LED light bar switching power supply has a circuit to control the switching tube for high-speed switching and cut-off, which converts direct current into high-frequency alternating current to transform the converter to generate one or more sets of voltages required. The reason for converting to high-frequency alternating current is that the efficiency of high-frequency alternating current in the transformer circuit is higher than that of the commercial power supply of 50Hz or 60Hz. Therefore, the switching power supply transformer can achieve a small volume, and it will not be very hot when the switching power supply is working. Compared with the power frequency DC power supply, if the 50Hz or 60Hz is not changed to high frequency, then the switching power supply has no meaning. The switching power supply can be roughly divided into two types: isolated and non-isolated. The power converter, without isolation, does not necessarily have a switching power converter. Compared with the traditional DC power supply, the switching power supply has the advantages of small size, light weight, and high efficiency.
The system to realize the automation of liquid level control is composed of hardware and software. The hardware mainly includes PLC touch screen and related CPU, memory, output and input, power supply and other modules. The on-site measurement includes all kinds of sensors and switches suitable for different on-site conditions. In addition, it also includes audible and visual alarm lights, control buttons and other related equipment. By configuring PLC liquid level display alarm instrument, it can realize the display of industrial field liquid level measurement, the alarm of high and low liquid level, as well as the opening and closing of pumps, valves and other equipment. It can realize unattended automatic workflow, greatly improve the production efficiency, save human cost, and bring about the increase of enterprise benefits, Lay the foundation for enterprises to take the lead in the severe competition in the future. Therefore, in the current situation, whether it is a new project or a transformation project, it is suggested that if conditions permit, starting PLC equipment is the priority.
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