JP2021118587A - Power supply device, lighting device, and lighting equipment - Google Patents

Abstract

To suppress noise caused by vibration of a choke coil.SOLUTION: A power supply device 1 includes: a pair of power supply terminals 10; a conversion circuit 11 for converting an AC voltage input from the pair of power supply terminals 10 into a DC voltage; and a filter circuit 12 that is provided between the pair of power supply terminals 10 and the conversion circuit 11. The filter circuit 12 has a plurality of choke coils (a first choke coil L1 and a second choke coil L2). Each of the plurality of choke coils is inserted into a path of current flowing from the pair of power supply terminals 10 to the conversion circuit 11. The plurality of choke coils are configured to weaken magnetic flux generated when a current flows.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to power supplies, luminaires and luminaires. More specifically, the present disclosure relates to a power supply having a filter circuit, a luminaire having the power supply and a light source which is a load, and a luminaire having the luminaire.

As a conventional example of the power supply device, the halogen lamp lighting device described in Patent Document 1 will be illustrated. The halogen lamp lighting device described in Patent Document 1 includes a noise removing device, a rectifier circuit, and an inverter circuit. The noise removing device includes an across capacitor, a normal mode choke, and a common mode choke. The ACROSS capacitor connects a pair of voltage input terminals. The normal mode choke connects one end to one of the voltage input terminals. The common mode choke has a first inductor and a second inductor that are magnetically coupled to each other. The first inductor connects the other end of the normal mode choke to the voltage output terminal. The second inductor connects a pair of voltage input terminals.

The noise removing device prevents high-frequency noise from entering the inside of the halogen lamp lighting device through the power supply line from the commercial power source, and also prevents high-frequency noise generated by the halogen lamp lighting device from entering the outside through the power supply line.

In the halogen lamp lighting device described in Patent Document 1, an AC voltage whose phase is controlled by a phase control dimming device is input.

Japanese Unexamined Patent Publication No. 2008-210597

By the way, when a phase-controlled AC voltage is input to a halogen lamp lighting device (power supply device), a sudden current flows through the normal mode choke coil of the noise removing device. As a result, the normal mode choke coil may vibrate and generate abnormal noise (noise).

An object of the present disclosure is to provide a power supply device, a lighting device, and a lighting fixture capable of suppressing noise caused by vibration of a choke coil.

The power supply device according to one aspect of the present disclosure is provided between a pair of power supply terminals, a conversion circuit that converts an AC voltage input from the pair of power supply terminals into a DC voltage, and between the pair of power supply terminals and the conversion circuit. It is equipped with a filter circuit. The filter circuit has a plurality of choke coils. Each of the plurality of choke coils is inserted into the path of the current flowing from the pair of power supply terminals to the conversion circuit. The plurality of choke coils are configured so that the magnetic fluxes generated when the current flows are opposite to each other.

The lighting device according to one aspect of the present disclosure includes the power supply device and a light source that is lit by DC power supplied from the power supply device.

The luminaire according to one aspect of the present disclosure includes the luminaire and at least the luminaire body that supports the light source.

The power supply device, the lighting device, and the lighting equipment of the present disclosure have an effect that noise caused by vibration of the choke coil can be suppressed.

FIG. 1 is a circuit configuration diagram of a power supply device and a lighting device according to an embodiment of the present disclosure. FIG. 2 is a front view in which a part of the printed wiring board of the power supply device in the above is omitted. FIG. 3 is a perspective view of the luminaire according to the embodiment of the present disclosure. FIG. 4A is a graph showing a noise measurement result in a comparative example of the same power supply device. FIG. 4B is a graph showing the measurement result of noise in the power supply device of the same as above. FIG. 5 is a partially omitted circuit configuration diagram showing a modification 1 of the power supply device of the above. FIG. 6 is a partially omitted circuit configuration diagram showing a modification 2 of the power supply device of the above. FIG. 7 is a partially omitted circuit configuration diagram showing a modification 3 of the power supply device of the above.

