What’re the knowledge supplement of bridge girder launcher?
Frequency converter of bridge girder launcher is not suitable for any condition, to use it, you must learn more about load, environmental demand and frequency converter itself.
1. Load type and frequency converter selection. Load driven by motor is different; the demand on the frequency converter is also different.
Draught fan and pumps belong to common loads, having the simplest demand on the frequency converter, it can be used only the frequency converter capacity is equal to the motor capacity; crane type load, it mainly features large starting impact, so certain allowance is demanded on the frequency converter. need to use brake unit or common guide line; nonuniform load, choose frequency converter capacity according to load; load with great inertia such as centrifugal machine and others, they will vibrate and give energy feedback as starting with large load inertia, so choose frequency converter with larger capacity to speed up starting and avoid shocking.
2. Long-term low speed running, the motor heating value is high, please use motor with independent fan, or use the way to increase reduction ratio or use 6 grade motor to reduce turning speed, keep the motor move at a higher running frequency.
3. Frequency converter installation place must meet the demand of environment, or it will cause a trouble or shorten service life; usually the distance between frequency converter and drive electrode should be less than 50m, to use the frequency converter in a longer distance, you need to reducer carrier frequency or add output choker.
