Intelligent power arrester
A power surge arrester and intelligent power supply technology, applied in the direction of resistors, instruments, electrical components, etc., can solve the problems of SPD spontaneous combustion, failure of varistor tripping, waste of resources, etc., achieve rapid and accurate tripping action, and prevent spontaneous combustion Danger, effect of preventing fire accidents
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[0022] Embodiment 1: Single-chip implementation
[0023] The 80C52 single-chip microcomputer is used as the MCU, and the specific chip selected is the W78LE516B of Winbond. This single-chip microcomputer chip integrates 64K of programmable ROM, 4K of auxiliary ROM, and 32K of RAM. Figure 2 is a general system diagram of this embodiment, describing the system design of the single-chip embodiment.
[0024] As shown in Figure 3 (temperature sensor circuit diagram), the power surge arrester facility is equipped with 4 zinc oxide varistor lightning protection modules, and 4 temperature sensors are needed to monitor its temperature. The temperature sensor is embedded in the zinc oxide varistor of each module. The surface of the, is led out through the lead, plugged into the control circuit board, that is, connected to the JP1 socket in Figure 3. The temperature sensor is connected in series with a 4.7K resistor, and its voltage drop is output to the sample and hold circuit shown in Figu...
Example Embodiment
[0032] Embodiment 2: Advanced Reduced Instruction Machine (ARM) implementation
[0033]ARM (Advanced RISC Machine: Advanced Reduced Instruction Machine) is a 32-bit embedded microcontroller. In this embodiment, STMicroelectronics (ST)’s ARM9 chip STR912FW44×6 is used. This chip integrates 512KB+32KB Flash ROM and 96KB SRAM, CPU main clock frequency 96MHz (from the off-chip 25MHz clock on-chip frequency division), with on-chip 8 analog-to-digital conversion, 80 I / O ports, support LCD display, so it is suitable for Measurement, and has a stronger function.
[0034] Figure 9 is an overall block diagram of the system, describing the system design of the ARM embodiment.
[0035] As shown in Figure 10 (CPU design drawing), P1 and P6 are used for LCD display output, P6.4_P6.7 is used for alarm and trip control signal output, P4 is configured as sensor signal input, P3 and P2 Due to the matrix keyboard input, some pins of the port are equipped with a 3.3V backup battery on pin 39 of the C...
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