U.S. patent application number 15/973235 was filed with the patent office on 2018-09-06 for hybrid dimming controller with multi-class outputs.
This patent application is currently assigned to The Watt Stopper, Inc.. The applicant listed for this patent is The Watt Stopper, Inc.. Invention is credited to Erick E. Betancourt-Ochoa, Jonathan P. Cartrette.
Application Number | 20180255624 15/973235 |
Document ID | / |
Family ID | 59315296 |
Filed Date | 2018-09-06 |
United States Patent
Application |
20180255624 |
Kind Code |
A1 |
Cartrette; Jonathan P. ; et
al. |
September 6, 2018 |
Hybrid Dimming Controller With Multi-Class Outputs
Abstract
A hybrid dimming controller for a lighting control system
providing isolated class 1 and class 2 dimming outputs. The
controller has two NEC class 1 outputs for providing independent
low-voltage dimming-control signals for two lighting loads and two
NEC class 2 outputs for providing the same two independent dimming
control-signals for the lighting loads. Thus, the controller has
both a class 1 and a class 2 outputs for delivering the same
dimming-control signal for each of the two lighting loads while
maintaining within the controller the isolation that is required
between class 1 and class 2 circuits.
Inventors: |
Cartrette; Jonathan P.;
(Carlsbad, CA) ; Betancourt-Ochoa; Erick E.;
(Carlsbad, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
The Watt Stopper, Inc. |
Carlsbad |
CA |
US |
|
|
Assignee: |
The Watt Stopper, Inc.
Carlsbad
CA
|
Family ID: |
59315296 |
Appl. No.: |
15/973235 |
Filed: |
May 7, 2018 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
15401901 |
Jan 9, 2017 |
9967954 |
|
|
15973235 |
|
|
|
|
62279574 |
Jan 15, 2016 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H05B 45/37 20200101;
H05B 45/10 20200101; H05B 47/185 20200101; H01R 13/512 20130101;
H01R 13/53 20130101 |
International
Class: |
H05B 37/02 20060101
H05B037/02; H01R 13/512 20060101 H01R013/512; H01R 13/53 20060101
H01R013/53 |
Claims
1. A dimming controller for a lighting load comprising: a class 1
power conditioner operable to provide a class 1 dimmer signal to
one or more class 1 outputs; a class 2 power conditioner isolated
from the class 1 power conditioner, the class 2 power conditioner
operable to provide a class 2 dimmer signal to one or more class 2
outputs.
2. The dimming controller of claim 1 where at least one of the one
or more class 2 outputs comprises: a low voltage connector operably
connected to the class 2 power conditioner to provide the class 2
dimmer signal.
3. The dimming controller of claim 1 where at least one of the one
or more class 2 outputs comprises: one or more output wires
operable to provide the class 2 dimmer signal.
4. The dimming controller of claim 1 further comprising: an
isolated 24v power conditioner.
5. The dimming controller of claim 1 further comprising: a class 1
relay for controlling power to the lighting load.
6. The dimming controller of claim 1 further comprising: one or
more network connectors for connecting lighting sensors and
controls to the dimming controller.
7. The dimming controller of claim 3 further comprising: a class 1
relay operably connected to the class 1 power conditioner; and a
switch for manually controlling the class 1 relay.
Description
RELATED APPLICATIONS
[0001] This application is a continuation of U.S. application Ser.
No. 15/401,901 filed Jan. 9, 2017, now U.S. Pat. No. 9,967,954,
which claims priority from U.S. Provisional Application 62/279,574
filed Jan. 15, 2016.
FIELD OF THE INVENTIONS
[0002] The inventions described below relate to the field of
dimming controllers for lighting.
BACKGROUND OF THE INVENTIONS
[0003] Historically, 0-10V dimming signals for controlling light
intensity have been transmitted over wires in cables that are part
of and rated for a National Electrical Code (NEC) class 2 circuit.
A class 2 circuit has sufficiently low voltage and current
limitations such that the cables in the circuit do not have to be
housed in raceway and conduit when they traverse the surface of a
building. An NEC class 1 circuit can carry higher voltages and
current, but the cables in such a circuit must be housed in raceway
or conduit when they traverse the surface of a building. While
different cables for different class 1 circuits can be routed
together through common raceway and conduit, class 1 and class 2
circuits must be isolated from each other.
