JP2019061803A - Luminaire - Google Patents

Abstract

To provide a luminaire, mounting of which can be detected with no impact on a capacitor on the output side of the main circuit.SOLUTION: A luminaire 10 has a light source unit 12 and a power supply unit 16. The light source unit 12 has a light source 25 and a detection resistor Rcs. The power supply unit 16 has a main circuit 30, a mounting detection voltage source 37 and a mounting detector 31. The main circuit 30 has a capacitor C3 which is connected in parallel with the light source 25 on the output side, and outputs DC power to the light source 25 through a main path A for applying the DC power to the capacitor C3. The mounting detection voltage source 37 applies the mounting detection voltage to the detection resistor Rcs through a detection path B different from the main path A for applying the DC power to the capacitor C3 of the main circuit 30. The mounting detector 31 detects mounting of the light source unit 12 on the basis of the generation voltage of the detection path B according to the connection of the detection resistor Rcs.SELECTED DRAWING: Figure 1

Description

  Embodiments of the present invention relate to a lighting device provided with a light source unit and a power supply unit.

  BACKGROUND Conventionally, there is a lighting device configured to be detachably combined with a power supply unit having a main circuit that outputs a DC power supply and a light source unit having a light source.

  In such a lighting device, it is not preferable that the main circuit operates to output DC power in a state where the light source unit is not attached to the power supply unit, that is, in a state where the light source is not connected to the main circuit. Therefore, by connecting the mounting detection resistor in parallel with the light source and applying the mounting detection voltage to the output side of the main circuit, the mounting presence or absence of the light source unit is detected according to the connection resistance of the mounting resistor. The main circuit is operated to stop the operation of the main circuit or reduce the output when the main circuit is not attached.

  However, since the main circuit has a capacitor connected in parallel with the light source on the output side, the mounting detection voltage is applied to the capacitor at the time of mounting detection, and the time taken for the mounting detection is the capacitance of the capacitor Are affected by

JP, 2012-28222, A

  The problem to be solved by the present invention is to provide a lighting device capable of detecting mounting without affecting the capacitor on the output side of the main circuit.

  The lighting device of the embodiment includes a light source unit and a power supply unit. The light source unit has a light source and a detection resistor. The power supply unit has a main circuit, a mounting detection voltage source, and a mounting detection unit. The main circuit has a capacitor to which the light source is connected in parallel at the output side, and outputs the DC power source to the light source through the main path that applies the capacitor to the capacitor. The mounting detection voltage source applies the mounting detection voltage to the detection resistor through a detection path different from the main path for applying DC power to the capacitor of the main circuit. The mounting detection unit detects the mounting presence or absence of the light source unit based on the generated voltage of the detection path according to the presence or absence of the connection of the detection resistance.

  According to the present invention, mounting detection can be expected without affecting the output side capacitor of the main circuit.

It is a circuit diagram of the lighting installation which shows a 1st embodiment. It is a perspective view of an illuminating device same as the above. It is a circuit diagram of the lighting installation which shows a 2nd embodiment. It is a circuit diagram of the lighting installation which shows a 3rd embodiment. It is a circuit diagram of the lighting installation which shows a 4th embodiment.

  Hereinafter, a first embodiment will be described with reference to FIGS. 1 and 2.

  The perspective view of the illuminating device 10 is shown in FIG. The lighting device 10 is a long straight ceiling mounted lighting device installed on a ceiling surface. The lighting device 10 includes a main body unit 11 and a light source unit 12.

  The main body unit 11 includes an instrument body 14, a terminal block 15 disposed in the instrument body 14, and a power supply unit 16. The power supply unit 16 is provided with a power supply terminal portion 17 configured by a connector at the end of the wiring drawn from the power supply unit 16.

  The light source unit 12 has a chassis 19 detachably attached to the instrument main body 14 and a light transmitting cover 20 attached to the lower surface side of the chassis 19, and a light source and the like are disposed inside. The light source unit 12 includes a light source terminal portion 21 configured by a connector of a wire drawn from the light source unit 12. The light source terminal unit 21 is detachably connected to the power supply terminal unit 17.

  Then, the power supply terminal portion 17 and the light source terminal portion 21 are connected, and the light source unit 12 is attached to the main body unit 11, whereby the lighting device 10 is assembled.

  Next, the circuit diagram of the illuminating device 10 is shown in FIG.

