JPH11163444A - Power supply device for yag laser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ease exchanging work, change of design, production of product series, etc., by changing exchanging of a single part to exchanging of block part rather than conventional methods in which mis-wiring, etc., is apt to occur during exchanging of the single body, and skilled workers were needed for adjustment where switching elements or capacitors, etc., for YAG laser power supply device are exchanged with single body. SOLUTION: A single rectifier D1 for rectifying commercial a.c. and a single capacitor C1 for accumulating electric power are made into a single capacitor block, and respective two sets of switching elements Q1 and Q2 for controlling electric power, reflux diodes D2 and D3, smoothing reactors L1 and L2, smoothing capacitors C2 and C3, etc., are respectively made into two switching blocks 1 and 2 and then are exchanged in units of blocks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a power supply of a YAG laser.

[0002]

2. Description of the Related Art A power supply device of a YAG laser is usually constituted by a circuit as shown in FIG. Since a single lamp for exciting the YAG laser has a small output, a plurality of lamps (two in this figure) are usually used. The circuit includes a transformer T for appropriately boosting three-phase AC power, a full-wave rectifier D1, a capacitor C1 for storing DC power, switching elements Q1 and Q2 for controlling DC power supplied to two excitation lamps F11 and F12, respectively, a return current. Diodes D2, D3, smoothing reactors L1, L2, smoothing capacitors C2, C3
And so on.

Since the electric charge stored in the capacitor C1 reaches hundreds of joules to tens of thousands of joules, a large-capacity capacitor is required. Further, since the currents of the switching elements Q1 and Q2 are several hundred amperes, a large-capacity switching element is required. For this reason, the outer shape and weight of the power supply device become large, and it is difficult for one worker to replace the power supply device in the event of a failure or the like. For this reason, replacement of a capacitor having a long life, a damaged switching element, and the like is performed by a single component.

[0004]

As described above, the replacement of components due to the damage of the switching element of the YAG laser power supply device or the life of the capacitor has been conventionally performed alone, but the replacement of the components alone does not result in incorrect wiring or the like. It was easy to get up and adjustments were made on site, so a skilled worker was required.
The present invention improves the disadvantages of such component replacement,
Changed the replacement of circuit components alone to the replacement of block components,
An object of the present invention is to facilitate replacement work, and also to facilitate design change of a product, serialization, and the like.

[0005]

A conventional YA as described above is used.
The present invention relates to a single rectifier for rectifying a commercial alternating current and a single capacitor for storing the rectified power in a power supply circuit of an excitation lamp of a YAG laser in order to improve a problem of replacement of parts of a G laser power supply. Into a single unit capacitor block, and a single switching element for controlling power, a freewheeling diode, a smoothing reactor, a smoothing capacitor, and the like. Connect parts and blocks with detachable cables,
This is a circuit configuration.

[0006]

FIG. 1 is a circuit diagram of a power supply device for a YAG laser according to the present invention. That is, the rectifier D1 and the capacitor C1 are combined into a single unit capacitor block, and two sets of individual switching elements Q1 and Q2 for controlling power, and return diodes D2 and D2 are provided.
3, the smoothing reactors L1 and L2, the smoothing capacitors C2 and C3, etc. are combined into one unit of switching blocks 1 and 2, respectively.

When the life of the rectifier D1 and the capacitor C1 has expired, the capacitor block containing them is replaced, and the switching elements Q1,
When Q2 is damaged, the return diodes D2, D3, the smoothing reactors L1, L2, the smoothing capacitors C2, C3
The switching blocks 1 and 2 containing the above are exchanged.

FIG. 2 shows an example of the arrangement of the capacitor blocks and the switching blocks 1 and 2 of FIG. 1 and an example of connection of each block by a cable. As described above, since the capacitor block and the switching block are connected by the two cables, the replacement operation is easy, the operation time is shortened, and erroneous wiring is prevented.

FIG. 3 is a circuit diagram of a power supply device of a YAG laser in which the number of blocks is further increased from that of FIG. Only one set of switching circuits is shown for simplicity. As shown, the rectifying part, capacitor part,
It is divided into four blocks, a switching unit and a smoothing unit. It is smaller and lighter, life is easier, maintenance is easier when it is damaged, replacement costs are lower, product design changes, series production, etc. It will be easier.

[0010]

As described in the claims, the present invention relates to a power supply unit for an excitation lamp of a YAG laser.
A single rectifier for rectifying commercial AC and a single capacitor for storing the rectified power are combined into a single unit capacitor block, and a single switching element for controlling power, a return diode, and a smoothing reactor. And a smoothing capacitor etc. are combined into a single unit switching block, and other parts and blocks are connected by a cable to form a circuit. Since the replacement is performed, the replacement operation is facilitated and the operation cost is reduced. In addition, there is an effect that it is easy to change the design of the product or make the product into a series.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a power supply device for a YAG laser according to the present invention.

FIG. 2 is a perspective view showing an example of an arrangement of a capacitor block and switching blocks 1 and 2 of FIG.

FIG. 3 is a circuit diagram of a power supply device of a YAG laser in which the number of blocks is further increased from that of FIG.

FIG. 4 is a circuit diagram of a power supply device of a conventional YAG laser.

[Explanation of symbols]

 T step-up transformer D1 rectifier C1 capacitor Q1, Q2 switching element D2, D3 freewheeling diode L1, L2 smoothing reactor C2, C3 smoothing capacitor

Claims (1)

[Claims] 1. A power supply device for an excitation lamp of a YAG laser, a single rectifier for rectifying commercial AC and a single capacitor for storing the rectified power are collectively formed as a single unit capacitor block, and power is controlled. A single switching element, a freewheeling diode, a smoothing reactor, a smoothing capacitor, etc. are combined into a single unit switching block, and other circuit parts and blocks are connected by a detachable cable to form a circuit. A power supply device for a YAG laser.