NZ703329B - Power charger - Google Patents
Power chargerInfo
- Publication number
- NZ703329B NZ703329B NZ703329A NZ70332914A NZ703329B NZ 703329 B NZ703329 B NZ 703329B NZ 703329 A NZ703329 A NZ 703329A NZ 70332914 A NZ70332914 A NZ 70332914A NZ 703329 B NZ703329 B NZ 703329B
- Authority
- NZ
- New Zealand
- Prior art keywords
- power
- serial bus
- universal serial
- transformer
- plate
- Prior art date
Links
- 230000000717 retained Effects 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 description 10
- 230000001264 neutralization Effects 0.000 description 10
- 101700047129 DCPS Proteins 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 2
- 210000001233 CDP Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Abstract
The field of the invention relates to Universal Serial Bus power supply units for power plates. It is desirable to provide high currents at power plates for USB connectors. However space restrictions at the back of the power plate provide limitations on the size of power supplies which could be used to provide power. Embodiments of the invention provide a Universal Serial Bus power supply unit comprising a Universal Serial Bus connector electrically connected to a transformer via a cable. The Universal Serial Bus connector is configured to be inserted in a receptacle in a power plate and retained in the receptacle by an attachment mechanism to provide a USB power outlet from the face of the power plate. The transformer converts mains power to a power output for the Universal Serial Bus connector. The transformer has a housing. The transformer has an input adapted to be connected to mains wiring and an output for providing power to the Universal Serial Bus connector. The Universal Serial Bus connector is remote from the transformer. The cable electrically connects the transformer to the Universal Serial Bus connector to provide the output power from the transformer to the Universal Serial Bus connector. The unit is configured to be installed by inserting the Universal Serial Bus connector into a receptacle in a power plate and connecting the input of the transformer to mains wiring. ed to provide power. Embodiments of the invention provide a Universal Serial Bus power supply unit comprising a Universal Serial Bus connector electrically connected to a transformer via a cable. The Universal Serial Bus connector is configured to be inserted in a receptacle in a power plate and retained in the receptacle by an attachment mechanism to provide a USB power outlet from the face of the power plate. The transformer converts mains power to a power output for the Universal Serial Bus connector. The transformer has a housing. The transformer has an input adapted to be connected to mains wiring and an output for providing power to the Universal Serial Bus connector. The Universal Serial Bus connector is remote from the transformer. The cable electrically connects the transformer to the Universal Serial Bus connector to provide the output power from the transformer to the Universal Serial Bus connector. The unit is configured to be installed by inserting the Universal Serial Bus connector into a receptacle in a power plate and connecting the input of the transformer to mains wiring.
Description
POWER CHARGER
The present invention relates to a power charger and, in
particular, to a power charger for a mobile device.
Recently, mobile devices have increasingly used Universal
Serial Bus (USB) connections to connect to power supplies
for charging and powering purposes. USB is particularly
attractive for mobile devices since the connector includes
power contacts, to charge and power the device, and also
data contacts, to transfer data between the mobile device
and the unit to which it is connected, for example a
laptop computer.
There are two main types of USB ports for charging or
powering devices via USB. The first of these is a
Charging Downstream Port (CDP). CDP supports data
transfer as well as carrying power. In order not to
interfere with high speed data transfer, typically, CDPs
limit the current on the power contacts to around 900mA
during data transfer. The second type of USB charging
port is a Dedicated Charging Port (DCP). Dedicated
Charging Ports only provide power and do not carry data.
DCPs can provide larger current across the power contacts
due to the fact that no data is being transferred and so
interference is not a problem. DCPs can provide current
of up to 2000mA. Higher current allows the batteries of
the device to charge more quickly.
With mobile devices continually including more power
hungry applications, access to charging points and speed
of charging is becoming important. Long recharge periods
may be acceptable to consumers in certain situations, for
example where the device can recharge overnight, but if a
consumer needs to recharge a device during the day he will
require the recharge to take place quickly. Consequently,
higher current is becoming increasingly import and DCPs
are becoming more attractive for recharge purposes.
