JPH0729599Y2 - Light dimmer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a dimmer capable of lighting a halogen lamp or the like having a relatively low lighting voltage and adjusting the brightness thereof.

[Conventional technology]

High-luminance, long-life halogen lamps are used for various types of lighting, but these lamps have a low rated voltage and cannot be directly connected to general 100-volt wiring, so they are connected to a special power supply unit to light. Moreover, since the brightness is adjusted by adjusting the voltage, the power loss of the adjusting device is large and it is not economical. In addition to this, a thyristor dimming means can be considered, but this is also a phase control of AC 100 V and cannot be used with a low voltage rating such as a halogen lamp.

It can also be lit by an inverter and consumes little power, but the brightness of the bulb cannot be adjusted.

[Problems to be solved by the device]

As described above, the power supply device for lighting the halogen lamp has been designed to light a lamp rated at 12 V by reducing the voltage from 100 V to 12 V, for example, by means of voltage adjusting means such as a transformer or a resistor or an inverter.

By the way, although it is possible to easily raise or lower the voltage with the voltage adjusting means such as the transformer or the resistor described above, not only is it uneconomical due to the large heat loss of electric power, but the equipment is bulky and difficult to install. In addition, in the inverter, the body can be downsized and bulky, and the power loss is less than that of the transformer and the resistor, but since the output voltage cannot be adjusted, the lamp can be turned on. However, the brightness cannot be adjusted. Therefore, an object of this invention is to provide a dimmer having an inverter capable of adjusting the output.

[Means for Solving the Problems]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a phase control device (1) operated by an AC power source so that the lighting of a halogen lamp and particularly its brightness can be adjusted by an inverter.
A light control device having, along with connecting the DC output of the high frequency oscillator (2 ₁₎ rectifier device to obtain DC power for operating the (4) in high frequency oscillator (2 _1), the rectifier device ( Connect the trigger die auto (D ₁ ) and the coupling capacitor (C ₁ ) in series between the DC output part of 4) and the trigger signal input part of the high frequency oscillator (2 ₁ ) and connect the capacitor (C ₁ ) A trigger device (5) with a discharge resistor (R ₁ ) grounded between the trigger diode (D ₁ ) is connected, and a high frequency oscillator
(2 ₁ ) is provided with an inverter (2) provided with an output part for taking out a high frequency output, and the output part of the phase control device (1) is connected to the power input part of the inverter (2), that is, the rectifying device (4). By connecting the power input section and providing the trigger device (5) between the output section of the rectifier (4) and the trigger signal input section of the high frequency oscillator (2 ₁ ) in the inverter (2), rectification is achieved. The output from the output part of the device (4) is converted into a trigger signal for controlling the phase of the output of the high frequency oscillator (2 ₁ ), and the converted trigger signal is the signal of the high frequency oscillator (2 ₁ ). The input part is made to input. The output of the inverter (2) is adapted to turn on the resistive bulb through the output transformer (T) and adjust the brightness of the bulb.

[Action]

To connect a halogen lamp or the like to the output of the dimmer of the present invention to light it and adjust its brightness, the power switch (S) of the phase controller (1) connected to the AC power supply is used.
When the power is turned on and the power is turned on, the inverter (2) connected to the output part of the phase control device (1) outputs according to the output status of the phase control device (1), and the output part of the inverter (2). A resistive light bulb such as a halogen lamp connected to the output transformer (T) of the above is lit by a high frequency current. And to adjust the brightness of the above-mentioned resistive bulb that is lit, the time constant (t ₁ ) changes and the output phase changes when the variable resistance resistor (VR) of the phase control device (1) is operated. Then, the one with the changed phase is input to the inverter (2), and the inverter (2) outputs electric power from the output section according to the degree of the change of the phase to light the resistive bulb (3) to a desired brightness. It is a thing.

