KR20160066374A - Dimmer Switch using DC Switching Device - Google Patents

Abstract

Recently, there has been a growing emphasis on the importance of green industries for energy savings, recently. As an example, the propagation of an LED lightening is activated. It is the trend toward the prohibition of sale on a light bulb of low efficiency. For energy savings, a dimmer switch in the method of a phase control using a TRIAC, which is an AC switching device, has been used. However, the dimmer switch of such method has no problem of generating a flicker when used for a light bulb. However, when it is used for an LED lamp, a flicker generates, and thus it is difficult to use. Moreover, when dimming is performed by using a dimmer in the method of a TRIAC, a power factor is remarkably reduced, and thus the quality of power source is greatly damaged. The present invention is devised to eliminate such problem. Since the dimmer switch of the present invention uses a high speed switching method using a DC switching device, as compared to the convention dimmer switch, there are improvement effects such that power factor is remarkably improved, and a flicker does not generate as to an LED lamp. Thus, the quality of a commercial power supply is not distorted, it is expected to greatly contribute to the distribution of an LED lamp and energy savings.

Description

[0001] The present invention relates to a dimmer switch using a DC switching device,

The present invention relates to a switch, that is, a dimmer switch, in which a switch for controlling the ON / OFF illumination of the illumination lamp is also capable of controlling the brightness of the illumination lamp.

Recently, the green industry has been spreading globally to save energy. Especially, in the case of the illumination lamp, it is common to use the brightness varying depending on the activity contents of the user. However, since the conventional dimmer position uses a dimmer in which phase control is performed using a triac,

1. Power Factor is significantly worse when dimming.

2. The point where flickering phenomenon of brightness shakes in guitar except incandescent bulb is severe point.

And it was difficult to use it in other places except the incandescent lamp. Therefore, such a dimmer position has been required in which the power factor is not remarkably lowered and there is no flicker phenomenon.

It is an object of the present invention to provide such a dimmer position in which a dimmer switch is connected to a switch and dims a lamp to be used but the flicker phenomenon does not significantly decrease in the power factor.

The dimmer position of the present invention can be controlled by using a DC high speed switch [FET or the like] without using a phase control method using a conventional AC switching device [TRIAC, etc.] It is a dimmer position that improves the power factor and improves the flicker by controlling the brightness of the lamp in various ways.

If all households use 50% of the load power by using the conventional phase control dimmer position, the quality of the power supplied to each household is remarkably distorted and if the transformer is severely blown, It gives an extreme crowd. Almost all countries, including the Republic of Korea, therefore require more than 90% power factor of lighting lamps. From this point of view, it would be appropriate to prohibit the sale of the dimmer position of the conventional phase control method.

It is possible to dimming the illumination lamp by using the DC switching element instead of the AC switching element according to the present invention. Even if dimming the illumination lamp, the power supply quality is not significantly distorted as in the conventional method, There is an improvement effect that eliminates the flicker phenomenon that may occur in the illumination lamp.

1 is a circuit diagram and block diagram of a conventional dimmer position using an AC switching element
2 is a circuit diagram and block diagram showing one embodiment of the dimmer position of the present invention using a DC switching element;
Fig. 2.1 is a circuit diagram of the first bridge rectifier circuit block in Fig.
Fig. 2.2 is a circuit configuration diagram of the second bridge rectifier circuit block in Fig.
Figure 3.1 shows the waveform of the power supplied to the illumination lamp when 50% dimming using a conventional AC switching device
Figure 3.2 shows the waveform of the power supplied to the illumination lamp when 50% PWM dimming is performed using a DC switching device in the present invention.
Figure 3.3 shows the waveform of the electric power supplied to the illumination lamp when the central portion of the input electric waveform is dimmed by using the DC switching element in the present invention,
Figure 3.4 shows the waveform of the power supplied to the illumination lamp when PWM dimming is performed while the central portion of the input electrical signal is turned off using the DC switching element in the present invention.
Description of the Related Art
AC; AC power source
SW; Dimers location
SW _IN ; Switch input terminal to AC power input to dimus position
SW 1 out; Switch output terminal for AC power to lamp 1
SW 2 out; Switch output terminal that AC power is output to lamp 2
One ; Power supply
11; The constant-
2 ; The central control unit
21; Microcomputer control section
22; Remote sensor
23; key sensor
24; The phase-
3; The switching element section
4 ; Bridge rectifier
4.1; The first bridge rectifier circuit block
4.2; The second bridge rectifier circuit block
1 _IN ; The first bridge rectifier circuit input terminal
1 _OUT ; The first bridge switch output terminal
1+; First bridge rectifier circuit + output terminal
1 _G ; First bridge rectifier circuit ground terminal
2 _IN ; The second bridge rectifier circuit input terminal
2 _OUT ; The second bridge rectifier circuit switch output terminal
2+; Second bridge rectifier circuit + output terminal
2 _G ; Second bridge rectifier circuit ground terminal
S ₁ [FET ₁ ], S ₂ [FET ₂ ]; The first and second DC switching elements
D ₁ , D ₂ ; The first and second diodes
C ₁ ; The first capacitor
L ₁ , L ₂ ; The first and second noise countermeasures coils
R ₁ , R ₂ ; The first and second resistors