Summary of the Invention
In accordance with a first aspect of the present
invention, there is provided a Universal Serial Bus power
supply unit comprising a Universal Serial Bus connector
electrically connected to a transformer via a cable:
the Universal Serial Bus connector configured to be
inserted in a receptacle in a power plate and retained in
the receptacle by an attachment mechanism to provide a USB
power outlet from the face of the power plate;
the transformer for converting mains power to a power
output for the Universal Serial Bus connector, the
transformer having a housing, the transformer having an
input adapted to be connected to mains wiring and an
output for providing power to the Universal Serial Bus
connector, the Universal Serial Bus connector being remote
from the transformer; and
the cable electrically connecting the transformer to
the Universal Serial Bus connector to provide the output
power from the transformer to the Universal Serial Bus
connector;
wherein the unit is configured to be installed by
inserting the Universal Serial Bus connector into a
receptacle in a power plate and connecting the input of
the transformer to mains wiring.
Preferably, a Universal Serial Bus power supply unit as
described above wherein the transformer is adapted to be
positioned within a wall cavity.
Preferably a Universal Serial Bus power supply unit as
described above wherein the Universal Serial Bus connector
is configured to be inserted into a standard size
receptacle in a power plate.
Preferably a Universal Serial Bus power supply unit as
described above further comprising a terminating unit for
housing the transformer, the terminating unit configured
to contain heat generated by the transformer.
Preferably, a Universal Serial Bus power supply unit as
described above wherein the cable has length of around
cm.
Preferably, a Universal Serial Bus power supply unit as
described above wherein the Universal Serial Bus connector
includes at least one Universal Serial Bus receptacle
providing power at 2.1 A.
Preferably, a Universal Serial Bus power supply unit as
described above wherein the power plate is a general power
output (GPO) plate, switch plate, lighting plate or an
electrical accessory plate.
Preferably, a Universal Serial Bus power supply unit as
described above wherein the transformer input includes
wiring adapted to be connected to the mains wiring at the
power plate.
Preferably, a Universal Serial Bus power supply unit as
described above wherein the Universal Serial Bus connector
comprises an attachment mechanism for attaching the USB
connector to a power plate.
In accordance with a second aspect of the present
invention, there is provided a power system comprising:
a power plate comprising a receptacle;
a Universal Serial Bus Power Supply Unit according to
the first aspect wherein the Universal Serial Bus
connector is inserted in a receptacle of the power plate.
In accordance with a third aspect of the present invention
there is provided a method of installing a Universal
Serial Bus power supply in a power plate comprising;
providing a Universal Serial Bus power supply unit as
according to the first aspect;
inserting the Universal Serial Bus connector in a
receptacle in the power plate;
retaining the Universal Serial Bus connector in the
receptacle by an attachment mechanism; and
connecting input wiring of the transformer to mains
power supply.
Preferably, the method comprises connecting the input
wiring of the transformer to mains power supply at the
power plate.
Preferably, the attachment mechanism is a clipping
mechanism.
Preferably, the attachment mechanism is a clipping
mechanism.
Description of the Drawings
The present invention will now been described, by way of
example only, with reference to the accompanying drawings,
in which:
Figure 1 is a first embodiment of a twin USB charger
in accordance with an embodiment of the present invention;
Figure 2 is a face view of the connector showing the
twin USB receptacles;
Figure 3 shows the face of a double power socket
incorporating a twin USB receptacle in accordance with an
embodiment of the present invention;
Figure 4 shows the USB charger unit installed and
connected to a device for charging; and
Figure 5 shows the components of a USB power charger
in accordance with an embodiment of the present invention.
Figure 6 shows connections to a general power output
wall plate.
Figure 7 shows connections to a general power output
wall plate.
Description
Referring to the drawings, there is shown a terminating
unit 10 for connection to a mains power supply. The mains
power supply may be the power supply installed in a
residence or office and, typically, will be provided with
a live, neutral and earth connection within standard
rating cabling. The terminating block 10 houses a
transformer to convert the voltage and current of the
mains supply to that suitable for charging mobile device
via USB. Transformer 20 (shown in Figure 5) is housed
within the terminating block 10. The terminating block 10
includes a wiring connection block 30 to facilitate
connection from the mains wiring to the transformer.
The terminating unit has a power output 40 for providing
power to USB connector 60. The power leads contained
within cable 50 are connected to the output of the
transformer 20. Cable 50 is connected to a twin USB
connector 60. The twin USB connector includes two USB
receptacles 62 and 64 shown in Figure 2.
The terminating unit is preferably made from heat
resistant plastic in order to safely manage and contain
heat generated by the transformer.
The terminating unit is designed with a suitable form
factor to allow connection onto a surface or to be
contained within a wall cavity. For example, embodiments
may include receptacles for fastening means, for example
screws, to provide attachment of the terminating unit to a
surface.
