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  • No : 22088
  • Release Date : 2018/08/22 16:30
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DC injection brake

I have the following questions concerning the DC injection brake:
1. I heard that the DC injection brake puts stress on the motor. Why is this? Also, in intermittent operation using a heavy load, how should I configure the braking setting?
2. I heard that the DC injection brake puts stress on the motor. Why is this? Also, in intermittent operation using a heavy load, how should I configure the braking setting?
Category : 

Answer

1. The braking torque can be considered 50% of the motor rated torque.

2. The largest stress the DC injection brake gives to the motor is the motor heat generation.
A self-cooling motor rotates a fan with motor rotation to cool the motor itself.
When the motor stops using the DC injection brake, the fan also stops and the motor is not cooled sufficiently. Pay attention to the temperature rise of the motor.
The electronic thermal O/L relay built in the inverter can prevent the motor from overheating at low frequency with which the cooling ability of the motor is lowered.
Therefore, set Pr.9 (Electronic thermal O/L relay) to the rated motor current and use the motor so that the electronic thermal O/L relay is triggered.
Product Name
Inverter, magnet motor drive
Series
Others

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