Reducing the Electricity Consumption of Electric Motor-Driven Systems (EMDSs)

EMDSs are widely used in various industrial, building, and appliance applications. Pumps, fans, air compressors, conveyor belts, lifts, and air conditioning systems are all examples of mechanical operations that benefit from the power-generating ability of EMDSs. However, EMDSs always run at full spinning speed under continuous power even when the end device requires very little, so this has led to a plenty of electricity waste. Therefore, variable-frequency drives (VFDs) have been utilized to accelerate and decelerate the spinning speed of EMDSs.

By varying the voltage and frequency from the utility, VFDs can adjust the power factor to control motor speed and torque so as to ensure that load requirements are met, saving energy and enhancing efficiency.

To properly manage and centralize VFD and EMDS control, a network management system (NMS), SCADA, and PLC are usually utilized to connect to an EMDS and VFD. However, this requires the operator to overcome the problems that are typically encountered when using different protocols; for example, PLCs usually support Ethernet protocols such as Modbus TCP whereas VFDs tend to use Modbus RTU.

To enable communication between Ethernet and Modbus RTU devices, the Ursalink industrial cellular router could serve as Modbus gateway for PLC and VFD, allowing the PLC to transmit commands to the VFD and controlling the spinning speed of the EMDS, which would be useful for applications like pumps and conveyor belts.


Application Example


Benefit & Features

  • Based on the spinning speed, the conveyor belt speed is adjusted accordingly.
  • EMDS would no longer need to run at full power, save energy and cost.
  • Ethernet, cellular, Wi-Fi supported for connection redundancy.