SPINDLE-DRIVES - ACCESSORIES

COMMUNICATION FIELDBUS INTERFACES

• RS 232 – Modbus-protocol
• RS 485 – Modbus-protocol
• Profibus – DP – V1
• CANopen
• DeviceNet
• ProfiNet
• EtherCat
• EtherNet VA Bus TCP

SPEED FEEDBACK TECHNOLOGIES

Standard Sensor Systems
• Incremental signals 5V / TTL and 24V / HTL
• Resolver with an additional output that emulates a digital incremental rotary encoder with a square-wave signal.

Absolute encoder systems
• SinCos
• Endat 2.1 with SinCos-track
• Hiperface
• SSI (optional with TTL RS-422 or SinCos-track)

EMI-Filter Technology

The use of frequency converters generates high-frequency voltages that have a negative effect on the mains supply in the form of disturbances. In order to reduce this electromagnetic interference, EMI filters are used in the input of the converter, which are divided into different interference-emitting categories C1 - C4 according to EU standard 61800-3.

The EMC filters are consistently available from 0.25 KW - 1200 KW and in different construction variations (substructure - side construction variant).

Mains Chokes

Mains chokes reduce the proportion of low-frequency interference (harmonics) and thus relieve the mains supply by compensating for the reactive power distortion caused by this. The connected loads are protected by limiting the starting current and do increase their lifetime. The line choke product portfolio includes extensive consistency for all power ratings with short-circuit voltages of 4% uk.

Advantages at a glance:
• Reduction of current harmonics (THDi)
• Protection of the mains supply against disturbances
• Compliance with the required harmonic limit values according to the European reference standard EN 60555
• Reduction of reactive power consumption
• Increasing the interference immunity of your system

Braking Resistors

Kinetic braking energy is generated If the speed of an AC motor that is operated via a frequency inverter is reduced. In this case, the motor works as a generator and feeds this energy back into the intermediate circuit of the inverter. This does increase the intermediate circuit voltage of the frequency inverter. This increase is permissible up to a specific voltage threshold. If this voltage threshold is exceeded, this excess voltage must be dissipated via external devices in order to rule out interference with the frequency drive. This can be possibly done by using braking resistors. The excess energy is absorbed and dissipated in the form of heat via the braking resistor.

The stainless steel wire resistor is housed in an aluminum case with a larger surface area that allows good heat dissipation.

• Spring coiled resistance element
• Protection class IP5X
• Compact size, cabinet-free use possible, elegant design
• High degree of protection against moisture, dust, solvents and splashing water
• Excellent resistance to mechanical shock and vibration
• 0.1 – ~12 kW power range
• 2 kV isolation level

S-Series

Due to its spiral shape, this type is perfect for short-term overloads. Heated wire, thanks to its spiral shape, absorbs any expansion and returns to its colder form.

• Spring coiled resistance element
• Galvanized steel housing / protection class IP20
• Stainless steel housing / protection class IP23
• Cable entries are with a watertight brass gland
• 0.5 – ~30 kW power range
• 3 kV isolation level

E-Series

The resistance element is in the form of a stainless steel strip plate. This strip board is wound vertically onto an electroceramic frame. The large cross-section and fast cooling capability provide an optimal solution for high-power, low-resistance braking resistors.

• Edge-wound resistive elements
• Zinc plated steel body for indoor use
• Stainless steel housing for outdoor use
• Protection class IP23
• Available for forklift transport and roof lifting eyes
• Most preferred for high power crane applications
• 20 – ~150 kW power range
• 3 kV isolation level

G-Series

G Series braking resistors are manufactured in blocks by connecting them in series or in parallel with the desired power and resistance value through the stainless steel grid resistors specially designed for the desired current density.

• Grid resistance element
• Galvanized steel housing / protection class IP20
• Stainless steel housing / protection class IP23
• Most preferred for high power crane applications
• All terminals are housed in an aluminum (IP65) terminal box with an easily removable cover
• Cable entries are with a watertight brass gland
• 20 – ~600 kW power range
• 3 kV isolation level

Basics for dimensioning braking resistors

Calculation of the duty cycle

Br_on: Regenerative phase, braking resistor is switched on
Br_off: Normal operating phase, braking resistor is off
T_on: Regenerative phase time (It will be accepted continuously if it is longer than 60 seconds)
T: Cycle time (After more than 120 seconds, it is taken over continuously)
ED%: Duty cycle