By the way, the conventional inverter shown in FIG. 3 is a high-frequency oscillator that oscillates a high-frequency current in the device, and the output end of the trigger diode (D ₁ ) is connected to the trigger signal input of the oscillator circuit. the input side capacitor and resistor (C ₁₎ a capacitor of the integration circuit consisting of (R ₁₎ (C ₁₎
And one end of the resistor (R ₁ ) are connected, and the other end of the resistor (R ₁ ) on the opposite side is connected to the DC output of the rectifier (4) and the other end of the capacitor (C ₁ ) is grounded. constitute the trigger signal generating unit in the integrating circuit and a trigger diode (D ₁₎ (TG) by, the integrating circuit is charged to the capacitor (C ₁₎ and resistor (R ₁₎ at a time constant due to the capacitor (C ₁₎ when the potential reaches the breakover voltage of the trigger diode (D _1), this time the trigger diode (D ₁₎ is intended to trigger the signal from the output side becomes energized actuates the high-frequency oscillator (2 ₁₎ the high frequency oscillator (2 ₁₎ is between subsequent of the trigger signal is to stop the oscillation and the input of the oscillation trigger signal is stopped. Therefore, even if the load of such an inverter is connected to the output section of the phase control device and the output of the inverter is controlled by phase control,
The inverter does not work and the load on the inverter does not work, so the phase controller cannot work either. This is because the phase control device does not operate unless the load is in the energized state. Therefore, when the phase control device is energized, the phase-controlled output from the output section, that is, the load terminal enters the inverter (2) and the rectifier (4 ) but the DC is rectified is seeks to be fed to the high frequency oscillator (2 ₁₎ to oscillate this output, the high frequency oscillator (2 ₁₎ from the trigger signal generator (TG) It does not oscillate unless it receives the trigger signal of, and this trigger signal is not output immediately even if there is input to the trigger signal generator (TG), but the time is delayed by the time constant of the integrating circuit. The trigger signal generator (TG) cannot operate because it does not oscillate immediately even if it receives the first signal from the phase controller (1), but only charges the capacitor (C ₁ ). , Phase controller 1) operates only for a moment as shown in FIG. 6 and outputs for a short time. In the phase controller (1) in which the magnitude of the output is controlled by the length of the output time, the output is zero in such a state. Therefore, the output of the inverter cannot be controlled by the phase controller.

From this, the present invention provides a phase control device (1) for the trigger signal input part of the high frequency oscillator (2 ₁ ) of the inverter (2).
A trigger device (5) that can continuously apply the output of the device with no delay time and at equal time intervals (t ₂ ) is provided between the rectifier device (4) and the trigger signal input part of the high frequency oscillator (2 ₁ ). By providing the inverter (2), the inverter (2) is activated simultaneously with the operation of the phase control device (1) and continuously operates, and the resistive bulb connected to the load side of the output transformer (T) provided on the output side. The phase control device (1) is capable of adjusting the brightness of a light bulb while turning on, and the starting point (A) and the stopping point (B) of the triac (CR) in the phase control device (1).
The bulb is bright with a long time between, triac (CR)
If the time between the starting point (A) and the stopping point (B) is shortened, the brightness decreases and the image becomes darker.

〔Example〕

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram of the present invention, FIG. 2 shows its wiring, FIG. 3 is a wiring diagram of a conventional inverter, and FIG.
FIG. 5 is a diagram showing waveforms of a gate signal and an output in the phase control device, and FIG. 5 is a diagram showing a waveform of a load current flowing through a resistive bulb connected to the output part of the inverter of the present invention. FIG. 6 is a diagram showing the state of the load current of the phase control device when the conventional inverter as shown in FIG. 3 is connected to the phase control device.

In FIG. 2, (1) is a phase controller which adjusts the load current by using a triac, and the trigger diode (D) is used to activate the triac (CR), and the trigger diode (D) breaks over. By applying the generated trigger signal to the gate of the triac (CR), the triac (CR) becomes energized, and even if the gate signal is stopped, the triac (CR) continues to be energized, but the voltage applied to the anode becomes zero. If that happens, conduction will be cut off. Therefore, if an AC voltage is applied to the triac (CR) and a gate signal is applied in synchronization with the cycle of the power supply, the bulb is "contacted" every half cycle of the power supply cycle.
It is a "cut". Furthermore, the current flowing through the triac can be changed in time depending on the time constant of the series circuit of (VR) and (C) connected in parallel with the triac (CR). That is, the light bulb is bright when the current-carrying time is long, but is dark when the current-carrying time is short. The adjustment of the energization time is often performed by changing the value of (VR) or (C), and the adjustment of the resistance (VR) is easy.

(2) is an inverter commonly called an electronic transformer,
On the output side, it is possible to obtain 12V, 50W output at 40KH to 50KH, and the high frequency oscillator (2 ₁ ) is a transistor.
This is a half-bridge type oscillating device composed of (Q ₁ ), (Q ₂ ), a capacitor (C) and a coil (L). The high frequency oscillator (2 ₁ ) has an output transformer (T) at its output.
The primary winding side is connected and the halogen lamp (3) [12V, 50W] is connected to the secondary winding side. (4) is connected to a high frequency oscillator (2 ₁₎ phase control device the AC input side an alternating current in the DC power supply with rectifier consisting of a bridge-type rectifier to the full-wave rectification of the load end of (1) (Output unit) Then, connect the DC output side to the high-frequency oscillator (2 ₁ ). (5) high-frequency oscillator (2 ₁₎ the trigger signal input unit and the rectifier unit (4) connected to bidirectional trigger diode between the DC output of the (D ₁₎ and the coupling capacitor (C ₁₎ Trigger device (5) consisting of a series connection of and, and a ground between a trigger diode (D ₁ ) and a coupling capacitor (C ₁ ) with a discharge resistor (R ₁ ).
Then, using the AC component of the DC output obtained by rectifying the output of the phase controller (1), the continuous trigger signal obtained by breaking over the trigger diode (D ₁ ) is passed through the coupling capacitor (C ₁ ) In addition to the trigger signal input section of the oscillator (2 ₁ ), the trigger signal continuously oscillates this to turn on the resistive load, that is, the halogen lamp (3), and the phase controller (1) also stops the operation. The one that can be operated continuously without any.

