Voltage adaptive circuit and plc controller
A self-adaptive circuit and controller technology, applied in control/regulation systems, emergency protection circuit devices, instruments, etc., can solve problems such as line connection errors, signal instability, signal line grounding or short circuit, etc., to achieve stable input voltage, The effect of adapting to a large input voltage range
Active Publication Date: 2021-11-05
GUANGDONG YIZUMI PRECISION MACHINERY
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Problems solved by technology
In the industrial field, due to the complex working environment and conditions of the PLC controller, wrong line connection, grounding or short circuit of the signal line, lightning strikes of electrical equipment, etc., will cause the voltage of the input / output interface of the PLC controller to be unstable.
[0003] The normal operation of the PLC controller requires a reliable and stable voltage. If the input and output (I / O) port voltage is too high or too low, it will affect the normal operation of the PLC controller, resulting in false commands, unstable signals, and even damage to the PLC controller.
Moreover, since the PLC controller has a fixed working voltage, it needs to be connected to devices with the same working voltage. PLC controllers with different working voltages need to be configured with different devices, which limits the scope of application of the PLC controller and increases the cost.
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[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0043] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the figure). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.
[0044] In addition, the descriptions in...
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The invention discloses a voltage adaptive circuit and a PLC controller. The voltage adaptive circuit includes a voltage comparison module and a voltage adjustment module. The voltage comparison module is used to detect the input voltage of the power interface, and output the voltage adjustment signal of the corresponding gear. The voltage adjustment module is used to adjust the corresponding gears of the input voltage of the power interface according to the voltage adjustment signal, so as to convert the voltage input by the interface into a preset working voltage, and the preset working voltage is equal to the working voltage of the PLC controller. The invention automatically adjusts the input voltage of the power interface of the PLC controller through the voltage adaptive circuit to ensure the stability of the input voltage, the PLC controller can be connected to a wider range of power supply voltage, and at the same time, it also protects the PLC controller.
Description
technical field [0001] The invention relates to the field of power electronics, in particular to a voltage adaptive circuit and a PLC controller. Background technique [0002] PLC (Programmable Logic Controller) is the core equipment of industrial control, and its stable operation is very important for normal production. In the industrial field, due to the complex working environment and conditions of the PLC controller, wrong line connection, grounding or short circuit of the signal line, lightning strikes on electrical equipment, etc., will cause the voltage of the input / output interface of the PLC controller to be unstable. [0003] The normal operation of the PLC controller requires a reliable and stable voltage. If the input and output (I / O) port voltage is too high or too low, it will affect the normal operation of the PLC controller, resulting in false commands, unstable signals, and even damage to the PLC controller. Moreover, since the PLC controller has a fixed wo...
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IPC IPC(8): H02M3/158H02H7/12G05F1/56
CPCG05F1/56H02H7/1213H02H7/1252H02H7/1257H02M3/1584
Inventor 何峥周家民
Owner GUANGDONG YIZUMI PRECISION MACHINERY