DC-DC converter with saturable reactor reset circuit
Patent 4811187 Issued on March 7, 1989. Estimated Expiration Date: 
October 20, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 20, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3217239 3348130 Regulated power supply system including saturable reactor means Motor speed control system Switching regulator Stabilizing power supply apparatus Patent #: 4460955 InventorsAssigneeApplicationNo. 07/111098 filed on 10/20/1987US Classes:363/25, With automatic control of the magnitude of output voltage or current363/75, Including inductive integral sensing and control means (e.g., ferroresonant circuit)363/82, With inductive control means in the line circuit363/91Saturable reactor (e.g., magnetic amplifier)ExaminersPrimary: Wong, Peter S.Attorney, Agent or FirmInternational ClassesG05F 1/38 (20060101)G05F 1/10 (20060101) H02M 3/24 (20060101) H02M 3/335 (20060101) Foreign Application Priority Data1985-02-12 JPAbstractA DC-DC converter having a transformer having a primary winding and a secondary winding; means for supplying DC input voltage to the primary winding; at least one switching element connected between the DC input voltage supplying means and the primary winding; rectifying means; at least one saturable reactor having a first winding and a second winding, the first winding being connected between one end of the secondary winding which is positive while the switching element is in a turn-on state and the rectifying means; and reset control circuit means connected to the second winding of the saturable reactor for supplying reset voltage thereto in response to output voltage of the rectifying means. The first and second windings have such polarities that the reset voltage can reset the saturable reactor during a turn-off period of the switching element. This DC-DC converter enjoys less temperature rise in the saturable reactor and a lower level of noise generation.Other References
Field of SearchDouble-ended (i.e., push-pull), self-oscillating typeUtilizing pulse-width modulation For resonant-type converter Having feedback isolation (e.g., optoisolator, transformer coupled, etc.) Having synchronous rectifier With automatic control of the magnitude of output voltage or current With automatic control of the magnitude of output voltage or current Having output current feedback For forward-type converter Having digital logic Having particular zero-switching control circuit (e.g., for quasi-resonant converter, etc.) Having output current feedback Having particular pulse-width modulation circuit Utilizing pulse-width modulation Having feedback winding inductively coupled to inverter inductive device (e.g., tertiary winding, etc.) With automatic control of the magnitude of output voltage or current Single-ended, self-oscillating type Single-ended, separately-driven type Having digital logic Having synchronous rectifier Having feedback winding inductively coupled to inverter inductive device (e.g., tertiary winding, etc.) Utilizing pulse-width modulation Having feedback isolation (e.g., optoisolator, transformer coupled, etc.) For flyback-type converter Bridge type With automatic control of the magnitude of output voltage or current Double-ended (i.e., push-pull), separately-driven type Including inductive integral sensing and control means (e.g., ferroresonant circuit) With inductive control means in the line circuit With inductive control means in the line circuit Saturable reactor (e.g., magnetic amplifier) In plural phase to D.C. system With plural control windings With transistor control means in the line circuit For bridge-type inverter In transistor inverter systems Double ended (i.e., push-pull) type Separately driven | |
