Uninterruptive switching regulator

• US 5,602,726 A
• Filed: 02/14/1996
• Issued: 02/11/1997
• Est. Priority Date: 09/22/1995
• Status: Expired due to Term

• Current Assignee: Nihon Protector Company Limited
• Original Assignee: Nihon Protector Company Limited
• Inventors: Sakai, Setuo
• Primary Examiner(s): Krishnan, Aditya
• Application Number:
  US08/601,403
• Time in Patent Office: 363 Days
• Field of Search: 320/21-24, 320/31-32, 320/39-40, 320/5-6, 320/15-17, 320/20, 363/18-19, 363/131-132, 363/21, 363/47, 363/48, 363/67, 363/56, 363/97, 363/2, 363/22, 363/23, 363/39, 363/40, 363/142-143, 363/79, 363/14, 363/55
• US Class Current: 363/55
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: H02J 9/067 using multi-primary transformers, e.g. transformer having one primary for each AC energy source and a secondary for the loads
• CPC Class Codes: H02M 1/4258 using a single converter stage both for correction of AC input power factor and generation of a regulated and galvanically isolated DC output voltage H02M1/4241 takes precedence
• CPC Class Codes: H02M 3/335 using semiconductor devices only
• CPC Class Codes: H02M 3/33569 having several active switching elements H02M3/3353 takes precedence
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

An uninterruptive switching regulator includes, at a primary side, a rectifier circuit, a primary winding of a high-frequency transformer, a primary side switching element, and a switching primary winding, and at a secondary side, a secondary side output circuit having a rectifying and smoothing circuit connected, and at a tertiary side, a tertiary winding, a charge and discharge circuit, a tertiary side switching element, an electrical double layer capacitor, and a switching tertiary winding, respectively. An output is transmitted from the primary side and tertiary side to the secondary side by the flyback system, and when the output voltage of the rectifier circuit at the primary side exceeds a predetermined level, the charge circuit operates, whereas when it does not exceed the predetermined level, the discharge circuit operates.

Claims

1. An uninterrupted switching regulator, comprising:

a rectifier circuit for rectifying an alternating current from an a.c. power supply;

a primary side circuit for developing a primary side high frequency pulse voltage through a primary side switching element in which a primary winding of a high-frequency transformer and the primary side switching element are connected in series to an output side of the rectifier circuit, and a switching primary winding for applying a switching control voltage to the primary side switching element is connected to the output side of the rectifier circuit;

a secondary side circuit for applying a d.c. output power to a load in which a rectifying and smoothing circuit is connected to a secondary winding of said high-frequency transformer;

a charge circuit connected in series to a first tertiary winding of the high-frequency transformer and including an electrical double layer capacitor or a secondary battery and a rectifying device; and

a discharge circuit in which a second tertiary winding connected in series to said first tertiary winding, a tertiary side switching element and said electrical double layer capacitor or secondary battery are connected in series to each other, and a switching tertiary winding for applying a switching control voltage to the tertiary side switching element is connected thereto, for developing a primary side high-frequency pulse discharge voltage from the discharge output of the electrical double layer capacitor or the secondary battery through said tertiary side switching element;

wherein an output is transmitted from the primary side and the tertiary side to the secondary side through, and said charge circuit operates when the output voltage of said rectifier circuit at the primary side exceeds a predetermined level, whereas said discharge circuit operates when it does not exceed the predetermined level.