Patent EP1122873A2 successfully refreshed from Google Patents.
EP1122873A2
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EP
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Uninterruptible switching regulator
Assignee: Nihon Protector Co Ltd
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Filing: 2000-10-19
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Granted: —
•
Expires: 2020-10-19
Abstract
Abstract It is an object of the present invention to provide an uninterruptible switching regulator with which smaller size and lower cost can be achieved while the power supply efficiency is raised, which is accomplished by the effective utilization of an RCC type switching circuit. When the commercial AC input power supply 1 is operating normally, the AC-side RCC type switching circuit 21 is operated preferentially to supply power to the secondary drive circuit 25, but when there is a power outage with the commercial AC power supply 1, the DC-side RCC type switching circuit 69 is operated to supply power to the secondary drive circuit 25, and these two switching circuits can be switched at high speed.
Inventors
- 👤 Hiromi c/o Nihon Protector Co. Ltd. Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 17:58
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33561; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/061; H02M3/33569; H02J9/067; H02M3/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
332 words
An uninterruptible switching regulator, wherein an AC-side RCC type switching circuit equipped
with a switching element, which rectifies and converts into DC
an AC voltage from a commercial AC power supply serving as the
input source and then operates using the smoothed DC voltage
as its input, is connected to the primary winding of a high-frequency
transformer, there is provided an input voltage detection circuit that
detects when the input voltage from the commercial AC power
supply to the AC-side RCC type switching circuit drops below a
set voltage, a secondary drive circuit for driving a load such as a
computer board is connected to the secondary winding of the
high-frequency transformer, a DC-side RCC type switching circuit equipped with a
switching element, which is completely electrically insulated
from the AC-side RCC type switching circuit and the secondary
drive circuit and operates using a battery, an external DC
power supply, or the like as its input source, is connected to
the tertiary winding of the high-frequency transformer, there is provided high-speed switching means for
switching at high speed the operation of the AC-side RCC type
switching circuit and the DC-side RCC type switching circuit
on the basis of the detection information from the input
voltage detection circuit, when the input voltage detection circuit detects that the
input voltage from the commercial AC power supply is at or
above the set voltage, the operation of the DC-side RCC type
switching circuit is halted and power is supplied to the
secondary drive circuit by preferentially operating the AC-side
RCC type switching circuit with an output command from
the input voltage detection circuit, and when the input voltage detection circuit detects that the
input voltage from the commercial AC power supply has dropped
below the set voltage, power is supplied to the secondary
drive circuit by operating the DC-side RCC type switching
circuit and halting the operation of the AC-side RCC type
switching circuit with a reverse output command from the input
voltage detection circuit.
Claim 2
Dependent Claim
236 words
The uninterruptible switching regulator according to
Claim 1, wherein there is provided a comparative amplifying
element with an internal reference voltage for keeping the DC
output to the secondary drive circuit at a constant voltage, the photo-diode sides of two photo-couplers are connected
to the output terminal of this comparative amplifying element,
either serially or in parallel via a balance resistor, the photo-transistors of the two photo-couplers are
disposed one in the AC-side RCC type switching circuit and the
other in the DC-side RCC type switching circuit, the collector terminals of the two photo-transistors are
connected to the feedback input terminals of a PWM control IC
used to control the switching circuits, the emitter terminals of the two photo-transistors are
connected to the ground terminal of the PWM control IC, there are provided two transistors whose collector
terminals are connected to the collector terminals of the two
photo-transistors and whose emitter terminals are connected to
the emitter terminals thereof, the base terminals of the two transistors and the input
voltage detection circuit are connected such that the output
commands from the input voltage detection circuit can be
transmitted to the two base terminals in a mutually inverted
state, and an RCC partial resonance type control IC, or an IC having
substantially the same function as said IC, or a control
circuit having substantially the same function as said IC, is
used as the PWM control IC.
Claim 3
Dependent Claim
117 words
The uninterruptible switching regulator according to
Claim 1 or 2, wherein the high-speed switching means comprises a high-speed
insulated inverting amplifier consisting of a photo-coupler
or the like for optically linking the two switching
circuits by the photo-transistors provided to the DC-side RCC
type switching circuit and the photo-diodes provided to the
AC-side RCC type switching circuit, and a clamping Zener diode
provided between the collectors and emitters of the photo-transistors, transistors are connected by Darlington connection to the
emitter terminals of the photo-transistors, diodes are
serially connected in the forward direction to the collector
side of these transistors, and the cathode sides of these diodes are connected to the
feedback terminals of the PWM control IC.
Claim 4
Dependent Claim
204 words
The uninterruptible switching regulator according to
Claims 1, 2 or 3, wherein there are provided two supply circuits for
supplying voltage to the PWM control IC used in the DC-side
RCC type switching circuit, one of the supply circuits is equipped with a first
electronic switch that passes the DC voltage from the battery,
external DC power supply, or the like through a starting
circuit and closes only while charging current is flowing to a
starting capacitor, the other supply circuit is equipped with a second
electronic switch for supplying the DC-side PWM control IC
with auxiliary voltage made by rectifying the induced voltage
of the tertiary winding after the supply of DC voltage from
the first electronic switch has been received and the high-frequency
transformer is in an oscillating state, and there are provided: shutdown processing means for performing shutdown
processing by outputting a computer end command when the input
voltage detection circuit detects that the input voltage of
the commercial AC power supply has dropped below the set
voltage; and switch-off means for switching the second electronic
switch off and turning the DC-side switching element off by a
command from the photo-couplers upon completion of the
processing by the shutdown processing means.
Claim 5
Dependent Claim
91 words
The uninterruptible switching regulator according to
any of Claims 1 to 4, wherein a resonance capacitor is connected to either the
winding end portion of the primary winding or the winding end
portion of the tertiary winding, and the secondary drive circuit is provided with a
synchronous rectifying circuit in which two FET's are
connected in totem pole fashion to a DC/DC converter circuit
that makes a low-voltage large-current output and a polymer
semiconductor capacitor or a capacitor with substantially the
same low equivalent serial resistance as a polymer
semiconductor capacitor.
Claim 6
Dependent Claim
174 words
The uninterruptible switching regulator according to
any of Claims 1 to 5, wherein the high-frequency transformer comprises: an iron core; an inner secondary winding around the iron core, whose
number of turns is substantially half the total number of
turns of the secondary winding; a tertiary winding wound around the outside of this inner
secondary winding with an interlayer insulator interposed
therebetween; a primary winding that is a high-voltage winding wound
around the outside of this tertiary winding with an interlayer
insulator interposed therebetween; and an outer secondary winding around the outside of this
primary winding, whose number of turns is the remainder of
subtracting the number of turns of the inner secondary winding
from the total number of turns of the secondary winding, the inner secondary winding, the tertiary winding, and
the outer secondary winding are made from flat copper plates,
and the winding width of the inner secondary winding, the
tertiary winding, and the outer secondary winding is the same
as the winding width of the primary winding made of round wire.
References Cited (Backward Citations)
No citation records indexed.
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