DRIVE EQUIPMENT

Drive equipment consists of motor, control unit and belt. Ostberg provides easy, operationally reliable drive equipment for both constant and variable speed operation. Rotors are driven by a motor mounted on a bracket inside the casing. All rotors are driven by the motor via a belt to the rotor periphery. Rotors Ø<1400 mm are driven by round belts and rotors Ø>1400 are driven by V-belts. All motors are 4-pole with thermal protection.

Ostberg provides three-phase motor as standard, single-phase motor is optional. Belt pulley size and/or gearing are designed to achieve optimum rotor rpm. Optimum rotor speed for heat recovery is 12 rpm, and for moisture recovery (sorption rotors) 20 rpm.

Constant Drive

Constant Drive

Constant drive means that rotor speed remains constant during operation, or is switched off to remain stationary – so called on/off drive.Induction motors with reduction gearing are available in three-phase and single-phase versions. These are mainly used in small units and are available with outputs of 6W, 25W and 40W. The motors have class B insulation and IP54 protection ratings. The reduction gear is life-time lubricated and maintenance-free.

Asynchronous motors with worm gears are available in three-phase and single-phase versions. They are available with outputs between 90W and 750W. The motors have class F insulation and IP55 protection ratings. The worm gears are life-time lubricated and maintenance-free.

Variable Drive

Micromax

Micromax is a standardized, user-friendly control unit with all necessary functions.

Micromax is controlled by 0-10 V input signals.

Rotor speed is proportional to the control unit input signal. If the input signal drops below a set threshold value, the motor will stop.

Micromax is connected to 4-pole induction motors with reduction gears or 4-pole asynchronous motors with worm gears. All motors are three-phase versions equipped with thermo-switches.

Varimax

VariMax is a standardized, user-friendly control unit with all necessary functions. VariMax is controlled by 0-10 V input signals. Rotor speed is proportional to the control unit input signal. If the input signal drops below a set threshold value, the motor will stop. VariMax has a rotation monitor (magnet mounted on the wheel with associated magnet sensor) and built-in cleaning function. The functions can be disconnected via DIP switches.