The power supply device, the lighting device, and the lighting fixture according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiment is a schematic view, and the ratio of the size and the thickness of each component does not necessarily reflect the actual dimensional ratio. The configuration described in the following embodiments is only an example of the present disclosure. The present disclosure is not limited to the following embodiments, and various changes can be made depending on the design and the like as long as the effects of the present disclosure can be achieved.

(1. Configuration of the lighting device according to the embodiment)
As shown in FIG. 1, the lighting device 3 (hereinafter, abbreviated as lighting device 3) according to the embodiment includes an LED (Light Emitting Diode) 2 as a light source and a power supply device that supplies DC power to light the LED 2. 1 (power supply device 1 according to the embodiment) is provided.

The LED 2 is, for example, a chip-on-board type white LED for lighting. However, the LED 2 may be a package type white LED for lighting. Further, the lighting device 3 may include a plurality of LEDs 2. It is preferable that the plurality of LEDs 2 are electrically connected in series or electrically connected in series and parallel. The light source may be a solid light source other than LED2, for example, an organic electroluminescence element or the like.

(2. Configuration of power supply device according to the embodiment)
As shown in FIG. 1, the power supply device 1 (hereinafter, abbreviated as power supply device 1) according to the embodiment includes a pair of power supply terminals 10, a conversion circuit 11, a filter circuit 12, a rectifier circuit 13, and a control circuit. It includes 15 and a pair of output terminals.

The pair of power supply terminals 10 includes a first power supply terminal 10A and a second power supply terminal 10B. The first power supply terminal 10A is electrically connected to the positive electrode of the AC power supply 8 via the dimmer 9. The second power supply terminal 10B is electrically connected to the negative electrode of the AC power supply 8.

The dimmer 9 phase-controls the AC voltage supplied from the AC power supply 8 to the power supply device 1 by using, for example, a bidirectional three-terminal thyristor (also called a triac). The dimmer 9 has, for example, a rotary operation handle, and phase-controls the AC voltage at a phase angle corresponding to the rotation angle of the operation handle from a reference position. Alternatively, the dimmer 9 may have a sliding operation handle, and the AC voltage may be phase-controlled at a phase angle according to the moving distance of the operation handle from the reference position. The rotation angle (for example, an arbitrary angle from 0 ° to 300 °) or the moving distance of the operation handle is associated with the dimming level of the LED 2 on a one-to-one basis. The dimming level represents the ratio of the current flowing through the LED 2 when the amount of light flowing through the LED 2 is 100%.

The pair of output terminals includes a first output terminal 14A and a second output terminal 14B. The first output terminal 14A is electrically connected to the anode of the LED 2. The second output terminal 14B is electrically connected to the cathode of the LED 2.

The filter circuit 12 has one capacitor C1 and two choke coils (first choke coil L1 and second choke coil L2). The capacitor C1 is also called an X capacitor. The capacitor C1 can suppress noise in the normal mode (differential mode) by bypassing the first power supply terminal 10A and the second power supply terminal 10B. The first end (winding start) of the first choke coil L1 is electrically connected to the first power supply terminal 10A, and the second end (winding end) of the first choke coil L1 and the second choke coil L2 The second end (end of winding) is electrically connected. That is, the first choke coil L1 and the second choke coil L2 are electrically connected in series with the first power supply terminal 10A. These two choke coils can suppress noise in the normal mode.

The rectifier circuit 13 includes a diode bridge. The AC input terminal of the positive electrode of the rectifier circuit 13 is electrically connected to the first end (start of winding) of the second choke coil L2. The AC input terminal of the negative electrode of the rectifier circuit 13 is electrically connected to the second power supply terminal 10B. The pair of pulsating output terminals of the rectifier circuit 13 are electrically connected in parallel with the capacitor C2.

The conversion circuit 11 has a switching converter circuit such as a flyback converter circuit. The conversion circuit 11 is electrically connected to the capacitor C2 in parallel with the pair of pulsating output terminals of the rectifier circuit 13, and converts the pulsating voltage rectified by the rectifier circuit 13 into a DC voltage. The conversion circuit 11 applies a DC voltage to the LED 2 via the first output terminal 14A and the second output terminal 14B, and passes a current (forward current) to the LED 2 to light the LED 2. However, the conversion circuit 11 may be a switching converter circuit other than the flyback converter circuit.

