Current-free synthesis of improved parameter-free zero-impedance

Details Current-free synthesis of improved parameter-free zero-impedance Current-free synthesis of improved parameter-free zero-impedance

1990-08-09

1991-07-23

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 97, 323285, 323286, 323351, 318811, 388811, H02M 3335, G05F 1575

Patent

active

050348728

ABSTRACT:
A method of synchesizing a system which effectively forces finite value of an impedance to zero comprising a most inner positive voltage feedback loop and an inner negative voltage feedback loop and an outer negative voltage feedback loop, whereby a voltage difference between the most inner positive feedback loop and the inner negative feedback loop is fed back to compensate for the voltage drop across the impedance of interest in both steady state and transient and whereby no current through the impedance is sensed and no parameters of the impedance including parameters of the plant under the control are required to be known implying minimization of measurement noise and adaptive/self-tuning operation, respectively, in applications in which the method is used to synthesize load independent switch mode power converters and electric motor drive systems, incorporating any kind of motor, of infinite disturbance rejection ratio and zero order dynamics.

REFERENCES:
patent: 4293812 (1981-10-01), Kubach et al.
patent: 4456872 (1984-06-01), Froeschle
patent: 4672518 (1987-06-01), Murdock
patent: 4686617 (1987-08-01), Colton
patent: 4837495 (1989-06-01), Zansky
patent: 4885674 (1989-12-01), Varga et al.

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