Door Operator for Controlling a Door and Method of Same

A door operator for controlling operation of a door, the door operator having a motor to open the door against a spring force, said door operator further comprising:

• a door position sensor for transmitting a signal indicative of door position;
• and
• a controller for:
• opening the door to a first position at a predetermined angle;
• measuring the current to hold the door at the predetermined angle;
• converting the measured current to an equivalent force of the motor acting on the spring, which represents the spring force;
• determining a torque value acting on the door based on the spring force;
• releasing the door to a second position at a predetermined angle
• measuring the time for the door to reach the second position at a predetermined angle
• calculating a door moment of inertia based on the torque applied and the time for the door to reach the second position at a predetermined angle

A door operator for controlling operation of a door, the door operator configured to operate in a manual mode wherein a user provides opening power or in a powered mode using a motor for converting electrical energy stored in a chargeable battery to open the door and to act as a braking load to control door closing speed when charging the chargeable battery in a generator mode during door closing, said operator further comprising:

• a nonvolatile door position sensor for transmitting a signal indicative of door position;
• and
• a controller for:
• receiving the signal from the nonvolatile door position sensor;
• determining the door position and a door speed;
• comparing the door speed to a desired door speed based on a door speed-position profile and generating a door speed error signal;
• minimizing the door speed error signal by adjusting the braking load resulting from charging the chargeable battery using the motor as a generator.

A door operator assembly, comprising:

• an operator unit mounted to a first position, relative to the door, by a first mounting bracket;
• an arm linkage connecting said operator unit and a second position, relative to the door;
• said arm linkage being mounted at said second position by a second mounting bracket;
• and
• an operator unit comprising a roller clutch to disengage the motor during manual door opening and engage the motor on door closing or on power opening.

A door operator assembly, comprising:

• an operator unit mounted to a first position, relative to the door, by a first mounting bracket;
• an arm linkage connecting said operator unit and a second position, relative to the door;
• said arm linkage being mounted at said second position by a second mounting bracket;
• and
• a tapered coupling mechanism to attach the door arm to the output shaft

A door operator assembly, comprising:

• an operator unit mounted to a first position, relative to the door, by a first mounting bracket;
• an arm linkage connecting said operator unit and a second position, relative to the door;
• said arm linkage being mounted at said second position by a second mounting bracket;
• and
• a symmetrical cam which loads a spring in the same manner regardless of direction of output shaft rotation.
• an operator unit which has a symmetrical design to accommodate mounting on either a right hand or a left hand door