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WORKING PRINCIPLE OF INVERTERS
- The direct current is smoothed and filtered by a filter circuit.
- The inverter uses semiconductor devices as switching components to adjust the voltage, frequency and waveform of the output alternating current by controlling the switching state and frequency.
- Pulse width modulation (PWM) technology controls the on-time of the switching element so that the output AC is close to the desired waveform (such as a pure sinusoidal waveform).
- The output AC passes through the output filter circuit for further filtering and noise removal.
- The control circuit includes protection functions such as overload, short circuit and overheat protection to ensure the safety of the inverter and equipment.
MODLE:EL-IO（300W to 8KW）
MODLE:EL-IW（500W to 15KW）
MODLE:EL-IWH（1KW to 5KW）
MODLE:EL-DHW（5KW to 6KW）
MODLE:EL-IG（6KW to 30KW）
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What Are The Common Functions Of Inverters?
Pure Sine Wave Inverter (Pure Sine Wave Inverter) : This inverter is capable of producing a near-perfect sinusoidal waveform output, suitable for high power quality applications, such as precision electronics and sensitive motor drives.
Modified Sine Wave Inverter (Modified Sine Wave Inverter) : This inverter output waveform is approximated in some way, the waveform is not as smooth as pure sine wave, but is suitable for the use of most common electrical appliances.
Square Wave Inverter (Square Wave Inverter) : This inverter output waveform is square wave, often used in some low-power, simple applications, such as lighting and power tools.
Pulse Width Modulation Inverter: This inverter uses pulse width modulation technology to control the shape and amplitude of the output waveform by adjusting the on-time of the switching element. It can produce an output close to a pure sine wave, while having high efficiency.
Difference Between Power Frequency Inverter And High Frequency Inverter
Power frequency inverter: Power frequency inverter refers to the output frequency and input grid frequency of the same inverter, usually input grid frequency of 50Hz or 60Hz. The power frequency inverter converts DC power into AC power, and the output AC power frequency is consistent with the input power grid frequency. This inverter is mainly used in power systems to convert direct current to alternating current to meet industrial and civil power needs.
High-frequency inverter: High-frequency inverter refers to the output frequency is higher than the input power frequency of the inverter. It works by converting DC power to high-frequency AC power, which is then converted to the desired output voltage through a transformer. High-frequency inverters typically have higher switching frequencies, allowing for higher power density and higher efficiency. Such inverters are commonly used in applications such as electronic devices, solar power systems, electric vehicles and UPS (uninterruptible power supply).
Difference Between Off-Grid Inverters And Grid-Connected Inverters
Connected to the grid: off-grid inverters are used for independent off-grid systems, not connected to the main grid. Grid-connected inverters are used to connect the energy of renewable energy systems (such as solar photovoltaic systems) to the main grid, and can inject excess energy into the grid or obtain electricity from the grid
System design purpose: Off-grid inverters are designed to provide an independent power system that does not depend on the main grid for power supply. Grid-connected inverters are designed to connect renewable energy systems to the main grid so that electrical energy can be interconnected and shared
Control strategy: Off-grid inverters usually need to control the output of electrical energy according to the battery voltage and load requirements to maintain the stable operation of the off-grid system. Grid-tied inverters need to be controlled in accordance with the requirements of the electrical grid to ensure coordinated operation, which includes monitoring and adjusting parameters such as voltage, frequency, and power factor.
Safety requirements: Grid-connected inverters need to meet the safety specifications and standards for grid access to ensure that the stability and security of the grid will not be negatively affected when connected to the grid. Off-grid inverters focus more on battery management and self-sufficiency to ensure a reliable power supply when operating off-grid.
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What Should I Pay Attention To When Installing The Inverter?
- Installation location selection: Select a well-ventilated, dry, dust-free, non-corrosive gas and appropriate temperature place for installation. Avoid direct sunlight, high temperatures, and humid places.
- Mounting bracket: The inverter usually needs to be installed on the wall or bracket to ensure that the bracket is stable and reliable and can withstand the weight of the inverter.
- Installation space requirements: The inverter needs a certain space to dissipate heat, ensure that there is no blockage around the installation, and maintain a certain air circulation.
- Grounding protection: The inverter must be properly grounded to ensure safe operation. The ground cable should be in reliable contact with the ground and comply with local electrical safety standards.
- Power connection: Before connecting the power supply, ensure that the power switch of the inverter is off. Ensure that the power cables are properly insulated to avoid short circuit and electric shock.
- Dc input connection: If the inverter is used in a solar panel system, ensure that the positive and negative terminals of the panel are properly connected. Pay attention to polarity to avoid connection errors.
- Ac output connection: Connect the inverter’s AC output to the power system, ensuring that it is properly connected to the main power supply or switchboard. Connect according to local electrical safety standards.
- Temperature protection: Inverters usually have an overheat protection function, but it is still necessary to pay attention to the operating temperature range of the inverter. Do not allow the inverter to overheat and ensure that the ambient temperature is appropriate.
- Safe operation: When installing and operating an inverter, comply with the relevant safety regulations and operation guidelines. If you are unsure of the procedure or installation requirements, it is best to consult a professional or technical support.
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