JP2020061345A - Power supply device for controlling led - Google Patents

Abstract

To solve the problem that, in a power supply device for lighting an LED light source which is generally designed by an electronic circuit, an electronic component has less reliability under an ultra-low temperature atmosphere when the power supply device is installed under an ultra-low temperature of minus 40°C or less and a high temperature of 70°C or more, and particularly in an electrolyte capacitor, an electrolyte freezes under an atmosphere of minus 60°C, posing a problem for an operation of the power supply device, the electrolyte capacitor becomes a short life under the high temperature atmosphere, and thus, a long life as one purpose of adopting an LED light source cannot be achieved.SOLUTION: A problem under an ultra-low temperature atmosphere and a high temperature atmosphere is reliability of an electrolyte capacitor and an electronic component. A power supply for controlling an LED uses a magnetic circuit type stabilizer without using an electronic circuit to light an LED light source in a pulsating DC output by connecting only a rectification bridge to their output end.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an LED control power supply device that can be used in an ultralow temperature of −40 ° C. or lower and a high temperature atmosphere of 70 ° C. or higher.

  Conventionally, mercury lamps were used in factories with high temperature atmosphere of 80 ℃, such as -60 ℃ freezers and blast furnaces, but from the viewpoint of energy saving and long life, lighting using LEDs as light sources. Equipment has come into use.

  A power supply device for lighting an LED light source is generally designed by an electronic circuit, and when this power supply device is used in an ultra-low temperature atmosphere, the reliability of electronic parts cannot be guaranteed. Especially, in an electrolytic capacitor, the electrolytic solution freezes in an atmosphere of -60 ° C, The operation of the power supply device is hindered, the electrolytic capacitor has a short life in a high temperature atmosphere, and the long life, which is one of the purposes of adopting the LED light source device, cannot be achieved.

  In order to solve the above-mentioned problems, it is necessary to provide an LED control power supply device capable of maintaining a long life without losing the performance of the power supply device even in an atmosphere of an extremely low temperature of -40 ° C or lower and a high temperature of 70 ° C or higher.

The reliability of electrolytic capacitors and electronic parts is a problem in ultra-low temperatures of -40 ° C or lower and high temperatures of 70 ° C or higher. As the LED control power source, a magnetic circuit type ballast was used without using an electronic circuit, and a rectifying bridge was connected to the output end thereof to turn on the LED light source with a pulsating DC output.
When used at room temperature, a capacitor may be connected to the output terminal of the bridge for the purpose of slightly raising the lower limit value of the pulsating DC voltage waveform and reducing flicker.

  As described above, according to the present invention, an electrolytic capacitor is not used for a lighting device, and a rectifier bridge is used for a semiconductor, but no problem occurs from a test result at an ultralow temperature of −60 ° C., and 70 ° C. or higher. In the high temperature atmosphere, if the temperature rise of the coil used in the porcelain circuit and the temperature rise of the rectifier bridge are suppressed within the usable temperature range, a long life of the control power supply can be achieved.

  The magnetic circuit type control power supply uses only a magnetic ballast consisting of an iron core and a copper wire, a rectifying bridge, a storage case, a filler, and a lead wire, so the quality is stable compared to the electronic type with many parts, It has the advantages of low cost and no noise. When used at room temperature, a flicker-free LED illumination can be achieved by connecting a capacitor to the output end of the rectifying bridge.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an example of a circuit diagram of an LED control power supply showing an embodiment of the present invention.

  The operation of FIG. 1 will be described. When the power source 3 is applied, a pulsating current flows to the LED light source 2 of the load through the current limiting choke 11 in the magnetic circuit type control power source 1 and the rectifying bridge 12 that converts the output voltage to DC. DC current flows.

  Since the current flowing through the LED light source 2 is a half-wave DC current, flicker may be felt, but flicker is not a problem in an ultra-low temperature atmosphere of -60 ° C or a high temperature atmosphere of 80 ° C due to an environment where there are no people at all times.

In an ultra-low temperature environment of -40 ° C or less, electrolytic capacitors and many electronic components are not used, so performance problems due to freezing of electrolytic solution in electrolytic capacitors do not occur, and there is no malfunction of electronic components, and stable quality can be obtained. . If the temperature rise of the current limiting choke 11 and the rectifying bridge 12 is designed to be 40 K or less in a high temperature atmosphere of 70 ° C. or higher, the life limit is not exceeded even in a high temperature atmosphere of 80 ° C., so that a long life can be used.
In addition to the choke circuit type, it is natural that the magnetic circuit type ballast may use a leakage transformer type, a combined transformer and choke type, and no noise is generated because no electronic circuit type is used. There are advantages.
FIG. 2 is an example of a circuit diagram of another LED control power supply showing an embodiment of the present invention, in which a capacitor 4 is added to the output end of the circuit of FIG. 1 so that the LED light source does not flicker. Suitable for general purpose specifications.

An example of a circuit diagram of an LED control power supply showing an embodiment of the present invention It is an example of a circuit diagram of an LED control power supply showing another embodiment of the present invention.

1 ... Magnetic circuit type control power supply 11 ... Current limiting choke 12 ... Rectifier bridge 2 ... LED light source 3 ... Power supply 4 ... Capacitor

Claims (2)

  An LED control power supply device in which a rectifying bridge is provided on the output side of a magnetic circuit type ballast to turn on an LED light source with a pulsating DC output voltage.   The LED control power supply device according to claim 1, wherein the output terminal of the rectifying bridge is provided with a capacitor.

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