System and method for controlling input line harmonics in a...

Details System and method for controlling input line harmonics in a... System and method for controlling input line harmonics in a...

2007-05-08

2010-06-01

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S799000, C318S801000

Reexamination Certificate

active

07728544

ABSTRACT:
A motor drive system is disclosed that includes a power input configured to receive alternating current (AC) power and a rectifier having a switching frequency selected to convert the AC power to direct current (DC) power. The motor drive unit also includes an input filter circuit connected between the power input and the rectifier and configured to suppress frequency harmonics across a range of harmonics. Additionally, the motor drive unit includes a block filter circuit connected between the power input and the rectifier and configured to substantially block frequency harmonics associated with the switching frequency of the rectifier. Furthermore, the motor drive unit includes an inverter configured to receive the DC power from the rectifier and convert the DC power to a series of pulses configured to drive a motor.

REFERENCES:
patent: 3944846 (1976-03-01), Thompson et al.

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