Frequency converter of overhead crane  is not suitable for any condition, to use it, you must learn more about load, environmental double girder overhead crane

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; non-uniform 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. installation place of frequency converter must meet the demand of environment standard, or it will cause a failure or shorten service life;

distance between frequency converter and drive electrode is not more than 50m generally, with a longer distance, it needs to lower carrier

frequency or add output reactor, then it can work normally.