KR101456928B1 - A dimming control device for lighting device using PLC system - Google Patents

Abstract

The present invention relates to a dimming control device for a lighting device based on a power line which performs dimming control for a power line of a lamp by a communication unit, and transfers control information using a firing angle by forming the firing angle by blocking power on a part where a phase-to-phase voltage becomes zero volts. The dimming control device for a lighting device based on a power line includes: a master controller which carries an illumination control signal indicating a dimming level in an AC power (hereinafter referred to as first AC power) by forming a firing angle at a zero voltage cross point of the first AC power to transmit the first AC power; and a slave controller which receives an AC power (hereinafter referred to as second AC power) transmitted from the master controller to interpret the illumination control signal, and transmit a dimming control signal to a power supply device of the lamp in accordance to a dimming level of the illumination control signal. The illumination control signal provides a configuration indicated by the number of half period wave of the AC power in which the conducting angle is formed. According to the dimming control device for a lighting device based on a power line, the dimming control may be performed using a power line without using a separate wired/wireless communication medium, and deterioration of the power quality in the power line may be minimized.

Description

[0001] The present invention relates to a dimming control device for a power line-based lighting device,

The present invention relates to a power line base for transmitting control information using a conduction angle by forming a firing angle by shutting off power at a portion where an inter-phase voltage becomes 0 volts, To a dimming control apparatus of a lighting apparatus.

In recent years, there is a continuing increase in the demand for dimming control in the field of lighting due to power shortage, in order to increase the efficiency of the lamp and to reduce the illuminance more than necessary. As the power supply of a lighting device develops, most lighting devices including a discharge lamp, an LED, and the like are produced in a dimmable state.

In order to realize dimming in a lighting device, a controller for controlling dimming must deliver a dimming control signal to a device that supplies power to the lighting device, i. E., A power supply located near the lighting device.

The method of transmitting the dimming control signal includes a method using a wire control communication line, a method using wireless communication, and a power line communication (PLC) modem method using a power line.

First, a system using a separate wired control communication line is a wired communication system in which a wired communication line other than a power line is additionally provided, and a control signal is transmitted to the lighting apparatus through a predetermined protocol through the communication line. For example, DMX-512 (digital mutiplex 512), a lighting control protocol for performance stage lighting, and digital addressable lighting interface (DALI), which is used as an international standard for digital lighting. The use of a separate control communication line as described above has the advantage that the lighting control signal can be reliably transmitted at a high speed, but there is a disadvantage that equipment cost is increased because additional communication wiring is required. In addition, when additional wiring work can not be performed, the above-described method can not be applied.

Next, the wireless communication system transmits a dimming control signal using wireless communication such as Zigbee (2.4 GHz) and Sub-GHz RF (100, 400, 800, 900 MHz). Unlike the wired communication method, the wireless communication method has an advantage that it can be freely configured because no additional wiring is provided. However, since the radio communication (RF) environment can be changed by an obstacle or the like, there is a problem that the reliability of communication is lowered.

In addition, the power line communication (PLC) modem method uses a power line modem for data communication. That is, it transmits the dimming control signal of the lighting device to the power line communication modem. Therefore, since the wiring is not added, the wiring equipment cost is saved. However, since a relatively expensive power line modem should be installed in the controller and all the power supply units, there is a limit to the application cost due to an increase in the number of lamps to be controlled by the dimming control. The transmission distance and the power quality The communication quality of the power line modem may be deteriorated.

On the other hand, a triac dimming method which is different from the above method has been widely applied in the field of dimming control of an illumination apparatus.

As shown in FIG. 1, the triac dimming method is a method of adjusting the effective current by changing the angle of cutoff of the current supplied to the lighting device by configuring a phase control circuit as a triac, which is a kind of thyristor. The waveform shown by the dotted line in Fig. 1 is the current waveform before the dimming control, and the solid line is the current waveform after the dimming control. That is, it blocks some phase angle of the current supplied to the illumination device through the phase angle control.

The Triac dimming method is used directly connected to the commercial power supply. Particularly, since the triac dimming method instantaneously cuts off the current, it is suitable for dimming of incandescent lamp and halogen which slow the reaction speed for several tens of ms until the divergence of light stops when the current is cut off.

In case of LED, it can be directly connected to commercial power source without power supply device according to the arrangement structure of LED device. That is, it is possible to directly control the current of the commercial power supply for triac dimming control. However, LEDs have a flicker phenomenon when the triac dimming control is applied because the reaction speed due to the current is as fast as several ns. Also, when a power supply for LEDs is used, the operation of general products may become unstable. To overcome this, triac dimming control can be applied by fabricating a power supply that is compatible with triac dimming.

