Nidec Mentor MP105A4 / MP105A4R (105A) Industrial DC Drive

Nidec Mentor MP105A4 / MP105A4R (105A) Industrial DC Drive

The Nidec Mentor MP105A4 and MP105A4R are premier high-current DC drives designed to provide state-of-the-art control for heavy-duty industrial motors.

Combining the proven reliability of DC technology with the advanced digital control platform used in Nidec’s leading AC drives, the MP105 series is the professional choice for both new installations and system retrofits.

Motor field control

Built in field controller as standard in every Mentor MP

Gives excellent field control for the majority of DC motors

Reduces the need for external components

An external motor field controller is recommended when:

The required field current is greater than that offered by the standard drive, up to 25 A. For example, older motors with low field voltages

The field is required to be forced down more quickly than is possible with a standard half controlled field bridge

Applications can be implemented with simple field current reversal, without armature reversal, if machine dynamics can still be met

Control Techniques Windows-based software packages connect using Ethernet, CTNet, Serial or USB connections. Ethernet communications allow the drives to be accessed remotely, anywhere in the world.

Product Introduction

The MP105A4 (2-quadrant, non-regenerative) and MP105A4R (4-quadrant, regenerative) are 105A rated drives within the Mentor MP family.

These drives are engineered to maximize motor performance while minimizing energy consumption.

The regenerative "R" model is particularly valued for its ability to return energy to the AC supply during motor braking, making it an eco-friendly and cost-effective solution for high-inertia loads.

Technical Parameter Table

Product Advantages and Features

Galvanic Isolation: A patent-pending safety feature that isolates the power circuits from the control circuits, protecting sensitive PLC and HMI equipment from high-voltage spikes.

High Performance PLC: Features an onboard programmable controller (SyPTLite) that can replace a micro PLC for localized machine logic.

SmartCard Backup: Includes a plug-in SmartCard for easy parameter cloning and machine upgrades without the need for a PC.

Field Control Flexibility: Comes with an 8A internal field controller as standard, capable of intelligent field weakening for 90% of standard DC motor applications.

Expansion Slots: Three universal option slots allow for seamless integration of Fieldbus (Ethernet, Profibus, DeviceNet), additional I/O, and advanced feedback devices.

Unique Product Description

The MP105A4 series stands out due to its "Legacy Link" architecture.

It was specifically designed with the same footprint and terminal layout as the legendary Mentor II drives.

This allows factories to upgrade their infrastructure to modern digital standards in a matter of hours rather than days, as no mechanical modifications or cabinet drilling are typically required.

Other Models in the Same Series

The Mentor MP range covers a vast spectrum of power requirements:

MP25A4(R): 25A - Entry-level industrial.

MP75A4(R): 75A - Medium torque applications.

MP210A4(R): 210A - Heavy industrial automation.

MP1200A4(R) to MP7400A: High-power modular systems for large-scale mills.

Application Cases

Extrusion Lines: Providing precise torque control for plastic and rubber extruders.

High-Speed Centrifuges: Utilizing the regenerative braking of the MP105A4R for rapid cycle times.

Metal Processing: Controlling wire drawing machines and small rolling mills.

Material Handling: Driving heavy-duty hoists and gantries in port terminals.

Installation and Maintenance

Installation: The MP105 utilizes Frame Size 1. It should be mounted in a clean, dry enclosure with adequate airflow. Use high-speed semiconductor fuses (refer to the manual for specific I²t ratings) to protect the SCRs.

Maintenance: The drive features "Intelligent Fan Control," which only runs the cooling fans when necessary.

This reduces dust accumulation. Regularly inspect the heat sink for blockages and verify that all power connections remain torqued to specification (especially in high-vibration environments).

Diagnostics: The integrated LED keypad provides real-time status and trip history, allowing for rapid troubleshooting of issues like "Phase Loss" or "Field Loss."