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Brake, Crane & Hoist Motors
Brake, Crane & Hoist Motors
Delta Electricals offers a Brake, Crane and Hoist motors. A brake motor is an integral combination of an AC induction motor and a disc type, fail safe, electromagnetic brake unit. These motors are foot, flange or face mounted or combination of any two. Dimensions are of squirrel cage types are as per IS: 1231 (for foot mounting), IS: 2223 (for flange mounting), IS: 2253 (for face mounting) and enclosure is either totally enclosed fan cooled (TEFC) or totally enclosed surface cool (TESC) with degree of protection IP54, IP55 as per IS: 4691.
A typical unit consists of the following:
- AC high starting torque squirrel cage induction motor
- AC or DC fail safe brake mounted on the non-driving end shield.
- Being simple and rugged-in construction, these motors need very little maintenance – in the rare event of failure, repair is simple and easy
- No separate supply is necessary for brake coil energisation – because the brake coil/s is/are working on AC or on DC and their supply leads are directly connected to the motor terminals
- In case of DC fail safe brake armature coil is energised through rectifier unit which converts AC supply into required DC supply
- Special brake liner is used, which ensures that, the braking torque value remains quite stable throughout the use
- Compensation for liner wear is easily done by increasing the spring tension and adjusting the air gap
- The design of brake motor facilitates a very easy replacement of armature disc and brake liner assembly
- For crane and hoist duty applications brake motors are offered with special rotors
- These rotors are specially suited for S3 and S4 duty normally encountered in hoist and crane applications.
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