SEW 760 Series

Products

  • Air Cooled Series
  • Water Cooled Series

The SEW 760 Series of Shakers are matched with the DSA 360K and DSA 400K Series of Power Amplifiers. The Power Amplifier of a Water Cooled System is made in two parts: Armature Power Supply which houses the DC Section, Control Section, and Power Module for the Armature Coil and Field Power Supply which houses the DC Section and Control Section for the Field Coils. A dedicated Water Cooling System which pumps distilled water through the Shaker as its primary path and uses cold water from a Chiller as its secondary path with heat exchangers to cool down the distilled water of the primary path is also provided. Everything is assembled in 19-inch industrial rack of 36-unit height.

Standard Features

  • Aluminium Alloy Casting based Armature Structure
  • Hydrostatic Linear Central Guidance Bearing
  • Rocker based Suspension
  • Trunnion mounted Shaker Body
  • IP-67 Non-Contact Inductive Sensors for:
  • Armature Position
  • Armature Under / Over Travel
  • Shaker Orientation
  • Pressure Sensor based Water Leakage Detection
  • DC + Pneumatic based Auto-Centring of Armature
  • Shaker Body Isolation using Air Bellows
  • System Base Isolation using Rubber Pads
  • 10.1” Coloured TFT Touch Screen based Interface
  • 32-bit Microcontroller based Control Unit
  • Digital Gain Control of 0.1% Resolution
  • Digital Sine Generation of 0.1Hz Resolution
  • Display of Armature Voltage & Current in True RMS
  • Scaled Armature Voltage & Current BNC Output
  • Display of Field Voltage & Current
  • Galvanic Isolation of Analog Input & Output
  • Sensing and Display of Shaker Orientation
  • Auto Start, Stop, & Interlocking of Horizontal Slip Table
  • Multiple User Configurable Interlocks
  • Built-in Diagnostic Tool

Optional Features

  • Thermal Barrier for High / Low Temperature Operation
  • PC based Power Amplifier Remote
  • Automatic Trunnion for Shaker Body Rotation
  • Explosion Proof for Lithium-Ion Battery Testing
  • Field Power Regulation for higher Velocity
  • Long Stroke for higher Displacement
  • Pneumatic based Auto-Centring of Shaker Body
  • Low Frequency Operation with Displacement Sensor

System Specifications

Series SEW 760 – DSA 360K SEW 760 – DSA 400K

System Performance
Armature Diameter
760 mm
760 mm
Sine Force (peak)
24000 kgf (235.4 kN)
30000 kgf (294.2 kN)
Random Force (rms)
24000 kgf (235.4 kN)
30000 kgf (294.2 kN)
Shock Force (peak)
48000 kgf (470.7 kN)
60000 kgf (588.4 kN)
Acceleration (Sine)
90 g
100 g
Acceleration (Random)
70 grms
70 grms
Acceleration (Shock)
180 g
200 g
Velocity (peak)
1.8 m/s | 2.7 m/s*
1.8 m/s | 2.7 m/s*
Displacement (pk-pk)
51 mm | 76 mm**
51 mm | 76 mm**
Axial Resonance
1300 Hz ±5%
1300 Hz ±5%
Useful Frequency Range***
DC to 2000 Hz
DC to 2000 Hz

Shaker Characteristics
Moving Element Mass
266 kg
300 kg
Internal Load Capability
3000 kg
3000 kg
Suspension Axial Stiffness
< 1 kg/mm
< 1 kg/mm
Suspension Cross-Axial Stiffness
3600 kg/mm
3600 kg/mm
Stray Magnetic Field****
< 1 mT (10 gauss)
< 1 mT (10 gauss)
Compressed Air*****
6 bar (87 psi)
6 bar (87 psi)
Shaker Body Mass
15000 kg
15000 kg

Amplifier Characteristics
Power Output
360 kVA
400 kVA
Total Harmonic Distortion******
Typically, 0.5%
Typically, 0.5%
Input Impedance
> 10 kΩ
> 10 kΩ
Input Sensitivity
1 Vrms to 80 Vrms
1 VRMS to 80 VRMS
Signal-to-Noise Ratio
> 80 dB
> 80 dB
Power Efficiency******
> 92%
> 92%

Armature Insert Pattern
Metric: 1 at Centre, 8 at 200 mm PCD, 8 at 400 mm PCD, 8 at 550 mm PCD, 8 at 700 mm

Inch: 1 at Centre, 8 at 8” PCD, 8 at 16” PCD, 8 at 22” PCD, 8 at 28” PCD

Notes:

  • *Peak velocity with reduced field power for Shock
  • **Long stroke option
  • ***Low frequency operation below 5Hz may require body locking or seismic foundation
  • ****150 mm above armature head
  • *****Dry compressed air to be provided by customer at installation site
  • ******Measured on pure resistive load
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