Dual machine arrangement
AssigneeOtis Elevator Company
InventorsWei Wei, Kyle Connolly
Life of this patent
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Abstract
A dual machine arrangement is provided for a hoist assembly of an elevator system. The dual machine arrangement includes dual machines, each comprising a motor and a sheave, which is rotatable by the motor, a coupling by which respective ends of the sheaves of the dual machines are connected and drive circuitry configured to synchronize reverse operations of the dual machines to raise or lower a load.
Claims20
A dual machine arrangement for a hoist assembly of an elevator system, the dual machine arrangement comprising:
- dual machines, each comprising a motor and a sheave, which is rotatable by the motor;
- a coupling by which respective ends of the sheaves of the dual machines are connected;
- and
- drive circuitry configured to synchronize reverse operations of the dual machines to raise or lower a load.
A dual machine arrangement for a hoist assembly of an elevator system, the dual machine arrangement comprising:
- a first machine comprising a first motor and a first sheave, which is rotatable by the first motor in a first direction;
- a second machine comprising a second motor and a second sheave, which is rotatable by the second motor in a second direction, which is a reverse of the first direction;
- a coupling by which respective ends of the first sheave and the second sheave are connected;
- and
- drive circuitry configured to synchronize reverse operations of the first motor and the second motor to raise or lower a load.
A dual machine arrangement for a hoist assembly of an elevator system, the dual machine arrangement comprising:
- a first machine comprising a first motor and a first sheave, which is rotatable by the first motor in a first direction;
- a second machine comprising a second motor and a second sheave, which is rotatable by the second motor in a second direction, which is a reverse of the first direction;
- a flexible coupling by which respective ends of the first sheave and the second sheave are connected;
- and
- drive circuitry configured to synchronize reverse operations of the first motor and the second motor to raise or lower a load by identifying an asynchronous condition across the flexible coupling of the reverse operations of the first and second motors and correcting for the asynchronous condition.
Dependencies are inferred from the claim text.