CN201323691Y - HID lamp with intelligent protection device - Google Patents

Abstract

An HID lamp equipped with an intelligent protection device belongs to the technical field of high-intensity gas discharge lamps. The purpose of the utility model is to provide an electronic trigger for HID lamps which can ensure the safe use of HID bulbs, ballasts and electronic triggers and is provided with an intelligent protection device. Its technical points are: between the output end of the ballast (ZL) and the primary coil end of the transformer (T) of the electronic trigger, there is a normally closed contact of a thermal fuse (DB) and a relay (JDQ) in series, and the relay coil is connected to the The controlled silicon (HKG) is connected in series in the circuit power supply circuit, and the output terminal of the secondary coil of the transformer is connected to a voltage sampling control circuit composed of a filter processor (LB), a voltage comparator (DB) and a control circuit (KZ). One input terminal of the comparator is connected to the output terminal of the filter processor, and the other input terminal is connected to the power supply; the output terminal of the voltage comparator is connected to the control circuit, and the output terminal of the control circuit is connected to the control pole (VG) of the thyristor connect.

Description

HID lamp with intelligent protection device

technical field

The utility model relates to an HID lamp equipped with an intelligent protection device, which belongs to the technical field of high-intensity gas discharge lamps.

Background technique

HID is also called high-intensity gas discharge lamp. It replaces the traditional tungsten wire with high-pressure gas wrapped in a quartz tube, and uses high-voltage current to activate the gas to form a beam of arc light, which can continuously discharge and emit light between two electrodes. HID lamps are widely used because of their high energy density and light intensity, high color temperature, long service life and power saving. However, during the use of the HID lamp, due to a short circuit of a component such as the HID bulb, lamp holder, ballast, electronic trigger, or a component in a certain component, or the design of the ballast does not meet the standard (the current is higher than the upper limit of the standard value) ), the power supply voltage is higher than the rated value, and the temperature of the electronic trigger is too high, it is easy to damage the HID bulb, or burn the ballast and electronic trigger.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art, and provide a HID lamp equipped with an intelligent protection device that can ensure the safe use of HID bulbs, ballasts and electronic triggers.

Its technical solution is: a HID lamp equipped with an intelligent protection device, including a fuse, a ballast, an electronic trigger and a HID bulb, characterized in that: the output terminal of the ballast is connected to the primary coil of the transformer of the electronic trigger A temperature fuse and a normally closed contact of a relay are connected in series between one end, the coil of the relay and the thyristor are connected in series in the power supply circuit of the circuit, and the output terminal of the secondary coil of the transformer is connected with a voltage composed of a filter processor, a voltage comparator and a control circuit. A sampling control circuit, wherein one input end of the voltage comparator is connected to the output end of the filter processor, and the other input end is connected to the power supply; the output end of the voltage comparator is connected to the control circuit, and the output end of the control circuit is connected to the controllable Silicon gate connection.

Its technical effect is: since the voltage sampling control circuit is connected to the output terminal of the secondary coil of the transformer, the secondary coil induces the sampling voltage through the transformer, and after being processed by the filter processor, it is input to the input terminal of the voltage comparator, and compared with the input voltage The standard voltage at the other input terminal of the comparator is compared (the rectifiers of different specifications have different input standard voltages of the comparator), so when the sampling voltage is lower than or equal to the standard voltage at the input terminal of the voltage comparator, the control circuit outputs a low level to controllable Silicon control pole, thyristor controlled cut-off; when the ballast or light bulb is short-circuited, the sampling voltage is higher than the standard voltage at the input terminal of the voltage comparator, and the control circuit outputs a high level to the thyristor control pole, so that the thyristor is turned on , the relay coil is energized, and its normally closed contact is disconnected, thereby cutting off the power supply circuit of the HID bulb, and protecting the HID bulb and the ballast. When there is a short circuit in the trigger circuit or a high temperature inside the electronic trigger, the thermal fuse will be blown accordingly, so that the ballast will not be burned due to excessive current, and it will protect the electronic trigger. Therefore, the HID lamp of the present invention has the characteristics of automatically protecting the safety of electronic components; and its structure is simple, and the increased cost is not much.

Description of drawings

Fig. 1 is the electrical schematic diagram of the utility model.

Detailed ways

As shown in Figure 1, a HID lamp with an intelligent protection device includes a fuse, a ballast, an electronic trigger and a HID bulb. Between the output terminal of the ballast ZL and the primary coil end of the transformer T of the electronic trigger CFQ, there is a thermal fuse DB and a normally closed contact of the relay JDQ in series, and the relay coil and the thyristor HKG are connected in series in the circuit power supply circuit, and the transformer The secondary coil is used as a sampling coil, and its output terminal is connected to a voltage sampling control circuit QY composed of a filter processor LB, a voltage comparator DJ and a control circuit KZ. Among them, one input terminal of the voltage comparator is connected with the output terminal of the filter processor, and the other input terminal is connected with the power supply DY; the output terminal of the voltage comparator is connected with the control circuit, and the output terminal of the control circuit is connected with the control circuit of the thyristor. Pole VG connection.

Claims (1)

1, a kind of HID lamp that is provided with intelligent protection device, comprise fuse, ballast, electronic trigger and HID bulb is characterized in that: the normally-closed contact that is in series with Thermal Cutoffs (DB) and relay (JDQ) between transformer (T) primary coil one end of the output of described ballast (ZL) and electronic trigger, relay coil and controllable silicon (HKG) are connected in the circuit supply circuit, the secondary coil output of transformer connects by filter processor (LB), the voltage sampling control circuit that voltage comparator (DB) and control circuit (KZ) constitute, wherein, one input of voltage comparator is connected with the output of filter processor, and another input is connected with power supply; The output of voltage comparator is connected with control circuit, and the output of control circuit is connected with the silicon controlled control utmost point (VG).

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