Anyone Familiar With Yaskawa Vs Controller Cvsr-404h

[AB2005]

Dear All,

 

We have many Yaskawa Eddy current motors at our machines which have VS Controllers CVSR-404H, input = 220V, 50HZ, output, 80VDC, 5A. VS controller controls the speed of motor by sending voltage to motor’s clutch coil and receives feed back from Tacho Generator (30VAC/1000RPM). It has 04 variables BIAS, STAB, GAIN & MAXSPEED.

I was fine tuning a machine’s speed by adjusting variables of controller but problem is that I have no detailed manual of this controller which helps me for understanding functions of these variables. I know about function of GAIN & MAXSPEED, but don’t know about BIAS & STAB.

Thanks in advance.

[MichaelHayes]

Dear All,

 

We have many Yaskawa Eddy current motors at our machines which have VS Controllers CVSR-404H, input = 220V, 50HZ, output, 80VDC, 5A. VS controller controls the speed of motor by sending voltage to motor's clutch coil and receives feed back from Tacho Generator (30VAC/1000RPM). It has 04 variables BIAS, STAB, GAIN & MAXSPEED.

I was fine tuning a machine's speed by adjusting variables of controller but problem is that I have no detailed manual of this controller which helps me for understanding functions of these variables. I know about function of GAIN & MAXSPEED, but don't know about BIAS & STAB.

Thanks in advance.

 

I am also having problems with a system which contains JVOP-03, JGSM-03, Several JVOP-02 and CVSR-404H and if anyone has data sheets for these items, particularly the CVSR, I would appreciate hearing from you.

Michael Hayes

Sydney Australia

[tranzilengineers]

BIAS is to ensure output shaft speed is zero when your reference is zero i.e. when Set Speed Pot is at zero, output speed needs to be zero or you adjust it to zero by BIAS preset. Otherwise if you want the output to be at certain minimum speed even while reference is zero, you may accordingly adjust BIAS to have a minimum speed at zero speed reference. STAB is to adjust speed stability and is generally set at 60-70% to ensure a better speed regulation. Although not in much use nowadays, we have replied here because we make similar speed controllers & torque controllers for eddy current motors (still popular for certain applications like coal feeders on a boiler, baggase feeders in co-generation sugar mills & small time paper mills).

[Brandon]

Yaskawa VS Mini series has been obsolete for several years now. That's probably why you are not finding much info online.

 

The following page has the manual & some details listed.

 

http://www.clrwtr.com/Yaskawa-VS-mini-Drives.htm