MMotors electric motors for the main hoist lifting mechanism

Electric Motors for Hoist Main Lifting Mechanisms: Reliability and Power

The electric motor is the "heart" of any lifting equipment. The MA series three-phase induction motors, featuring an integrated brake, are specifically designed to drive the main lifting mechanisms of wire rope and chain electric hoists. They ensure smooth and safe load lifting in demanding industrial environments.

Features of MA Series Hoist Motors

The motors listed in the table are optimized for crane and hoist systems operating in intermittent duty cycles. Their key characteristics include:

S4 Duty Cycle (240 starts per hour): These motors are designed for frequent starting and braking—standard requirements for lifting operations. They feature a 40% duty cycle (cyclic duration factor). 

Reliable Braking System: The letter "B" in the model designation indicates an integrated conical or disc brake. This ensures an immediate stop and secure load suspension in the event of a power failure. 

Brake Variants: Models with the "AC-7" (frame size 112) and "AC-8" (frame size 132) designations are equipped with a modern AC brake (400/230 V), offering enhanced durability and ease of maintenance. 

Wide Power Range: The product line includes everything from compact single-speed motors starting at 0.75 kW (for light-duty hoists) to powerful two-speed units up to 8.0 kW (for heavy-duty crane systems). Two-speed models (e.g., MA 132 M - 12/4B) enable micro-drive operation for precise load positioning.

How to Choose the Right Electric Motor? When selecting a motor for a hoist, consider the following parameters:

Power (kW) and rotational speed (min⁻¹): These must strictly correspond to your hoist's load capacity and required lifting speed. 

Starting and braking torque (N·m): Braking torque must always exceed the rated load torque to ensure 100% safety (the table lists minimum and maximum ranges). 

Overall and mounting dimensions: Ensure that the selected type (e.g., MA 90 S or MA 112 M) matches the gearbox flange of your hoist.

Please consult the specifications table for detailed technical data. Whether you are upgrading crane equipment or replacing a failed motor, MA series motors offer an optimal solution, combining European quality with a long service life.