JP5642423B2 - LED lighting device and lighting device - Google Patents

Description

  The present invention relates to an LED lighting device and an illuminating device that are applied to main lighting of, for example, an office, a factory, a store, or a general house using LEDs as a light source.

In recent years, LEDs (light emitting diodes) have started to be applied to light sources for illumination from the viewpoint of power saving and long life.
Since the LED is operated by a DC power supply, in order to operate the LED by a commercial AC power supply, the power is taken in only during a partial period of a desired voltage or more during a half cycle of the voltage waveform of the commercial AC power supply. An LED lighting device and a lighting device have been proposed (see, for example, Patent Document 1).
On the other hand, in a lighting circuit that rectifies commercial AC power with a rectifier and supplies it to a plurality of LEDs connected in series, an LED lighting device and a lighting device in which a fluorescent lamp stabilizer is connected between the commercial AC power source and the rectifier are known. (For example, refer to Patent Document 2).
The LED lighting device and the lighting device described in Patent Document 2 described above are supplied with a current when the power source has a voltage equal to or higher than the sum of the VFs (forward voltages) of the LEDs.

International Publication No. 01/045470 Specification JP 2009-238579 A (FIG. 1, claim 1)

The LED lighting device and the lighting device described in Patent Document 1 and the LED lighting device and the lighting device described in Patent Document 2 can be connected to an AC power source with a simple configuration and can light the LED.
However, the LED lighting device and the lighting device described in Patent Document 1 and the LED lighting device and the lighting device described in Patent Document 2 have a current from the commercial AC power source to the LED only during a part of the power cycle. Since the current flows, the rest period in which the input current does not flow from the commercial AC power source becomes long, and the input current waveform also has a high peak value.
Therefore, the LED lighting device and lighting device described in Patent Document 1 described above and the LED lighting device and lighting device described in Patent Document 2 have a low input power factor from a commercial AC power source, and input current waveform distortion. Will become very large.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an LED lighting device and an illumination device that can improve an input power factor and an input current waveform distortion with a simple configuration.

The LED lighting device according to the present invention includes a filter unit that receives an AC voltage from an AC power supply, constitutes a resonance circuit including a coil and a capacitor, and attenuates a harmonic component superimposed on the AC voltage; An AC-DC converter that outputs a pulsating voltage by full-wave rectifying the output voltage of the filter unit, and a part that constantly increases the pulsating voltage output from the AC-DC converter to a predetermined voltage or higher. to be smooth, and a configured portion smoothing unit with a diode and a capacitor, Ru to light the LED at the predetermined voltage or more DC voltage obtained by partial smoothing by the partial smoothing unit.

LED lighting device according to the present invention, as the coil, Ru using glow ballast.

LED lighting device according to the present invention, as the condenser, Ru using the noise preventing capacitor of the glow starter in the glow ballast.

  The lighting device according to the present invention uses an LED lighting device.

  According to the LED lighting device and the lighting device of the present invention, there is an effect that the input power factor and the input current waveform distortion can be improved with a simple configuration.

1 is a circuit configuration diagram of an LED lighting device and a lighting device according to a first embodiment of the present invention. Frequency characteristics of the LED lighting device of FIG. Circuit configuration diagram of LED lighting device and lighting device of second embodiment according to the present invention FIG. 3 is a circuit configuration diagram of a glow ballast applied to the LED lighting device of FIG. FIG. 4 is an external perspective view of a fluorescent lamp luminaire incorporating the glow ballast of FIG. 4 as viewed obliquely from below. Circuit configuration diagram of LED lighting device and lighting device of third embodiment according to the present invention

Hereinafter, LED lighting devices and lighting devices according to a plurality of embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the illuminating device 10 to which the LED lighting device 11 which is 1st Embodiment of this invention is applied is equipped with the LED lighting device 11 and the LED light source 12, and is installed in the ceiling surface of an office, for example. The
The LED lighting device 11 includes a network circuit 13, an AC-DC conversion circuit 14, and a partial smoothing circuit (smoothing unit) 15.
The network circuit 13 is a series circuit of an inductance L that is a coil L1 and a capacitance C that is a capacitor C1. The network circuit 13 is connected to a commercial AC power supply 16.
The AC-DC conversion circuit 14 is a diode bridge including a diode D1, a diode D2, a diode D3, and a diode D4, and is connected in parallel to the capacitor C1 (capacitance C) of the network circuit 13.

