Elevator power supply for inverter controller

• US 9,935,494 B2
• Filed: 05/15/2012
• Issued: 04/03/2018
• Est. Priority Date: 05/15/2012
• Status: Active Grant

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Rogers, Kyle W., Marvin, Daryl J., Bogli, Craig Drew, Watterson, Leslie C.
• Primary Examiner(s): SALATA, ANTHONY J
• Application Number:
  US14/401,319
• Publication Number:
  US 20150136531A1
• Time in Patent Office: 2,149 Days
• Field of Search: 187247, 187289, 187290, 187293, 187296, 187297, 187391, 187393, 307 64, 307 66, 307 68, 318376, 318799-815, 320128, 320130, 320131, 320132, 320133, 320135
• CPC Class Codes: B66B 1/30 effective on driving gear , e.g. acting on power electronics, on inverter or rectifier controlled motor
• CPC Class Codes: B66B 5/00 Applications of checking, fault-correcting, or safety devices in elevators
• CPC Class Codes: B66B 5/027 to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
• CPC Class Codes: H02J 9/06 with automatic change-over , e.g. UPS systems
• CPC Class Codes: H02J 9/062 for AC powered loads

Abstract

A power architecture includes a panel receiving power from a power grid through a breaker, a power supply coupled to the breaker to receive power from the grid, a battery coupled to the power supply through a switch, an elevator motor controller coupled to the power supply, the power supply providing power from at least one of the grid and the battery to the controller, and a charger coupled to the breaker and the battery and configured to receive power from the power grid and provide power to the battery to charge the battery.

Claims

1. A power architecture for an elevator controller, the power architecture comprising:

a panel receiving power from a power grid at a breaker;

a power supply coupled to the breaker to receive power from the grid;

a battery coupled to the power supply through a switch;

an inverter to generate currents for a motor of an elevator;

an inverter controller coupled to the power supply and to the inverter, the inverter controller configured to provide inverter control;

the power supply providing power from one of the grid and the battery to the inverter controller; and

a charger coupled to the breaker and the battery and configured to receive power from the power grid and provide power to the battery to charge the battery;

wherein the switch is configured to open when the breaker opens due to an overcurrent condition;

wherein the switch is configured to close when the power from the power grid is unavailable;

wherein the switch is configured to be open during normal operation when the power from the power grid is available.

2. The power architecture of claim 1, wherein the battery is configured to be charged by the power grid when the power from the power grid is available.

3. The power architecture of claim 1, further comprising:

a diode coupled to the battery and the charger and configured to ensure that the charging of the battery occurs through the charger and not the power supply and to provide power from the battery to the power supply when the power from the power grid is unavailable.

4. An apparatus comprising:

an inverter to generate currents for a motor of an elevator;

an inverter controller configured to be powered by a grid when power provided by the grid is available, the inverter controller configured to provide inverter control;

a battery coupled to the grid and configured to be charged by power received from the grid when the power from the grid is available and to supply power to the inverter controller when the power from the grid is unavailable;

a switch configured to selectively isolate power stored in the battery from the inverter controller based on a position of the switch that is selected from a breaker included in a panel;

wherein the switch opens when the breaker opens due to an overcurrent condition and the switch closes when the power provided by the grid is unavailable;

wherein the switch is open during normal operation when the power from the grid is available.

5. The apparatus of claim 4, further comprising:

an isolation mechanism configured to isolate the battery from the grid when the power from the grid is unavailable.

6. The apparatus of claim 4, wherein the isolation mechanism comprises a diode.

7. The apparatus of claim 4, further comprising:

a charger coupled to the grid and the battery and configured to receive power from the grid and provide power to the battery to continuously charge the battery when the power from the grid is available.