The control circuit 15 switches the semiconductor switching element included in the conversion circuit 11 (switching converter circuit). The control circuit 15 controls the semiconductor switching element by PWM (Pulse Width Modulation) to match the output current of the conversion circuit 11 (forward current flowing through the LED 2) with the target value. Further, the control circuit 15 measures the conduction angle of the AC voltage whose phase is controlled by the dimmer 9, and dims the LED 2 by changing the target value of the output current according to the measured conduction angle.

By the way, the power supply device 1 includes a printed wiring board 16 on which a power supply terminal 10, a conversion circuit 11, a filter circuit 12, a rectifier circuit 13, a pair of output terminals, and a control circuit 15 are mounted (see FIG. 2).

The printed wiring board 16 is formed in a rectangular flat plate shape. An insertion component including a first choke coil L1 and a second choke coil L2 is mounted on the surface (component surface 160) of the printed wiring board 16. On the other hand, the printed wiring is formed on the back surface (solder surface) of the printed wiring board 16. Surface mount components such as a control circuit 15 and a semiconductor switching element are mounted on the solder surface of the printed wiring board 16.

On the component surface 160 of the printed wiring board 16, a power supply terminal 10, a first choke coil L1 and a second choke coil L2 are mounted on the end portion of the printed wiring board 16 in the longitudinal direction (see FIG. 2). The power supply terminal 10 is composed of a quick-connect type terminal block.

The first choke coil L1 and the second choke coil L2 are so-called radial lead type drum type inductors, respectively. In the radial lead type drum type inductor, the winding is wound around the drum type magnetic core and covered with a cylindrical cover, and two leads protrude from a portion corresponding to the bottom surface of the cylinder. Further, since the first choke coil L1 and the second choke coil L2 are each non-shield type (open magnetic circuit type), leakage flux is generated. It is preferable that the first choke coil L1 and the second choke coil L2 are inductors of the same manufacturer and have the same product number and the same characteristics, respectively, and have the same inductance value, outer diameter, and height.

In each of the first choke coil L1 and the second choke coil L2, the axial direction of the drum-shaped magnetic core is substantially aligned with the normal direction of the component surface 160 of the printed wiring board 16 (the direction perpendicular to the paper surface in FIG. 2). It is mounted on the component surface 160. However, the first choke coil L1 and the second choke coil L2 are mounted on the component surface 160 of the printed wiring board 16 by a distance shorter than their respective outer diameters (see FIG. 2).

The power supply device 1 includes a housing 17 that houses the printed wiring board 16 (see FIG. 3). The housing 17 is formed in a rectangular parallelepiped shape by a plate material of a ferromagnetic metal (for example, stainless steel and zinc steel). Then, the printed wiring board 16 is housed inside the housing 17. The electric cable 18 is pulled out from the side surface of one end of the housing 17 in the longitudinal direction. The two electric wires constituting the electric cable 18 are electrically connected to the first output terminal 14A and the second output terminal 14B of the power supply device 1, one by one.

(3. Configuration of lighting equipment according to the embodiment)
As shown in FIG. 3, the lighting fixture 4 (hereinafter, abbreviated as lighting fixture 4) according to the embodiment includes a fixture main body 40, a power supply device 1, a translucent cover 41, a frame 42, and a pair of mounting springs 43. There is.

The instrument main body 40 has a cylindrical main body portion 400 and a conical trapezoidal reflector 401. The LED 2 is housed in the main body 400. The light radiated from the LED 2 is emitted from the open lower surface of the main body 400 to the outside of the main body 400. However, the lower surface of the main body 400 is covered with the translucent cover 41. The translucent cover 41 is made of a translucent material such as acrylic resin and is formed in a cylindrical shape. The light-transmitting cover 41 preferably has light diffusivity. Then, the light emitted from the LED 2 is diffused by the translucent cover 41 and radiates into the illumination space.

