Initial Operation and User Interface
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Operating Manual dryve D1, ST-, DC-, EC/BLDC-Motor Control System - V2.4
Power dissipation value
Horizontal application
𝑃
𝑏𝑟𝑎𝑘𝑒 ∅
= 𝑃
nom 𝑏𝑟𝑎𝑘𝑒
√
𝑇
𝐵𝑟𝑎𝑘𝑒
3 ∗ (𝑇
𝐶𝑦𝑐𝑙𝑒
+ 𝑇
𝑃𝑎𝑢𝑠𝑒
+ 𝑇
𝐵𝑟𝑎𝑘𝑒
)
P
brake
Ø
Average motor braking power produced at a single movement cycle in watt [W]]
P
max brake
Maximal produced motor braking power in watt [W]
T
Brake
Dwell time of the motor in the generator operation state in seconds [s]
(see
“Determination generator operation dwell time”)
T
Cycle
Total duration single movement cycle in seconds [s]
T
Pause
Pause time after single movement cycle in seconds [s]
Determination generator operation dwell time
Generator operation state only at deceleration phase.
Acceleration
Uniform movement
Deceleration
Example:
𝑃
brake Ø
= 314,1 𝑊√
0,3 𝑠
3 ∗ (1,3 𝑠 + 1 𝑠 + 0,3 𝑠)
= 61,6 𝑊
To avoid a thermal overload, it’s recommended to always use a resistor with the next bigger power rating then the calculated
value. At a value of 61,6 W a power rating of minimal 62 W is recommended.
NOTE
Please consider the power derating curves of the resistor supplied by the manufacturer
