</a>太陽能" title="太陽能">太陽能" title="太陽能">太陽能逆變器解決方案,輸入電壓20 V到28 V,交流正弦波輸出電壓230 Vrms( 50 Hz),輸出功率1kW,效率90%,DC/DC轉換部分開關頻率100kHz,DC/AC部分開關頻率16kHz.本文介紹了離線UPS系統方框圖,PV轉換中的DC/AC轉換器方框圖以及STEVAL-ISV001V1評估板主要指標,方框圖,電路圖,材料清單和1 KW逆變器PCB元件布局圖.
In a UPS system, a DC-AC converter is always used to convert the DC power from the batteries to AC power used to supply the load. The basic scheme also includes a battery pack, a battery charger which converts AC power from the grid into DC power, and a transfer switch to supply the load from the mains or from the energy storage elements if a line voltage drop or failure occurs.
圖1.離線UPS系統方框圖
Another application where a DC-AC converter is always required is shown in the block diagram of Figure 2. In this case, the converter is part of a conversion scheme commonly used in standalone photovoltaic systems. An additional DC-DC converter operates as a battery charger while performing a maximum power point tracking algorithm (MPPT), which is necessary to maximize the energy yield from the PV array. The battery pack is always present to store energy when solar radiation is available and release it at night or during hours of low insolation.
圖2.PV轉換中的DC/AC轉換器方框圖
STEVAL-ISV001V1評估板
The STEVAL-ISV001V1 demonstration board implements a 1 kW dual stage DC-AC converter, suitable for use in battery powered uninterruptible power supplies (UPS) or photovoltaic (PV) stand alone systems. The converter is powered from a low DC input voltage varying from 20 V to 28 V and is capable of supplying up to 1 kW output power on a single phase AC load. These features are met with a dual stage conversion topology including an efficient step-up push-pull DC-DC converter, to produce a regulated high voltage DC bus, and a sinusoidal h-bridge PWM inverter to generate a 50 Hz, 230 Vrms output sine wave. Other relevant features of the propose system are high power density, high switching frequency, galvanic isolation and efficiency greater than 90% over a wide output load range.
圖3.1 KW逆變器方框圖
1 KW逆變器系統指標:
This STEVAL-ISV001V1 board implements a 1 kW dual stage DC-AC converter, suitable for use in batterypowered uninterruptible power supplies (UPS) or photovoltaic (PV) standalone systems.
The converter is fed by a low DC input voltage varying from 20 V to 28 V, and is capable of
supplying up to 1 kW of output power on a single-phase AC load. These features are possible thanks to a dual stage conversion topology that includes an efficient step-up pushpull DC-DC converter, which produces a regulated high-voltage DC bus and a sinusoidal HBridge PWM inverter to generate a 50 Hz, 230 Vrms output sine wave. Other key features of the system proposed are high power density, high switching frequency and efficiency greater than 90% over a wide output load range.
圖4.1 KW逆變器外形圖
圖5.1 KW逆變器PCB元件布局圖
圖6.1 KW逆變器電路圖
1 KW逆變器材料清單(BOM):
1kW 100kHz開關電源變壓器TX1指標(MAGNETICA制造):
1.5 mH 2.5 A電感L4指標(MAGNETICA制造)
詳情請見:
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/APPLICATION_NOTE/CD00201961.pdf
In a UPS system, a DC-AC converter is always used to convert the DC power from the batteries to AC power used to supply the load. The basic scheme also includes a battery pack, a battery charger which converts AC power from the grid into DC power, and a transfer switch to supply the load from the mains or from the energy storage elements if a line voltage drop or failure occurs.
圖1.離線UPS系統方框圖
Another application where a DC-AC converter is always required is shown in the block diagram of Figure 2. In this case, the converter is part of a conversion scheme commonly used in standalone photovoltaic systems. An additional DC-DC converter operates as a battery charger while performing a maximum power point tracking algorithm (MPPT), which is necessary to maximize the energy yield from the PV array. The battery pack is always present to store energy when solar radiation is available and release it at night or during hours of low insolation.
圖2.PV轉換中的DC/AC轉換器方框圖
STEVAL-ISV001V1評估板
The STEVAL-ISV001V1 demonstration board implements a 1 kW dual stage DC-AC converter, suitable for use in battery powered uninterruptible power supplies (UPS) or photovoltaic (PV) stand alone systems. The converter is powered from a low DC input voltage varying from 20 V to 28 V and is capable of supplying up to 1 kW output power on a single phase AC load. These features are met with a dual stage conversion topology including an efficient step-up push-pull DC-DC converter, to produce a regulated high voltage DC bus, and a sinusoidal h-bridge PWM inverter to generate a 50 Hz, 230 Vrms output sine wave. Other relevant features of the propose system are high power density, high switching frequency, galvanic isolation and efficiency greater than 90% over a wide output load range.
圖3.1 KW逆變器方框圖
1 KW逆變器系統指標:
This STEVAL-ISV001V1 board implements a 1 kW dual stage DC-AC converter, suitable for use in batterypowered uninterruptible power supplies (UPS) or photovoltaic (PV) standalone systems.
The converter is fed by a low DC input voltage varying from 20 V to 28 V, and is capable of
supplying up to 1 kW of output power on a single-phase AC load. These features are possible thanks to a dual stage conversion topology that includes an efficient step-up pushpull DC-DC converter, which produces a regulated high-voltage DC bus and a sinusoidal HBridge PWM inverter to generate a 50 Hz, 230 Vrms output sine wave. Other key features of the system proposed are high power density, high switching frequency and efficiency greater than 90% over a wide output load range.
圖4.1 KW逆變器外形圖
圖5.1 KW逆變器PCB元件布局圖
圖6.1 KW逆變器電路圖
1 KW逆變器材料清單(BOM):
1kW 100kHz開關電源變壓器TX1指標(MAGNETICA制造):
1.5 mH 2.5 A電感L4指標(MAGNETICA制造)
詳情請見:
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/APPLICATION_NOTE/CD00201961.pdf
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