In addition, discharge lamps such as fluorescent lamps and CDM (Ceramic Discharge Metal Halide) use a ballast to limit current to the inductor. At this time, it is difficult to control the dimming in the magnetic ballast, but in the electronic ballast, it is possible to make the dimming control possible by adding the output current control function inside.

The three methods for transmitting the dimming control signal described above can transmit and receive bidirectional digital data at high speed. On the other hand, the triac dimming control method can only adjust the angle of cutoff of the phase control in one direction. However, in order to perform the dimming control, a simple dimming control command such as a dimming level or a change of a dimming step may be transmitted to the power supply units of a plurality of lighting apparatuses. Therefore, it is effective to implement the dimming control by applying the phase control method of the triac dimming using the power line.

Therefore, many techniques of the dimming control method using the phase control as described above have been proposed. In one prior art technique, phase control is used to create a short blocking angle in a half period to represent bit 0 or 1, which is the minimum unit of digital data to be blocked in the half-cycle [1, 2]. And the digital data to be transmitted is expressed by a combination of the half-period. However, since the prior art described above expresses 1 bit in the half period of the AC, the digital data communication using the same can transmit information of 120 bps at the power of 60 Hz. However, when the information is transmitted, the power quality deteriorates instantaneously, so that some errors occur in the digital bit stream, which causes distortion of the information. In order to correct the error, an error correction code can be introduced, but the transmission time becomes longer, which increases the chance of transformation.

In another prior art, a method has been proposed in which dimming information is provided in an arrangement pattern of a half-cycle in which the half cycle of the AC power source can be blocked entirely [Patent Document 3]. However, since this prior art cuts off the entire half cycle of the AC power, the power quality is relatively undermined.

In another prior art, a method of expressing dimming information with a blocking angle through a phase control in one half-period has been proposed [Patent Document 4]. The blocking angle or conduction angle made by the phase control by this prior art may be misinterpreted according to the power quality, especially the voltage-dip, the sag, the harmonic distortion, and the like. Further, there is a problem that different dimming levels can be recognized depending on the individual deviation and the temperature characteristic of the receiving-side elements.

[Patent Document 1] Korean Published Patent Application No. 2003-0065854 (published on Aug. 2003, 2003) [Patent Document 2] Korean Published Patent Application No. 2008-0099124 (published on November 12, 2008) [Patent Literature 3] Korean Patent No. 10-1002869 (issued on December 21, 2010) [Patent Document 1] Korean Patent No. 10-1293182 (Announcement 2013.08.05)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting apparatus for dimming control of a power line of a lighting apparatus by a communication means and to cut off electric power at a portion where the phase voltage becomes 0 volt to form a firing angle And to provide a dimming control device of a power line-based lighting device that transmits control information using a conduction angle.

In particular, it is an object of the present invention to provide a power line-based illumination system that generates a conduction angle in a half period waveform of an AC power source to transform it into a signal waveform, and transmits a light intensity control signal indicative of the illumination level (or dimming level) And to provide a dimming control apparatus of the apparatus.

In particular, it is an object of the present invention to provide a method and apparatus for receiving an AC power source including a roughness control signal, determining the size of a power source for each half-period waveform of the AC power source, comparing a signal waveform with a previous half- And to provide a dimming control device of a power line-based lighting device for analyzing a control signal.

According to an aspect of the present invention, there is provided a dimming control apparatus for a power line-based lighting apparatus for controlling a dimming level of a lamp, including a dimming control unit for generating a dimming angle at a zero voltage crossing point of an alternating- Level control signal to the first alternating-current power supply; And a controller for receiving the AC power transmitted through the master control device (hereinafter referred to as a second AC power supply), analyzing the illumination control signal from the second AC power supply, And a slave control device for transmitting a dimming control signal to the supply device, wherein the illumination control signal is represented by the number of half-cycle waveforms of the AC power source (hereinafter referred to as signal waveforms) at which the conduction angle is formed.

Further, in the dimming control apparatus of the power line-based lighting apparatus, the illumination control signal is characterized in that the dimming level is displayed by the number of consecutive signal waveforms in the AC power supply.

Further, the present invention provides a dimming control apparatus for a power line-based lighting apparatus, wherein the master control apparatus includes a switch for connecting the first AC power supply to any one of the second AC power supply and the triac connected to the second AC power supply When the illumination control signal is generated, the lamp is connected to the triac, and when the illumination control signal is generated, the lamp is directly connected to the second AC power source.

Further, in the dimming control apparatus of the power line-based lighting apparatus, the slave control apparatus obtains the size of the power source for the half-period waveform of the second AC power source, calculates the size of the half- And the illuminance control signal is analyzed in comparison with the illuminance control signal.