[0004] Recently, electrical cable manufacturers have started
offering cables for use in NEC class 1 circuits that include power
wires for transmitting line power 110-120V AC as well as
low-voltage wires for transmitting a 0-10V dimming signal. The
overall cable is rated for use in class 1 circuits.
[0005] Controllers for lighting control systems such as The Watt
Stopper Inc.'s Digital Lighting Management system typically include
inputs for line power and one or more sensors, such as occupancy
and vacancy sensors. The line power is connected to one or more
outputs for lighting loads within the controller through internal
relays so that the lighting loads can be turned on or off based
upon the status of the sensors. The controllers also typically
include an output for a 0-10V dimming signal. The output is
typically only suitable for a connection to a cable that is part of
a class 2 circuit.
SUMMARY
[0006] The devices and methods described below provide for a hybrid
dimming controller for a lighting control system providing isolated
class 1 and class 2 dimming outputs. The controller has two NEC
class 1 outputs for providing independent low-voltage
dimming-control signals for two lighting loads and two NEC class 2
outputs for providing the same two independent dimming
control-signals for the lighting loads. Thus, the controller has
both a class 1 and a class 2 output for delivering the same
dimming-control signal for each of the two lighting loads while
maintaining within the controller the isolation that is required
between class 1 and class 2 circuits. This provides an installer
with greater flexibility when performing an installation of a
lighting control system. The installer can choose to route the
cable or wires transmitting the dimming signal through conduit or
raceway for the class 1 circuits or could instead choose to route
the cable or wires transmitting the dimming signal outside of such
conduit or raceway.
[0007] The low-voltage dimming control signal may be a 0-10V
signal. A subset of the class 2 outputs may be in the form of a
class 2 connector. Each of the class 1 outputs may be in the form
of two low-voltage wires, each of which has sufficient insulation
for a class 1 circuit.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a front perspective view of a controller for a
lighting control system.
[0009] FIG. 2 is a rear perspective view of the controller of FIG.
1.
[0010] FIG. 3 is a rear exploded perspective view of the controller
of FIG. 1.
[0011] FIG. 4 is a schematic diagram of a first portion of
circuitry in the controller of FIG. 1.
[0012] FIG. 5 is a schematic diagram of a second portion of
circuitry in the controller of FIG. 1.
DETAILED DESCRIPTION OF THE INVENTIONS
[0013] FIG. 1 shows a perspective view of a controller 100 for a
lighting control system according to the present disclosure. The
controller 100 can communicate directly or through a network with
one or more sensors (not shown) and can turn-on, turn-off, or
change the intensity of, i.e., dim, two lighting loads, hereafter
referred to as lighting loads A and B, according to the status of
one or more of the sensors. Each of lighting loads A and B can be a
single light source or a group of connected light sources. The
sensors can be, for example, occupancy or vacancy sensors of the
passive infrared or ultrasound type. Controller 100 includes a
housing 110. The top surface of housing 110 includes three buttons,
switches or other suitable controllers 112, 114, and 116, and
corresponding LEDs 118, 120, 122. Buttons 116 and 114 are for
manually connecting and disconnecting lighting loads A and B,
respectively, to AC power via relays 164 and 166 inside of the
controller 100 which are illustrated in FIG. 3. LEDs 122, 120 each
indicate the status of, respectively, the relay for loads A and B,
i.e., whether or not that relay is in a power-connection state.
Button 112 is for controller configuration. Button 112 can be used
to put the controller into a learn mode. LED 118 adjacent to button
112 blinks periodically, for example once every three seconds, when
the controller's communication channel is operating properly.
[0014] The front of controller 100 includes two network ports 124,
126. Each of networks ports 124, 126 can be used to connect
directly to a sensor. Alternatively, one of network ports 124, 126
can be used to connect to a computer network through a router,
switch, hub, or other type of network device, so that the
controller 100 can communicate with other controllers, as well as
with sensors that are not directly connected to controller 100.
