China Wireless modem Manufacturers, Serial server Factory https://blog.dnevnik.hr/zigbeemodule
srijeda, 26.10.2022.
Cellular standards can directly impact the performance
Cellular standards can directly impact the performance, range, ease of development, security, reliability, and implementation cost of scaling IoT in manufacturing. Traditional SIM cards used in cellular IoT devices are limited to a single network operator. They require technicians to manually insert/replace SIM cards, which can lead to deployment bottlenecks, especially in remote areas. These challenges are addressed by newer eSIM platforms that contain a non-removable chip that can download carrier profiles over the air and allow multiple telecom providers to be pre-programmed so devices can choose the best connection.
An IoT device with an eSIM comes with a SIM card and cellular module. These devices offer the flexibility to deploy anywhere in the world and ensure reliable connectivity as they can change carriers without human intervention. These devices benefit machines that monitor complex and hard-to-reach locations and help avoid logistical challenges during movement. All these features contribute to faster scalability of IoT applications.
industrial iot gateway
The benefits of cellular IoT connectivity
Cellular connectivity is becoming increasingly popular for enabling integrated machine-to-machine communications, enabling wireless condition monitoring of industrial assets. This is because cellular IoT connections provide high network reliability. The high data rates (10-100Gbps) at which cellular IoT devices transmit data are not affected by severe weather conditions, and the distance between the base station and the device is much less affected than many other wireless communication options. This is important because cellular connections have the best coverage and ability to avoid overload problems. It also provides greater freedom of movement, helping to gain connectivity even in complex environments where devices are not fixed.
Oznake: serial to wifi converter
nedjelja, 09.10.2022.
Detailed explanation of inverter structure classification and working principle
In our daily life, we often go to places outside the scope of the mains supply. When we want to use some household electronic devices in such places, we will find that our common energy storage devices, such as batteries, etc. , can only provide direct current, and the voltage is usually lower. CAN2.0 Communication Module Therefore, if there is a device that can convert low-voltage direct current into 220V alternating current, it will greatly facilitate our life, and the inverter came into being.
1. Classification
Inverter classification
1. Single-phase inverter
The number of output voltage (current) phases is single-phase, and the frequency is 50HZ or 60HZ. This type of transformer is often used in low load conditions and is less efficient than a three-phase inverter.
2. Three-phase inverter
The number of output voltage (current) phases is three-phase, and the frequency is 50HZ or 60HZ. The three waveforms at the output are the same but 120° out of phase. It can be considered as the output of three single-phase inverters, and the node where the three terminals are connected is the central node.
3. Current Source Inverter
The DC side is a current source, its DC power source has high impedance, and the supplied current is rigid and is less affected by load changes. The output current state of the AC side depends on the switch tube in the inverter.
4. Voltage Source Inverter
The DC side is a voltage source, and its DC source impedance is zero, which is a rigid voltage source. Its AC side output voltage state depends on the switch tube in the inverter.
5. Bridge inverter
Divided into half-bridge, full-bridge and three-phase bridge inverters. Its main structure is based on a half-bridge composed of switching transistors (MOSFET, IGBT, thyristor, etc.).
6. Parallel inverters
A parallel inverter consists of a pair of thyristors, a capacitor (C), a center-tapped transformer (T) and an inductor (L).
7. Series Inverter
A series inverter consists of a pair of thyristors, a resistor (R), an inductor (L) and a capacitor (C).
8. Square wave inverter
The AC waveform at the output end is a square wave.
9. Quasi-sinusoidal inverter
The waveform of the output terminal is an inverter with a stepped square wave, and its waveform is close to a sine wave, which is simpler than a sine wave but more difficult than a square wave.
10. Sine inverter
The output waveform is almost sinusoidal, and the waveform is smoother than the quasi-sine wave.
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