Halogen lamp high voltage excitation device, halogen lamp device and lighting environment box

Abstract

A halogen lamp high-voltage excitation device, a halogen lamp device and a lighting environment box, wherein the halogen lamp high-voltage excitation device includes: a lighting circuit, the lighting circuit uses an input AC low-voltage working source to provide a working voltage to the halogen lamp, the lighting circuit is connected in series with at least one primary of an autoamplifier, a boost circuit, the boost circuit is connected in series with a timing switch, and when the timing switch is turned on, the input AC low-voltage working source is boosted to a high-voltage excitation source; the AC low-voltage working source, the secondary of the autoamplifier, the high-voltage excitation source, and the vacuum discharge tube are connected in series to form a circuit. During the lighting process, the characteristics of the autoamplifier L with large inductance at small currents and the inductance tending to saturate at large currents, which greatly reduces the inductance, are fully utilized, and the re-injection current is suppressed to ensure the safety of the power supply. After the lighting is completed, the inductance is greatly reduced due to the saturation of the autoamplifier L, and the power is supplied by the AC low-voltage working source Us, thereby improving the system efficiency.

Description

Technical Field

[0001] The invention relates to a halogen lamp high-voltage excitation device, a halogen lamp device and a lighting environment box. Background Art

[0002] Halogen lamps are light sources that generate arc discharges by using the transitions between different energy levels of halogen gas atoms. Metal halide lamps are a type of high-intensity gas discharge lamp, belonging to the category of metal halide lamps. They have strong linear spectrum radiation in the wavelength range of 350nm-450nm, and their main peak wavelengths are the resonant radiation spectrum of gallium at 403nm-417nm. In the field of environmental reliability testing, high-power, full-spectrum, and high-irradiation intensity lighting conditions are usually used to accelerate the material changes and color decay of simulated materials after long-term sunlight exposure.

[0003] In the prior art, there are two common types of halogen lamp excitation devices (triggers): vibrator triggers and electronic triggers. The principle of the vibrator trigger is shown in the attached figure. Figure 1 Its working process is: press button K, the primary coil of T1 is energized to generate magnetism, causing the oscillator Z contact to disconnect. After the coil loses magnetism, the Z contact closes, and this cycle repeats. Through the on and off of Z, the energy of the primary coil of T1 is transferred to the secondary coil, generating several thousand volts of high voltage to charge C2. When the voltage reaches the breakdown point of the high-voltage discharger G, the electric energy on C2 is discharged through G and the primary coil of T2, and then tens of thousands of volts of high voltage are generated on the secondary coil of T2 to complete the high-voltage excitation. The working principle of the electronic trigger is similar to that of the oscillator trigger. Both use a secondary boost method and a pulse current to charge the charging capacitor. The difference is that the oscillator contact structure is replaced by a pulse modulated signal, as shown in the attached figure. Figure 2 shown.

[0004] Although the above two common types of halogen lamp triggers are relatively mature and widely used, they still have inevitable defects. Among them, the contacts of the high-voltage discharger of the vibrator trigger will form an oxide film over a long period of time, affecting the reliability of the trigger; the life of the vibrator mechanical structure will affect the life of the entire lamp system; the mechanical vibration when the vibrator is in contact can easily cause repeated triggering, which will affect the service life of the lamp. The electronic trigger avoids many defects of the vibrator trigger and has been widely recognized in use, but as an automation equipment lighting environment box, it still has some defects, such as easy to form high-frequency radiation, which will interfere with the system's microcontroller; the electronic circuit is easily damaged by the energy recharge of the trigger; the control is relatively complex, reducing the reliability of the system. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a high-voltage excitation device for a halogen lamp.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a halogen lamp high-voltage excitation device, comprising:

[0007] A lighting circuit, wherein the lighting circuit uses an input AC low-voltage working source Us to provide a working voltage to a halogen lamp, and the lighting circuit is connected in series with a primary of at least one auto-amplifier L;

[0008] Boost circuit, the boost circuit is connected in series with a timing switch Kc, when the timing switch Kc is turned on the input AC low-voltage working source Us is raised to a high-voltage excitation source Ut;

[0009] The AC low-voltage working source Us, the secondary of the autoamplifier L, the high-voltage excitation source Ut, and the vacuum discharge tube G are connected in series to form a loop.

[0010] In some embodiments, the boost circuit includes a boost transformer T, the AC low-voltage working source Us, the timing switch Kc and the primary side of the boost transformer T are connected in series to form a circuit, and the AC low-voltage working source Us, the secondary of the autoamplifier L, the secondary side of the boost transformer T and the vacuum discharge tube G are connected in series to form a circuit.

