Method and apparatus for controlling power and optimizing power

Details Method and apparatus for controlling power and optimizing power Method and apparatus for controlling power and optimizing power

1979-06-18

1981-10-06

Shoop, William M.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 39, 318438, 318729, H02M 700

Patent

active

042939054

ABSTRACT:
A motor drive system for direct current motors and other similar loads in which the power factor presented to the line by the system remains close to unity for all operating conditions (e.g., all motor speeds). This is accomplished by rectifying an alternating current input voltage and thereafter chopping it to vary power input to the load. An important feature of the invention is the use of a choke at the output of the rectifier of sufficient size to insure that current pulses flowing from the rectifier will be continuous (i.e., will not drop to the zero voltage level) during the sequential ON periods of the rectifier elements.

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patent: 4150324 (1979-04-01), Naito
patent: 4193111 (1980-03-01), Wester
patent: 4222096 (1980-09-01), Capewell

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