US 2024/0051787 A1Published application

Conveyance system with regenerative drive

AssigneeOtis Elevator Company

InventorStephan Glessner

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Abstract

A conveyance system includes an alternating current (AC) power source (28), a machine (30) for moving a conveyance apparatus, and a regenerative drive (20). The machine is connected to the AC power source by the regenerative drive. The regenerative drive includes a direct current (DC) bus (26), a converter (22) and a machine control circuit (24). The conveyance system further includes an energy harvesting device (32) and a switching arrangement (34). The switching arrangement (34) is arranged between the energy harvesting device (32) and the machine control circuit (24), and is switchable between a first condition, in which the energy harvesting device (32) is disconnected from the machine control circuit (24), and a second condition in which the energy harvesting device (32) is operatively connected to at least one switching device of the second plurality of switching devices (23) of the machine control circuit (24).

Claims15

Dependent claims

A conveyance system (1, 1′), comprising:

an alternating current (AC) power source (28, 28′, 28″, 28′″, 280);
a machine (30, 30′, 30″, 30′″, 300) for moving a conveyance apparatus (2, 2′);
a regenerative drive (20, 20′, 20″, 20′″, 200), wherein the machine (30, 30′,
30″, 30′″, 300) is connected to the AC power source (28, 28′, 28″, 28′″, 280) by the regenerative drive (20, 20′, 20″, 20′″, 200), the regenerative drive (20, 20′, 20″, 20′″, 280) comprising:
a direct current (DC) bus (26, 26′, 26″, 26′″, 260);
a converter (22, 22′, 22″, 22′″, 220), comprising a first plurality of switching devices (21, 21′, 21″, 21′″, 210) in selective communication with each phase of the AC power source (28, 28′, 28″, 28′″, 280) and with the DC bus (26, 26′, 26″, 26′″, 260);
and
a machine control circuit (24, 24′, 24″, 24′″, 240), comprising a second plurality of switching devices (23, 23′, 23″, 23′″, 230) in selective communication with each phase of the machine (30, 30′, 30″, 30′″, 300) and with the DC bus (26, 26′, 26″, 26′″, 260);
the conveyance system further comprising:
an energy harvesting device (32, 32′, 32″, 32′″, 320);
and
a switching arrangement (34, 340′, 34a″, 34b″, 34c″, 340″, 340), arranged between the energy harvesting device (32, 32′, 32″, 32′″, 320) and the machine control circuit (24, 24′, 24″, 24′″, 240), wherein the switching arrangement (34, 340, 34a″, 34b″, 34c″, 340″, 340) is switchable between a first condition, in which the energy harvesting device (32, 32′, 32″, 32′″, 320) is disconnected from the machine control circuit (24, 24′, 24″, 24′″, 240), and a second condition in which the energy harvesting device (32, 32′, 32″, 32′″, 320) is operatively connected to at least one switching device of the second plurality of switching devices (23, 23′, 23″, 23′″, 230) of the machine control circuit (24, 24′, 24″, 24′″, 240).

9 more elements

A method of operating a regenerative drive (20, 20′, 20″, 20′″, 200) of a conveyance system (1, 1′), the regenerative drive (20, 20′, 20″, 20′″, 200) comprising a direct current (DC) bus (26, 26′, 26″, 26′″, 260), a converter (22, 22′, 22″, 22′″, 220) comprising a first plurality of switching devices (21, 21′, 21″, 21′″, 210) in selective communication with each phase of an AC power source (28, 28′, 28″, 28′″, 280) and with the DC bus (26, 26′, 26″, 26″, 260), and a machine control circuit (24, 24′, 24″, 24′″, 240) comprising a second plurality of switching devices (23, 23′, 23″, 23′″, 230) in selective communication with each phase of a machine (30, 30′, 30″, 30′″, 300) and with the DC bus (26, 26′, 26″, 26′″, 260), the method comprising:

driving movement of the machine (30, 30′, 30″, 30′″, 300) with power from the AC power source (28, 28′, 28″) using the regenerative drive (20, 20′, 20″, 20′″, 200), wherein the machine (30, 30′, 30″, 30′″, 300) is arranged to move a conveyance apparatus (2, 2′) of the conveyance system (1, 1′);
when motion of the machine (30, 30′, 30″, 30′″, 300) is being braked, harvesting power from the machine (30, 30′, 30″, 30′″, 300) using the regenerative drive (20, 20′, 20″, 20′″, 200);
switching a switching arrangement (34, 340, 34a″, 34b″, 34c″, 340″, 340) from a first condition, in which an energy harvesting device (32, 32′, 32″, 32′″, 300) is disconnected from the machine control circuit (24, 24′, 24″, 24′″, 240) of the regenerative drive (20, 20′, 20″, 20′″, 200), to a second condition in which the energy harvesting device (32, 32′, 32″, 32′″, 320) is operatively connected to at least one switching device of the second plurality of switching devices (23, 23′, 23″, 23′″, 230) of the machine control circuit (24, 24′, 24″, 24′″, 240).

Dependencies are inferred from the claim text.

Facts

Application: 17/984,811Filed 10 Nov 2022
Priority: EP 22190435.215 Aug 2022
Published: 15 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B66B 1/302
Effective on driving gear , e.g. acting on power electronics, on inverter or rectifier controlled motor: for energy saving
B65G 23/23
Arrangements or mountings of driving motors: of electric linear motors
B66B 1/306
Effective on driving gear , e.g. acting on power electronics, on inverter or rectifier controlled motor: with DC powered elevator drive
B66B 1/308
Effective on driving gear , e.g. acting on power electronics, on inverter or rectifier controlled motor: with AC powered elevator drive