The frame 42 is made of a metal material such as a zinc steel plate in an annular shape. The frame 42 is integrally attached to the tip (lower end) of the reflector 401.

Each of the pair of mounting springs 43 is formed in a curved strip shape by, for example, a stainless steel plate. One end of each mounting spring 43 in the longitudinal direction is fixed to the side surface of the instrument body 40.

The luminaire 4 is installed so as to be embedded in the ceiling indoors. That is, the fixture main body 40 and the pair of mounting springs 43 are inserted into the circular embedded holes provided in the ceiling, and the fixture main body 40 is placed on the ceiling by sandwiching the ceiling (ceiling material) between the pair of mounting springs 43 and the frame 42. It is attached. The power supply device 1 is arranged behind the ceiling through an embedding hole.

(4. Features of power supply)
By the way, it is considered that the noise of the choke coil (inductor) described in the prior art is generated by the vibration of the choke coil in the human audible frequency range (range of about 20 Hz to 20 kHz). The factors that cause the open magnetic circuit type choke coil to vibrate are the magnetostrictive action of the magnetic core and the vibration of the winding due to the leakage flux. Further, as a factor that the acoustic noise due to the vibration of the choke coil is amplified, there is an action on the surrounding magnetic material due to contact with other parts and leakage flux. For example, a printed wiring board on which a choke coil is mounted vibrates due to the vibration of the choke coil, or a leakage flux acts on a metal housing that houses the printed wiring board, causing the housing to vibrate, resulting in acoustic noise. May be amplified.

Further, in the power supply device 1 (and the lighting device 3), when the AC voltage supplied from the AC power supply 8 is phase-controlled by the dimmer 9, the frequency is abruptly twice the frequency of the AC voltage (50 Hz or 60 Hz). Voltage change occurs. Therefore, there is a high possibility that the choke coil constituting the filter circuit 12 vibrates at a frequency of 100 Hz or 120 Hz and their harmonics to generate acoustic noise.

Therefore, in order to suppress the acoustic noise of the power supply device 1 caused by the squealing of the choke coil, it is effective to suppress the vibration of the choke coil itself. Therefore, the power supply device 1 according to the embodiment has a plurality of choke coils (first choke coil L1 and second choke coil L2) constituting the filter circuit 12, and the magnetic fluxes generated in the plurality of choke coils are mutually generated. It is configured to weaken each other.

That is, in the power supply device 1, the first choke coil L1 and the second choke coil L2 are electrically connected in series so as to have opposite polarities. Therefore, the magnetic fluxes of the first choke coil L1 and the second choke coil L2 are opposite to each other. As a result, the power supply device 1 suppresses the vibration of a plurality of choke coils (first choke coil L1 and second choke coil L2) as compared with the case where the filter circuit has only one choke coil. , Acoustic noise (noise) can be suppressed. Further, in the power supply device 1, since the magnetic fluxes of the first choke coil L1 and the second choke coil L2 are weakened by each other, the leakage flux passing through the housing 17 accommodating the printed wiring board 16 is reduced. can do. As a result, the power supply device 1 can suppress noise caused by vibration of the housing 17.

Here, on the component surface 160 of the printed wiring board 16, the first choke coil L1 and the second choke coil L2 are mounted closer to each other by a distance shorter than the outer diameter of each choke coil (see FIG. 2). .. That is, as the distance between the first choke coil L1 and the second choke coil L2 is brought closer, the magnetic flux passing through the respective magnetic cores and windings is reduced, and the vibrations of the first choke coil L1 and the second choke coil L2 are reduced. Can be suppressed. However, if the first choke coil L1 and the second choke coil L2 are brought into contact with each other, the vibrations of each other may be amplified. Therefore, the first choke coil L1 and the second choke coil L2 are brought into contact with each other. That must be avoided.

