EMHEATER Dynamic Braking System Product Range

Dynamic Braking Systems

TCGC offers the following EMHEATER VSD Dynamic Braking System products:

• Brake Units
  • EM-BU2: For 30~45kW Drives (Light Duty) – with matching resistor/s
  • EM-BU3: For 55kW Drive (Light Duty) or 30~45kW Drives (Heavy Duty) – with matching resistor/s
  • EM-BU3H: For 75kW Drive (Light Duty) or 55kW Drive (Heavy Duty) – with matching resistor/s
  • EM-BU4H: For 90~132kW Drives (Light Duty) or 55kW Drive (Heavy Duty) or 2 units for Heavy Duty 160~200kW Drives – with matching resistor/s
  • EM-BU5H: For 160~220kW Drives (Light Duty) or 90~132kW Drives (Heavy Duty) or 2 units for a Heavy Duty 220kW Drive – with matching resistor/s

*1.5kW up to 22kW: No Break Unit Required (only require a resistor)

Each system consists of a Brake Unit with Porcelain Windings. For the smaller systems, Aluminium Housed Braking Resistors can be used instead of the Porcelain Windings.

These systems are used for dissipative energy (cheap and simple method) by converting regenerative energy into thermal energy (burn off energy). Smaller VSDs include a built-in switch (IGBT) to divert extra power to a resistor – external units are thus only needed to burn off extra energy. If there is a large amount of regenerative energy or the VSD does not have a built-in braking switch, external braking systems could thus be required.

• These systems can release the energy regenerated during motor speed regulation (via brake resistance) to produce enough braking torque to ensure normal operation of the transducer and other devices.
• These systems are popular for use in cable/wire drawing machines, cranes, elevators, production machinery, mine hoists, centrifugal and oil pumps in oil field, etc.

Generally used for industrial applications where quick stopping is required which could cause the DC bus voltage to rise (over voltage). It is thus required where the regenerated energy needs to be dissipated quickly to manage the DC bus voltage to prevent the VSD from tripping.

For more details on these products, please visit: https://www.emheater.co.za/peripherals/

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