(R ₁₎ is obtained by grounding the other end connected to one end between the capacitor (C ₁₎ of the resistor in the capacitor for discharge to discharge residual electric charge (C ₁₎ and the trigger diode (D _1).

In the present embodiment, the phase control device (1) and the inverter (2) are integrated in the embodiment, but in addition to this, when illuminating in a fixed room in the building, the phase control device (1) is used for the wall surface of the room. It may be used by connecting it to the inverter when necessary by installing it at a fixed place and connecting the output end, that is, the load end, to the inverter (2) with a dedicated terminal such as an outlet. . Furthermore, it goes without saying that the inverter (2) and the lighting device for the halogen lamp may be detachable.

Further, the inverter (2) of the present invention can be used independently of the phase controller (1),
In this case, only the light bulb can be turned on and dimming cannot be performed.

[Effect of device]

This invention is one in which a resistive light bulb (3) such as a halogen lamp is lighted by an inverter (2). In the conventional inverter (2), the light bulb can be lighted but the brightness cannot be adjusted, Even if you try to control this with a phase control device, the two methods do not match, so it is not lighting even if you adjust the brightness,
An inverter (2) is connected to the phase controller (1), a resistive load such as a halogen lamp is connected to the inverter (2), and a trigger signal obtained from the phase controller (1) is supplied to the inverter (2). In addition to the high-frequency oscillator (2 ₁ ), it is possible to continuously oscillate the light, so that the brightness of the light bulb (3) can be adjusted by the phase control method, and the high-frequency oscillation of the inverter (2) is also possible. device (2 ₁₎ trigger signal to oscillate the phase control device (1) rectifier output (4) by adding an AC component of the DC output full-wave rectified to a trigger diode (D ₁₎ by the trigger diode (D ₁ ) is pressurized to the trigger signal input portion of the high-frequency oscillator (2 ₁₎ immediately via a capacitor (C ₁₎ trigger signal occurring at the output side only when the breakover by the voltage rise of the AC component of the DC output Are high frequency oscillator without delay to the signal transmission as in the prior art (2 ₁₎ phase control device since it is intended to operate the (1) is sustained current to the load, the inverter (2) and the phase control unit By operating together with (1), lighting the resistive bulb or halogen lamp (3) connected to the inverter (2) and changing the resistance value of the variable resistor (VR) of the phase controller (1) The brightness of the light bulb (3) can be freely adjusted.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 1 is a block diagram schematically showing the connection between a phase controller, an inverter, and a resistive light bulb such as a halogen lamp. FIG. 2 is a wiring diagram of the present invention. Is a wiring diagram of an inverter that lights a conventional light bulb. FIG. 4 is a diagram showing a relationship between a gate signal of a phase control device and an output current. FIG. 5 is a state of load current flowing through a light bulb connected to an inverter of the present invention. FIG. 6 is a diagram showing a load current of the phase control device when the phase control device is connected to the conventional inverter and started. 1: Phase control device, 2: Inverter 2 ₁ : High frequency oscillator device, 3: Halogen lamp 4: Rectifier device, 5: Trigger device

Claims (1)

[Scope of utility model registration request] 1. A phase controller (1) and an inverter (2).
And an output transformer (T). A resistive light bulb (3) is connected to the output transformer (T) to apply AC power to the phase controller (1), and its output is applied to the inverter (2). In the case of inputting and outputting the output of the inverter (2) through the output transformer (T) to light the resistive bulb (3), the inverter (2) is powered by the DC power supply of the high frequency oscillator (2 ₁ ). is connected to the input portion to the output portion of the phase control device (1), a high frequency oscillator (2 ₁₎ output of the rectifier connected to (4) and the trigger signal input portion of the high-frequency oscillator (2 ₁₎ to the output unit between, one end of the discharge resistor (R ₁₎ between the trigger diode (D ₁₎ and the coupling capacitor (C ₁₎ together with the trigger diode connected in series (D ₁₎ and the coupling capacitor (C ₁₎ High-frequency oscillation by providing a trigger device (5) that is connected to the other end and grounds the other end Location (2 ₁₎ dimmer adjustment of the illumination lamp, characterized in that as obtained by continuously from the output of the phase control device the trigger signal for controlling (1) the.