In further embodiments, the terminating connections 30 may
be contained within the terminating unit in order that the
connections between the mains cabling and the transformer
are contained within the terminating unit. Such
embodiments are particularly advantageous because no
wiring is left exposed which increases the safety of the
unit.
The output from the transformer can be selected in
dependence on the power delivery requirements for various
devices. Preferably, in order to provide power for
devices through a USB the power output from the
transformer is provided in the form of a 5 volt output and
a current of 2000mA. In the embodiment of Figure 1, the
power output from the transformer is split to provide two
USB power connections via USB receptacles 62 and 64 within
connection unit 60.
The form factor of USB connector 60 is suitable to be
incorporated into a power socket plate. Figure 3 shows a
standard power socket plate 310 incorporating twin USB
receptacles.
In the embodiment of Figure 3, the plate is configured to
simultaneously receive two separate power plugs at power
connections 320, 310 along with two separate USB plugs USB
connector 360. On the reverse side of the plate, the USB
connector 360 does not interfere with the wiring into the
power connectors 320, 310 due to its small form factor.
Instead, simply USB connector 360 and USB cabling 50
protrudes from the rear side of the plate to the larger
terminating unit including the transformer. This
configuration enables the terminating unit and transformer
to be located sufficiently far from the plate so as not to
interfere with any of the cabling or connections to the
plate itself.
The embodiments of the invention facilitate easy and safe
installation since there is no exposed wiring at the
reverse side of the plate for the USB power charger and no
electrical connections are made to the power plate for the
USB connections, these are made within the USB connector
and completed before presenting the connector to the
plate. Instead the connector is simply fitted into the
plate. All electrical connections to the USB receptacles
are pre-connected and housed within the USB connector.
Additionally, the terminating unit contains any heat
generated from the transformer so as not to interfere with
any other components or wiring for the power plate.
Figure 4 shows a representative example of an embodiment
of the USB power charger installed into a wall cavity and
connected to a power plate. The transformer is correctly
configured to convert mains power specifications to USB
power specifications. In installation, the engineer can
pull the mains power lead 405 through wall cavity 420 and
connect the mains power cables to the terminating block
housing the transformer. Preferably, terminating unit 410
and transformer are pre-connected to the USB connector
440. Once the connection between the mains and the
transformer are made, the USB connector 440 is fixed into
the power plate 430. The terminating unit 410 is then fed
through the wall cavity 420 and fixed in position using
attachments. Power plate is fixed over the wall cavity as
usual.
As shown in Figure 4, devices can be connected to the USB
connectors on the power plate. It is clear from Figure 4
that the terminating unit is located remotely from USB
connector. Since the terminating unit is remote from the
USB connector it does not interfere structurally with any
power plate wiring. Instead, the USB connector connects
directly to the power plate.
In typical embodiments of the invention the cabling 50 has
sufficient length to enable the transformer to be placed
away from the power plate and attached to a surface.
Typical lengths for cables are around 30 cm.
Figure 6 shows a further embodiment of a USB connector
connected to a power plate. In Figure 6 the USB connector
is connected to double general power output (GPO) plate
600. The GPO includes a receptacle 610 for receiving USB
connector 620. In Figure 6b USB connector 620 is inserted
into the receptacle of power plate 600. In the embodiment
of figure 6b USB connector 620 includes a clipping
mechanism to retain USB connector in the receptacle.
Alternatively, other attachment mechanisms could be used
for attaching the USB connector to double GPO plate 600.
Figure 6c shows the power connections in and out of the
double GPO plate 600. Mains wiring 630 is terminated onto
terminals 602 604 602 on the rear side of double GPO plate
600. Power to USB transformer 640, housed within housing
640, is provided from double GPO plate 600. The Active
(live) wire 632 from mains wiring is connected to Active
terminal 602 on the rear side of double GPO plate 600.
The Neutral wire 634 from mains wiring is connected to
Neutral terminal 604 on the rear side of the double GPO
plate 600. The Earth wire 636 from the mains wiring is
connected to the Earth terminal 606 on the rear side of
double GPO plate 600.
USB transformer is housed within housing 640. USB
transformer includes active input provided by active wire
642 and a neutral input provided by neutral wire 644. The
active wire 642 and neutral wire 644 are contained within
cabling 660. In the embodiment of Figure 6, the active
wire 642 and neutral wire 644 are terminated to the
transformer within transformer housing 640.
To provide mains power input to the transformer active
wire 642 is connected to active terminal 602 on the double
GPO plate 600 and neutral wire 644 is connected to neutral
terminal 604 on the double GPO plate 600. Mains power at
230 V is routed from the double GPO plate terminals 602
604 to the transformer and converted to deliver 2.1 mA at
5V to each USB receptacle contained within USB connector
620.
