SIEMENS
6/90
Siemens CR 1 · 2015
6
Drive systems
SIMOTRAS HD AC power controller
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Overview
The SIMOTRAS HD AC power controller is used for the open and
closed-loop control of three-phase slip-ring rotor motors for cra-
nes and hoisting gear.
SIMOTRAS HD is a fully-controlled digital, 3-phase thyristor con-
troller in a compact design with stator phase control and elect-
ronic field reversal with ratings of between 20 and 580 kW for the
open and closed-loop control of slip-ring rotor motors for cranes
and hoisting gear.
All converters are equipped with a basic PMU operator panel in
the door of the unit. The PMU can be used to perform all the ad-
aptations, settings and measured value displays required for
commissioning. The basic unit can also be operated via its serial
service interface using a commercially available PC and suitable
software. All device settings (e.g. controller parameters, limits,
etc.) are stored in the device in a non-volatile memory.
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Benefits
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Compact design
with the open-loop control integrated in the drive
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Favorably-priced solution in the retrofit area
by using slip-ring rotor motors that already exist in the plant or
system
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Application
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Hoisting, slewing, luffing, trolley and long travel gears as well
as single and multi-motor drives
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The devices are ideally suited to crane modernization applica-
tions, because the existing components such as motors, resis-
tors, cables, etc. can usually be reused.
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Devices are available in special versions for high ambient
temperatures up to 65 °C.
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Design
The SIMOTRAS HD device comprises:
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The power unit
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Basic electronics
Power unit
The power unit is a 3-phase thyristor AC power controller in a
compact design. Two additional thyristor modules in the lateral
branch of the power unit enable reversing of the rotating field,
and therefore 4Q operation of the drive. Current transformers in
2 phases generate the actual current value for current control.
Basic electronics
The basic electronics contains the gating unit that activates the
thyristors. It generates line-synchronized firing pulses. The con-
trol electronics is isolated from the line potential via firing pulse
transformers.
All device settings (e.g. controller parameters, limits, etc.) are
stored in the device in a non-volatile memory. Adjustment is per-
formed digitally, via the operator panel on the device. The values
are therefore easy to reproduce at any time.
Depending on the load conditions, the converter operates in mo-
tor mode (driving direction of rotating field, 1st and
3rd quadrant) or in braking mode with reversing current braking
(2nd and 4th quadrant). Through omission of the conventional
stator contactors, fast torque reversal is possible, with resulting
high control dynamics.
Supplementary modules
See the Electronic options.
© Siemens AG 2015