Failure analysis of Rexroth drives

Create Date: 2024-8-30 12:03:23|Source: Rexroth/Rexroth

Common Failure Analysis:

1) Overcurrent fault: Overcurrent fault can be divided into acceleration, deceleration, and constant speed overcurrent. It may be caused by the acceleration and deceleration time of the inverter is too short, the load is abruptly changed, the load is unevenly distributed, and the output is short-circuited. In this case, it is generally possible to extend the acceleration and deceleration time, reduce the sudden change of load, add energy consumption braking elements, carry out load distribution design, and check the line. If the load inverter is disconnected or the overcurrent fault is faulty, it means that the inverter circuit of the inverter has been looped and the inverter needs to be replaced.

2) Overload faults: Overload faults include frequency conversion overload and motor overload. It can be caused by the acceleration time being too short, the grid voltage being too low, the load being too heavy, etc. Generally, it is possible to extend the acceleration time, extend the braking time, check the grid voltage, etc. The load is too heavy and the selected motor and inverter cannot drag the load, or it may be caused by poor mechanical lubrication. If the former is the case, the high-power motor and inverter must be replaced; In the case of the latter, the production machinery needs to be overhauled.

3) Undervoltage: It means that there is a problem with the power input part of the inverter, and it needs to be checked before it can be operated.

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