Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1978-05-17
1979-07-03
Shoop, William M.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 19, 363 21, 363 23, 363 26, 323 20, H02M 114, H02M 3335
Patent
active
041602889
ABSTRACT:
A regulated DC to DC power supply which minimizes input bus current changes caused by low frequency cyclical load variations is disclosed. The power supply includes a regulator connected to the input bus and controlled by a pulse width modulator. The regulator converts the DC voltage on the input bus to a higher, regulated DC voltage which is supplied to a variable load. A voltage feedback circuit is connected to the output of the boost converter and generates a control voltage which is supplied to the pulse width modulator to regulate the output voltage for variations in line voltage and load. The voltage feedback circuit includes an operational amplifier having a reference voltage supplied to a positive input terminal, and the output of the regulator supplied to a negative input terminal. A frequency response shaping network is connected between the output and the negative input terminal of the operational amplifier. An input bus current-sensing servo circuit is connected to sense current variations in the input bus and generate a control signal to the pulse width modulator to regulate the input current of the regulator. The input bus current-sensing servo circuit also includes an operational amplifier and an RC frequency response shaping network. The two frequency response shaping networks are designed such that, for a variable load which exhibits a given low frequency cyclical power change, the voltage feedback circuit generates a control signal for voltage variations below the given low frequency, but the input bus current-sensing servo circuit generates a control signal for changes having a predetermined frequency range including the given low frequency.
REFERENCES:
patent: 3611105 (1971-10-01), Sautel et al.
patent: 3636298 (1972-01-01), Risberg et al.
patent: 3670230 (1972-06-01), Rooney et al.
patent: 3675115 (1972-07-01), O'Loughlin
patent: 4087850 (1978-05-01), Koizumi
patent: 4126891 (1978-11-01), Suzuki et al.
Baker, Jr. William E.
Stuart Kenneth L.
Communications Satellite Corp.
Shoop William M.
Wong Peter S.
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