Further, in the dimming control apparatus of the power line-based lighting apparatus, the slave control apparatus starts the illuminance control signal when the measured half-wave period size becomes smaller than the size of the previous half period waveform, The number of half-cycle waveforms in the roughness control signal is counted, and the number of half-cycle waveforms is determined as the number of the signal waveforms.

Further, the present invention is a dimming control apparatus for a power line-based lighting apparatus, wherein the slave device includes: a full-wave rectifier for rectifying the second AC power to convert it into DC power; A comparator that compares the size of the DC power source with a predetermined reference power source and generates an interrupt signal when the size of the DC power source is small; A capacitor for charging the DC power supply; A transistor for discharging or charging the capacitor according to an on / off signal; And an on / off signal is sent to the transistor to convert the charged amount to digital before storing the charged power for a unit time at a unit time interval, and stores the charged amount between the interrupts, And a microprocessor for obtaining a power supply size.

Further, the present invention provides a dimming control apparatus for a power line-based lighting apparatus, wherein the master control apparatus measures power quality of the first AC power supply, and when the power quality satisfies a predetermined quality criterion, To the mobile station.

Further, the present invention provides a dimming control apparatus for a power line based lighting apparatus, wherein the power quality is at least one of a harmonic active power, a voltage sag, a current fault, and a total harmonic distortion .

As described above, according to the dimming control apparatus of the power line-based lighting apparatus according to the present invention, dimming control can be performed using a power line without using a separate wired / wireless communication medium, and at the same time, deterioration of the power quality of the power line can be minimized An effect can be obtained.

1 is a current waveform diagram showing a waveform of a current waveform before and after dimming control according to a conventional triac dimming method.
2 is a block diagram of a configuration of a dimming control apparatus of a power line-based lighting apparatus according to an embodiment of the present invention.
3 is a block diagram of a configuration of a master control apparatus according to an embodiment of the present invention;
4 is a waveform diagram of a normal AC power source and an AC power source including a roughness control signal according to an embodiment of the present invention.
5 is a block diagram of a configuration of a slave control apparatus according to an embodiment of the present invention;
6 is a circuit configuration diagram of a command input unit of a slave control apparatus according to an embodiment of the present invention.
FIG. 7 is a waveform diagram of a current or signal processed in an instruction input unit according to an embodiment of the present invention. Waveform 1 is a waveform diagram of an AC power source input to an instruction input unit. Waveform 2 is a waveform diagram of a rectified DC power source. 3 is a waveform diagram of an interrupt signal by a comparator.
8 is a flowchart for explaining a method of analyzing an illuminance control signal in a slave control apparatus according to an embodiment of the present invention.
9 is a circuit configuration diagram of a dimming control signal generating unit of a slave control apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

In the description of the present invention, the same parts are denoted by the same reference numerals, and repetitive description thereof will be omitted.

First, a dimming control apparatus of a power line-based lighting apparatus according to the present invention will be described with reference to FIG.

2, the dimming control apparatus of the power line-based lighting apparatus includes a master controller 100 for generating an illuminance control signal in accordance with the illuminance control command input through the illuminance input device 16, And a slave controller 200 that receives the power through the power line and adjusts the current of the power supply of the lighting device such as a lamp.

The master control apparatus 100 includes an illuminance input device 16 for receiving an input command (or an illuminance adjustment command) for illuminance adjustment from a communication device or a user's direct operation. The master control apparatus 100 further includes a triac 12 connected in series to a power line of an AC power source (or AC power source) The control signal is inputted to the current of the AC power source. The AC power source including the illumination control signal is supplied to the slave control device 200.

The slave control device 200 is a control device installed in the power supply device 24 of the lamp lighting device and extracts the roughness control signal generated by the master control device 100 from the current of the AC power source. The slave control device 200 analyzes the intensity control signal extracted from the power line and adjusts the output current of the power supply device (SMPS, etc.) of the illumination device such as the lamp. In this way, the illuminance of a lighting device such as a lamp is adjusted.

At this time, the slave control device 200 may be integrally formed in the power supply device 24, or may be a separate device and used in connection with the power supply device 24.

Preferably, the lighting device such as a lamp is an LED lighting device such as an LED lighting device.

On the other hand, for convenience of explanation, the AC power supplied to the master control apparatus 100 will be referred to as a first AC power supply, and the AC power output through the master control apparatus 100 will be referred to as a second AC power supply . The second AC power source is an AC power source that is supplied to the slave controller 200, the lamp, or the power supply 24 of the lamp through the master controller 100. The second AC power may be the first AC power itself or may be a first AC power including the illumination control signal. In addition, when there is no need for distinction, the first and second AC power sources are mixed with AC power or AC power.

Next, a configuration of a master control apparatus 100 of a power line-based lighting apparatus according to an embodiment of the present invention will be described with reference to FIG.

