Circuit for balancing steady-state currents of switching devices

Details Circuit for balancing steady-state currents of switching devices Circuit for balancing steady-state currents of switching devices

1998-05-11

1999-03-30

Nguyen, Matthew

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 71, H02H 7122

Patent

active

058896635

ABSTRACT:
A balancing circuit balances the steady-state currents of the switching devices in an electric power converter, which facilitates reducing the size of the power converter and precisely balancing the steady-state currents. The balancing circuit holds transient sensing voltages at the time of turning-on of the switching devices, and detects the unbalance between the currents of the switching devices based on the distribution or unbalance of the sensing voltages by comparing the steady-state sensing voltages or the values corresponding to the steady-state sensing voltages with the stored transient sensing voltages. The steady-state currents of the switching devices are balanced by regulating the drive voltages of the switching devices based on the detected distribution of the steady-state currents.

REFERENCES:
patent: 3633070 (1972-01-01), Vassos
patent: 4104687 (1978-08-01), Zulaski
patent: 4352210 (1982-09-01), Puckette
patent: 5172310 (1992-12-01), Deam et al.

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