  In the light source unit 12, the light source 25 and the detection resistor Rcs are connected in series between the positive side power supply terminal 21 a and the negative side power supply terminal 21 b of the light source terminal 21, and the light source 25 is connected to the signal terminal 21 c of the light source terminal 21. And a connection point of the detection resistor Rcs are connected. The light source 25 uses a plurality of LEDs 26 as light emitting elements. The detection resistance Rcs is set to output a DC power supply having a necessary current value from the power supply unit 16 in accordance with the characteristics of the light source 25.

  The power supply unit 16 further includes a main circuit 30 that outputs a DC power to the light source 25, a mounting detection unit 31, and a control unit 32.

  The main circuit 30 is a Single Ended Primary Inductance Converter (SEPIC) circuit, and includes a 1 converter type power conversion circuit having the function of a power factor correction circuit and the function of a DC / DC converter circuit.

  In the main circuit 30, a pair of input ends of the rectifier circuit 35 are connected to an AC power supply e which is an external power supply. The rectifier circuit 35 rectifies the alternating current power supply e into a direct current power supply and outputs it. A capacitor C1 that smoothes a DC power supply is connected to a pair of output terminals of the rectifier circuit 35.

  A series circuit of an inductor L1 and a switching element Q1 such as a field effect transistor is connected across the capacitor C1. A series circuit of a capacitor C2 and an inductor L2 is connected across the switching element Q1. A diode D1 for backflow prevention and a capacitor C3 such as an electrolytic capacitor are connected across the inductor L2. The capacitor C3 is connected between the positive side power supply terminal 17a of the power supply terminal portion 17 and the negative side power supply terminal 17b. That is, the capacitor C3 is connected in parallel with the light source 25 on the output side of the main circuit 30. As the capacitor C3, a capacitor having a large capacity of, for example, about 200 μF is used to remove the ripple component of the DC power supply.

  Then, the main circuit 30 applies DC power to the light source 25 through the main path A that applies DC power to the capacitor C3.

  Further, the signal terminal 17 c of the power supply terminal unit 17 is connected to the control unit 32. A detection voltage is input to the control unit 32 through the detection resistor Rcs connected in series to the light source 25.

  Further, in the mounting detection unit 31, the cathode of the diode D2 is connected to the signal terminal 17c, the voltage dividing resistors R2 and R3 are connected to the anode of the diode D2, and a connection point between the anode of the diode D2 and the voltage dividing resistor R2 is provided. A mounting detection voltage source 37, which is a constant voltage source for applying a detection voltage of, for example, about 12 V, is connected via the resistor R4 and the switch 36, and a connection point of the voltage dividing resistors R2 and R3 is connected to the control unit 32. The ground of the mounting detection unit 31 is the same as the ground of the main circuit 30.

  Then, the mounting detection unit 31 applies the mounting detection voltage to the detection resistor Rcs through the detection path B different from the main path A for applying DC power to the capacitor C3 of the main circuit 30, and detects the mounting / non-mounting of the light source unit 12. I do.

  Also, the control unit 32 is configured of, for example, a control IC. The control unit 32 performs feedback control of the switching operation of the switching element Q1 of the main circuit 30 based on the detection voltage detected through the detection resistor Rcs connected in series to the light source 25. Further, the control unit 32 causes the attachment detection unit 31 to detect attachment / detachment of the light source unit 12 at startup or the like, and causes the main circuit 30 to output DC power upon detection of attachment of the light source unit 12. At the time of detection of attachment / detachment of the light source unit 12, control is performed so that the main circuit 30 is not operated.

  Furthermore, the control unit 32 has a function of protection means for stopping the operation of the main circuit 30 when detecting the overvoltage and the overcurrent. Then, the control unit 32 validates the mounting detection function at the timing when the protection function operates, applies the mounting detection voltage to the detection resistor Rcs through the detection path B, and detects the mounting presence or absence of the light source unit 12. Thereby, the control unit 32 cancels the stop of the main circuit 30, determines whether the re-operation of the main circuit 30 is possible, and re-operates the main circuit 30 if possible.

  Next, the operation of the first embodiment will be described.

  Attach the main unit 11 to the installation surface such as a ceiling, connect the light source terminal 21 of the light source unit 12 to the power terminal 17 of the power supply unit 16, mount the light source unit 12 on the main unit 11, and install the lighting device 10. .

  Then, when the external power is supplied to the power supply unit 16 and the control unit 32 is activated, the control unit 32 detects whether or not the light source unit 12 is attached by the attachment detection unit 31 before activating the main circuit 30.

  The control unit 32 closes the switch 36 and applies the mounting detection voltage from the mounting detection voltage source 37 to the detection path B different from the main path A for applying DC power to the capacitor C3 of the main circuit 30. At this time, the mounting detection voltage is not applied to the capacitor C3 of the main circuit 30.