3, the master control apparatus 100 includes a switch 10, a triac 12, a power source side portion 13, an AC-DC power source conversion portion 14, a first microprocessor 15, , And a dimming command control section (17).

The switch 10 is a switch capable of selectively connecting a second AC power source (AC power source output through the master control device) or a triac 12 connected to the second AC power source. When the switch 10 is connected to the second AC power source, the originally inputted AC power source (or the first AC power source) is completely supplied to the lighting device such as the lamp without adjusting the illumination. When the switch 10 is connected to the triac 12, the illuminance of the illuminating device such as the lamp is adjusted in accordance with the illuminance control signal generated by the triac 12. That is, the illuminance control signal is included in the second AC power supplied to the illumination device.

Preferably, the switch 10 is of the single pole double throw (SPDT) type and is connected to the triac 12 when a voltage is applied. If the voltage is not applied, And is directly connected to the second AC power source. Therefore, even if the control circuit such as the first microprocessor 15 does not operate due to a failure or the like, the power supply is continuously supplied to the lower stage.

When an external illuminance adjustment command is input, the first microprocessor 15 operates the switch 10 by the illumination adjustment command to connect the switch 10 to the triac 12.

The power source side section 13 measures the characteristic information about the power source flowing through the power line. Preferably, a commercialized energy integrated circuit (IC) is used. As an example, there is a commercially available CS5463 chip that measures power quality such as ineffective power voltage and current phase and total harmonic distortion (THD) in an electronic watt-hour meter.

The power source side section 13 measures the voltage, current, power factor, harmonic active power, voltage sag, and current fault of the power line. Also, the power source side part 13 constitutes a zero-crossing detector circuit to detect a time point when the voltage of the AC power source becomes 0 volt, and transmits it to the first microprocessor 15.

The reason why the power supply characteristic information is detected is that when a part of the waveform (sinusoidal wave) of the input power source is cut by firing the triac 12 in order to generate the roughness control signal, .

Preferably, the quality state of the AC power source is monitored in advance and the power quality is calculated, so that it can be used for the roughness control condition or the like. For example, power quality such as total harmonic distortion is calculated, and the illuminance is adjusted by the triac 12 only when the total harmonic distortion is below a certain threshold value.

Preferably, the master control device 100 is provided with a display unit (not shown) to display information on power characteristics or power quality factors obtained by the power source side unit 13. For example, each element of the power quality such as the amount of power consumed, the voltage, and the power factor consumed in the slave control apparatus 200 can be extracted and displayed.

Next, the AC-DC power conversion unit 14 converts the AC-DC power conversion unit 14 to the master control unit 200 or each component, for example, the power source side unit 13, the first microprocessor 15, Input device) 16 in accordance with the present invention.

The user I / F or the illuminance input device 16 is an apparatus that receives (receives) a light intensity adjustment command from the outside, and is connected by communication means such as RS-232, RS-485, or Ethernet. Preferably, the illuminance input device 16 may be connected to a central control computer, an illuminance sensor, a motion detection sensor, or the like, and receives a dimming control command (or a light control command). Also, the illuminance input device 16 may be manually input by the user.

The first microprocessor 15 receives a dimming request (or illumination control command, dimming control command) from the illuminance input device 16. Alternatively, the first microprocessor 15 processes the dimming control command corresponding to the execution condition if the execution condition of the previously programmed dimming control occurs.

That is, the first microprocessor 15 confirms the time (or phase) (zero voltage crossing point) at which the zero crossing is made from the power supply characteristic information received from the power supply side section 13, And turns the triac 12 on.

Then, the dimming command control unit 17 generates an on-off signal for cutting off the waveform of the commercial power input power source (or the first AC power source) in units of half the commercial power source. In particular, it causes the formation of a power waveform that matches the dimming requirement of the illumination control command (or dimming control command). FIG. 4 shows waveforms suitable for dimming conditions of the dimming control command according to the present invention. That is, the dimming command control unit 17 forms the conduction angle at the zero potential crossing point within the waveform of the half period in the first alternating current power source, so that the illumination control signal is included in the first alternating current power source.

In addition, the first microprocessor 15 forms a power waveform suitable for the illumination control command, and moves the contact 11 of the switch 10 to the second position to directly connect the second AC power again.

When there is data to be transmitted, the first microprocessor 15 compares the power quality with a reference value and starts transmission when the condition is satisfied. The reference value is stored in a programmable variable. In addition, the reference value is set in advance. As described above, the first microprocessor 15 determines whether to transmit the illuminance control signal according to the power characteristics indicating the power quality such as the voltage, current, power factor, harmonic active power, instantaneous voltage drop, and fault current of the power line.

Next, a waveform of an AC power source formed by the master control apparatus 100 of the power line-based illumination apparatus according to the embodiment of the present invention will be described with reference to FIG.