[0011] In some embodiments, there are two autoamplifiers L, which are respectively connected in series to the input and output sides of the halogen lamp. The secondary side of the boost transformer T and the two ends of the vacuum discharge tube G are connected in series to the corresponding secondary of the autoamplifier L.

[0012] In some embodiments, the iron core of the autoamplifier L is a soft magnetic core.

[0013] In some embodiments, a filter capacitor C1 is connected to both ends of the AC low-voltage working source Us, a protection capacitor C3 is connected in parallel to the filter capacitor C1, and a filter capacitor C2 is connected in parallel to the primary side of the step-up transformer T.

[0014] Another technical problem to be solved by the present invention is to provide a halogen lamp device.

[0015] In order to solve the above technical problems, the technical solution adopted by the present invention is: a halogen lamp device, including the halogen lamp high-voltage excitation device of any one of the above embodiments, and also including a halogen lamp, and the halogen lamp is connected in series in the lighting circuit.

[0016] Another technical problem to be solved by the present invention is to provide a lighting environment box.

[0017] In order to solve the above technical problems, the technical solution adopted by the present invention is: a lighting environment box, including a halogen lamp device, the halogen lamp device includes a halogen lamp, and also includes the halogen lamp high-voltage excitation device including any one of the above-mentioned embodiments, and the halogen lamp is connected in series in the lighting circuit.

[0018] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the step-up transformer upgrades the AC low-voltage working source to a high-voltage excitation source, and then the voltage after the AC low-voltage working source and the high-voltage excitation source are connected in series acts on the secondary of the autoamplifier L, so that the high voltage after the output of the autoamplifier acts on the halogen lamp, and the high voltage at this time prompts the halogen gas atoms to transition to produce arc discharge to complete the lighting. In the lighting process, the characteristics of the autoamplifier L with large inductance when the current is small and the inductance tends to saturate when the current is large, which greatly reduces the inductance. The current of the autoamplifier is small at the beginning, and the saturated inductance is not very large. The re-injection current is suppressed to ensure the safety of the power supply, avoid the situation where the high-voltage excitation source Ut interferes with the AC low-voltage working source Us, and reduce the electromagnetic interference generated by di / dt. After the lighting is completed, the inductance is greatly reduced due to the saturation of the autoamplifier L, and the AC low-voltage working source Us is used for power supply, with a small voltage drop, thereby improving the system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a schematic diagram of an oscillator trigger circuit in the prior art;

[0020] Attached Figure 2 It is a schematic diagram of an electronic trigger circuit in the prior art;

[0021] Attached Figure 3 This is a circuit diagram of a high voltage excitation device for a halogen lamp according to the present invention;

[0022] Attached Figure 4 It is the curve of core inductance changing with current;

[0023] Among them, 1. Lighting circuit; 2. Boost circuit. Specific implementation plan

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] The invention relates to a halogen lamp high-voltage excitation device, which is applied to a halogen lamp device. The halogen lamp device is applied to a lighting environment box.

[0026] In detail, the halogen lamp high-voltage excitation device includes a lighting circuit 1, which uses the input AC low-voltage working source Us to provide working voltage to the halogen lamp K; a boost circuit 2, which boosts the input AC low-voltage working source Us to a high-voltage excitation source Ut when the timing switch Kc is turned on.

[0027] Two autoamplifiers L are connected in series in the lighting circuit 1 and are arranged on both sides of the halogen lamp K respectively. The AC low-voltage working source Us, the primary of one autoamplifier L, the halogen lamp K, and the primary of another autoamplifier L constitute the lighting circuit 1.

[0028] The boost circuit 2 includes a boost transformer T, an AC low-voltage working source Us, a timing switch Kc and a primary side of the boost transformer T connected in series to form a circuit, and an AC low-voltage working source Us, a secondary of an autoamplifier L, a secondary side of the boost transformer T, a vacuum discharge tube G, and a secondary of another autoamplifier L connected in series to form a circuit.

[0029] In this embodiment, as shown in the attached Figure 3 As shown, the three wirings that can be connected to the AC low-voltage working source Us have terminals A, B, and C respectively, and the switch Kc is located on the terminal A. When the timing switch Kc is closed, the circuit formed by the AC low-voltage working source Us, the timing switch Kc and the primary side of the step-up transformer T in series is turned on. At this time, the primary side voltage Uc of the step-up transformer T is equal to the AC low-voltage working source Us. Through the boosting of the step-up transformer T, the high voltage formed by the AC low-voltage working source Us and the high-voltage excitation source Ut in the circuit where the vacuum discharge tube G is located is sufficient to make the two-stage discharge of the vacuum discharge tube G turn on, so that the high-voltage excitation source Ut, after being connected in series with the AC low-voltage working source Us, adds the sum of the voltages of the two to the secondaries of the two autoamplifiers L respectively, and the voltage is amplified by the two autoamplifiers L at the primary end to obtain a secondary boost voltage Uk, which is added to the two stages of the halogen lamp K. Then, the halogen gas atoms inside the halogen lamp K with the voltage at both ends Uk transition to generate arc discharge to complete the lighting of the halogen lamp K.

