The centralized control parallel scheme of inverters is an earlier proposed scheme. In this scheme, the parallel control module detects the frequency and phase of the commercial power supply, and gives a synchronization signal to each inverter at the same time. When the mains power fails, the phase-locked loop circuit of each inverter ensures that the frequency and phase of the output voltage are consistent. The parallel control module also detects the load current and divides it by the number of inverters participating in parallel as the current reference command for each inverter. At the same time, each inverter detects its own output current, and calculates the error with the average current to compensate the reference voltage command and eliminate the circulating current.
The centralized control parallel scheme is simple to implement, and the current sharing effect is good, but it does not achieve true redundancy. Once the parallel controller fails, the entire system will collapse and the reliability will be greatly reduced.
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Safety issues to consider in inverter design 1. Products with metal casing must be selected: Vehicle-mounted inverters generate large amounts of heat due to their large power. If the internal heat cannot be dissipated in time, the life of the components will be affected at best, and there is a risk of fire at worst. The metal shell has good heat dissipation properties on the one…
1. According to the spectrum division table formulated by the Institute of Electrical and Electronics Engineers (IEEE), the low-frequency frequency is 30~300kHz, the medium-frequency frequency is 300~3000kHz, the high-frequency frequency is 3~30MHz, and the frequency range of 30~300MHz is very high frequency. , 300~1000MHz is ultra-high frequency. Compared with low-frequency signals, high-frequency signals change very quickly and have sudden changes; low-frequency signals change slowly and have…
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Safety issues to consider in inverter design 1. Products with metal casing must be selected: Vehicle-mounted inverters generate large amounts of heat due to their large power. If the internal heat cannot be dissipated in time, the life of the components will be affected at best, and there is a risk of fire at worst. The metal shell has good heat dissipation properties on the one…
1. According to the spectrum division table formulated by the Institute of Electrical and Electronics Engineers (IEEE), the low-frequency frequency is 30~300kHz, the medium-frequency frequency is 300~3000kHz, the high-frequency frequency is 3~30MHz, and the frequency range of 30~300MHz is very high frequency. , 300~1000MHz is ultra-high frequency. Compared with low-frequency signals, high-frequency signals change very quickly and have sudden changes; low-frequency signals change slowly and have…
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High-frequency inverter electrical appliances are a kind of switching equipment used in the industrial field. What is the working principle of high-frequency inverters? This equipment is controlled by program logic. High frequency inverter can be used in the telecommunications industry and is a switching device in computer rooms. This kind of power supply can be used in the solar energy industry and power generation industry. It…
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