Method and apparatus for active common-mode voltage compensation

Details Method and apparatus for active common-mode voltage compensation Method and apparatus for active common-mode voltage compensation

1998-02-13

1999-08-10

Nappi, Robert E.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 39, 323356, H02J 102, H02M 324, H01F 2742

Patent

active

059368560

ABSTRACT:
A method and apparatus for compensating for common mode voltages in the output of PWM inverters in induction motor systems is disclosed. In one embodiment, a common mode sensing circuit is coupled to the output of a three-phase inverter to detect common mode voltages in the output. A common mode sensing signal generated by the common mode sensing circuit is applied to a multi-level comparator circuit to generate a plurality of gate driving signals. The gate driving signals are used to control a single-phase multi-level half-bridge inverter circuit to generate a compensation signal that is injected by transformer coupling into the PWM inverter output.

REFERENCES:
patent: 4437050 (1984-03-01), Overzet
patent: 4680526 (1987-07-01), Okuyama et al.
patent: 4903185 (1990-02-01), Fiorina et al.
patent: 5309346 (1994-05-01), Gyugyi
patent: 5321598 (1994-06-01), Moran
patent: 5568371 (1996-10-01), Pitel et al.
patent: 5646498 (1997-07-01), Lipo et al.
patent: 5657213 (1997-08-01), Bjorklund et al.
patent: 5661390 (1997-08-01), Lipo et al.
patent: 5751138 (1998-05-01), Venkata et al.
D. Rendusara, New Inverter Output Filter Configuration Reduces Common Mode and Differential Mode dv/dt at the Motor Terminals in PWM Drive Systems, IEEE (1997).
Giovanna Oriti, A New Space Vector Modulation Strategy for Common Mode Voltage Reduction, IEEE (1997).
Shaotang Chen, Modeling of Motor Bearing Currents in PWM Inverter Drives, IEEE (1995).
Jay Erdman, Effect of PWM Inverters on AC Motor Bearing Current and Shaft Voltagesm IEEE (1995).
Satoshi Ogasawara, Modeling and Damping of High-Frequency Leakage Currents in PWM Inverter-Fed AC Motor Drive Systems, IEEE (1996).
A.L. Julian, Elimination of Common Mode Voltage in Three Phase Sinusoidal Power Converters, IEEE.
Jih-Sheng Lai, Multilevel Converters--A New Breed of Power Converters, IEEE IAS Annual Meeting, Orlando, FL (Oct. 1995).
Gautam Sinha, A Four Level Rectifier-Inverter System for Drive Applications, IEEE (Sep. 1996).

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