The partial smoothing circuit 15 is composed of capacitors C2 and C3, which are passive elements, and diodes D5, D6, and D7, which are active elements, and is connected to the subsequent stage of the AC-DC conversion circuit 14. The partial smoothing circuit 15 is connected to an LED light source 12 composed of LEDs 1 to LEDn.
Here, the partial smoothing circuit 15 can supply a constant direct current to the LED light source 12 even if it is constituted only by a capacitor having a certain capacity (F), but the capacitor C2, the capacitor C3, the diode D5, and the diode D6. By configuring with the diode D7, the peak value can be suppressed by shortening the input current pause period, so that the input power factor and the input current waveform distortion can be improved.

  In the LED lighting device 11, a commercial AC power supply 16 is supplied to the AC-DC conversion circuit 14 through the network circuit 13, and the AC-DC conversion circuit 14 converts the commercial AC power supply 16 into a DC power source that is full-wave rectified. Then, a direct current is applied to the LED light source 12 through the partial smoothing circuit 15. For this reason, the LED light source 12 is always turned on when a certain DC voltage or higher is applied.

  As shown in FIG. 2, the impedance Z (Ω) of the network circuit 13 composed of the coil L1 (inductance L) and the capacitor C1 (capacitance C) has a frequency characteristic having a resonance frequency (kHz) f0 as a peak. Have. For this reason, the input current high-frequency component is attenuated by this frequency characteristic. For example, by setting the constants of the coil L1 (inductance L) and the capacitor C1 (capacitance C) so that the resonance frequency is about three times the radio frequency, the third harmonic component of the input current waveform distortion is set. Harmonic components are attenuated around (for example, 150 Hz component), thereby improving the input power factor and the input current waveform distortion.

Therefore, the LED lighting device 11 of the first embodiment includes a series circuit of a coil L1 (inductance L) to which a commercial AC power supply 16 is input and a capacitor C1 (capacitance C), and is in parallel with the capacitor C1 (capacitance C). A partial smoothing circuit including a capacitor C2, a capacitor C3, a diode D5, a diode D6, and a diode D7 as a smoothing unit that smoothes a rectified direct current. The LED light source 12 is turned on with a smoothed direct current.
Thereby, in the LED lighting device 11 of the first embodiment, the human power factor and the human current waveform distortion can be improved with a simple configuration.

  Moreover, in the illuminating device 10 of this 1st Embodiment, the illuminating device 10 which can improve a human power factor and a human power current waveform distortion with a simple structure can be provided.

(Second Embodiment)
Next, the illuminating device and LED lighting device of 2nd Embodiment of this invention are demonstrated. In the following embodiments, components that are the same as those in the first embodiment described above or functionally similar components are simplified or omitted by giving the same reference numerals or equivalent symbols in the drawings. To do.

As shown in FIGS. 3 and 4, the LED lighting device 31 applied to the lighting device 30 according to the second embodiment of the present invention has a glow ballast (copper iron ballast) 32 as an inductance L in the network circuit 13. A fluorescent lamp lighting device 33 to which is applied. The glow ballast 32 is connected to the commercial AC power supply 16 and the fluorescent lamp LA, and a glow starter G is connected to the secondary side of the fluorescent lamp LA.
In the LED lighting device 31, the AC-DC conversion circuit 14, the partial smoothing circuit 15, and the LED light source 12 are connected in parallel with the capacitor C1 (capacitance C).

