In the first stage of the drive design, you should consider the voltage supply of the drive you require. In the ZEITLAUF^® product range, you have the choice between direct current and alternating current motors (DC / AC motors) for operation on 24 V direct voltage or 230 V / 50 Hz alternating voltage as standard, other voltages on application.

Shaded-pole AC motors
This motor type stands out by virtue of its simple and robust design. Shaded-pole motors are self-starting, maintenance-free and interference-free, but can only be operated in one rotational direction (please state the rotational direction at order stage; Standard = clockwise, facing the gearhead output shaft). Shaded-pole motors are rated IP 00.

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Open-frame induction AC motors
Compared with shaded-pole motors, induction motors offer a higher output power and better efficiency. The ball bearing assembly of the motor shaft guarantees a long lifetime. Open-frame induction motors have protection class IP 00.

Closed-frame induction AC motors
Closed-frame induction AC motors have the same technical features as open frame motors, but also provide protection against the ingress of dust and water in accordance with Protection Class IP 54. 

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Closed-frame three-phase AC motors
Three-phase motors, or three-phase asynchronous motors to be more exact, are designed for use with the three-phase network (3 x 230 V, 50 Hz). They are self-starting and, thanks to the ball bearings used, maintenance-free and durable. Their operating speed is prescribed by the network frequency and can thus only be influenced by means of an additional frequency converter. The direction of rotation can be changed by inverting the polarity of two wire strands.

The three-phase motors provided in the ZEITLAUF^® standard range have been designed for operation in delta connection. Thanks to their sealed motor housing these motors comply with the requirements of protective rating IP 54 (with built-on gear).

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In the field of DC-driven motors, ZEITLAUF^® in its standard program modular system offers the following selection of different motor types.

Mechanically commutated permanent magnet DC motors
Mechanically commutated permanent magnet motors are designed for operation with 24 V direct voltage and provide a nominal torque and a nominal speed with this voltage. The exact motor speed is dependent on the required torque, according to the motor characteristic. Speed control is possible in conjunction with external open-loop control. The lifetime of a mechanically commutated permanent magnet motor is designed for 3000 hours (operating factor CB=1 and nominal load, carbon brush wear).

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Electronically commutated permanent magnet EC motors
EC direct current motors have very long lifetimes due to their electronic commutation (normally over 10,000 hours). Speed control can be achieved via the electronics integrated in most models. Electronically commutated motors normally provide high torque even at lower speeds.
EC gear motors are available even as external and internal rotors. The external rotor is characterised by a high torque and a high mass inertia of the rotor. The internal rotor captivates by its excellent dynamics.

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