Nidec MP25A4 / MP25A4R (25A) Industrial Driver

Nidec MP25A4 / MP25A4R (25A) Industrial Driver

Item# MP25A4R

Control Techniques

DC Drives, MENTOR MP Series

Mentor MP DC Drive, 240/480 VAC Input 25 Amps Output

Mentor MP is Control Techniques’ 5th generation DC drive and integrates the control platform from the world’s leading intelligent AC drive, Unidrive SP.

 This makes Mentor MP the most advanced DC drive available, giving optimum performance and flexible system interfacing capability.

Note: – Mentor MP has been engineered as an easy replacement for Mentor II. With the same footprint it is so easy to migrate to the new Mentor MP platform!

Greater motor field control

Built in field controller as standard

Gives excellent field control for the majority of DC motors

Reduces the need for external components

Enhanced field control with FXMP25 (Optional Extra)

The FXMP25 may be controlled digitally by using a standard RJ45 connection, allowing set-up by standard drive parameters

The FXMP25 can also function in standalone mode using its integrated keypad and display

Enhanced system design

The heatsink cooling fans are intelligently controlled and only run when required, thus increasing reliability and reducing maintenance

Eighteen different option modules allow customisation of the drive, including fieldbus, Ethernet, I/O, extra feedback devices and motion controllers

The drive system designer is able to embed automation and motion control within the drive, eliminating communications delays that reduce performance

Fast set-up, configuration and monitoring

Quick and easy to set-up

Can be configured using optional removable keypads

Advanced autotune features help you get the best performance from your machine

PC software and Smartcard tools for rapid commissioning

Intelligent networked system with CTNet

Program inbuilt controller with SyPTLite

Develop tailored solutions for applications modules with SyPTPro

Option modules for all common Industrial Ethernet, fieldbus networks

Retro-fit projects

Easy integration with your existing motor, power supply, application equipment and communication networks has been ensured from the design stage

Mentor MP brings performance and possibilities to your application with minimum migration costs

Ease of migration

Mentor MP has been designed so existing Mentor II customers can easily migrate to the new platform

All power terminal locations and mounting points have been retained

Mentor MP has a much smaller frame size than the 900 A Mentor II with paralleling options to offer high power density

CT Soft has a built in migration wizard to assist with the transfer of drive parameters and programs

Smaller cable requirements make connections within the cubical easier. Construction of a custom-made bus-bar is not required

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

The Nidec MP25A4 and its reverse-rotation counterpart, the MP25A4R, represent a high-performance series of DC brushless motor drivers.

These units are engineered for precision control in automated environments, balancing a compact form factor with robust power delivery.

Product Introduction

The MP25A4 series is a versatile industrial driver specifically designed to pair with Nidec’s high-torque brushless motors.

The "R" designation in the MP25A4R typically indicates a specific rotation orientation or specialized wiring configuration for bidirectional control.

These drivers are renowned for their high efficiency, low heat generation, and reliability in continuous-duty cycles.

Technical Parameter Table

Product Advantages and Features

High Power Density: Delivers a consistent 25A output in a space-saving housing.

Advanced Thermal Management: Integrated heatsink design allows for peak performance without external cooling in most standard applications.

Precision Regulation: Utilizes Nidec’s proprietary control algorithms for smooth speed transitions and minimal torque ripple.

"Plug & Play" Integration: Features standardized terminal blocks for rapid deployment in existing PLC-controlled systems.

Unique Product Description

What sets the MP25A4 series apart is its "Silent Drive" architecture.

 Unlike standard industrial drivers that produce significant high-frequency noise, Nidec has optimized the PWM switching frequency to reduce acoustic resonance. 

This makes it the preferred choice for medical equipment and office automation where noise pollution must be strictly controlled.

Related Models & Same Series

While the MP25A4 is a mid-to-high range current driver, the series accommodates various power requirements:

MP10A4: 10A version for smaller actuators.

MP15A4: 15A version for medium loads.

MP50A4: Heavy-duty 50A version for high-torque industrial robotics.

MP25A4-S: Specialized version with enhanced braking resistors.

Application Cases

AGVs (Automated Guided Vehicles): Used for precise wheel drive control and steering in warehouse logistics.

Medical Pumps: Providing consistent, vibration-free fluid delivery in laboratory settings.

Conveyor Systems: Synchronized multi-axis control for high-speed packaging lines.

Semiconductor Equipment: Cleanroom-ready motor control with minimal EMI interference.

Installation and Maintenance

Mounting: Ensure the unit is mounted vertically to maximize natural convection through the heatsink fins. Leave at least 20mm of clearance on all sides.

Wiring: Always use shielded cables for signal lines (Hall sensors/Encoder) to prevent electromagnetic interference.

 Ensure the ground terminal is connected to the central chassis ground.

Maintenance: Periodically check terminal screws for loosening due to machine vibration. 

The driver is solid-state, so no internal lubrication or parts replacement is required; simply keep the heatsink free of dust build-up.