Dimming stream 6060 or 6080?

[duvivier]

Hello,

Is it possible to dim the 6060/6080 and obtain the same efficiency of the 6100/6000 or they are not made for efficient dimming?

In other words I would like to know if there is any tecnical difference between the speed controllable 6100/6000 and the not controllables one's like the 6060/6080 (besides the output they provide) that would made them not appropriable to be connected to a controller that would vary the output power sent to the pumps.

Thanks!

 

[blgreef]

the 6000 and 6100 are dc driven while the 6060 etc are AC pumps. As such you can not speed control the AC units.

I assume the 6000 and 6100 are speed controled by modulating the drive signal to the motor block and also the power, hence the blue electronic control box.

As to the AC pumps I would not recommend placing these on an electronic dimmer. Most diming units are not designed to drive a High inductive load. Also since most dimmers work by changing the duty cycle you may find that a pump will not respond well to such an AC feed.

Sure Roger will confirm.

 

[duvivier]

So the 6000 and tha 6100 have a transformer? Interesting... I guess they are probably working at a different voltage also...

About the dimmer I was thinking of getting one different that those for home lighting use, specially designed for High Inductive Loads and maybe get a module to control it but I guess is better to buy the 7095 with the 6100/6000. I wanted to do my custom made controller...

I thought that the 6000 and 6100 had some sort of dimmer not an electronic transfomer...

Thanks!

 

[blgreef]

the 6100/6000 have a electronic drive unit ( blue box) and are run on low voltage DC. SO i assume the frequency and power supplied to the motor block can be controled to give speed control etc.


the 6080 etc are just an ac motor block and run at line voltage, and I think their speed is set by the frequency of the AC supply.
There may be ways to control these motors but.

Changing the drive frequency will also change the impedance of the motor coil, this can allow the coil to draw more current and hence over heat and trip any thermal prtection built into the motor coils, and Tunze have thermal cut outs in the pumps.

but i am sure Roger will confirm

 

[rvitko]

Exactly, you cannot reliably control the speed of synchronous motors. People have experimented with such ideas and they generally don't work, the motor has to start at it's native frequency and then it sometimes can be adjusted but it can ruin the motor and frequency modulators tend to be very expensive- usually starting at $500.

 

[rvitko]

Regulating the voltage just turns it off or on and will ruin the motor, the motor has to have at least 95-100V to start and at 85V will not run at all, just draw power and overheat. Even at 100V it is doing the same RPMs as at 120V. This is for 120V motors.