  When the light source unit 12 is not attached, since the signal terminal 17c of the detection path B is open, the detection voltage input to the control unit 32 from the connection point of the voltage dividing resistors R2 and R3 is higher than the predetermined reference voltage. Also, it is detected that the light source unit 12 is not attached.

  On the other hand, when the light source unit 12 is attached, the attachment detection voltage flows to the detection resistor Rcs through the detection path B, so the detection voltage input to the control unit 32 from the connection point of the voltage dividing resistors R2 and R3 is predetermined. The voltage of the light source unit 12 is detected to be lower than the reference voltage of the light source unit 12.

  The control unit 32 does not operate the main circuit 30, that is, does not perform the switching operation of the switching element Q1 when it is detected that the light source unit 12 is not attached.

  On the other hand, when detecting that the light source unit 12 is mounted, the control unit 32 operates the main circuit 30, that is, switches the switching element Q1 and applies a DC power to the capacitor C3 of the main circuit 30. A DC power supply is output to the light source 25 to turn on the light source 25.

  Further, when the main circuit 30 is operated, the control unit 32 opens the switch 36 of the mounting detection unit 31 and stops the application of the mounting detection voltage to the detection path B. Thereby, the control unit 32 performs feedback control of the switching operation of the switching element Q1 of the main circuit 30 based on the detection voltage detected through the detection resistor Rcs connected in series to the light source 25, and makes the light source 25 constant current Control.

  As described above, in the lighting device 10 according to the first embodiment, the presence or absence of the light source unit 12 can be detected without affecting the capacitor C2 on the output side of the main circuit 30.

  The light source 25 and the detection resistor Rcs are connected in series, and feedback control of the output of the DC power supply from the main circuit 30 is performed based on the detection voltage detected through the detection path B connected between the light source 25 and the detection resistor Rcs. However, the detection resistance Rcs and the detection path B for this feedback control can be shared to detect the mounting of the light source unit 12, and the circuit configuration can be simplified.

  Moreover, the attachment detection voltage source 37 is connected to the detection path B when the power supply unit 16 is activated, and the attachment detection voltage source 37 is disconnected from the detection path B at times other than the activation time. Can be prevented.

  Further, since the ground of the main circuit 30 and the ground of the mounting detection unit 31 are the same, the circuit configuration can be simplified.

  Further, the control unit 32 stops the operation of the main circuit 30 at the time of detection of the overvoltage and the overcurrent, but enables the attachment detection function at the timing when the protection function operates, and attaches the detection voltage to the detection resistor Rcs through the detection path B. The voltage is applied to detect whether the light source unit 12 is attached or not. Therefore, the control unit 32 cancels the stop of the main circuit 30, determines whether the re-operation of the main circuit 30 is possible, and can re-operate the main circuit 30 if possible.

  Next, FIG. 3 shows a second embodiment.

  The light source unit 12 has the same configuration as that of the first embodiment.

  The main circuit 30 of the power supply unit 16 includes a flyback DC / DC converter circuit. The main circuit 30 includes a rectifier circuit 35 and a capacitor C1. A series circuit of a primary winding Tr1 of the transformer Tr and a switching element Q11 such as a field effect transistor is connected to both ends of the capacitor C1. A diode D11 for backflow prevention and a capacitor C13 such as an electrolytic capacitor are connected to both ends of the secondary winding Tr2 of the transformer Tr. The capacitor C13 is connected between the positive side power supply terminal 17a of the power supply terminal portion 17 and the negative side power supply terminal 17b. That is, the capacitor C13 is connected in parallel with the light source 25 on the output side of the main circuit 30. As the capacitor C13, for example, one having a large capacity of about 200 μF is used to remove the ripple component of the DC power supply.

  Then, the main circuit 30 applies DC power to the light source 25 through the main path A that applies DC power to the capacitor C13.

  Further, the control unit 32 performs feedback control of the switching operation of the switching element Q11 of the main circuit 30 based on the detection voltage detected through the detection resistor Rcs connected in series to the light source 25.

  The attachment detection unit 31 has the same configuration as that of the first embodiment. The mounting detection unit 31 applies the mounting detection voltage to the detection resistor Rcs through the detection path B different from the main path A for applying DC power to the capacitor C13 of the main circuit 30, and detects the mounting / non-mounting of the light source unit 12. . The ground of the mounting detection unit 31 is the same as the ground of the main circuit 30.

  Also in the case of the main circuit 30 including the flyback type DC / DC converter circuit, the same function and effect as those of the first embodiment described above can be obtained.

