Variable Frequency Drives (VFD)

Yu-Chen System Exclusive New Offering

The PowerFlex® family of AC Variable Frequency Drives (VFDs), including both low-voltage and medium-voltage solutions, delivers robust performance across a wide range of low- and medium-voltage applications. With comprehensive power options and innovative embedded features, our PowerFlex drives bring enhanced efficiency, reliability, and functionality to diverse industries and critical processes.

• Improve energy efficiency of motor-driven systems

• Boost production throughput with PowerFlex VFDs

• Increase yield, extend uptime, and achieve significant energy savings

Low-Voltage PowerFlex® Drives

The PowerFlex® series offers an extensive portfolio with multiple control modes, rich feature sets, flexible options, compact packaging, global voltage ratings, and broad power ranges. This high degree of flexibility enables tighter alignment with operational requirements, ultimately driving higher overall equipment effectiveness (OEE) and throughput.

PowerFlex Compact Drives provide a cost-effective, general-purpose solution ideal for applications requiring basic speed control and straightforward system integration.

PowerFlex Standard and High-Power Drives deliver a comprehensive set of features and application-specific parameters, making them well-suited for demanding applications that require precise speed, torque, or position control.

PowerFlex 753 Drive

The PowerFlex 753 AC drive is specifically engineered for general-purpose applications, offering multiple configuration options, rich functionality, and the added benefit of seamless integration.

Standard embedded I/O on the PowerFlex 753 makes it a highly cost-effective choice for OEMs and system integrators. It helps reduce engineering effort, accelerate machine time-to-market, and meet end-user demands for improved productivity and enhanced machine safety.

Yu-Chen System – Ultra-Pure Water (UPW) System Modernization Success Story

A leading semiconductor fab’s Ultra-Pure Water (UPW) system was originally controlled by an aging Mitsubishi A-Series PLC platform that had been in operation for over 20 years. With no remaining system integrators capable of supporting the legacy Mitsubishi hardware, most operations had degraded to semi-automatic mode, creating substantial operational risk.

The standalone, obsolescent system exposed the customer to unacceptable downtime risk — sudden, unannounced shutdowns were a real possibility. Apart from Yu-Chen System (YCS), virtually no SI firm was willing to undertake full replacement of the Mitsubishi PLCs due to the extreme risk associated with an always-on UPW system that cannot tolerate unplanned outages.

YCS engineers invested significant effort in reverse-engineering and deeply understanding the legacy Mitsubishi PLC logic. We then developed detailed process flow diagrams, performed Allen-Bradley PLC programming (using ControlLogix platform), conducted rigorous testing, and executed on-site commissioning & debugging.

The modernized architecture consists of:
– 6 sets of Allen-Bradley ControlLogix (CLX) PLCs
– Dozens of Allen-Bradley PowerFlex 753 drives dedicated to critical water pump applications

The entire migration project spanned approximately 9 months from kick-off to full cutover. The new system has been successfully commissioned and is operating reliably with zero unplanned downtime to date.

Yu-Chen System – Your Trusted Partner for Customized Turnkey Automation Solutions

With decades of accumulated experience in bespoke control system development and integration, Yu-Chen System provides end-to-end, one-stop service — from legacy system assessment, detailed design, programming, FAT/SAT, commissioning, to long-term after-sales support — solving even the most challenging modernization and reliability issues in high-availability environments.