4 is a waveform diagram showing an AC power source including a sinusoidal wave of an AC power source input to the master control device 100 and a half-wave phase having a conduction angle. In FIG. 4, a half-wave form having a conduction angle is indicated by a comb-like shape.

On the other hand, a half period waveform having a conduction angle is called a signal waveform, and a half period waveform having no conduction angle is called a normal waveform. That is, in FIG. 4, the comb-like half-period waveform is a signal waveform, and the other half-period waveform is a normal waveform.

As shown in FIG. 4, the master control apparatus 100 generates and includes a roughness control signal by the number of half-cycle waveforms (or signal waveforms) having a conduction angle in the AC power source. In particular, the illuminance ratio is determined by the number of consecutive numbers.

In other words, to output 100% of the illuminance, only one half-wave form (or signal waveform) with a conduction angle is generated. To output 90% of the illuminance, two signal waveforms are generated consecutively. Three signal waveforms are generated consecutively. That is, it is assumed that the signal waveform has three lines of roughness of 70%, four signal waveforms of roughness of 60%, five signal waveforms of roughness of 50%, six signal waveforms of roughness of 40%, seven signal waveforms of roughness of 30% A roughness degree of 20%, and a signal intensity of 9%.

The master control device 100 turns off the triac 12 in the waveform output from the zero-crossing detector circuit portion of the power source side portion 13. That is, the triac 12 is turned off for a predetermined time (hereinafter referred to as break time) from the point where the zero voltage crosses (zero crossing point). Then, after the cut-off time, the trailer 12 is turned on again. Thus, a blocking angle (or conduction angle) is created during the blocking time from the zero voltage crossing point.

That is, the time to create the blocking angle begins with a zero crossing. Preferably, the blocking time is basically set to 1 msec. The possible range of use is 0.4 to 3 ms. Experiments indicate that the recognition rate in the slave control apparatus 200 is remarkably reduced or the power quality of the commercial power supply is adversely affected if the range is exceeded. In addition, the setting of the cutoff time can be set differently according to the characteristics of the user area, the size of the control load, and the like.

When the illumination control signal is generated by the illumination control command and the transmission of the AC power is completed, the master control apparatus 100 switches the contact 11 of the switch 10 to the second AC power source (No. 2 in FIG. 3) And the triac 12 is turned off. The completion of transmission of the roughness control signal is set based on the number of times of the signal waveform of the roughness control signal according to the roughness adjustment command, which is recognized and judged by the first microprocessor 15.

Next, a configuration of a slave control apparatus 200 of a power line-based lighting apparatus according to an embodiment of the present invention will be described with reference to FIG.

5, the slave control apparatus 200 includes an instruction input unit 20, a second microprocessor 21, and a dimming control signal generator 22.

Meanwhile, the lamp is provided with a power supply 24 for supplying power such as a switching mode power supply (SMPS), and the slave control device 200 is connected to the power supply device 24 to supply a dimming control signal to the power supply device 24). The slave control device 200 is integrally formed with the power supply device 24 and one substrate, or independently configured and connected to each other through a connector or the like.

The slave control device 200 or the power supply device 24 is connected in parallel to a commercial power supply or a power line (or a second alternating current power supply) which is output through the master control device 100. The slave control device 200 receives the intensity control signal generated in the master control device 100 through the second AC power source. That is, the illumination control signal is transmitted by the electric power transfer system.

Specifically, the master control apparatus 100 cuts and supplies the waveform of the second AC power supplied to the slave control apparatus 200 by operating the switch 10, while partially cutting off the waveform of the second AC power supplied to the slave control apparatus 200, And transmits the control signal. When the transmission of the illuminance control signal is completed, the master control device 100 operates the switch 10 to turn off the triac 12 so that the commercial power whose waveform is not broken can be directly transmitted to the slave control device 200 or the lamp To the backlight device.

The slave control device 200 receives a commercial power source including the luminance control signal generated by the master control device 100 or a commercial power source supplied without being deformed by the luminance control signal and supplies the commercial power source Power source). Then, the slave control device 200 interprets the command of the detected intensity control signal and generates a dimming control signal 23 for controlling the power supplied to the lamp so as to be a condition suitable for the command, so that the lamp power supply 24 . At this time, the illuminance control signal and the dimming control signal suitable for the signal command can be set in advance by a table or the like. On the other hand, the dimming control signal 23 sent to the power supply 24 is output as a signal such as PWM (Pulse Width Modulation).

First, the command input unit 20 extracts an interrupt signal at a zero voltage intersection point and a power source size of a half-wave period waveform from a second AC power source transmitted through the master control apparatus 100, and transmits the extracted power level to the microprocessor 21.

