Electronic industrial motor operator control system
AssigneeMechanical Ingenuity Corp.
InventorHoward Beckerman
Life of this patent
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Abstract
This invention discloses an electronic control system for an Industrial Motor Operator that uses standard steady state logic to improve reliability in rough service wet and dirty environments. It includes means of providing electronic snow limit to close limit sensing removing the need for two switches and radically improving its accuracy. A low voltage switch reverses the high voltage motor wires and at the same time reverses the open limit, close limit, and snow limit sensors mechanical positions. It discloses a system using lamps to indicate that the power wiring is connecting to three-phase motors in the correct sequence or that single-phase motors have their windings correctly phased.
Claims8
A motorized door/gate operator the improvement comprising;
- a logical means connected such that at least one input produces an open-output-signal and all other inputs disables the open-output-signal;
- a logical means connected such that at least one input produces a close-output-signal and all other inputs disables the close-output-signal;
- said open-output-signal connects to inverting means that disables the close logical means, thereby disabling the close-output-signal;
- an open-to-close delay circuit, arranged such that it delays the close-output-signal only after receiving the open-output-signal, otherwise, no significant open-output-signal delay is present;
- a close-to-open delay circuit, arranged such that it delays the open-output-signal only after receiving the close-output-signal, otherwise, no significant open-output-signal delay is present;
- a first switching means that reacts to the open-to-close delay output signal to supply power line voltage to a motor causing it to rotate in one direction;
- and
- a second switching means that reacts to the close-to-open delay output signal to apply power line voltage to the motor causing it to rotate in the opposite direction.
A motorized door/gate operator the improvement comprising:
- a close limit of travel sensing means connecting to change the logical operation of obstruction sensing from opening a motor if obstructed to stopping the motor if obstructed;
- the close limit of travel sensing means also connects to a delay circuit, arranged such that it delays the close limit signal forming a virtual-close-limit signal;
- the virtual-close-limit signal connects to stop rotation of the motor in the close direction;
- and
- an open limit sensing means connects to stop rotation of the motor in the open direction.
Dependencies are inferred from the claim text.