As shown in FIG. 5, since the LED lighting device 31 uses the glow ballast 32, the fluorescent lamp 35 is changed to the LED light source 12 in the fluorescent lamp lighting fixture 34 incorporating the glow ballast 32. In some cases. In the fluorescent lamp lighting fixture 34, a glow ballast 32 is built in a fixture main body 36, and a fluorescent lamp 35 is attached to a socket 37 electrically connected to the glow ballast 32.
The LED lighting device 31 can improve the input power factor and human current waveform distortion when the fluorescent lamp 35 is switched to the LED light source 12 in the fluorescent lamp luminaire 34.

  Here, the LED lighting device 31 sets the resonance frequency f0 of the network circuit 13 in the range of 150 Hz ≦ f0 ≦ 240 Hz, so that the resonance frequency f0 is 2. for the commercial AC power supply 16 having a power supply frequency of 60 Hz. The range is 5 times or more and 4.0 times or less. On the other hand, for a commercial AC power supply with a power supply frequency of 50 Hz, the resonance frequency f0 is in the range of 3.0 times or more and 4.8 times or less. Therefore, a good input current waveform can be obtained for both power supply frequencies.

  Therefore, in the lighting device 30 and the LED lighting device 31 according to the second embodiment, the existing fluorescent lamp is used in the LED lighting device 31 operated by the commercial AC power supply 16 by utilizing the glow ballast 32 as the inductance L. The input power factor and the input current waveform distortion can be improved with a simple configuration while being attachable to the lighting fixture 34.

(Third embodiment)
Next, the illuminating device and LED lighting device of 3rd Embodiment of this invention are demonstrated.
As shown in FIG. 6, the LED lighting device 41 applied to the lighting device 40 of the second embodiment of the present invention has a glow ballast 32 applied as an inductance L in the network circuit 13 and a glow starter G. A noise preventing capacitor C4 as a capacitance C is applied to the socket portion to which the is mounted.
In the LED lighting device 41, the AC-DC conversion circuit 14, the partial smoothing circuit 15, and the LED light source 12 are connected in parallel with the noise prevention capacitor C <b> 4 (capacitance C).

  The LED lighting device 41 uses the existing glow ballast 32 as the inductance L and uses the noise prevention capacitor C4 of the glow starter G as the capacitance C. Therefore, when the fluorescent lamp 35 is switched to the LED light source 12 in the fluorescent lamp lighting device 34 equipped with the fluorescent lamp lighting device 33 incorporating the conventional glow ballast 32, the input power factor and the human current waveform distortion are improved. it can.

  Therefore, in the lighting device 40 and the LED lighting device 41 of the third embodiment, by using the noise prevention capacitor C4 of the glow starter G as the capacitance C, the existing fluorescent lamp lighting fixture 34 can be configured with a simple configuration. While being attachable, the input power factor and the input current waveform distortion can be improved with a simple configuration.

  Note that the LED light source, the AC-DC conversion circuit, and the like used in the first embodiment, the second embodiment, and the third embodiment are not limited to those illustrated, and can be appropriately changed.

10, 30, 40 Illumination device 11, 31, 41 LED lighting device 12 LED light source (LED)
14 AC-DC converter (AC-DC converter)
15 Partial smoothing circuit (smoothing part)
16 Commercial AC power supply (AC power supply)
C Capacitance C2, C3 Capacitors (passive elements)
D5, D6, D7 Diode (active element)
L Inductance

Claims (4)

A filter unit that receives an AC voltage from an AC power source, constitutes a resonance circuit including a coil and a capacitor, and attenuates a harmonic component superimposed on the AC voltage;
An AC-DC converter that outputs a pulsating voltage by full-wave rectifying the output voltage of the filter unit;
A partial smoothing unit composed of a diode and a capacitor, which partially smoothes the pulsating voltage output from the AC-DC conversion unit so as to be always equal to or higher than a predetermined voltage;
It said partial smoothing unit LED lighting device of the LED Ru is lit at the predetermined voltage or more DC voltage obtained by partial smoothing by. The LED lighting device according to claim 1,
An LED lighting device using a glow ballast as the coil. The LED lighting device according to claim 2,
An LED lighting device using a glow starter noise prevention capacitor in the glow ballast as the capacitor.   The illuminating device using the LED lighting device of any one of Claim 1 thru | or 3.

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