dual conversion technology, in which the inverter is one of the core components. It is able to quickly switch to battery power in the event of a mains interruption, ensuring the continuous operation of critical equipment. In addition, the UPS also has intelligent management and self-diagnosis functions, and can be remotely monitored through the network interface, so that operation and maintenance personnel can timely grasp the device status and prevent potential faults. The inverter design takes into account the characteristics of high reliability, fast response and wide input voltage range, which is suitable for a variety of complex operating environments.

In summary, the application of inverter products in the electrical appliance industry is not limited to simple power conversion, but goes deep into the core functions of the product and technological innovation. By introducing inverter technology, electrical appliance manufacturers can not only improve product performance and user experience, but also actively respond to the social responsibility of energy conservation and emission reduction, and promote the entire industry to be greener