Bosch rexroth MBT, Manual

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1.3 Motor layout
MBT synchronous torque motors are liquid-cooled kit motors which have
been optimized for high torques. They consist of a stator with three-phase
winding and a rotor with permanent magnets.
Descriptions of the individual modules:
●
MBT: The assembly kit motor consists of the components stator (MST)
and rotor (MRT)
● MST: MBT motor stator
● MRT: MBT motor rotor
The stator consists of a laminated core with multipolar winding, a liquid cool‐
ing jacket and a connection cable. The option "cooling jacket in housing” for
stators contains a cooling jacket with a closed cooling circuit, a mounting
flange and an electrical connection via terminal box or device connector. The
cooling jacket is open at the rear and the rotor is connected to the machine
shaft and bearing.
Two characteristics are available for the motors
●
Characteristics = MRTxx0 / MSTxx0
MBTxx0 motors are charaterized by a high continuous force and a very
high maximum force. The MBTxx0 motors represent classic high-torque
motors.
● Characteristics = MRTxx1 / MSTxx1
MBTxx1 motors are optimized regarding their synchronization character‐
istics. They have a force ripple that is about a factor of 3 lower than that
of the MBTxx0. The magnetic circuit was changed to achieve this. This
results in lower continuous and maximum forces for the same frame
size. These motors can be especially used for grinding applications, for
example.
Using Bosch Rexroth drive controllers, a comparable synchroni‐
zation quality can be achieved with both MBTxx0 and MBTxx1,
e.g. by activating the so-called "cogging torque compensation”.
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Introduction
MBT High Synchronous Torque Motors
Bosch Rexroth AG R911298798_Edition 08