SIEMENS
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Siemens NC 62 · 2016
Main spindle motors
SIMOTICS M asynchronous motors for SINAMICS S120
SIMOTICS M-1PH2 asynchronous built-in motors for direct drive – Water cooling
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Overview
Active parts (rotor and stator) of SIMOTICS M-1PH2
asynchronous built-in motors
SIMOTICS M-1PH2 built-in motors for turning machines are
liquid-cooled squirrel-cage AC asynchronous motors. These
built-in motors have been specially developed for variable-
speed operation of main spindles on turning machines.
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Benefits
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Compact design obtained by dispensing with mechanical
components such as coupling, belt drive, gearbox and
spindle encoder
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High power density as a result of liquid cooling
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The absence of drive transverse forces permits extremely
high accuracy on the workpiece thanks to smooth, accurate
spindle motion even at very low speeds.
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Extremely short ramp-up and braking times
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Full rated torque is continuously available, even at standstill
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Simple servicing by replacing complete motor spindles
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Increased rigidity of the spindle drive, achieved by mounting
the motor components between the main spindle bearings
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C-axis compatibility with hollow-shaft measuring system
mounted on the spindle
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Low noise emissions due to absence of machine elements
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Torque is transmitted to the spindle mechanically without
backlash by means of a cylindrical stepped press fit. The rotor
is mounted on the spindle by thermal shrinking. The bond can
be released by pressure-oil injection without affecting the joint
surfaces.
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The rotor with sleeve is pre-balanced and can be removed
and subsequently reinstalled.
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The rotor with sleeve is finished-machined, i.e. the rotor outer
diameter need not be finished after mounting.
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Design
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Application
SIMOTICS M-1PH2 built-in motors are used for machines
requiring an extremely high standard of machining quality,
accuracy and running smoothness
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Turning machines
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Grinding machines
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Technical specifications
Refer to Liquid cooling for a list of cooling unit manufacturers.
Product name
SIMOTICS M-1PH2 built-in motor
Coolant inlet temperature
Because of the formation of
condensation, we recommend
a coolant inlet temperature of
approx. 25 °C (77 °F), depending
on the ambient conditions.
Cooling water pressure at inlet,
max.
7 bar
Coolant flow rate (water)
8 l/min (2.11 U.S. gallons/min.)
Connection thread
Dependent on cooling unit used
Temperature monitoring
2 KTY 84 temperature sensors
in the stator winding,
1
×
as reserve
Stator winding insulation
in accordance with
EN 60034-1 (IEC 60034-1)
Temperature class 155 (F) for a
coolant inlet temperature
up to 25 °C (77 °F)
Recommended motor encoder
Hollow-shaft measuring system
(not included in scope of supply)
Type of construction
(cf. ISO)
Individual components:
Stator, rotor
Motor connection type
Free cable ends with
length of 0.5 m (19.7 in) or
1.5 m (59.1 in)
Balance quality of rotor
in accordance with ISO 1940-1
1PH2093 to 1PH2118: G 2.5
reference speed 3600 rpm
Degree of protection
in accordance with IEC 60034-5
IP00
Rating plate
1 unit enclosed separately
G_NC01_EN_00148b
Hollow shaft
Annular jacket
cooling channel
Rotor
Rotor sleeve
Air gap
stator
© Siemens AG 2016