Drive unit for a door or gate, particularly for a garage door, and method for operating such drive unit

A drive unit for a door or a gate comprising:

• an electric motor;
• a detection unit for detecting the position of said door or gate, said detection unit being coupled to said motor and providing an identical pulse sequence with every rotation of said motor, wherein the duration of one of the pulses in said sequence is different from the duration of the other pulses in said sequence which have the same duration,
• a non-volatile memory in which all detected pulses are stored;
• the electric motor having an electronic control and regulating circuit including an output stage for the electric motor and at least one memory, in which an operational program is stored, said program providing a programmable learning procedure upon initial operation for an opening and closing movement of said door or gate based on said all detected pulses provided by said detection unit;
• and
• at least one safety device for limiting a motor driving torque below one of a maximum value and a threshold;
• at least one program selected from the group comprising:
• a first program providing for operation of opening and closing procedures of said door or gate and for a variable power adjustment of said drive unit,
• a second program, according to which said pulses of said detection unit memorized in said non-volatile memory are processed according to different processes, and
• a modifiable program for power measurement or for modifiable power adjustment at the main closing edge or the secondary closing edges of the door or gate, being provided during a learning procedure at initial operation;
• and
• a progressively adaptable power transfer module that varies at least one setting of the at least one safety device during motor operation,
• whereby the at least one safety device adapts the drive unit to the door or gate.