An Energy Conservation Strategy Using Variable Frequency Drive for a Hydraulic Clamping System in a CNC Machine

Airflow measurements are critical for heating, ventilation and air conditioning (HVAC) system operations, energy conservation and fault detection. A fan-head-based fan airflow station, which determines airflow using measured fan head and speed, has been developed. However, the fan-head-based fan airflow station cannot measure the airflow associated with a flat fan head curve. To solve this problem, a motor-power-based fan airflow station is developed in this paper. The motor-power-based fan airflow station determines fan airflow using motor power and speed. Since both the motor power and speed can be directly obtained from the motor Variable Frequency Drive (VFD), no additional sensors are required for implementing a motor-power-based fan airflow station. A motor-power-based fan airflow station was implemented in a laboratory exhaust system. This paper presents the fundamental theory of the motor power-based fan airflow station and the experiment results.

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Optimizing the control and automation of variable torque on 3-phase induction motor using programable neuro logic controller and variable frequency drive

Nigerian Journal of Technology ◽

10.4314/njt.v39i3.30 ◽

2020 ◽

Vol 39 (3) ◽

pp. 887-895

Author(s):

J.N. Eneh ◽

P.C. Ene

Keyword(s):

Energy Conservation ◽

Induction Motor ◽

Step Response ◽

Variable Frequency ◽

Transfer Model ◽

Variable Frequency Drive ◽

Current Function ◽

Conservation Rate ◽

Nonlinear Input ◽

Load Cells

This paper presents optimizing the control and automation of variable torque on 3-phase induction motor using programmable neuro logic controller (PNLC) and variable frequency drive (VFD). The system was designed by developing a transfer model of the nonlinear input current from the load cells and feed to an improved PLC model for an approximate current function which is identified by the VFD with respect to the controlled load torque to power the 4.07KW rated 3-phase induction motor. The models were implemented using control system toolbox, neural network toolbox and simulated with Simulink in MATLAB. From the simulation of the improved controller model, the step response time performance of the PLC was improved from 2.25s to 1.22s with the PNLC.The simulation result of the VFD controlled 3-PIM motor shows that 37.07% of energy (power) was conserved compared to a characterized system with 20% energy conservation rate. Keywords: 4.07KW 3-phase induction motor, PLC, ANN, VFD, Energy conservation rate

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Teknik Konservasi Energi Pada Pompa Submersible Dengan Menggunakan Variable Frequency Drive

Jurnal ELTIKOM ◽

10.31961/eltikom.v1i2.25 ◽

2018 ◽

Vol 1 (2) ◽

pp. 84-93

Author(s):

Haji Sofyar M.Eng

Keyword(s):

Energy Consumption ◽

Energy Conservation ◽

Simulation Model ◽

Induction Motor ◽

Centrifugal Pump ◽

Variable Frequency ◽

Variable Frequency Drive ◽

Cost Of Energy ◽

The Cost ◽

The Relationship

Energy conservation is beneficial not only to reduce consumption and the cost of energy consumption, but also to give a better impact on the environment. In this study a simulation model is created which is a reflection of the relationship con-dition between variable frequency drive (VFD), induction motor and centrifugal pump. By creating a simulation model will be able to know the potential savings that will be provided if the variable frequency drive is used.

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