The microprocessor 21 receives the interrupt signal and the power source size of the half period waveform from the command input unit 20 to determine whether the half period waveform is a normal waveform or a signal waveform and counts the number of signal waveforms to determine a dimming level do. Then, the microprocessor 21 causes the dimming control signal generator 22 to generate a PWM waveform (or a dimming control signal) according to the recognized dimming level.

The dimming control signal generator 22 transmits the dimming control signal to the power supply 24 of the lamp. Preferably, the dimming control signal generator 22 outputs the dimming control signal of the PWM waveform to the output terminal 23 via the photodiode, or changes the PWM waveform to 0-10 V through a low-pass filter and outputs the PWM waveform. The final dimming control signal 23 is transmitted to the power supply 24 of the lamp.

The power supply unit 24 receives the dimming control signal 23 to emit the LED lamp in a timed manner to adjust the illuminance of the lamp. The power supply device 24 is a well-known SMPS circuit for controlling the supply power of the LED lamp, and a detailed description thereof will be omitted.

On the other hand, the AC-DC power conversion unit 25 is a device for supplying power necessary for operation of the slave control device 200, and converts the AC power into DC power and provides it.

Next, the instruction input unit 20 of the slave control device 200 according to an embodiment of the present invention will be described in more detail with reference to FIGS. 6 and 7. FIG.

The command input unit 20 generates an interrupt signal at the zero voltage crossing point from the second AC power source, charges the power source size per unit time of the second AC power source, and outputs the interrupt signal and the power amount per unit time to the microprocessor 21).

In particular, the command input unit 20 generates an interrupt signal by comparing the absolute value of the voltage of the second AC power supply with a predetermined voltage value (hereinafter referred to as a reference voltage). If the absolute value of the voltage is higher than the reference voltage, it is turned on (On or a high level signal). If the absolute value of the voltage is less than the reference voltage, it is turned off (off or low level signal).

6, the AC voltage (or the second AC power) 30 input to the command input unit 20 is a power that is waveform-cut by the circuit 12 in the master control apparatus 100, Is a commercial power supply bypassed by the operation of the switch 10 of the controller 100. [ That is, the second AC power source is composed of a signal waveform or a normal waveform.

For example, the waveform 1 shown in FIG. 7 is a second AC power input to the command input unit 20, and all four half-period waveforms are formed. If the respective half period waveforms are T1, T2, T3, and T4 in time order, the half period waveforms T1, T2, and T4 are normal waveforms, and the half period waveform T3 is the signal waveform including the conduction angle.

The input AC power source 30 is connected to a protection circuit 31 such as a varistor for overvoltage protection. The second AC power through the protection circuit 31 is rectified and supplied to the power source of the slave control device 100. [ That is, the AC power source is converted into a DC power source (DC power source) via the noise filter 32 and the bridge diode 33. And the power conversion unit 34 to a power source 35 necessary for an internal circuit of a receiver or a circuit not shown.

On the other hand, the second AC power supply 30 through the protection circuit 31 is full-wave rectified and the voltage is lowered. That is, the input power of the waveform 1 passes through a full-wave rectifier 40 composed of two diodes, and lowers the voltage by the ratio of the first resistor 41. Preferably, the ratio of the first resistor 41 is 1/100 so that the waveform size is reduced. Further, the maximum value is limited to 5 volts or less by the zener diode (G). A DC power source 42 having a rectified and dropped voltage appears as shown in waveform 2 of FIG.

The comparator 49 compares the reference voltage made by the DC power supply 42 and the variable resistor 43 and outputs a comparison waveform (or an interrupt signal) as shown in waveform 3 of FIG. And outputs a high level when the DC power supply 42 is higher than the reference voltage and outputs a low level when the DC power supply 42 is low.

The interrupt signal, which is the output of the comparator 49, is connected to the interrupt pin of the microprocessor 21. The microprocessor 21 is set to interrupt at the falling edges 51, 52 and 53 of the output of the comparator 49. [ As the reference voltage is lowered by adjusting the variable resistor 43, the interval of the low level is shortened, so that the interruption point is close to the zero volt point (or zero voltage crossing point). The microprocessor 21 is interrupted every time when the AC power source 30 is turned on until the AC power source 30 is turned off.

The DC power supply 42 is charged to the AD conversion pin of the microprocessor 21 while being charged with the capacitor 46 via the diode 44 and the second resistor 45. The microprocessor 21 can turn on the transistor 48 to discharge the voltage charged in the capacitor 46. [ The microprocessor 21 can turn off the transistor 48 and charge the DC voltage 42 to the capacitor 46. [ The diode 44 allows the DC power source 42 to maintain the shape of the waveform 2 of FIG. The second resistor 45 regulates the charging rate of the capacitor 46 and the third resistor 47 regulates the discharging rate of the capacitor 46.