As discussed above, by positioning transformer away from
double GPO plate 600, any heat dissipation in the
transformer is located away from the double GPO plate.
Additionally, by positioning the transformer away from the
double GPO plate there are fewer restrictions on the
physical size of the transformer. Larger transformers can
be utilised to deliver larger power outputs.
Cable tie 650 attached to transformer housing 640 is
attached to mains wiring 630 after electrical connections
to the terminals of the double GPO plate 600 have been
completed. Cable tie 650 is plastic but may also be
manufactured from any other suitable material.
Alternatively the cable tie may be in the form of a clip
or hook or any other form suitable for attaching the
transformer housing to mains wiring 630.
The cable of mains wiring 630 is thermoplastic sheathed
cable (TPS cable) which is typically thicker and stiffer
than USB cabling 660. By attaching transformer housing
640 to the mains wiring 630 the mains wiring supports the
weight of the transformer without providing undue strain
on the electrical connections to double GPO plate 600.
During installation mains wiring 630 is pulled through the
wall 670 to facilitate connection of the mains active
neutral and earth wires 632 634 636 and transformer power
wires 642 644 onto double GPO plate 600.
In alternative embodiments the transformer housing 640 is
attached to the inside of wall 670 or positioned elsewhere
within the wall cavity. Screws or other suitable
attachment means can be used to attach transformer housing
640 to the wall.
After power connections to and from terminals 602 604 606
of double GPO plate 600 are complete and USB connector 620
is inserted into double GPO plate 600, transformer
housing 640 is fed into the wall cavity and double GPO
plate 600 is surface mounted to wall 670 using screws or
other attachment means as shown in Figure 6e.
Transformer housing 640 is sized within the dimensions of
double GPO plate 600 to allow it to pass into the all
cavity. After installation transformer 640 hangs in the
wall cavity behind wall 670 supported by cable tie 650 and
mains wiring as shown in Figure 8. Transformer is
positioned away from double GPO plate 600 to prevent heat
dissipation from the transformer in the vicinity of the
double GPO plate.
In further embodiments the USB connector and USB
receptacles are integral with double GPO plate 600. In
such embodiments the connections to and from the USB
transformer is prewired to double GPO plate terminals 602
604 and the USB connector 620. Such embodiments remove
the requirement for the USB connector to be manually
inserted into the double GPO plate 600 during
installation. Additionally, there is no need to connect
the USB transformer wires 642 644 to the terminals 602 604
of the double GPO plate 600 during installation. Such
embodiments have similar cable lengths to the separate
system to provide heat dissipation within the transformer
away from the front plate.
Figure 7 shows an alternative embodiment of installation
of the USB transformer. In the embodiment of Figure 7
mains wiring 710 carrying power at mains specifications,
typically at 230 Volts is split at 715. One leg of the
split mains wiring is routed to USB transformer within
transformer housing 720. USB transformer converts the
power input from mains power to 2.1 A at 5 V for
connection to twin USB receptacles in connector 730.
Output 725 from USB transformer is routed to USB connector
730 on double GPO plate 740. Transformer housing 720 is
designed to contain heat dissipated from the transformer,
as discussed above. USB connector 730 is inserted into
double GPO plate 740.
The second leg 745 of the split mains wiring is routed
directly to double GPO plate 740. Second leg 745 provides
power at mains specifications to two three pin power
outputs of double GPO plate 740.
In the embodiments above, the power plates are double
General Power Output (GPO) plates. However, further
embodiments include any electrical accessory plate to
which mains wiring is terminated and into which USB
receptacles are provided. For example, in further
embodiments the power plate is a lighting plate
incorporating a switch for controlling lighting units. In
a further embodiment the power plate is a designated USB
plate including USB receptacles.
The mains wiring is wiring installed within a premises and
maintained within the walls, ceilings and floors of the
premises. Typically mains wiring is connected to the rear
side of surface mounted electrical devices including power
plates including GPO plates, lighting plates, switch
plates or other electrical devices. Mains wiring carries
power at mains power specifications, typically 220 – 240
Volts or 110 to 130 Volts depending on location.
