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DC Injection Brakes

Dynamic Brakes for AC Motors 4-315KW, 220-690V


 
Solid State Motor Brakes provide fast, smooth, frictionless braking of squirrel cage motors by injecting controlled DC current into the motor windings, after mains contactor has opened. This induces a stationary magnetic field which exerts a braking torque on the rotor.
 
 The DC BRAKE is the ultimate replacement for the old electrical braking systems such as Reversing (which may result in reversing the motor rotation) or Regenerative braking(which requires resistors to absorb the energy).
 
 The DC BRAKE can be used with mechanical brakes to softly bring the motor speed to zero before operating a mechanical brake.

Motor size DC Brake Dimension Weight
3AC 400 V Current (A) W H D kg
7.5 kW dcBrake  17 65 190 105 1.3
15 kW dcBrake  31 65 190 114 1.3
30 kW dcBrake  58 65 190 114 1.3
55 kW dcBrake 105 154 280 168 5
90 kW dcBrake 170 154 280 168 5
110 kW dcBrake 210 154 280 168 5.4
160 kW dcBrake 310 224 384 222 12
200 kW dcBrake 390 224 384 222 12
  
 Typical Applications
  • Machine tools
  • Circular saws
  • Fast stopping of high inertia loads
  • Safety brakes
  • Large flywheel applications


Advantages at a Glance
- Reduced stopping time - To increase production rate in machine tools and high inertia loads
- Reduced stopping time - To increase safety in hazardous machines
- Soft, smooth stopping, preventing wear and tear of mechanical parts
- Adjustable braking torque, matching load size and required stop time
- Auto stop, reducing motor heating
- Maintenance free, highly reliable operation     
- Easy installation in electrical switchgear  
  
Standard Rating 
    - Voltage 230, 400 V 10-390 Amp
Setting 
    - Braking torque determines the DC current level injectioned to the motor windings
    - Two operating modes (Auto or Manual)
 
Auto mode ; DC injection stops automatically when motor stops.
Manual mode ; DC injection stops after the pre-adjusted braking time. This mode can be used to hold the load at stand still.

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