[0015] The front of controller 100 also includes two low voltage
connectors 128, 130. Each one of connectors 128, 130 can receiving
two low-voltage wires for transmitting a low-voltage signal.
Connector 128 can output a 0-10V dimming-control signal for
lighting load A, and connector 130 can output a 0-10V
dimming-control signal for lighting load B. Two low-voltage wires
connected to connector 128 or connector 130 can transmit a
dimming-control signal to the appropriate dimming device for the
lighting load, for example, an LED driver or a ballast for
fluorescent lighting. Thus, through connectors 128, 130, controller
100 can provide two independent dimming-control signals for
independent dimming control of two lighting loads or two groups of
lighting loads.
[0016] FIG. 2 shows a rear perspective view of the controller 100
shown in FIG. 1. The rear side of controller 100 includes a
knock-out ("KO") nipple 102 having threads on its outer surface.
The KO nipple can be used to mount the controller 100 to, for
example, an opening in a high-voltage electrical box. Exiting the
controller 100 through the KO nipples are five wires. Power wires
132, 134, and 136 are respectively for input power, output power
for lighting load A, and output power for lighting load B. Power
wire 138 is a neutral wire that is shared by lighting loads A and
B. Low voltage wires 140, 142 are for providing a 0-10V
dimming-control signal for lighting load A. Low voltage wires 140,
142 carry the exact same dimming-control signal that is output by
connector 128. In this way, an installer of a lighting control
system can choose to deliver the dimming-control signal via the
class 1 wires 140, 142, which can travel in common enclosed spaces
with other class 1 wires, including AC power wires, or via class 2
wires or a class 2 cable. This option provides the installer with
greater flexibility when making the installation. Low voltage wires
144, 146 are for providing a 0-10V dimming-control signal for
lighting load B. Low voltage wires 144, 146 carry the exact same
dimming-control signal that is output by connector 130. In this
way, an installer of a lighting control system can choose to
deliver the dimming-control signal to lighting load B via the class
1 wires 144, 146, which can travel in common enclosed spaces with
other class 1 wires, including AC power wires, or via bare class 2
wires or wires in a class 2 cable. This option provides the
installer with greater flexibility when making the
installation.
[0017] FIG. 3 shows a rear perspective exploded view of the
controller 100 shown in FIG. 1. As can be seen in FIG. 3, inside of
cover 112 of controller 100 there is a first circuit board 160 and
a second circuit board 162. Circuit board 160 primarily holds
components that transmit and affect AC power, although it also
contains circuits that transmit DC signals. Relays 164 and 166 are
mounted to first circuit board 160. Relays 164, 166 can be
individually opened and closed to, in the case of relay 164,
connect the AC power to the lighting load A, or, in the case of
relay 166, to connect AC power to lighting load B. Second circuit
board 162 primarily holds components that transmit and condition DC
power signals, including the logic signals input and output from
the controller's main processor, as well as the class 2 circuits.
Using separate boards helps to maintain the separation between
class 1 and class 2 circuits that is required by the NEC.
[0018] FIG. 4 shows a schematic of part of the circuitry located on
the AC circuit board 160 in the controller 100 shown in FIG. 1. A
high-voltage pulsating signal passes through the input coil 204 of
a transformer 202. Input coil 204 is part of a class 1 circuit and
therefore is able to carry the high-voltage signal. The transformer
has three output coils 206, 208, 210. The pulsating signal passing
through input coil 204 induces a 12V pulsating signal in both coils
206 and 208. The 12V pulsating signal in coil 206 is used for the
generation of the dimming signals that is suitable for class 1
transmission and the 12V pulsating signal in coil 208 is used for
the generation of the dimming signals that are suitable for class 2
transmission. Thus, through the use of a transformer a high-voltage
signal that can only be transmitted in a class 1 circuit can be
used to generate a suitable signal for use in low-voltage class 2
circuits without violating the requirement that class 1 and class 2
circuits be isolated from each other. The pulsating signal passing
through input coil 204 induces a 24V pulsating signal in coil 210
that is used for powering the main processor and other logic
circuits and for energizing the relays 164, 166.