It will be clear to those skilled in the art that the
configuration of embodiments of the present invention
provides versatility in terms of the performance and
rating of the transformer, the type of USB connectors, and
heat and power ratings of the materials. For example, if
power capabilities of USB sockets were to increase,
further embodiments of the invention could incorporate
different transformers or, indeed, different connection
receptacles. Additionally, embodiments of the invention
provide good control over the materials used in the
terminating unit in order to manage different levels of
heat or standard requirements of different safety
requirements. The cabling between the terminating unit
and the USB connector can also be selected as suitable for
the installation needs and safety rating requirements of
the building. Additionally, the flexibility of the
cabling can be selected in order to meet the requirements
of the installation.
It will be clear to those skilled in the art that
embodiments of the present invention are not limited to
use in USB charging systems. Different connectors for
different devices can be incorporated into the connection
unit.
Many power plates are now produced with a standard size
receptacle to receive power connectors or, indeed, to be
blocked off. Embodiments of the present invention may
include single USB receptacles, twin USB receptacles or
any other type of USB receptacle or other power connector.
A further advantage provided by embodiments of the present
invention is that the transformer is remote from the
connector. This moves the generation of heat from the
vicinity of the power plate and USB receptacle which
increases the safety of the power plate. By removing the
large transformer from the locality of the power plate,
embodiments of the invention also removes size
restrictions and wiring restrictions from the power plate.
This makes installation more straightforward at the plate
and also removes any physical interference between the
transformer itself and other wiring.
Modifications and variations as would be apparent to a
skilled addressee are deemed to be within the scope of the
present invention.
Claims (12)
1. A Universal Serial Bus power supply unit comprising a Universal Serial Bus connector electrically connected to 5 a transformer via a cable: the Universal Serial Bus connector configured to be inserted in a receptacle in a power plate and retained in the receptacle by an attachment mechanism to provide a USB power outlet from the face of the power plate; 10 the transformer for converting mains power to a power output for the Universal Serial Bus connector, the transformer having a housing, the transformer having an input adapted to be connected to mains wiring and an output for providing power to the Universal Serial Bus 15 connector, the Universal Serial Bus connector being remote from the transformer; and the cable electrically connecting the transformer to the Universal Serial Bus connector to provide the output power from the transformer to the Universal Serial Bus 20 connector; wherein the unit is configured to be installed by inserting the Universal Serial Bus connector into a receptacle in a power plate and connecting the input of the transformer to mains wiring.
2. A Universal Serial Bus power supply unit according to claim 1 wherein the transformer is adapted to be positioned within a wall cavity. 30
3. A Universal Serial Bus power supply unit according to any of claims 1 or 2 further comprising a terminating unit for housing the transformer, the terminating unit configured to contain heat generated by the transformer. 35
4. A Universal Serial Bus power supply unit according to any one of claims 1 to 3 wherein the cable has length of around 30 cm.
5. A Universal Serial Bus power supply unit according to any one of claims 1 to 4 wherein the Universal Serial Bus connector includes at least one Universal Serial Bus 5 receptacle providing power at 2.1 A.
6. A Universal Serial Bus power supply unit according to any one of claims 1 to 5 wherein the transformer input includes wiring adapted to be connected to the mains 10 wiring at the power plate.
7. A Universal Serial Bus power supply unit according to any preceding claim wherein the input of the transformer includes wiring adapted to be connected to the mains 15 wiring at the power plate.
8. A power system comprising: a power plate comprising a receptacle; a Universal Serial Bus Power Supply Unit according to 20 any one of the preceding claims wherein the Universal Serial Bus connector is inserted in a receptacle of the power plate.
9. A method of installing a Universal Serial Bus power 25 supply in a power plate comprising; providing a Universal Serial Bus power supply unit according to any of claims 1 to 7; inserting the Universal Serial Bus connector in a receptacle in the power plate; 30 retaining the Universal Serial Bus connector in the receptacle by an attachment mechanism; and connecting input wiring of the transformer to mains power supply. 35
10. A method according to claim 9 wherein the method comprises connecting the input wiring of the transformer to the mains power supply at the power plate.
11. A method according to claim 9 or 10 wherein the attachment mechanism is a clipping mechanism. 5
12. A Universal Serial Bus power supply unit according to any of claims 1 to 7 wherein the attachment mechanism is a clipping mechanism.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2013905049 | 2013-12-23 | ||
AU2013905049A AU2013905049A0 (en) | 2013-12-23 | Power charger | |
AU2014218469A AU2014218469A1 (en) | 2013-12-23 | 2014-08-29 | Power charger |
AU2014218469 | 2014-08-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ703329A NZ703329A (en) | 2017-01-27 |
NZ703329B true NZ703329B (en) | 2017-04-28 |
Family
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