Bosch rexroth MCL, Project Planning Manual

Page: 105 / 206

9 Application and construction instructions
9.1 Mode of functioning
The force generation for an ironless synchronous-linear motor, is the same
as the torque generation at rotary synchronous motors. The ironless primary
part (active part) has a winding; the secondary part (passive part) has perma‐
nent magnets.
Both, the primary part and the secondary part can be moved.
Realization of any traverse path lengthcan be done by stringing together sev‐
eral secondary parts.
Axis construction The MCL motor is a kit motor. The components primary and secondary
part(s) are delivered separately and completed by the user via linear guide
and the linear measuring system. They are mounted into the machine or sys‐
tem.
The construction of an axis fitted with a linear motor normally consists of
●
Primary part with Hall unit
● one or more secondary parts with permanent magnets
● Length measuring system
● Linear guide
● Energy flow
● Slide or machine construction
For force multiplication can be two or more primary parts mechanically cou‐
pled, arranged in-line. For further information see chapter 9.13.2 "Several
motors per axis" on page 113 .
Only the primary and the secondary part(s) belong to the scope of
delivery of the motor. Linear guide and length scale as well as fur‐
ther additional components have to be made available by the
user.
9.2 Motor design
9.2.1 Design primary part
The primary part consists of an u-shaped aluminum primary part carrier
which bears the coil body and is molded with plastic resin. This mold serves
for mechanical property of the MCP. It is no protection against humidity, for‐
eign bodies or touch of electrically active parts. Due to the mold process,
sometimes small blowholes can occur on the surface of the mold. They are
not relevant for the function and mechanical property of the motor. The motor
cooling happens due to the thermal couplingof the primary part on the ma‐
chine and via the natural convection.
MCL Ironless Linear Motors 97/197
Application and construction instructions
R911330592_Edition 06 Bosch Rexroth AG