(5. Test result of embodiment)
Next, the test results of a test in which the noise of each of the power supply device 1 (lighting device 3) and the power supply device of the comparative example according to the embodiment are measured will be described. The power supply device of the comparative example is different from the power supply device 1 according to the embodiment in that the filter circuit is composed of one capacitor C1 and one choke coil. Incidentally, in the power supply device 1 according to the embodiment, the first choke coil L1 and the second choke coil L2 are composed of an inductor having a diameter of 8 mm and an inductance value of 1.0 mH. On the other hand, in the power supply device of the comparative example, the choke coil is composed of an inductor having a diameter of 10 mm and an inductance value of 3.3 mH.

Regarding the power supply device 1 and the power supply device of the comparative example according to the embodiment, the firing angle (also referred to as a phase angle) of the bidirectional three-terminal thyristor in phase control is controlled to π / 2 (phase at which the AC voltage reaches the peak value). A test was conducted to measure the sound pressure spectrum level (unit: [dB]) of noise when the AC voltage was input. In addition, the sound pressure spectrum level of the noise (background noise) in the state where the power supply device 1 according to the embodiment and the power supply device of the comparative example are stopped was also measured.

The polygonal line α2 in FIG. 4A shows the measurement result (sound pressure spectrum level) of the power supply device of the comparative example, and the polygonal line α1 in FIG. 4B shows the measurement result (sound pressure spectrum level) of the power supply device 1 according to the embodiment. There is. The polygonal line β1 in FIGS. 4A and 4B shows the measurement result (sound pressure spectrum level) of background noise. Further, the reference numeral AV2 in FIG. 4A indicates the A characteristic sound pressure level of the power supply device of the comparative example, and the reference numeral AV1 in FIG. 4B indicates the A characteristic sound pressure level of the power supply device 1 according to the embodiment. The "A-weighted sound pressure level" is the sum (unit: [dB (A)]) after the sound pressure spectrum level of each frequency is corrected by the A-weighting.

As is clear from the measurement results shown in FIGS. 4A and 4B, the noise (acoustic noise) of the power supply device 1 according to the embodiment is 7 to 8 dB (A) as compared with the noise (acoustic noise) of the power supply device of the comparative example. ) Is decreasing (AV1 = 11.8 dB (A), AV2 = 19.3 dB (A)).

(6. Modification example of power supply device)
Next, some modifications of the power supply device 1 according to the embodiment will be briefly described with reference to the drawings. The power supply device 1 of each modification described below is characterized by the configuration of the filter circuit 12, and the configurations other than the filter circuit 12 are the same as those of the power supply device 1 according to the embodiment. Therefore, illustration and description of the configuration common to the power supply device 1 according to the embodiment will be omitted as appropriate.

(6-1. Configuration of power supply device of modification 1)
As shown in FIG. 5, the filter circuit 12 in the power supply device 1 of the first modification has a different connection position of the second choke coil L2. That is, the first end (winding start) of the second choke coil L2 is electrically connected to the second power supply terminal 10B, and the second end (winding end) of the second choke coil L2 is the negative electrode of the rectifier circuit 13. It is electrically connected to the AC input terminal of. Further, the second end (winding end) of the first choke coil L1 is electrically connected to the AC input terminal of the positive electrode of the rectifier circuit 13. That is, the first choke coil L1 is inserted into the path of the current flowing from the first power supply terminal 10A to the conversion circuit 11, and the second choke coil L2 is the current flowing from the conversion circuit 11 to the second power supply terminal 10B. It is inserted in the path of.

Also in the power supply device 1 of the first modification, the first choke coil L1 and the second choke coil L2 are electrically connected in series so as to have opposite polarities. Therefore, the power supply device 1 of the modified example 1 also weakens the magnetic fluxes of each other between the first choke coil L1 and the second choke coil L2, and causes acoustic noise (noise), similarly to the power supply device 1 according to the embodiment. It can be suppressed. Further, the filter circuit 12 inserts the first choke coil L1 and the second choke coil L2 into the power supply lines for going and returning one by one, so that not only the normal mode noise but also the common mode noise is dealt with. It has the advantage of producing a filter effect.