[0019] FIG. 5 shows a schematic of circuitry 300 that is used to
condition a 12V DC signal into a 0-10V DC dimming-control signal.
Controller 100 contains four sets of circuitry 300, two sets on
circuit board 160 and two sets on circuit board 162. One of the
sets of circuitry 300 on each of first and second circuit boards
160, 162 is for generating a dimming-control signal for load A. The
dimming-control signal for lighting load A generated on first
circuit board 160 is the exact same as the dimming-control signal
for lighting load A generated on the second circuit board 162. The
other of the sets of circuitry 300 on each of first and second
circuit boards 160, 162 is for generating a dimming-control signal
for load B. The dimming-control signal for lighting load B
generated on first circuit board 160 is the exact same as the
dimming-control signal for lighting load B generated on the second
circuit board 162. In the case of the two sets of circuitry 300 on
first circuit board 160, the 12V DC signal is created by
conditioning the 12V pulsating signal generated in output coil 206
of transformer 202. In the case of the circuitry 300 on second
circuit board 162, the 12V DC signal is created by conditioning the
12V pulsating signal generated in output coil 208 of transformer
202.
[0020] The particular level of the 0-10V signal output from
circuitry 300 is determined by a pulse-width-modulated ("PWM")
signal output by the main processor of controller 100. The duty
cycle of the PWM signal determines the ultimate value of the 0-10V
signal. That PWM signal is inputted to circuitry 300 at 310. A
first PWM signal is input to both the circuit 300 on first circuit
board 160 for lighting load A and the circuit 300 on the second
circuit board 162 for lighting load A. However, for the circuitry
300 on first circuit board 160, that PWM input signal cannot
directly interact with the rest of the conditioning circuit without
interconnecting class 1 circuitry with a low-voltage digital-logic
circuitry (the circuitry for the processors). Instead, the PWM
input signal is passed through the input of the opto-coupler 312,
which is part of the digital logic circuitry. The output of the
opto-coupler 312 is part of the class 1 circuitry. The opto-coupler
is able to reproduce the signal on its input at its output while
maintaining isolation between the input and output by using light
energy. Once the signal is transmitted to the class 1 circuitry it
can be used to condition a 12V DC signal into a 0-10V DC signal
that is related to the duty-cycle of the PWM signal using standard
circuit components in a manner that will be apparent to a person
having ordinary skill in the art. The circuit components include
one or more operational amplifiers 314.
[0021] The same input PWM signal input to the circuitry 300 for
load A on circuit board 160 is input to the circuitry 300 for load
A on circuit board 162, where it is also transmitted via an
opto-coupler, but this time to class 2 circuitry. The result is a
class 2 dimming-control signal for load A on circuit board 162 that
is the exact same as the class 1 dimming-control signal for load A
that is generated on circuit board 160. Similarly, a second input
PWM signal can be input to both the circuitry 300 for load B on
circuit board 160 and the circuitry 300 for load B on circuit board
162. The result is a dimming-control signal for load B generated on
circuit board 160 that is appropriate for class 1 transmission and
an identical dimming-control signal for load B generated on circuit
board 162 that is appropriate for class 2 transmission. In this
manner, a single PWM input signal can generate a dimming-control
signal in a class 1 circuit and the exact same dimming-control
signal in a class 2 circuit without violating the separation
required between class 1 and class 2 circuits.
[0022] Class 1 and class 2 circuits are defined by the National
Electrical Code. As used herein class 1 circuits are (1) remote
control or signaling circuits that do not exceed 600 volts or (2)
power-limited circuits that do not exceed 30 volts, 1000VA. As used
herein, class 2 circuits are current limited remote control or
signaling circuits that do not exceed 150 volts at 0.005 amps.
[0023] While the preferred embodiments of the devices and methods
have been described in reference to the environment in which they
were developed, they are merely illustrative of the principles of
the inventions. The elements of the various embodiments may be
incorporated into each of the other species to obtain the benefits
of those elements in combination with such other species, and the
various beneficial features may be employed in embodiments alone or
in combination with each other. Other embodiments and
configurations may be devised without departing from the spirit of
the inventions and the scope of the appended claims.
* * * * *