In other words, the DC power supply 42 is charged into the capacitor 46 for a unit time by turning the transistor 40 on and off every unit time, and the charge amount is converted into an AD conversion value and input to the microprocessor 21 . That is, the microprocessor 21 inputs the DC power charge amount for the unit time.

Next, a method of finding a signal waveform by the microprocessor 21 of the slave control device 200 according to an embodiment of the present invention will be described with reference to FIG. The microprocessor 21 determines whether there is a signal waveform (waveform cut by the triac 12) generated by the master control device 100 for each half-cycle waveform inputted in the circuit configuration of Fig.

First, the microprocessor 21 waits until the first interrupt is input (S1). And waits for a digital signal (or an interrupt signal) such as 51, 52, 53 in the waveform 3 of Fig. The interrupt signal is an off signal (or low low level signal) generated at a zero voltage crossing point (zero crossing).

Next, when an interrupt occurs, the microprocessor 21 turns on the transistor 48 to discharge the voltage charged in the capacitor 46 and turn off the transistor 48 to start charging ( S2).

Next, the voltage charged in the capacitor 46 is AD-converted after the time stored in the programmable variable (hereinafter referred to as the sensing unit time) and stored (S3). That is, the charged power size for a unit time is digitally converted and stored.

The sensing unit time may be changed according to the time when the master control device 100 cuts off the commercial waveform from the input AC power source via the triac 12. [ Preferably, the detection unit time is set to 0.2 ms. The time range of the sensing unit time is settable so that the designer can adjust it.

Immediately after the AD conversion, the transistor 48 is turned on to discharge the voltage charged in the capacitor 46, and the transistor 48 is immediately turned off to start charging (S4).

Next, steps S12 and S13 are repeated for the number of variables stored in the programmable variables (hereinafter referred to as the unit sensing number) (S5). Preferably, the unit detection number is set to 40. This is the time equivalent to half a period when the waveform of the commercial power source is 60 Hz. In other words, it is done in half a week.

Next, the 40 AD-converted and stored values are summed to be the size of the half period (S6). If the part where the waveform is cut (or conduction angle) is a normal zero crossing, it appears as a digital pulse signal like 51. That is, a signal of the form between 51 and 52 will appear in FIG. On the other hand, if the waveform is a waveform cut by the intensity control signal, a waveform like 52 to 53 will appear. The microprocessor 21 controls the switch transistor 48 to AD-convert the magnitude of the charge voltage stored in the capacitor 46 and store it.

Next, it waits for the next interrupt 52 to be input (S7). That is, it is determined whether or not the first interrupt is generated, and if it is the second interrupt, the process is repeated from the first interrupt waiting step S1 (S8).

Next, if it is not the first interrupt, that is, if it is the second and subsequent interrupts, the size of the half-cycle obtained from the current interrupt is compared with the size of the half-cycle obtained from the previous interrupt (S9). This is for distinguishing between a normal waveform (normal waveform) and a signal (signal waveform) in which a part of the waveform is cut by the roughness control signal.

First, if the size is smaller than the previous one and the size (or the amount of change) is greater than the value stored in the programmable variable (the minimum amount of change) Then, the process is repeated from the first interrupt waiting step (S1). And the coefficient continues to increase when there is no change relative to the previous half-cycle size.

The minimum change amount is determined by the power supply size of the conduction angle. In the example of Fig. 7, the signal waveform of T3 has a voltage of 0 at the conduction angle, compared with the normal waveform of T1, T2, and T4. Therefore, the charging amount (or the half period of the signal waveform) in the signal waveform will be smaller than the charging amount of the normal waveform by the power size or the charging amount in the conduction angle portion. Therefore, it is preferable that the minimum change amount, which is the reference charge amount for distinguishing the normal waveform from the signal waveform, is determined as the charge amount of the conduction angle portion when the waveform is normal. However, in consideration of the error, it is more preferable that the charging amount is determined to be slightly smaller than the charging amount of each conduction portion.

Next, if it is larger than the previous size and the increased size is larger than the value stored in the programmable variable (or the minimum change amount), it is determined that the half circle with the conduction angle is missing (S11). Then, a dimming process is performed on the value counted in the counting step S10 (S12). That is, the number of times the conduction angle is consecutive in the continuous half period is determined and the PWM signal is generated by referring to the preset table as shown below, and the PWM signal is transmitted to the known SMPS circuit for dimming (S12).

For example, the setting table is created under the following conditions.

If the counted value is 1, the PWM duty ratio is 99%.

If the counted value is 2, the PWM duty ratio is 90%.

If the counted value is 3, the PWM duty ratio is set to 80%.

...

If the counted value is 10, the PWM duty ratio is set to 10%.

