Drive arrangement for door operator

A method for controlling a drive arrangement for an automatic door operator of an entrance system having one or more movable door members, wherein the automatic door operator is for causing movements of the one or more movable door members between a closed position and an opened position, respectively,

• the drive arrangement comprising a DC-motor for driving the automatic door operator, a H-bridge and a controller for controlling the drive arrangement,
• wherein the H-bridge comprises a first leg and a second leg, the first leg and second leg both being connected to a first voltage supply line and a second voltage supply line, the first voltage supply line having a higher voltage than the second voltage supply line,
• wherein the first leg comprises an upper first leg switch and a lower first leg switch connected in series and the second leg comprises an upper second leg switch and a lower second leg switch connected in series,
• the DC-motor being connected to the first leg and the second leg between the upper first leg switch and the lower first leg switch and the upper second leg switch and the lower second leg switch, respectively,
• the method comprising:
• switching to an active state of the drive arrangement, wherein the upper first leg switch and the lower second leg switch are activated and wherein the lower first leg switch and the upper second leg switch are deactivated;
• measuring a DC-motor current from the DC-motor;
• comparing the DC-motor current to a first reference current;
• further switching from the active state to a pause state of the drive arrangement, wherein only the upper leg switches or the lower leg switches are activated, when the DC-motor current exceeds the first reference current;
• and
• yet further switching from the paused state back to the active state when the DC-motor current falls below a second reference current.