Renowned fire power monitoring system can be customized for processing

Current sensors are active modules such as Hall devices, operational amplifiers, and final power transistors, all of which require a working power supply and power consumption. 1) The output ground terminal is centrally connected to the large electrolysis for noise reduction. (2) The capacitance is uF, and the diode is 1N4004. (3) The transformer depends on the power consumption of the sensor. (4) The working current of the sensor. Direct inspection type (without amplification) power consumption: 5mA large; Direct inspection amplification power consumption: large ± 20mA; Magnetic compensation power consumption: 20 output current; The high consumption working current is 20 times the output current. The power consumption can be calculated based on the consumed working current.

With the emergence of this new series of sensors, LEM is expanding other miniaturized current sensors for isolated measurement of AC and DC currents. The new HMSR product integrates a primary conductor (minimizing power loss), a miniature magnetic core, and a customized ASIC, allowing direct current measurement and ensuring certain insulation performance. This new product series includes six different rated current levels: 6A, 8A, 10A, 15A, 20A, and 30A, with a measurement range of up to 2.5 times the rated current, and is packaged in SOIC16. The standard product provides analog voltage outputs of different sensitivity levels, with the corresponding output voltage for the 5V power supply version being 800mVIPN.

There are many types of voltage sensors. Although they are both voltage sensors, the actual measurement is actually current. Traditional voltage sensors can be roughly divided into three categories: voltage sensors; Grating isolation (actually an optocoupler) voltage sensor; Isolation voltage sensor with high resistance. Of course, some voltage sensors have other principles, but the front-end of Jiangsu sensor manufacturers can also measure voltage by measuring current. Due to different principles, there may be many differences in accuracy, bandwidth, isolation level, and other performance, especially in response time.

Traditional detection components are limited by many factors such as specified frequency, specified waveform, and response lag, and cannot adapt to the development of high-power converter technology. The new generation of Hall current and voltage sensors, as well as the integration of current and voltage sensors with true effective branch AC/DC converters, have become well-known detection modules. In addition, the development of electronic power devices towards high frequency, modularity, componentization, and intelligence will make device designers adept, which will be a fundamental change in the history of electronic power technology.

Renowned fire power monitoring system can be customized for processing

In recent years, the global sensor market has been steadily growing, with companies from various countries competing to accelerate the development and industrialization of sensors. Eastern Europe, the Asia Pacific region, and Canada have become the fastest-growing regions in the sensor market, while the United States, Germany, and Japan remain the countries with a large distribution of sensor markets. On the other hand, with China entering the era of industrialization, especially the rise of new energy industries such as photovoltaics and electric vehicles, the demand for sensors in China has gradually improved. According to data statistics, the size of China's sensor market reached 110 billion in 2015 and will reach 211.5 billion in 2020. The domestic sensor market is highly dependent on imports, especially in the field of high sensors, with the proportion of imported medium and high sensors in China reaching as high as 80%. Due to cost pressures, some customers tend to prefer domestic brands.

The power monitoring system is not complicated and can be considered a relatively simple system compared to other fire related systems. However, the simpler the system, the more prone it is to errors. Next, let's talk about the common problems and errors that occur during the drawing process of the fire power monitoring system. Firstly, it should be clarified that our drawings are intended for others to see and convey information. If we cannot make others understand our drawings, then they are worthless. How can we make the drawings we design valuable? Let's first dig out the bad habits in design here. If these bad habits are changed, then the drawings can clearly express the design ideas and content, and others will understand and have value.

Especially high-power point tracking (MPPT), which is an important part of solar inverter systems, can maximize the utilization of the electrical energy generated by photovoltaic panels (PV) after tracking. It will adjust the current and voltage based on temperature, sunlight, and the total impedance of the system. When a small disturbance signal is injected (using disturbance observation method), the control system continuously analyzes the system output. Then, MPPT analyzes the generated power (by monitoring voltage and current signals) and derives the parameters to be changed to achieve MPPT (high power point). MPPT obtains the appropriate voltage for DC/DC converters by changing the pulse width modulation (PWM).

In most cases, civilian melting sensors have strong resistance to external magnetic field interference. Generally, the magnetic field interference generated by a current twice the working current Ip between 5-10cm from the module can be ignored. However, when there is stronger magnetic field interference, appropriate measures should be taken to solve it. The usual methods are: ① Adjust the module direction to minimize the impact of the external magnetic field on the module; ② Add a magnetic field resistant metal shielding cover on the module; ③ Select modules with dual Hall elements or multi melting elements; ④ The optimal measurement accuracy is obtained at the rated value. To achieve optimal accuracy when the measured current is far below the rated value, multiple turns can be used on the primary side, i.e. IpNp=rated ampere turns. In addition, the temperature of the primary feeder should not exceed 80 ℃.