Elevator regenerative drive control referenced to DC bus

Patent metadata

Field	Value
Publication number	US-9296589-B2
Application number	US-201013809454-A
Country	US
Kind code	B2
Filing date	Jul 30, 2010
Priority date	Jul 30, 2010
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

An exemplary elevator drive includes a DC bus. At least some power components in a power section are electrically referenced to the DC bus. At least some control components in a control section including a drive controller and associated inputs are electrically referenced to the DC bus. This eliminates any requirement for isolating the components referenced to the DC bus from each other.

First claim

I claim:

1. A regenerative elevator drive device, comprising:
a DC bus;
a power section having a plurality of power components electrically referenced to the DC bus; and
a control section having a plurality of control components including a drive controller and controller inputs electrically referenced to the DC bus,
wherein at least one of the controller inputs is coupled to a current sensing resistor in the power section so that the controller can determine a current of a corresponding component of the power section.

2. The device of claim 1 , wherein the power components electrically referenced to the DC bus comprise a converter and an inverter and the control components electrically referenced to the DC bus comprise converter drivers and inverter drivers that are controlled by the drive controller, the converter drivers and inverter drivers providing control signals to the converter and the inverter, respectively.

3. The device of claim 2 , wherein the converter and the inverter each comprise a plurality of control switches referenced to the DC bus.

4. The device of claim 2 , wherein the control components that are referenced to the DC bus comprise converter gate drivers and inverter gate drivers.

5. The device of claim 1 , wherein the controller inputs comprise a plurality of analog inputs and a plurality of discrete inputs.

6. The device of claim 1 , wherein at least some of the controller inputs are from one of the components of the power section that is referenced to the DC bus.

7. The device of claim 1 , wherein at least one of the controller inputs is coupled to a voltage sensing resistor associated with the DC bus so that the controller can determine a voltage of the DC bus.

8. The device of claim 1 , wherein other components of the control section are electrically referenced to ground and comprising optical isolators between some of the control section components that are referenced to ground and some of the components of the control section that are referenced to the DC bus.

9. The device of claim 1 , comprising a plurality of shunt resistors associated with selected ones of the components of the power section, the shunt resistors providing current information to at least one of the components of the control section.

Assignees

• Marvin Daryl J
• Otis Elevator Co

Inventors

• Marvin Daryl J

Classifications

• B66B1/302 Primary

  for energy saving · CPC title

• B66B1/06 Primary

  electric · CPC title

• H02M5/4585

  having a rectifier with controlled elements · CPC title