(6-2. Configuration of power supply device of modification 2)
As shown in FIG. 6, the filter circuit 12 in the power supply device 1 of the second modification has a different connection position of the second choke coil L2. That is, the first end (winding start) of the second choke coil L2 is electrically connected to the second end (winding end) of the first choke coil L1 and the second end (winding) of the second choke coil L2. The end) is electrically connected to the first end (winding start) of the first choke coil L1. That is, the first choke coil L1 and the second choke coil L2 are electrically connected in parallel.

Also in the power supply device 1 of the second modification, the first choke coil L1 and the second choke coil L2 are electrically connected so as to have opposite polarities. Therefore, the power supply device 1 of the second modification also weakens the magnetic fluxes of each other between the first choke coil L1 and the second choke coil L2, and causes acoustic noise (noise), similarly to the power supply device 1 according to the embodiment. It can be suppressed. Further, in the power supply device 1 of the modified example 2, the current flowing through the first choke coil L1 and the second choke coil L2 is reduced by half as compared with the power supply device 1 of the embodiment and the modified example 1. Therefore, the power supply device 1 of the modification 2 is suitable for applications that require a larger current to flow than the power supply device 1 of the embodiment and the modification 1.

(6-3. Configuration of power supply device of modification 3)
As shown in FIG. 7, the filter circuit 12 in the power supply device 1 of the third modification has different connection positions of the first choke coil L1 and the second choke coil L2. That is, the first end (winding start) of the first choke coil L1 is electrically connected to the pulsating output terminal of the positive electrode of the rectifier circuit 13, and the second end (winding end) of the first choke coil L1 is the first. It is electrically connected to the second end (end of winding) of the choke coil L2 of 2. The first end (start of winding) of the second choke coil L2 is electrically connected to one end on the high potential side of the capacitor C2. That is, the first choke coil L1 and the second choke coil L2 are inserted into the path of the current flowing from the rectifier circuit 13 to the conversion circuit 11.

Also in the power supply device 1 of the third modification, the first choke coil L1 and the second choke coil L2 are electrically connected in series so as to have opposite polarities. Therefore, the power supply device 1 of the modified example 3 also weakens the magnetic fluxes of each other between the first choke coil L1 and the second choke coil L2, and causes acoustic noise (noise), similarly to the power supply device 1 according to the embodiment. It can be suppressed. Further, since the current flowing through the first choke coil L1 and the second choke coil L2 is rectified by the rectifier circuit 13, the peak-to-peak value is about half of the current before rectification. become. Therefore, the power supply device 1 of the modification 3 can further reduce the acoustic noise. Further, the power supply device 1 of the modification 3 can reduce the hysteresis loss in the magnetic cores (drum type magnetic cores) of the first choke coil L1 and the second choke coil L2.

Although the power supply device 1 according to the embodiment and the power supply device 1 of the modified example 1-3 use the light source (LED2) as a load, power may be supplied to a load other than the light source. Further, the number of choke coils constituting the filter circuit 12 is not limited to two. That is, the filter circuit 12 may have three or more choke coils.

(7. Summary)
The power supply device (1) according to the first aspect of the present disclosure includes a pair of power supply terminals (10) and a conversion circuit (11) that converts an AC voltage input from the pair of power supply terminals (10) into a DC voltage. I have. The power supply device (1) according to the first aspect includes a filter circuit (12) provided between a pair of power supply terminals (10) and a conversion circuit (11). The filter circuit (12) has a plurality of choke coils (first choke coil L1 and second choke coil L2). Each of the plurality of choke coils is inserted into the path of the current flowing from the pair of power supply terminals (10) to the conversion circuit (11). The plurality of choke coils are configured so that the magnetic fluxes generated when a current flows are opposite to each other.

The power supply device (1) according to the first aspect suppresses the vibration of a plurality of choke coils as compared with the case where the filter circuit (12) has only one choke coil, and is caused by the vibration of the choke coils. It is possible to suppress the generated noise.

The power supply device (1) according to the second aspect of the present disclosure can be realized in combination with the first aspect. In the power supply device (1) according to the second aspect, the plurality of choke coils flow from one power supply terminal (first power supply terminal 10A) of the pair of power supply terminals (10) to the conversion circuit (11). It is preferably inserted in the current path.

