A frequency converter has two synchronous motors. The output gears of the reducer are meshed on a large bearing at the same time. How to ensure synchronization?
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A frequency converter has two motors, and the output gears of the reducer are meshed on a large bearing at the same time. The problem of how to ensure synchronization is very tangled. I have never used this before, and one is powerful enough. This time, the owner was worried that it would not be powerful enough, so he asked us to use two to drive at the same time. The idea was good, but there was a problem in controlling it. 1. If there is a speed difference between the two motors, it will also accumulate on the large gear, causing tooth beating problems. If a synchronous motor is used, instead of using braking to stop, and using free stop, will there be no synchronization problem? 2. In the form of coding feedback, I am thinking that my reduction ratio is very large, 5027: 1, where is the appropriate place to install it.
This control method is somewhat similar to that of a traveling trolley. The traveling trolley cannot be coaxial when traveling on a track. It is common to use a frequency converter with two motors to ensure synchronization and avoid the problem of rail gnawing. It turns out that the driving vehicles I came into contact with did not use encoding. Recently, I saw that the driving vehicles also use encoders. They also use one frequency converter to drive two motors. So, I still have not fully understood the use of this encoder.
Regarding the issue of the driving encoder, there is no controversy about the one-to-two control. The encoder is used for position protection. In addition to the equipment limit switch protection, the encoder records the driving position and exceeds the protection.