[0030] At this time, if attached Figure 4 As shown in the figure, when the timing switch Kc is just closed, the current of the coupling amplifier L is small, the saturation inductance of the auto-coupling amplifier L is not very large, and the re-injection current is suppressed to ensure the safety of the power supply. However, as the transition density of halogen atoms inside the halogen lamp K increases rapidly, the internal impedance of the halogen lamp K drops rapidly from the high impedance state before excitation. At this time, the current provided by the AC low-voltage working source Us also increases rapidly, which is enough to keep the halogen lamp K normally on. At this time, the timing switch Kc is disconnected. The whole process takes about 2s. The closing and disconnection of the timing switch Kc can be controlled by the software program. At this time, the boost circuit 2 is not conducting, and the AC low-voltage working source Us supplies power normally. At this time, the lighting circuit 1 only relies on the input AC low-voltage working source Us to provide working voltage to the halogen lamp K. As the output current of the AC low-voltage working source Us increases, the current of the auto-coupling amplifier L increases accordingly, and the auto-coupling amplifier L begins to gradually tend to saturation, while the inductance value decreases exponentially, and finally reaches a smaller inductance value, forming the normal conduction of the lighting circuit 1, and the AC low-voltage working source Us supplies power to the halogen lamp K stably according to the power.

[0031] Among them, the autoamplifier L adopts a new type of soft magnetic core, which fully utilizes the characteristics of the autoamplifier L that the inductance is large when the current is small and the inductance tends to saturate when the current is large, which greatly reduces the inductance. When the timing switch Kc is closed and the lighting is turned on, the high voltage is excited to turn on the light. The autoamplifier L prevents the energy from being recharged during the excitation and damaging the power supply, and reduces the electromagnetic interference generated by di / dt. In addition, after the timing switch Kc is disconnected and the high voltage excitation lighting is completed, the inductance of the autoamplifier L is greatly reduced due to the saturation of the inductance, so that the AC low-voltage working source Us has a smaller voltage drop, thereby improving the system efficiency.

[0032] In this embodiment, as shown in the attached Figure 3 As shown, filter capacitors C1 are connected at both ends of the AC low-voltage working source Us, and a protection capacitor C3 is connected in parallel to the filter capacitor C1 to prevent C1 from being damaged; a filter capacitor C2 is connected in parallel to the primary side of the step-up transformer T to filter the AC voltage.

[0033] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A halogen lamp high voltage excitation device, characterized in that: include: A lighting circuit (1), wherein the lighting circuit (1) provides a working voltage for a halogen lamp (K) from an input AC low-voltage working source (Us), wherein the lighting circuit (1) is connected in series with the primary of at least one autoamplifier (L), and a boost circuit (2), wherein the boost circuit (2) is connected in series with a timing switch (Kc), and when the timing switch (Kc) is turned on, the input AC low-voltage working source (Us) is boosted to a high-voltage excitation source (Ut); the AC low-voltage working source (Us), the secondary of the autoamplifier (L), the high-voltage excitation source (Ut), and a vacuum discharge tube (G) are connected in series to form a circuit, and the boost circuit (2) comprises a boost transformer (T), wherein the AC low-voltage working source (Us), the timing switch (Kc) and the primary side of the boost transformer (T) are connected in series to form a circuit, and wherein the AC low-voltage working source (Us), the secondary of the autoamplifier (L), the secondary side of the boost transformer (T) and the vacuum discharge tube (G) are connected in series to form a circuit, There are two autoamplifiers (L), which are respectively used to be connected in series to the input and output sides of the halogen lamp (K). The secondary side of the boost transformer (T) and the two ends of the vacuum discharge tube (G) are respectively connected to the secondary of the corresponding autoamplifier (L). The iron core of the autoamplifier (L) is a soft magnetic core. The two ends of the AC low-voltage working source (Us) are connected to a filter capacitor (C1), and a protection capacitor (C3) is connected in parallel to the filter capacitor (C1). The primary side of the boost transformer (T) is connected in parallel to a filter capacitor (C2).

2. A halogen lamp device, comprising the halogen lamp high-voltage excitation device according to claim 1, characterized in that: It also comprises a halogen lamp (K), wherein the halogen lamp (K) is connected in series in the lighting circuit (1).

3. A lighting environment box, characterized in that: The invention comprises a halogen lamp device, wherein the halogen lamp device comprises a halogen lamp (K), and further comprises a halogen lamp high-voltage excitation device as claimed in claim 1, wherein the halogen lamp (K) is connected in series in the lighting circuit (1).

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