59 of 132
M-SV-001-EN Rev.E
Compressor Components
Figure 55 - Connection to
Stator
3.8 Motor
3.8.1 Function
3.8.1.1 Stator
3.8.1.2 Rotor
3.8.2 Motor Protection
3.8.3 Connections
The motor type employed is a permanent
magnet, synchronous speed motor. The winding
section of the motor is similar in design to a
standard 3-phase star-connected Stator.
The rotor is an integral part of the motor shaft
and is a permanent magnet design that allows
the synchronous characteristic required for broad
range speed control.
Conventional motor protection based on
incoming 3-phase currents and voltage
conditions are inadequate to protect the motor
and electronics in the event of mishap due to the
total separation of the motor windings from the
incoming 3-phase current by the DC conversion.
Therefore, the bulk of protection is based
on measurements taken by the Inverter and
calculations derived from those measurements.
Motor currents and voltages displayed in the SMT
cannot be directly compared or correlated to
incoming 3-phase AC values.
All Stators employ overheat cutout protection
utilizing thermistors in each winding. In
all models except the TT300/TG230, Stator
temperature initiation and control of the motor
winding/shaft cavity cooling solenoid is provided.
See Figure 55 (Connection to Stator) to identify
connections to the motor.
The Stator operates as the force that drives the
shaft, utilizing the HV DC pulses provided to the
motor windings by the Inverter.
Motor Bus Bars to High
Power Feed Through
Motor
Thermistor
Terminals
Inverter to
Motor Bus Bar
Summary of Contents for Turbocor TT-300
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