Why Choose Variable Frequency Drives for Accurate Motor Control

August 16, 2024

The extreme loads placed on electric motors in heavy industrial applications require a durable, built-for-purpose control system to both lower system stress and reduce energy consumption. Optimizing speed and torque control enables delivery of a precise level of power, based on the requirements at a particular moment in the process.

For more than 25 years, Industrial Service Solutions has engineered and delivered motors and drives factory matched by an experienced team of engineers and technicians.

Our Variable Frequency Drives (VFD) provide significant performance and reliability advantages over conventional liquid resistance starters for medium-voltage (MV) and low-voltage (LV) applications, including:

Benefit One – Industry-Leading Low Input Current Harmonics

The electric utility grid operates most efficiently if the connected loads do not distort or shift the current waveform. Unfortunately, when AC power is converted to DC from rectification, the current is distorted, contains high frequencies, and gives the impression of a low power factor due to the resulting harmonic content. Most AC drives convert power to DC as the first part of the conversion process to variable voltage and frequency. The resulting high distortion can create issues with other loads connected to the same grid.  ISS’s drive solutions have one of the lowest harmonic footprints in the industry by providing built-in harmonic mitigation filters and specially designed transformers.

Benefit Two – Higher Quality Waveform

ISS 2.4kV or 4kV medium voltage drive solutions can be applied to standard industrial medium voltage motors designed for power line operation without derate, thanks to six power conversion cells. These cells produce a motor-friendly three phase, near-sinusoidal waveform utilizing seventeen voltage steps to level output.

Benefit Three – Best in Class Components

Every medium voltage and low voltage drive assembled by ISS is custom designed to meet the industry-specific needs of the specified application. During the design phase, ISS carefully selects the right components to meet customer and industry requirements.

Benefit Four – Higher Efficiency Standards

ISS delivers one of the highest guaranteed efficiency numbers in the industry, approximately 97%, thanks to the best in class components of our drive assemblies.

Benefit Five – Higher Reliability

ISS utilizes extended diagnostics techniques to allow technicians to monitor each inverter module individually, minimizing unplanned downtime.

Benefit Six – Custom Cooling Options

We can design a custom cooling package to meet any requirement, utilizing both liquid cooled and air cooled drive components.

Benefit Seven – A True Turnkey Solution

ISS operates one of the largest motor test stands in North America, enabling each of our transformer/drive/motor setups to be fully tested before delivery. This unique step ensures the VFD drive is optimally tuned to prevent power line flicker while ensuring maximum efficiency from the motor.

Benefit Eight – User-Friendly Design

Our engineering team is specifically focused on AC drive design, delivering the most compact footprint possible while preserving ease of access for maintenance. Optional modular drive designs simplify cell replacements, while also enabling third-party control access for remote monitoring and control.

Benefit Nine – Remote Monitoring Capability

Our Spectare® Intelligent Platform takes condition monitoring to the next level with real-time data, deep learning algorithms, and advanced analytics. Spectare transforms data into actionable insights, empowering better decision-making for improved operational efficiency.

Benefit Ten – Dedicated, Nationwide Support

With more than 50 locations nationwide, ISS provides 24/7 service and support expertise to ensure reliable motor and drive performance.