When the dimmer position using the DC switching device of the present invention for achieving the above object is connected to the dimmer position as shown in the waveform of Fig. 3.2 to control the power source to be used, In contrast to the conventional dimmer switch for controlling the power applied thereto,

1. Significant improvement of power factor [Power Factor]

2. It has the effect of eliminating the flicker phenomenon that may occur in the lighting lamp

In order to realize this, in the present invention, bridge rectification circuit blocks [41, 42] are formed between the switch line input [SW _IN ] terminal and the switch line outputs [SW1 _OUT , SW2 _OUT ] terminals as shown in FIG. The configuration of the bridge rectifier circuit block is shown in Fig. 2.1 and Fig. 2.2. In order to turn ON the lamp 1 [Lamp 1], the first DC switching element must be turned ON. When the SW _IN terminal voltage is higher than the SW _OUT terminal voltage,

And when the voltage of the SW _IN terminal is lower than the voltage of the SW _out terminal,

So that the current flows through the path of FIG.

In any of the above cases, it can be seen that a current flows through a path of 1+? L ₁ ? S ₁ [FET ₁ ]? _1G

It can be easily seen that in Fig. 2.1, in order to flow the current in both directions between the 1 _IN terminal and the 1 _OUT terminal, the 1+ terminal and the 1 _G terminal are short-circuited.

The 1+ terminal and the _1G terminal are short-circuited through the coil [L ₁ ] without directly shorting it to attenuate the noise generated when the first switch [FET ₁ ] is turned on and off. So that the current can flow through the path of L ₁ → D ₁ → C ₁ → _1G .

On the other hand, if 1+ terminal and _1G terminal are opened [OPEN], it can be seen that no current can flow between 1 _IN terminal and 1 _OUT terminal. In other words, to turn OFF [OFF] the lamp 1, 1+ terminal and _1G terminal should be opened. That is, a DC switching element [FET ₁ ] is constituted between the 1+ terminal (first bridge rectification + terminal) and the 1 _G terminal (first bridge rectification ground terminal) and the lamp 1 is turned on On and off. On the other hand, the brightness of the lamp is controlled by changing the ratio of the on time and the off time while rapidly repeating the ON time and the OFF time. Since the DC switching device is capable of high-speed switching, if the switching frequency is set to a multiple of 300 (the least common multiple of 50 and 60) [300, 600, 1200, etc.] for use in common both in the 50 Hz region and the 60 Hz region, High-quality dimming dimming is possible.

Also, when the DC switching device is used, it can be controlled to be turned off from the central portion of the input electrical signal as shown in FIG. 3.3, and the center portion (phase 90 degrees and phase 270 degrees) of the input electrical signal is necessarily turned off , And other parts can be controlled by PWM method. It is best to increase the dimming control range by controlling the dimming while turning off the center of the input electrical signal (phase 90 ° and phase 270 °).

In FIG. 2, the power supply unit [1] is configured to supply the dimmer position driving power. The power is supplied to the C ₁ through D ₁ and D ₂ at the off-time of the lamp, To the central control unit [2]. Central control unit [2] to the microprocessor control unit [21] receives the control command from the Key sensor [23] receive or enter a remote control command from the remote control sensor [22] and controls the DC switching device [FET _1, FET _2]. In the conventional dimmer switch, about 20% off time should be given even in the maximum brightness state. However, in the dimmer switch of the present invention, when the control is performed as shown in Fig. 3.4 at the maximum brightness, You can get enough supplies.

Claims (4)

Lamp [Lamp1] One terminal is directly connected to the commercial AC power source and the other terminal of the lamp is a di-commerce position to drive the lamp that is connected to the output terminal of the switch, the switch input terminal [SW _IN] and at least one switch, the output of the And a terminal [SW1out], and a bridge rectification circuit block [41] is formed between the switch input terminal [SW _IN ] and the switch output terminal [SW1out] [1+] a coil [L _1] to DC switching device drain [D] has the DC switching element connected to the terminal, and the ground terminal [1 _G] of the bridge rectifier circuit block [41] of [FET _1] through [ FET _1] source [S] and configured to connect the terminal, the DC switching element the gate terminal of the [FET _1] of the to configure the connection to the microprocessor control unit [21] of the central control unit [2], wherein the microcomputer control unit [21] said DC switching device [FET _1] a whole, how the coming off control Dimmer switch for controlling the on and off, and the brightness of the lamp. Claim that the presented the method, a multiple of the microcomputer control unit [21] is the DC switching devices to control the brightness of the lamp in such a way that on and off control of the [FET _1], on, for the off-frequency of 300 to 1, wherein Further included Dimes location. According to claim 1, wherein said microcomputer control unit [21] is the DC switching device [FET ₁ - the on and off phase 90˚ 270˚ site and the phase region of the AC electric signal input to the switch when the control is sure to off [OFF ]. ≪ / RTI > The method of claim 1, wherein one terminal of the coil [L _1] and a diode to the node [NODE] The DC switching element connected [D _1] connection and the diode an anode of [D _1] The cathode condenser [C _1] of And the other terminal of the capacitor C ₁ is connected to the ground terminal 1 _G so that the DC switching element FET ₁ drives the electric energy charged in the capacitor C ₁ in the off- Dimmer position further including use as power source.

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