12/26/2018 2:08 AM | |
Joined: 5/24/2018 Last visit: 11/11/2022 Posts: 3 Rating: (0) |
Ok, I understand , it’s not good idea with slip-ring motor in this case, I’d like to know if somebody has experience of commissioning S120 with this motor and explore a question. Is it necessary to change slip-ring induction motor ( which is new and good) for squirrel cage for using with S120 ? Although, slip-ring motor has bigger air-gap and lesser cos ϕ by comparing with squirrel cage, what else ? More reactive power for S120 , so what? Ok, I will use squirrel cage motor. First part of my question is about speed range. I can’t find any information about speed range of induction drives with Sinamics S120 (vector control with sensor). I don’t understand “The speed can be controlled right down to 0 Hz (standstill)” like in “Sinamics S120 Function manual”. In my case, induction drive 400 V 200 kW of mine hoist machine must provide speed range minimum 1:70. It means, the drive must provide nominal torque at frequency 0,7 Hz and below with good dynamic response.Of course, in mode vector control with encoder. Thanks for Your answers and assistance. |