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The braking techniques employed by ATS starters and ATV drives are as follows:
DC injection is used to slow down loads driven by motors powered by starters or drives, but this is also performed by specific braking modules.
With a starter, you limit the voltage rise and fall ramp times applied to the motor, rather than the starting and braking times.
Square D used to sell products with an EMB part number and Telemecanique used to sell products with an ATP part number. Schneider no longer sells or supports either of these product ranges.
(Square D and Telemecanique are old Schneider brands)
Braking with braking resistor
This type of braking is only used by variable frequency drives.
The excess energy associated with braking is stored in the drive's DC bus capacitors and increases its voltage. Any excess energy above a specific voltage threshold is discharged into the braking resistor and then dissipated by the Joule effect.
Selecting the correct resistor
Our ATV71 range of drives includes catalogue references for:
Example: For an ATV71 11 kW drive, a 0.2 kW standard resistor and a 9.8 kW hoisting resistor is available.
It is also possible to use specially customised resistors, in which case, the following details must be specified to the supplier: