My application requires a very high maximum speed and a very low minimum speed. What can I use?

The Var-Spe speed variator allows you to make adjustments from zero rpm up to the speed of the electric motor with a ratio of 1:30 and up to 1:35 with 60 Hz motors (no inverter or mechanical variator can reach such wide speed ranges).

Can I use the Var-Spe variator in an environment with a lot of dust and humidity?

Yes, the Var-Spe variator is fit to work in harsh environments where dust, humidity and vibrations are limiting factors for other solutions.

Can I move the adjustment handwheel with the motor off?

Yes, the speed adjustment handwheel can be preset with the motor off without damaging any component inside the variator.

Can I start from zero under load?

Yes, the Var-Spe variator is capable of starting from zero rpm with strong breakaway torques. It is therefore an excellent solution for machines with high inertia.

If the machine jams (e.g., material blocking the auger or the conveyor belt), is there some kind of system to protect the drive and the machine?

The Var-Spe variator has an adjustable torque limiter that is triggered in the event of an overload. As soon as the jam ceases, the variator starts working again. If you wish, it is also possible to provide for a more sophisticated solution with a simple and inexpensive pressure switch that can turn the electric motor off or trigger an alarm in case of prolonged jams.

I need to vary speed remotely with a 4-20mA signal. What alternative is there to an inverter?

We can supply our variators with remote controls. In this case, an electronic board will monitor the variator adjustment system that allows using a 4-20 mA reference signal (other possible signals are 0-10V, potentiometer, digital signals). Click here to learn more.

I have an internal combustion (diesel) engine instead of an electric motor. Can I use it anyway to drive the variator?

Of course. Our variator can be supplied with male input shaft to be connected via pulley ratio to the power output of the diesel engine. Contact Var-Spe for more details.

I need to send my machine to faraway countries where it is not easy to find workers specialized in electronics. What can I do?

Our variator is a system that is simple and reliable. It needs no skilled labour for use or to restart it after a machine breakdown. It is intuitive and easy to maintain (oil change).

Are Var-Spe variators available in inches (NEMA)?

Yes, the K series is available in NEMA version, with shafts and flanges in inches (56C, 143TC, 145TC, 182Tc and 184TC). Click here to see the sizes.

I am looking for an alternative to the inverter for Atex environments.

Var-Spe variators can be supplied in accordance with the ATEX directive, providing a simple and affordable solution. Click here to learn more.

My machine needs to be installed in an area where electricity is not stable or even where there is no electricity at all and it is necessary to use power generators. An inverter becomes a problem in these cases. What can I use?

The Var-Spe variator has no issues linked to poor stability of the electrical power supply. So it is a simple and reliable solution in these cases.

I have an application where it is necessary to work with dynamic braking.

Our variator can also work with dynamic braking. Contact Var-Spe for more information.

I need to do many reversals of the rotation and this involves a series of issues with the electric motor. What can I do?

Using the adjustment systems of Var-Spe variators, you can quickly reverse the output shaft without reversing the electric motor that always rotates in the same direction and at the same speed.

via Cordellina, 81 36077 Tavernelle, Altavilla Vicentina Vicenza – ITALY Tel: (+39) 0444 572011 Mail: info@varspe.com
via Cordellina, 81
36077 Tavernelle, Altavilla Vicentina
Vicenza – ITALY
Phone: (+39) 0444 572011
Email: info@varspe.com