07/22/2026Delta and YUNG TA Pump Advance Pump System Energy Savings with MSI Series Motors
As net-zero initiatives, rising electricity costs, and motor efficiency regulations continue to advance, energy efficiency has become critical to operating cost optimization and long-term competitiveness. For long-running applications such as HVAC, process cooling, water supply and drainage, and industrial water circulation, pump system efficiency and control methods directly affect system stability and operating costs. Companies are therefore shifting evaluation criteria from motor power, durability, and price to energy efficiency, load adjustment capability, and long-term operational stability. YUNG TA Pump, a leading pump manufacturer in Taiwan, has specialized in pump R&D, manufacturing, and maintenance services for over 50 years. Its solutions serve commercial and office buildings, hospitals, schools, retail outlets, and electronics plants, with a focus on HVAC pumps and circulating water pump applications. In recent years, YUNG TA has expanded from an equipment supplier into a system integration solution provider, helping customers enhance pump performance and operational stability through hydraulic system design, efficiency curve matching, on-site piping assessment, and control method evaluation. In many existing pump systems, equipment was originally selected with excessive safety margins, causing pumps to operate away from their Best Efficiency Point (BEP) for long periods. Since variable-frequency control was not yet widely adopted in earlier systems, some sites still use fixed-speed systems, in which pumps run at full speed after start-up and flow is adjusted by valves. This not only wastes energy but also increases equipment wear. Even after upgrading to high-efficiency equipment, issues such as oversized selection, poor piping configuration, or insufficient cleaning and maintenance can still prevent the system from operating within an efficient range. To address these challenges, YUNG TA partnered with Delta and adopted its PMa Synchronous Reluctance Motor MSI Series. This configuration integrates YUNG TA’s high-efficiency pumps with Delta’s AC motor drives and control technology. By combining high-efficiency hydraulic design, motor drive, and intelligent variable-frequency control, the system can adjust flow, head, and motor speed based on actual load demand, helping pumps run closer to the BEP and maintain efficiency across different load conditions. Delta’s MSI Series Motor combines permanent magnet and synchronous reluctance motor characteristics and delivers high efficiency, low losses, and low temperature rise. With IE4 to IE5 efficiency levels, the series is well suited for long-running, variable-load applications such as HVAC, process cooling, and circulating water systems. Compared with induction motors, MSI motors can maintain high efficiency under medium- and low-load conditions. When paired with Delta’s AC motor drives, the system can achieve the highest IES2 efficiency class. In addition, Delta integrates dedicated MSI motor parameters into its AC motor drives. With quick configuration modules and corresponding databases, motor-drive matching can be completed efficiently, reducing on-site tuning complexity. The system can also use inputs such as pressure, differential pressure, chiller signals, or cooling tower temperature differences to adjust speed based on requirements. For parallel or alternating pump operation, Delta AC motor drives and control systems can support multi-pump control, enhancing overall operating efficiency and management flexibility. Benefits of Delta’s PMa Synchronous Reluctance Motor MSI Series: Enhanced System-Level Energy Savings: By closely matching pump design, MSI motors, and variable-frequency control technology, the system adjusts speed and output based on load demand, helping eliminate energy waste caused by fixed-speed operation. Compared with induction motors, MSI motors feature nearly zero rotor losses, enabling the system to reduce operating energy consumption by 18%–33% under specific conditions such as light-load or variable-speed operation. Enhanced Efficiency, Stability and Operating Quality Under Variable Loads: With high efficiency, low losses, low vibration and low temperature rise, MSI motors maintain high efficiency under medium- and low-load conditions during long operating hours, while helping enhance equipment operating quality and stability. This makes them suitable for HVAC, process cooling, and water circulation applications. Easier Installation and Replacement: With the same power rating, MSI motors can be one to two frame sizes smaller, saving installation space. They are also compatible with standard induction motor frame sizes, simplifying equipment upgrades. Pairing a Delta MSI motor with its Pump Drive MP300 Series enables a compact integrated solution with a smaller cabinet footprint and less wiring. To meet different pump application requirements, the MSI Series Motors can be paired with Delta’s Open-Loop Variable-Torque Standard Drive VP3000 Series to support commercial HVAC, wastewater treatment, and industrial utility applications. It can also be paired with Delta’s Fan/Pump Vector Control Drive CP2000 Series to meet multi-pump control requirements, helping high-tech electronics plants, commercial buildings, hospitals, and other facilities build complete energy-saving systems. For long-running and variable-load applications, pump system energy savings depend on more than a single equipment upgrade. The key lies in the overall matching of pumps, motors, AC motor drives, and control systems. By combining YUNG TA’s pump selection and on-site application expertise with Delta’s MSI motors and variable-frequency control and automation technology, this approach helps end customers balance energy savings, stable operation, and management needs. Moving forward, Delta will continue working with industry leaders to advance high-efficiency pump solutions and support the industry’s energy-saving and sustainable goals.