  Next, FIG. 4 shows a third embodiment.

  The light source unit 12 has the same configuration as that of the first embodiment.

  The main circuit 30 of the power supply unit 16 is a rectifier circuit 35 that rectifies and smoothes the AC power supply e, a power factor improvement circuit 40 that is a boost chopper circuit that boosts the rectified and smoothed DC power source to improve the power factor, and A chopper circuit 41 is provided.

  The step-down chopper circuit 41 is a series circuit including a switching element Q21 and a diode D21 connected between the output terminals of the power factor correction circuit 40, and an inductor L21 having one end connected to a connection point between the switching element Q21 and the cathode of the diode D21. The capacitor C23 is connected to the other end of the inductor L21. The capacitor C23 is connected between the positive side power supply terminal 17a of the power supply terminal portion 17 and the negative side power supply terminal 17b. That is, the capacitor C23 is connected in parallel to the light source 25 on the output side of the main circuit 30.

  Then, the main circuit 30 applies DC power to the light source 25 through the main path A that applies DC power to the capacitor C23.

  Furthermore, the control unit 32 performs feedback control of the switching operation of the switching element Q21 of the main circuit 30 based on the detection voltage detected through the detection resistor Rcs connected in series to the light source 25.

  The attachment detection unit 31 has the same configuration as that of the first embodiment. The mounting detection unit 31 applies the mounting detection voltage to the detection resistor Rcs through the detection path B different from the main path A for applying DC power to the capacitor C23 of the main circuit 30, and detects the mounting / non-mounting of the light source unit 12. .

  Also in the case of the main circuit 30 including the step-down chopper circuit 41 and the like, the same function and effect as those of the above-described first embodiment can be obtained.

  Next, FIG. 5 shows a fourth embodiment.

  The light source unit 12 is provided with the light source 25 and the detection resistor Rcs independently. The light source terminal unit 21 includes a pair of power supply terminals 21a and 21b to which the light source 25 is connected, and a pair of signal terminals 21c and 21d to which the detection resistor Rcs is connected.

  The power supply unit 16 uses the main circuit 30 of any of the first to third embodiments. At the output side of the main circuit 30, a capacitor C33 (one of C3, C13, and C23) connected in parallel with the light source 25 is disposed.

  The power supply terminal unit 17 includes a pair of power supply terminals 17a and 17b to which the output side of the main circuit 30 is connected, and a pair of signal terminals 17c and 17d to which the mounting detection unit 31 is connected.

  Then, the main circuit 30 applies DC power to the light source 25 through the main path A that applies DC power to the capacitor C33.

  Further, the mounting detection unit 31 detects the mounting on the detection resistor Rcs through the detection path B which is different from the main path A for applying DC power to the capacitor C33 of the main circuit 30 and is independent of the main path A. A voltage is applied to detect whether or not the light source unit 12 is attached.

  Also in the fourth embodiment, the same function and effect as those of the first embodiment described above can be obtained. In addition, since the mounting detection voltage is applied to the detection resistor Rcs through the detection path B independent of the main path A to detect the mounting of the light source unit 12, it is possible to always detect the mounting of the light source unit 12.

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

10 Lighting system
12 light source unit
16 power supply unit
25 light sources
30 main circuit
31 Attachment detector
37 Attachment detection voltage source A Main path B Detection path
C3, C13, C23, C33 capacitors
Rcs detection resistance

Claims (5)

A light source unit having a light source and a detection resistor;
A main circuit having a capacitor to which the light source is connected in parallel on the output side, and outputting a DC power source to the light source through a main path for applying a DC power source to the capacitor; A mounting detection voltage source for applying a mounting detection voltage to the detection resistance through a detection path different from the path, and detection of mounting / non-mounting of the light source unit based on the generated voltage of the detection path according to the connection of the detection resistance A power supply unit having a mounting detection unit;
A lighting device comprising: In the light source unit, the light source and the detection resistor are connected in series,
The power supply unit controls an output of a DC power supply from the main circuit based on a detection voltage detected through the detection path connected between the light source and the detection resistor. Lighting device as described. The illumination according to claim 1 or 2, wherein the power supply unit connects the mounting detection voltage source to the detection path when starting up, and disconnects the mounting detection voltage source from the detection path when starting up. apparatus. The lighting apparatus according to any one of claims 1 to 3, wherein in the power supply unit, a ground of the main circuit and a ground of the mounting detection unit are the same. The lighting device according to claim 1, wherein the light source unit is provided with the light source and the detection resistor independently.

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