DELTA VFD25AMH43ANSAA AC Motor Drive MH300 Series

Product Overview

The VFD25AMH43ANSAA (VFD25AMH43ANSAA) is a high-performance AC motor drive from Delta’s MH300 series. The MH300 is categorized as a "High-Efficiency Compact Drive," specifically designed to offer superior torque control and flexibility for both induction and permanent magnet motors. With an 11 kW (15 HP) output capacity, this drive is perfectly suited for industrial applications requiring dynamic performance, such as machine tools, robotic arms, and high-speed material handling systems. Its compact Frame E design and natural cooling efficiency make it a versatile solution for control cabinets where space optimization is critical.

Technical Configuration

The MH300 series represents a significant advancement in Delta's micro-drive technology. It features a sophisticated control platform that supports both sensorless vector control (SVC) and field-oriented control (FOC) for permanent magnet motors, ensuring high-speed precision and low-speed torque stability. The drive is built for industrial reliability, featuring an IP20 protection rating and an operating voltage range of 323–528 VAC, allowing it to maintain operational stability despite fluctuations in common 460 V industrial power grids.

Technical Specifications

Frequently Asked Questions

What makes the "MH300" series different from the "MS300" series?

While both are compact drives, the MH300 series is built for higher dynamic performance. It offers enhanced high-speed control (up to 2000 Hz in specific modes), superior motor control precision, and a more robust hardware architecture designed to handle more demanding, higher-torque industrial workloads than the entry-level MS300.

Since this drive uses "Natural Cooling," do I still need a ventilated cabinet?

Yes. While the drive does not have an internal cooling fan to clean, the internal heat sink still relies on the ambient air around the drive to dissipate heat. In a tightly sealed, non-ventilated cabinet, the heat will accumulate, potentially forcing the drive to "derate" (reduce its output current) to protect its internal electronics.

Does this drive support Fieldbus communication?

Yes, the MH300 series supports a variety of communication modules (such as EtherCAT, CANopen, and PROFIBUS DP) which can be installed in the expansion slot to integrate the drive into complex PLC networks.

Installation and Operational Best Practices

• Vertical Mounting: The natural cooling design relies on the "chimney effect" to move air over the heat sink. Always mount the drive vertically; mounting it horizontally or upside down will trap heat and cause premature thermal failure.
• Wiring for EMI: To prevent high-frequency switching noise from affecting your logic controllers, always route motor power cables and signal cables through separate metal conduits. Use twisted-pair, double-shielded cable for any analog speed references (e.g., 0–10 V or 4–20 mA).
• Grounding: Due to the drive's operating voltage, you must connect the ground terminal directly to the building's main grounding bus using a low-impedance copper cable. This is essential for safety and for maintaining signal reference stability across your control network