CN103457491A - A steady current circuit structure applied to electroplating car - Google Patents

Abstract

The invention discloses a current stabilizing circuit structure applied to an electroplating vehicle, which comprises a full-bridge current stabilizer U, a comparator, a high-power triode Q and a current divider RW, wherein two input ends of the full-bridge current stabilizer U are respectively connected with a corresponding upper track and a corresponding lower track; one end of the current divider RW is connected with the negative output end of the full-bridge rectifier, and the other end of the current divider RW is connected with the emitting electrode of the high-power triode Q; the positive output end of the full-bridge rectifier is connected with the electroplating bath, the collector of the high-power triode Q is connected with the electroplating workpiece, the negative output end of the full-bridge rectifier is connected with the negative input end of the comparator, and the output end of the comparator is connected with the base of the high-power triode Q. The full-bridge rectifier is used for rectification, the capacitor C is used for filtering, and the shunt RW, the high-power triode Q and the comparator are used for current detection and regulation. Therefore, the invention can effectively ensure the stability of the electroplating current and further effectively ensure the uniformity of the electroplated layer.

Description

A steady current circuit structure applied to electroplating car

technical field

The invention relates to the technical field of electroplating devices, in particular to a current-stabilizing circuit structure applied to electroplating vehicles.

Background technique

With the continuous improvement of automation technology, automated electroplating production lines have been widely used in various electroplating processing plants. Among them, electroplating cars are an important carrier for automated electroplating production lines to complete electroplating operations. During the electroplating process of the copper-clad plate, the current value between the electroplating tank and the copper-plated plate needs to be kept stable, and the required current value is different for copper-plated plates with different sizes, specifications and shapes.

However, the existing automated electroplating production line is difficult to maintain the stability of the electroplating current. Once the current is difficult to maintain stability, it is difficult to guarantee the uniformity of the electroplating layer of the copper plate.

Contents of the invention

The purpose of the present invention is to provide a steady current circuit structure applied to the electroplating car, which can effectively ensure the stability of the electroplating current, and then effectively ensure the stability of the electroplating layer. of uniformity.

In order to achieve the above object, the present invention is achieved through the following technical solutions.

A current stabilizing circuit structure applied to electroplating vehicles, including a full bridge current stabilizer U, a comparator, a high-power transistor Q and a shunt RW, one input end of the full bridge current stabilizer U is connected to the upper rail, and the full bridge stabilizer The other input terminal of the current regulator U is connected to the lower rail; a capacitor C is connected between the positive output terminal and the negative output terminal of the full-bridge current regulator U, and the negative terminal of the capacitor C is connected to the negative output terminal of the full-bridge current regulator U. The positive terminal of the capacitor C is connected to the positive output terminal of the full-bridge rectifier; the positive output terminal of the full-bridge rectifier is connected to the electroplating tank, the negative output terminal of the full-bridge rectifier is connected to the input terminal of the shunt RW, and the input terminal of the shunt RW The output terminal is connected to the emitter of the high-power transistor Q, and the collector of the high-power transistor Q is connected to the electroplating workpiece; the negative output terminal of the full-bridge rectifier is connected to the negative input terminal of the comparator, and the output terminal of the comparator is connected to the high-power transistor Q base connection.

The beneficial effect of the present invention is: a kind of steady current circuit structure that is applied to electroplating car described in the present invention, it comprises full-bridge current stabilizer U, comparator, high-power triode Q and shunt RW, full bridge current stabilizer One input terminal of U is connected to the upper track, the other input terminal of the full-bridge current regulator U is connected to the lower track, and a capacitor C is connected between the positive output terminal and the negative output terminal of the full-bridge current regulator U, and the full-bridge rectifier The positive output end of the full bridge rectifier is connected to the electroplating tank, the negative output end of the full bridge rectifier is connected to the input end of the shunt RW, the output end of the shunt RW is connected to the emitter of the high-power triode Q, and the collector of the high-power triode Q is connected to the electroplating tank. The workpiece is connected, the negative output terminal of the full-bridge rectifier is connected with the negative input terminal of the comparator, and the output terminal of the comparator is connected with the base of the high-power transistor Q. In the working process of the present invention, the full-bridge rectifier is used for rectification, the capacitor C is used for filtering, and the shunt RW, high-power transistor Q and comparator are used for current detection and regulation. Through the above circuit structure design, the present invention can effectively ensure the stability of the electroplating current, and further effectively ensure the uniformity of the electroplating layer.

Description of drawings

The present invention will be further described below using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

The present invention will be described below in combination with specific embodiments.

As shown in Figure 1, a current stabilization circuit structure applied to electroplating vehicles includes a full-bridge current regulator U, a comparator, a high-power transistor Q, and a shunt RW. An input terminal of the full-bridge current regulator U is connected to The upper track is connected, and the other input terminal of the full-bridge current regulator U is connected to the lower track; a capacitor C is connected between the positive output terminal and the negative output terminal of the full-bridge current regulator U, and the negative terminal of the capacitor C is connected to the full-bridge stabilizer The negative output terminal of the rectifier U is connected, the positive terminal of the capacitor C is connected to the positive output terminal of the full-bridge rectifier; the positive output terminal of the full-bridge rectifier is connected to the electroplating tank, and the negative output terminal of the full-bridge rectifier is connected to the input terminal of the shunt RW Connection, the output terminal of the shunt RW is connected to the emitter of the high-power transistor Q, and the collector of the high-power transistor Q is connected to the electroplating workpiece; the negative output terminal of the full-bridge rectifier is connected to the negative input terminal of the comparator, and the output of the comparator The terminal is connected to the base of the high-power transistor Q. Among them, the positive input terminal of the comparator is given a specific value of voltage by the CPU of the electroplating car.

It needs to be further explained that the upper rail and the lower rail of the present invention are connected to power supplies with opposite polarities, and the voltage between the upper rail and the lower rail is AC48V; wherein, the full-bridge rectifier is used to realize the rectification function, the capacitor C is used to realize the filtering function, and the shunt RW , a high-power triode Q and a comparator are used to realize the function of current detection and regulation.

Through the above circuit structure design, the present invention can effectively ensure the stability of the electroplating current, and further effectively ensure the uniformity of the electroplating layer.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (1)

1. a current stabilization circuit structure that is applied to electroplate car, it is characterized in that: include full-bridge flow straightener U, comparator, large power triode Q and shunt RW, the input of full-bridge flow straightener U is connected with getting on the right track, and another input of full-bridge flow straightener U is connected with lower railway; Be provided with capacitor C between the cathode output end of full-bridge flow straightener U and cathode output end, the negative pole end of capacitor C is connected with the cathode output end of full-bridge flow straightener U, and the positive terminal of capacitor C is connected with the cathode output end of full-bridge rectifier; The cathode output end of full-bridge rectifier is connected with electroplating bath, the cathode output end of full-bridge rectifier is connected with the input of shunt RW, the output of shunt RW is connected with the emitter of large power triode Q, and the collector electrode of large power triode Q is connected with electroplating parts; The cathode output end of full-bridge rectifier is connected with the negative input of comparator, and the output of comparator is connected with the base stage of large power triode Q.

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