In the power supply device (1) according to the second aspect, when a plurality of choke coils are mounted on a printed wiring board, the distance between the plurality of choke coils is likely to be narrowed. As a result, the power supply device (1) according to the second aspect can further suppress the noise caused by the vibration of the choke coil.

The power supply device (1) according to the third aspect of the present disclosure can be realized in combination with the first aspect. In the power supply device (1) according to the third aspect, the pair of power supply terminals (10) preferably includes a first power supply terminal (10A) and a second power supply terminal (10B). The plurality of choke coils preferably have a first choke coil (L1) and a second choke coil (L2). The first choke coil (L1) is preferably inserted in the path of the current flowing from the first power supply terminal (10A) to the conversion circuit (11). The second choke coil (L2) is preferably inserted in the path of the current flowing from the conversion circuit (11) to the second power supply terminal (10B).

In the power supply device (1) according to the third aspect, the normal mode noise can be reduced by inserting the first choke coil (L1) and the second choke coil (L2) into different paths.

The power supply device (1) according to the fourth aspect of the present disclosure can be realized in combination with the second aspect. In the power supply device (1) according to the fourth aspect, it is preferable that the plurality of choke coils are electrically connected in series with each other.

In the power supply device (1) according to the fourth aspect, when a plurality of choke coils are mounted on a printed wiring board, the distance between the plurality of choke coils can be further narrowed.

The power supply device (1) according to the fifth aspect of the present disclosure can be realized in combination with the second aspect. In the power supply device (1) according to the fifth aspect, it is preferable that the plurality of choke coils are electrically connected in parallel to each other.

In the power supply device (1) according to the fifth aspect, since the current flowing through each of the plurality of choke coils is reduced, the vibration of the plurality of choke coils can be further suppressed.

The power supply device (1) according to the sixth aspect of the present disclosure can be realized in combination with any one of the first to fifth aspects. The power supply device (1) according to the sixth aspect preferably includes a rectifier circuit (13) that rectifies an AC voltage input from a pair of power supply terminals (10). It is preferable that each of the plurality of choke coils is inserted in the path of the current flowing from the rectifier circuit (13) to the conversion circuit (11).

The power supply device (1) according to the sixth aspect can suppress the vibration of a plurality of choke coils and suppress the noise caused by the vibration of the choke coils.

The power supply device (1) according to the seventh aspect of the present disclosure can be realized in combination with any one of the first to sixth aspects. In the power supply device (1) according to the seventh aspect, it is preferable that the filter circuit (12) has two choke coils (first choke coil L1 and second choke coil L2) having the same inductance. ..

In the power supply device (1) according to the seventh aspect, since the inductances of the two choke coils are equal, it is easy to suppress the vibration of these two choke coils.

The power supply device (1) according to the eighth aspect of the present disclosure can be realized in combination with the seventh aspect. The power supply device (1) according to the eighth aspect preferably includes a printed wiring board (16) on which the filter circuit (12) is mounted. On the component surface (160) of the printed wiring board (16), it is preferable that the two choke coils are mounted close to each other by a distance shorter than the outer diameter of the choke coils.

The power supply device (1) according to the eighth aspect can further suppress the vibration of the choke coils by bringing the two choke coils closer to each other.

The power supply device acquisition (1) according to the ninth aspect of the present disclosure can be realized by combining with any one of the first to eighth aspects. The power supply device (1) according to the ninth aspect preferably includes a control circuit (15) that controls the conversion circuit (11). It is preferable that the control circuit (15) measures the conduction angle of the phase-controlled AC voltage input to the pair of power supply terminals (10) and adjusts the output of the conversion circuit (11) according to the conduction angle.

The power supply device (1) according to the ninth aspect can further suppress noise caused by vibration of the choke coil when a phase-controlled AC voltage is input.

The power supply device (1) according to the tenth aspect of the present disclosure can be realized in combination with the ninth aspect. The power supply device (1) according to the tenth aspect preferably includes a housing (17) for accommodating a printed wiring board (16). The housing (17) is preferably made of a ferromagnetic metal.

