Rm-materials-handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist TMU Mot Manuel d'utilisateur télécharger pdf (Page 17)

LM TMU I&M MANUAL/EN/06.15.2009

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This document and the information contained herein, is the exclusive property of R&M Materials Handling, Inc., and represents a non-public, confidential and proprietary trade secret

that may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of R&M Materials Handling, Inc.

3.1 Motor

The motor insulation is class F and the degree of protection is IP55.

3.2 Description of the Gear Reducer

3.2.1 TMU VFD Gear Reducer

A single reduction gear reducer is used together with the 100/120 Hz inverter motor. Generally, this gear

motor reducer is used when the capacity of the hoist is greater than 1 ton [1000 kg]. The output pinion is cut

into the output shaft of the gearbox. Gears are lubricated with semi-fluid grease.

The 35 Hz inverter motor is used without a gear reducer. Generally, this gearless motor is used when the

capacity of the hoist is 1 ton [1000 kg] or less. The trolley wheels are directly driven from the motor.

3.2.2 TMU Two-speed Motor Gear Reducer

A single reduction gear reducer is always used together with the two-speed motor regardless of load

capacity. The output pinion is cut into the output shaft of the gearbox. Gears are lubricated with semi-fluid

grease.

3.3 Description of the Brakes

3.3.1 Compact Brake

The Compact brake is integrated into the design of the MF06 inverter motor and is AC operated - without a

separate coil for the brake. An electromagnetic force produced from the energized motor stator winding

releases the brake. Since the MF06 inverter motor is always operated with a TMU VFD that provides

dynamic braking, the compact brake is essentially a holding brake. The brake sets when the motor

decelerates to zero and a spring applies a clamping force.

3.3.2 D.C. Disc Brake

The D.C. Disc brake is mounted to the two-speed motor and utilizes a D.C. coil. The coil releases the brake

disc. Several springs apply the clamping force.

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Rm-materials-handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist TMU Mot Manuel d'utilisateur Page 17

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