DCS has higher reliability requirements and puts more emphasis on industry experience and past cases:

369-HI-R-M-F-E-H-E DCS system itself is positioned as system-level software, the most core is the software system or field communication bus, so the head enterprise in the performance of the product is difficult to form a significant gap, the industry’s technology is also mostly around the reliability, such as harsh industrial control high-precision signal acquisition, I/O signal processing and protection technology, hardware-based thermal redundancy technology. Moreover, because the three core downstream of the process industry, namely chemical, petrochemical, and electric power are high-temperature and high-pressure production environments, the reliability requirements are higher than PLC, according to the Ministry of Industry and Information Technology “control system” application plan declaration Guide “, the average trouble-free time of petroleum and petrochemical DCS is greater than 200,000 hours.

At the same time, because the DCS program is more based on the needs of process industry customers in the way of consulting + implementation delivery, participants need to be deeply engaged in vertical industries, such as the control technology for chemical, petrochemical, and the power, so the industry players either have a very long time of case accumulation, or from the downstream customer incubated.

Frequency changer

369-HI-R-M-F-E-H-E

Definition: The frequency converter is a power control device that integrates frequency conversion technology and microelectronics technology to control the AC motor by changing the working power frequency of the motor.

Structure: The inverter consists of four parts: a rectifier unit, a high-capacity capacitor (motor), an inverter and a controller.

369-HI-R-M-F-E-H-E Working principle: The inverter adjusts the voltage and frequency of the output power supply through the internal IGBT breaking to provide the power supply voltage required by the motor, so as to achieve the purpose of energy saving and speed regulation.

Main functions:

(1) Frequency conversion speed: adjust the motor power to achieve variable speed operation of the motor;

(2) Soft start: reduce the starting impulse current, smooth acceleration;

(3) Energy saving effect: in fans, pumps, and oil pumps, when the required air volume and flow are reduced, the use of inverter regulation can greatly save electric energy;

(4) Reduce abnormal equipment failures: reduce voltage fluctuations and reduce the trip failure of voltage sensitive equipment in the same power supply network.