Nidec Control Techniques MP350A5 / MP350A5R (350A)

Nidec Control Techniques MP350A5 / MP350A5R (350A)

The Nidec MP350A5 and its regenerative counterpart, the MP350A5R, represent a major step up into the high-power Frame 2 category of the Mentor MP series.

Capable of delivering a continuous 350A of armature current, these drives are specifically engineered for high-voltage industrial grids, supporting AC inputs from 500V to 575V.

They provide the heavy-duty muscle required for large-scale industrial machinery while maintaining the digital precision and automation flexibility of the Nidec/Control Techniques ecosystem.

Technical Parameter Table

Product Advantages and Features

Native 575V High Power: Directly supports 575V supplies without the efficiency losses of transformers, making it ideal for large Canadian and North American industrial plants.

Superior Field Control: Unlike smaller frame sizes, Frame 2 units like the MP350A5 include a high-capacity 20A field controller as standard, managing even large, low-voltage field coils with ease.

Regenerative Braking (MP350A5R): Effectively handles massive overhauling loads, such as large cranes or high-inertia fans, by feeding energy back to the grid during deceleration.

Galvanically Isolated Control: Ensures that the high-voltage 575V power stage is completely isolated from the control and communication electronics, preventing system-wide interference or damage.

Automation on a Card: Every unit includes a SmartCard for parameter storage and “cloning,” as well as an onboard PLC for simple logic functions using SyPTLite.

Safe Torque Off (STO): Integrated safety allows the drive to be used in SIL3/PLe safety systems without redundant external contactors.

Application Cases

Large Extruders: Providing the constant torque and high-power delivery needed for large-scale polymer or rubber production.

Heavy Duty Conveyors: Managing the massive starting torque and synchronized speed control required for mining and bulk material handling.

Industrial Presses: Handling the high peak loads and rapid cycling of metal stamping and forging machines.

Crane and Hoist Systems: Utilizing the MP350A5R for vertical lifting where 250 HP of regenerative control ensures smooth and safe load lowering.

Unique Product Description: The “Efficient Giant”

The MP350A5 is often called the “Efficient Giant.” It marks the entry point into Nidec’s open-chassis heavy power range.

Its uniqueness lies in its high power-to-size ratio; it delivers the torque once reserved for massive, room-sized cabinets in a modern, modular Frame 2 design.

It allows legacy mills to upgrade to modern Ethernet-based control without the massive expense of a full motor-room overhaul.

Installation and Maintenance

Open Chassis Safety: Frame 2A is an IP10 (open chassis) design. It must be installed within a secondary enclosure or cabinet to prevent accidental contact with the 575V terminals.

Busbar Integrity: At 350A, the heat generated at contact points is significant. Use copper busbars or high-flex cabling with high-quality lugs, and check terminal torque during every semi-annual PM.

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Intelligent Cooling: The drive features intelligent fans that only run when needed. Ensure at least 100mm of clearance for the air intake at the bottom and exhaust at the top.

Advanced Diagnostics: Use the optional MP-Keypad to view real-time armature and field voltage. This is critical for identifying brush wear or winding issues in the DC motor before a failure occurs.

Other Models in the Same Series

The 575V (A5) series scales from small precision drives to massive industrial controllers:

The Frame 1 Range: MP25A5(R) to MP210A5(R) (25A – 210A)

The Frame 2 Entry: MP350A5(R)

High Power Frame 2: MP470A5(R) through MP1850A5(R) (Scaling up to 1850A)

Related Models & Accessories

FXMP25: External field controller if the motor field requirement exceeds 20A (up to 25A).

SM-Ethernet: Adds support for EtherNet/IP, Modbus TCP/IP, and direct web-server access.

SM-Applications Plus: For complex motion control, such as flying shears or center winders.

CTSoft: The primary PC-based tool for commissioning, tuning, and monitoring the drive’s high-power armature bridge.