On Wed, Nov 26, 2014, at 05:32 PM, John Kasunich wrote: > Nicklas may be on to something here. > > Have you entered the nameplate data from the motor into the drive? > > If the drive thinks it is a 230V 50Hz motor, but it is really a 230V 200Hz > motor, you have a problem. > The drive will apply four times the proper voltage to the motor, which will > make the motor draw a > lot more current than it should. Then the drive current limit will try to > prevent overcurrent by slowing > down - which is why you don't get over 8Hz. > > Slowing down to reduce load is a perfectly reasonable thing for the drive to > do, but if the problem > is that the V/Hz curve is wrong, then it won't help. > > Can you point us at an online manual for the drive? I thougth you posted > info for both the drive > and the motor but I'm not seeing it when I read back in the thread. > > John Kasunich >
OK, I found the message where you linked to the motor instruction manual. Parameter 01-00 MUST be set to 18. All of the other settings (0 to 17) are for 50 or 60Hz motors and will badly overvoltage a 200Hz motor. Parameter 01-02 should be set to 200Hz Parameter 01-03 should be set to 100% (assuming that the line voltage is the same as the nominal motor voltage) Parameters 01-04 thru 01-09 allow the V/Hz curve to be modified. For now, I would keep it linear. Set them as follows: 01-04 = 100Hz 01-05 = 50% 01-06 = 50Hz 01-07 = 25% 01-08 = 10Hz 01-09 = 5% Parameter 01-10 is for low speed boost to overcome IR drops in the windings. I would start by setting it to zero. If you need more low-speed torque, increase it cautiously - I would not exceed 2%. I would set 01-11 to 0.0Hz I'm not sure about 01-12 - probably would leave it at the default value, whatever that is John ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
