Inverter technology strategy in electromechanical control

In the industrial process of the century, the top software and hardware planning for the suspension of frequency conversion skills, first according to the characteristics of the traditional air compressor motor, comprehensively analyze the causes of energy consumption and operation characteristics, so as to plan out the control methods such as frequency conversion skill speed regulation, air skill tightening, pressure sensing skill improvement, etc., according to the control circuit abort motor inverter and the planning of electrical initialization, the control method should be controlled by vector, the vector control principle should be carefully analyzed, and the frequency conversion vector suspension simulation should be viewed. Scientifically change the working parameters of VFD. On the other hand, the tilt control parameters of the VFD are transformed. By controlling the input and output of the VFD with a composite signal, it is possible to add an electrical instrument at the inlet of the container to record the flow signal, and to add an electrical pressure signal to the container, so as to reduce the hazard to machinery and equipment.

Inverter technology strategy in electromechanical control

Inverter technology strategy in electromechanical control

Firstly, a device filter is established in the system line to filter out the disturbance signal of higher harmonics.

The second is to shield the source of disturbance, which is one of the effective ways to resist disturbance, and the detailed method is to shield the output line with a steel pipe. The third is to properly ground the motor, and the grounding point should be separated from the grounding point of other power electrical equipment. Then the line is stopped reasonably planned, the signal line and power line of the motor equipment should avoid the input and output lines of the VFD as much as possible, and the power line and signal line of other equipment should also avoid the input and output lines of the VFD, and the parallel laying should be stopped.

In the end, it is a rational use of reactors, the series circuit in the AC reactor weakens the current in the input circuit to the VFD, and the DC reactor weakens the higher harmonics in the input current.

Before the setting, the higher harmonic content in the motor grid has reached 40%, and after the filter is installed, the higher harmonic content has dropped to 20.6%, especially after three to eight times, it has been lower than the normative content value. In terms of VFD selection, it is necessary to learn to give priority to frequency conversion things with low harmonic content and filters and reactors. When the transformer motor equipment, the control signal cable and its own power cable should have a cable structure attributed to their respective architecture lines, do a good job and shielding methods, stop the line crossing or structure disorder, and the equipment should adhere to the distance and establish the necessary protection methods, and summarize the "win-win" role of both industrial economy and energy saving and consumption reduction.

It is worth creating our own air compressor that the air compressor has been re-planned for the inverter air compressor motor in the world, and the motor has been changed from single-phase electricity in the traditional sense to three-phase alternating current, and has good speed regulation performance. At present, a large number of air compressor motors are consumed and applied in China, and if they want to continue to develop, they must open VFDs for single-phase motors. Finally, the data accounting related to the suspension of the air compressor motor after the transformation is carried out, and the cost analysis is suspended to verify whether the transformed air compressor can be more effective and energy-saving.

Inverter technology strategy in electromechanical control

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