The power supply device (1) according to the tenth aspect can suppress noise caused by vibration of the choke coil while reducing the manufacturing cost of the housing (17).

The lighting device (3) according to the eleventh aspect of the present disclosure includes a power supply device (1) according to any one of the first to tenth aspects and a light source (1) that is lit by DC power supplied from the power supply device (1). It has LED2) and.

The lighting device (3) according to the eleventh aspect can suppress the vibration of a plurality of choke coils and suppress the noise caused by the vibration of the choke coils.

The lighting device (3) according to the twelfth aspect of the present disclosure can be realized in combination with the eleventh aspect. In the lighting device (3) according to the eleventh aspect, the conversion circuit (11) preferably has a switching converter circuit.

In the lighting device (3) according to the twelfth aspect, the noise generated in the conversion circuit (11) can be reduced by the filter circuit (12).

The luminaire (4) according to the thirteenth aspect of the present disclosure includes the luminaire (3) of the eleventh or twelfth aspect, and at least the luminaire body (40) that supports the light source.

The lighting fixture (4) according to the thirteenth aspect can suppress the vibration of a plurality of choke coils and suppress the noise caused by the vibration of the choke coils.

1 Power supply 2 LED (light source)
3 Lighting device 4 Lighting equipment 10 Power supply terminal 10A First power supply terminal 10B Second power supply terminal 11 Conversion circuit 12 Filter circuit 13 Rectifier circuit 16 Printed wiring board 17 Housing 40 Equipment body L1 First choke coil (choke coil)
L2 2nd choke coil (choke coil)

Claims (13)

A pair of power terminals and
A conversion circuit that converts AC voltage input from the pair of power supply terminals into DC voltage,
A filter circuit provided between the pair of power supply terminals and the conversion circuit,
With
The filter circuit has a plurality of choke coils and has a plurality of choke coils.
Each of the plurality of choke coils is inserted into the path of the current flowing from the pair of power supply terminals to the conversion circuit.
The plurality of choke coils are configured so that the magnetic fluxes generated when the current flows are opposite to each other.
Power supply. The plurality of choke coils are inserted into the path of current flowing from one of the pair of power supply terminals to the conversion circuit.
The power supply device according to claim 1. The pair of power supply terminals includes a first power supply terminal and a second power supply terminal.
The plurality of choke coils are
A first choke coil inserted into the path of the current flowing from the first power supply terminal to the conversion circuit, and
It has a second choke coil inserted into the path of the current flowing from the conversion circuit to the second power supply terminal.
The power supply device according to claim 1. The plurality of choke coils are electrically connected in series with each other.
The power supply device according to claim 2. The plurality of choke coils are electrically connected in parallel to each other.
The power supply device according to claim 2. A rectifier circuit that rectifies the AC voltage input from the pair of power supply terminals is provided.
Each of the plurality of choke coils is inserted into the path of the current flowing from the rectifier circuit to the conversion circuit.
The power supply device according to any one of claims 1-5. The filter circuit has two choke coils, each having the same inductance.
The power supply device according to any one of claims 1-6. A printed wiring board on which the filter circuit is mounted is provided.
On the component surface of the printed wiring board, the two choke coils are mounted close to each other by a distance shorter than the outer diameter of the choke coil.
The power supply device according to claim 7. A control circuit for controlling the conversion circuit is provided.
The control circuit measures the conduction angle of the phase-controlled AC voltage input to the pair of power supply terminals, and adjusts the output of the conversion circuit according to the conduction angle.
The power supply device according to any one of claims 1-8. A housing for accommodating the printed wiring board is provided.
The housing is made of ferromagnetic metal,
The power supply device according to claim 9. With any power supply according to claim 1-10,
A light source that is lit by DC power supplied from the power supply unit,
Have,
Lighting device. The conversion circuit has a switching converter circuit.
The lighting device according to claim 11. The lighting device according to claim 11 or 12,
At least the fixture body that supports the light source and
Have,
lighting equipment.

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