Hot runner three-phase current multichannel voltage control system and control method thereof

Abstract

The invention relates to a hot runner three-phase current multichannel voltage control system, which comprises a three-phase current input end, a three-phase current input protection circuit, a three-phase current zero-crossing detection circuit, a multichannel thyristor output control circuit, an output current acquisition detection circuit, an output voltage acquisition detection circuit, a heating coil open / short circuit detection circuit, an MCU core circuit and a CAN communication circuit, wherein the three-phase current input protection circuit is connected with the three-phase current input end; the three-phase current input protection circuit is connected with the multichannel thyristor output control circuit and the three-phase current zero-crossing detection circuit; the three-phase current zero-crossing detection circuit is connected with the MCU core circuit, and a detection result can be sent to the MCU core circuit; the MCU core circuit is connected with the multichannelthyristor output control circuit, and output parameters are sent to the thyristor output control circuit; and the thyristor output control circuit is connected with a heating coil load.

Description

technical field [0001] The invention relates to a voltage control method and system, in particular to a voltage control used in intelligent hot runner temperature control in the field of industrial injection molds. Background technique [0002] The current voltage controllers are mostly single-phase power supply single-channel output constant voltage, simple design, use buttons to set and control, each controller works independently, and access to a certain phase of industrial three-phase power to obtain power during use . [0003] The first way is that in the industrial application environment, since a certain phase of the industrial three-phase power is connected to obtain power during use, it is difficult to achieve an equal distribution of the input power of each phase of the three-phase power, especially for large factories when the quantity Too much, it is easy to cause a large voltage difference between the phase voltages of the three-phase electricity, resulting in ...

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Problems solved by technology

[0003] The first way is that in the industrial application environment, since a certain phase of the industrial three-phase power is connected to obtain power during use, it is difficult to achieve an equal distribution of the input power of each phase of the three-phase power, especially for large factories when the quantity Too much, it is easy to cause a large voltage difference between the phase voltages of the three-phase electricity, which will lead to overheating and aging of the line or affect other equipment; second, there is no corresponding protection function, no current or voltage detection at the high-voltage output terminal, and no detection of load heating. Whether the coil is open circuit or short circuit, it is easy to cause some accidents; the third is that there is no communication interface, and centralized control and monitoring cannot be achieved

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