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| pDrive CX Single - will this inverter run my 3 phase motor? |
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| raynerd:
Cheers for the advice David, i`ve just reset to factory EU settings and starting from scratch. Can you tell me what I should set for: base frequency maximum frequency output frequency I`m still getting the high pitch squeel! Chris |
| raynerd:
This is driving me bonkers - max frequency and base frequency both set to 50hz yet with the motor running and displaying the frequency it is showing only 15hz with a top speed (still deathly slow) a max of 16Hz !! |
| melgump:
I shall now show my ignorance on such matters by asking how an inverter rated to a 0,4w motor is expected to be able to run a motor of 1/3 hp? In my book that is approx. 250w. Just asking! Cheers,Ray. |
| David Jupp:
Couple of thoughts - haven't had time to study the manual.... Base Frequency could be related to the 'clock frequency' of the microporcessor (in the kHz range) - you can sometimes chage this to avoid resonances . So it might not be anything to do directly with Output Frequency. Do you have Jog mode enabled without realising? - check details of the control/digital inputs. If in jog mode the drive will run very slow (and may not allow any/much variation). Exact details vary from manufacturer to manufacturer, and between model ranges - it really is a question of ploughing through the manual. Unfortunately they tend to assume a degree of familarity with control circuitry and/or PLCs. |
| Swarfing:
Chris Set the base frequency to 50hz (mains voltage), set the max to 75 and if that is too slow add a few more hz at a time to max until you start getting to somewhere near your speed requirements. you can go between 100% and 130% of intended motor speed with an inverter. be careful though and don't be greedy. |
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