Stop sequencing for braking device
First Claim
1. An elevator system comprising:
- a car;
a first brake having a first magnetic brake coil, the first brake movable between a disengaged and an engaged position; and
a brake control device having a brake power source, the brake control device electrically connected to the first brake and configured to selectively delay the movement of the first brake to the engaged position with a first residual current from the first magnetic brake coil;
wherein the delay of the movement of the first brake to the engaged position is controlled by recirculating the first residual current through the first magnetic brake coil.
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0 Petitions
Accused Products
Abstract
An elevator system including a braking system, and a method of retrofitting an elevator for such braking system is disclosed. The braking system may comprise a first brake having a first magnetic brake coil, the first brake movable between a disengaged and an engaged position, a second brake having a second magnetic brake coil, the second brake movable between a disengaged and an engaged position, and a brake control device having a brake power source. The brake control device may be electrically connected to the first and second brakes and may be configured to selectively delay or sequence the movement of the first brake and the second brake to the engaged position with residual current from the brake coils.
28 Citations
23 Claims
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1. An elevator system comprising:
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a car; a first brake having a first magnetic brake coil, the first brake movable between a disengaged and an engaged position; and a brake control device having a brake power source, the brake control device electrically connected to the first brake and configured to selectively delay the movement of the first brake to the engaged position with a first residual current from the first magnetic brake coil; wherein the delay of the movement of the first brake to the engaged position is controlled by recirculating the first residual current through the first magnetic brake coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A brake system comprising:
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a first brake having a first magnetic brake coil, the first brake movable between a disengaged and an engaged position; and a brake control device for selectively delaying the movement of the first brake to the engaged position with residual current from the first magnetic brake coil, the brake control device electrically connected to the first brake; wherein the delay of the movement of the first brake to the engaged position is controlled by recirculating the residual current through the first magnetic brake coil. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of retrofitting an elevator system having a car, a first brake having a first magnetic brake coil and a brake control device the method comprising:
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modifying the brake control device to selectively delay the activation of the first brake by controlling the rate of decay of stored energy within the first magnetic brake coil; wherein the rate of decay of stored energy within the first magnetic brake coil is controlled by recirculating a first magnetic brake coil residual current through the first magnetic brake coil. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification