Three-phase electrical-automatic balancing switchover single-phase electrical control circuit
An automatic balancing and control circuit technology, applied in the direction of conversion equipment that can be converted to DC without intermediate conversion, can solve the problems of zero line live danger, three-phase imbalance, current flow, etc., to save electricity, three Phase balancing, avoiding the effect of high voltages
Inactive Publication Date: 2015-06-10
陈力维
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Problems solved by technology
[0002] When the three-phase load of the three-phase power supply is asymmetrical, a large current will flow on the neutral line, because the neutral line has a certain resistance, so there will be a certain voltage at both ends of the wire, which will also cause electric shock ACCIDENT
For example, if the light bulb of the table lamp in the workshop is broken, find a new one and replace it. If the three-phase load in the workshop happens to be asymmetrical, you will be shocked if you accidentally touch the neutral line, even if the live line switch is not turned on. It will also cause an electric shock, which is caused by the unbalance of the three phases. It is very dangerous to have the neutral line charged, and it will cause a safety accident.
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[0009] exist figure 1 In the shown embodiment, its working principle is: utilize the deformation formula U=IR of Ohm's law, have used single-chip processor in the circuit, through a single-chip processor, the voltage and the electric current of three-phase circuit are processed, each The voltage and current of each phase are judged, and the phase with higher voltage and lower current is selected for single-phase use, and it is automatically switched to a single-phase load circuit.
[0010] exist figure 2 In the shown embodiment, there are three-phase electricity (Y) phase, (U) phase, (V) phase and common neutral line (N), single-phase electricity (L) phase, transformer (T1), integrated block (U1) , (U2), crystal oscillator (Y1), relays (J1), (J2), (J3), diodes (D1), (D2), (D3), resistors (R1), (R2), (R3), potential (R4), (R5), (R6), electrolytic capacitors (C1), (C2), (C3), (C7), (C9), capacitors (C4), (C5), (C6), (C8 ), (C10), (C11).
[0011] Implement the three-phase el...
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A three-phase electrical-automatic balancing switchover single-phase electrical control circuit uses a voltage sampling detection circuit, an analysis and comparison processing circuit and a control output load circuit when single-phase electricity is input to one phase of three-phase electricity. The voltage and current of the three-phase circuit are processed through one single chip microcomputer, voltages and currents of all phases are judged to select one higher-voltage and lower-current phase for single-phase usage. A null line is electrified due to unbalance of the three-phase circuit, and accordingly the current of the null line is too high. According to a formula U=IR, the resistance of the lead line is impossibly zero, so that certain voltage is caused. Preferably, the higher-voltage and lower-current phase is used, so that balance is achieved, the null line is prevented from carrying high voltage, and the three phases are more balanced. In addition, electricity can be further saved, and meanwhile the three-phase electrical-automatic balancing switchover single-phase electrical control circuit is safer. The three-phase electrical-automatic balancing switchover single-phase electrical control circuit achieves full-automatic control and ensures that the null line is not electrified.
Description
Technical field [0001] The present invention relates to a power supply device, in particular to a three-phase power automatic balance that uses a voltage sampling detection circuit, an analysis and comparison processing circuit, and a control output load circuit when single-phase power is connected to one phase of the three-phase power. Switching single-phase electric control circuit. Background technique [0002] When the three-phase load of the three-phase power supply is asymmetrical, a large current will flow on the neutral line, because the neutral line has a certain resistance, so there will be a certain voltage at both ends of the wire, which will also cause electric shock ACCIDENT. For example, if the lamp bulb in the workshop is broken, find a new one and replace it with a new one. If you replace the bulb when the three-phase load in the workshop is asymmetrical, you will get an electric shock if you accidentally touch the neutral wire, even if the live wire switch...
Claims
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IPC IPC(8): H02M5/32
CPCH02M5/32
Inventor 陈力维
Owner 陈力维