Apparatus and method to generate braking torque in an AC drive

(12) United States Patent

Hammond et al.

US006417644B2

(io) Patent No.: US 6,417,644 B2 (45) Date of Patent: Jul. 9,2002

(54) APPARATUS AND METHOD TO GENERATE BRAKING TORQUE IN AN AC DRIVE

(75) Inventors: Peter W. Hammond, Hempfield

Township, County of Westmoremand;
Mukul Rastogi, Monroeville, both of
PA (US)

(73) Assignee: Robicon Corporation, New

Kensington, PA (US)

( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.

(21) Appl. No.: 09/844,795

(22) Filed: Apr. 27, 2001

Related U.S. Application Data

(63) Continuation of application No. 09/386,677, filed on Aug.

31, 1999, now Pat. No. 6,262,555. (60) Provisional application No. 60/102,977, filed on Oct. 2,

1998.

(51) Int. CI. II02P 3/18

(52) U.S. CI 318/759; 318/375; 318/807

(58) Field of Search 318/375, 376,

318/377, 378, 798-803, 807, 808, 810, 811, 757, 759, 760, 762

FOREIGN PATENT DOCUMENTS

(List continued on next page.)

15 Claims, 11 Drawing Sheets

William McMurray, "Resonant Snubbers with Auxiliary Switches", IEEE/IAS Ann. Meet. Conf. Rec, 1989, pp. 397-402, 1989.

Mario Marchesoni, High Performance Current Control Techniques for Applications to multilevel High-Power Voltage Source Inverters, IEEE Transactions on Power Electronics, vol. 7, No. 1, Jan. 1992.

Cerovsky Zdenek, Bernat Frantisek and Vecerka Tomas,
"Electrodynamical Phenomenon in a System Voltage Inver-
ter-Induction Machine by the Loss of D.C. Supply Voltage",
ACTA Technica CSAV, Oct., 1979, pp. 431-447.
Jun Oyama, Xiarong Xia, Tsuyoshi Higuchi and Biji
Yamada, Displacement Angle Control of Matrix Converter,
IEEE, 1997.

ABB Industrie AG Product Brochure titled "The ACS 1000 is performance simplified", 1997.

Juergen K. Steinke, Christian A. Stulz and Pasi A. Pohjalainen, "Use of a LC Filter to Achieve a Motorfriendly Performance of the PWM Voltage Source Inventor", IEEE, 1997.

ABB Industrie AG Product Brochure titled "ACS 1000
Drive Description", 1997.

Bang Sup Lee, Prasad N. Enjeti and Ira J. Pitel, "A New
24—Pulse Diode Rectifier System for AC Motor Drives
Provides Clean Power Utility Interface with Low kVA
Components", IEEE, 1996, pp. 1024-1031.
Bin Wu and Frank A. Dewinter, "Voltage Stress on Induction
Motors in Medium-Voltage PWM GTO CSI Drives", IEEE
Transactions onPower Electronics, vol. 12, No. 2, Mar.
1997.

Jose Rodriguez, Luis Moran, Antonio Gonzalez and Daniel
Rodriguez, "Modeling, Analysis and Stimulation of Multi-
level Converters with Regenerative Cells", pp. 1-19, No
Date.

Jose Rodriguez, Luis Moran, Antonio Gonzalez and Cesar Silva, "High Voltage Multilevel Converter with Regeneration Capability", pp. 1-6, No Date.

Fang Zheng Peng and Jih-Sheng Lai, "Dynamic Performance and Control of a Static Var Generator Using Cascade Multilevel Inverters", IEEE Transactions on Industry Applications, vol. 33 No. 3, May/Jun. 1997, pp. 748-755.

* cited by examiner