The above example is an example for convenience of explanation of the present invention, and can be changed according to need in designing.

Next, the dimming control signal generating section 22 will be described more specifically with reference to Fig.

As shown in FIG. 9, the microprocessor 48 of the slave control apparatus 100 that has determined the dimming level outputs the PWM waveform. When the external power supply 24 holds the PWM I / F, the PWM waveform is used by the photocoupler 60. (+) Of the PWM I / F of power supply 24 is connected to pin 2 of terminal 64 and to pin 4 of (-). If the external power supply 24 has a 0-10V I / F, connect the power supply pin of the power supply 24 to the first pin of the terminal 64.

Limit the voltage at the 12V regulator (63). This voltage is applied to the low-pass filter 61 by the photocoupler 60 with the PWM duty duty ratio of the microcomputer and converted into DC. The DC voltage is 0-10V and is connected to the third pin of the terminal 64 via a current buffer 62. [

Photocoupler (60) GND on the secondary side is connected to Pin 4 of terminal (64) to separate power.

The invention made by the present inventors has been described concretely with reference to the embodiments. However, it is needless to say that the present invention is not limited to the embodiments, and that various changes can be made without departing from the gist of the present invention.

100: master control device 200: slave control device
10: Switch 12: Triac
13: power supply side control unit 15: first microprocessor
16: user I / F 17: dimming control command section
20: command input unit 21: second microprocessor
22: dimming control signal generator 23: dimming control signal
24: Power supply
30: Second AC power supply 31: Protection circuit
40: full-wave rectifier 41: first resistor
42: DC power supply 43: Comparator
45: second resistor 46: capacitor
47: third resistor 48: transistor
49: comparator
50: zero voltage crossing point 51, 52, 53: interrupt signal

Claims (8)

A dimming control device of a power line-based lighting device for controlling a dimming level of a lamp,
A master control device for generating a roughness control signal including a half-wave form in which a blocking angle is formed from a zero voltage crossing point of the AC power source based on an AC power received from the outside; And
And a control unit for receiving the illumination control signal generated from the master control unit, calculating a consecutive number of half-wave periods included in the received illumination control signal and in which the blocking angle is formed, and calculating, based on the calculated number, And a slave control device for generating a dimming control signal for controlling the dimming control signal. delete The method according to claim 1,
The master control device includes:
A triac to form the blocking angle from the AC power source; And
And a switch connected to the triac or the slave control device. The method according to claim 1,
The slave control device compares the magnitude of the charging voltage with respect to the half period waveform before the zero voltage crossing point of the AC power source and the magnitude of the charging voltage with respect to the half period waveform after the zero voltage crossing point, Wherein the dimming control unit detects the half-wave shape in which the blocking angle is formed. 5. The method of claim 4,
Wherein the slave control device is configured to control the magnitude of the charging voltage for the half-wave form in which the detected blocking angle is formed and the magnitude of the charging voltage for the half-period waveform after the next zero voltage crossing point of the zero voltage crossing point when the half- The magnitude of the charging voltage is compared,
If the magnitude of the charge voltage for the half period waveform after the next zero voltage crossing point of the zero voltage crossing point is within the critical range and the magnitude of the charge voltage for the half cycle waveform with the detected blocking angle, The half period waveform after the voltage crossing point is determined as the half period waveform in which the blocking angle is formed,
If the magnitude of the charging voltage for the half period waveform after the next zero voltage crossing point of the zero voltage crossing point is greater than the magnitude of the charging voltage for the half period waveform with the detected blocking angle and the critical range, The half period waveform after the voltage crossing point is determined as a half period waveform in which no blocking angle is formed,
Wherein when the half-wave waveform after the next zero voltage crossing point is determined to be a half-wave form with a blocking angle, a power line based on which the half-wave waveform after the next zero voltage crossing point is determined to be continuous with the half- A dimming control device of a lighting device. 5. The slave control apparatus according to claim 4,
A full wave rectifier for converting the received illumination control signal into a DC power source;
A comparator that compares the size of the DC power source with a predetermined reference power source and generates an interrupt signal when the size of the DC power source is small;
A capacitor for charging the DC power supply;
A transistor for discharging or charging the capacitor according to an on / off signal; And
And a control unit for controlling the power supply of the half-cycle waveform by summing up the amounts of charge between the interrupts and storing the converted amount of charge when the charged power is discharged for a unit time by transmitting an on / off signal to the transistor, And a microprocessor for determining the size of the power line-based illumination device. The method according to claim 1,
Wherein the master controller measures the power quality of the AC power source and transmits the illumination control signal when the power quality meets a predetermined quality criterion. 8. The method of claim 7,
Wherein the power quality is at least one of a harmonic active power, an instantaneous voltage drop, a current fault, and a total harmonic distortion.

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