Bus capacitor bank configuration for a multi-level regenerative drive

Patent metadata

Field	Value
Publication number	US-10008917-B2
Application number	US-201315104195-A
Country	US
Kind code	B2
Filing date	Dec 18, 2013
Priority date	Dec 18, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A regenerative drive device and a method for configuring the DC link of a regenerative drive device are disclosed. The multilevel regenerative drive device may include an inverter having a plurality of power components and a converter having a plurality of power components. The multilevel regenerative drive device may also include a direct current (DC) link bridging the inverter and the converter, the DC link including a capacitor, an inverter neutral point, and a converter neutral point independent of the inverter neutral point. Alternatively, the inverter neutral point and the converter neutral point may be connected.

First claim

What is claimed is:

1. A multilevel regenerative drive device, comprising:
an inverter having a plurality of power components;
a converter having a plurality of power components;
a direct current link bridging the inverter and the converter, the DC link comprising:
a capacitor;
an inverter neutral point; and
a converter neutral point independent of the inverter neutral point;

wherein one of the inverter and the converter operates in a bipolar pulse-width modulation mode and an other of the inverter and the converter operates in a unipolar pulse-width modulation mode.

2. The multilevel regenerative drive device of claim 1 , wherein at least one member of the plurality of power components of the inverter and at least one member of the plurality of power components of the converter is an insular-gate bipolar transistor.

3. The multilevel regenerative drive device of claim 1 , wherein the plurality of power components of the inverter and the plurality of power components of the converter are arranged having a T-type topology.

4. The multilevel regenerative drive device of claim 1 , wherein the plurality of power components of the inverter and the plurality of power components of the converter are arranged having a neutral-point-clamped topology.

5. The multilevel regenerative drive device of claim 1 , wherein the multilevel regenerative drive device is a multilevel regenerative elevator drive device.

6. A multilevel regenerative drive device, comprising:
an inverter having a plurality of power components;
a converter having a plurality of power components;
a direct current link bridging the inverter and the converter, the DC link comprising:
a capacitor;
an inverter neutral point; and
a converter neutral point independent of the inverter neutral point;

wherein the plurality of power components of the inverter and the plurality of power components of the converter are arranged having an advanced T-type neutral point clamped topology.

7. The multilevel regenerative drive device of claim 6 , wherein at least one member of the plurality of power components ( 65 , 68 ) of the inverter and at least one member of the plurality of power components ( 65 , 68 ) of the converter is a reverse-blocking insular-gate bipolar transistor.

8. A multilevel regenerative drive device, comprising:
an inverter having a plurality of power components;
a converter having a plurality of power components;
a direct current link bridging the inverter and the converter, the DC link comprising:
a capacitor;
a neutral point, the neutral point shared by the inverter and the converter;

wherein one of the inverter and the converter operates in a bipolar pulse-width modulation mode and an other of the inverter and the converter operates in a unipolar pulse-width modulation mode.

9. The multilevel regenerative drive device of claim 8 , wherein at least one member of the plurality of power components of the inverter and at least one member of the plurality of power components of the converter is an insular-gate bipolar transistor.

10. The multilevel regenerative drive device of claim 8 , wherein the plurality of power components of the inverter and the plurality of power components of the converter are arranged having a T-type topology.

11. The multilevel regenerative drive device of claim 8 , wherein the plurality of power components of the inverter and the plurality of power components of the converter are arranged having a neutral-point-clamped topology.

12. The multilevel regenerative drive device of claim 8 , wherein the multilevel regenerative drive device is a multilevel regenerative elevator drive device.

13. A multilevel regenerative drive device, comprising:
an inverter having a plurality of power components;
a converter having a plurality of power components;
a direct current link bridging the inverter and the converter, the DC link comprising:
a capacitor;
a neutral point, the neutral point shared by the inverter and the converter;

wherein the plurality of power components ( 65 , 68 ) of the inverter and the plurality of power components ( 65 , 68 ) of the converter are arranged having an advanced T-type neutral point clamped topology.

14. The multilevel regenerative drive device of claim 13 , wherein at least one member of the plurality of power components of the inverter and at least one member of the plurality of power components of the converter is a reverse-blocking insular-gate bipolar transistor.

15. A method for configuring a DC link for a multilevel regenerative drive device, the multilevel regenerative elevator drive device having an inverter having a plurality of power components and a converter having a plurality of power components, the method comprising:
determining a neutral point associated with the inverter; and
determining a neutral point associated with the converter, the neutral point of the converter being independent of the neutral point associated with the inverter;
wherein one of the inverter and the converter operates in a bipolar pulse-width modulation mode and an other of the inverter and the converter operates in a unipolar pulse-width modulation mode.

16. A method for configuring a DC link for a multilevel regenerative drive device, the multilevel regenerative elevator drive device having an inverter having a plurality of power components and a converter having a plurality of power components, the method comprising:
determining a neutral point associated with the inverter;
determining a neutral point associated with the converter, the neutral point of the converter being independent of the neutral point associated with the inverter; and

connecting the neutral point associated with the inverter to the neutral point associated with the converter.

Assignees

• Otis Elevator Co

Inventors

• Agirman Ismail
• Millett Steven M
• Krishnamurthy Shashank
• Wang Yang

Classifications

• H02M7/487

  Neutral point clamped inverters · CPC title

• H02P3/14

  by regenerative braking · CPC title

• H02P3/18

  for stopping or slowing an AC motor · CPC title

• H03H7/004

  Capacitive coupling circuits not otherwise provided for · CPC title

• B66B1/302 Primary

  for energy saving · CPC title