Relay control device and method
A relay control and inverter technology, applied in relays, circuits, electrical components, etc., can solve the problem of relay misconnection, etc., and achieve the effect of enhancing reliability, convenient and quick use, and avoiding relay misconnection.
Inactive Publication Date: 2016-06-08
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0004] Embodiments of the present invention provide a relay control device and method to at least solve the problem in the prior art that a weak pull-up signal is mistakenly identified as a high-level signal, resulting in false conduction of the relay
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[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0018] An embodiment of the present invention provides a relay control device, which is applied to a high-power frequency conversion cabinet. figure 2 is a schematic structural diagram of a relay control device according to an embodiment of the present invention, such as figure 2 As shown, the relay control device includes: a main control board 100 and a relay control board 200 .
[0019] The main control board 100 includes: a main control chip 101 and an optical fiber transmitter 102 . The general-purpose input and output port (GPIO port) of the main control chip 101 is connected to one end of the voltage dividing resistor 103, and the other end of the voltage dividing resistor 103 is respectively connected to the input end of the first inverter 104 and the pull-down resistor 105, ...
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The invention discloses a relay control device and method, wherein the device comprises a main control board and a relay control board. The main control board comprises a main control chip and an optical fiber transmitter. A general input and output port of the main control chip is connected to a voltage dividing resistor, and the other end of the voltage dividing resistor is connected to an input end of a first inverter and a pull-down resistor. An output end of the first inverter is connected to a control port of the optical fiber transmitter, and the other end of the pull-down resistor is grounded. The first inverter is used for identifying a weak pull-up signal after voltage division into a low level and driving the optical fiber transmitter on the condition that a relay control signal emitted by the main control chip is the weak pull-up signal. The relay control board comprises an optical fiber receiver. The optical fiber receiver is connected with a second inverter, a switch circuit and a relay control port in sequence. The optical fiber receiver is connected with the optical fiber transmitter through an optical bier cable. According to the invention, the weak pull-up signal is identified into the low level, so that the problem of false conduction caused by the weak pull-up signal is effectively avoided.
Description
technical field [0001] The invention relates to the technical field of relay control for high-power frequency conversion cabinets, in particular to a relay control device and method. Background technique [0002] At present, in the high-power frequency conversion cabinet, the main control board and the relay control board are generally designed separately and independently, and the two are connected by optical fibers. Its structure is as follows: figure 1 shown. based on figure 1 In the shown structure, the commonly used relay control method is: the main control chip 11 sends a relay control signal to drive the LED (LightEmittingDiode, light-emitting diode) in the optical fiber transmitter 13 through the optical fiber drive circuit 12; the optical fiber receiver on the relay control board 20 21 receives the relay control signal sent by the main control board 10 through the optical fiber cable 30, and the optical fiber receiving circuit 22 transmits the relay control signal...
Claims
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IPC IPC(8): H01H47/00
CPCH01H47/00
Inventor 李燕张良浩刘敏通牛高产
Owner GREE ELECTRIC APPLIANCES INC