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Pure sine wave inverter with MPPT controller manufacturer will show you how to improve inverter efficiency

Pure sine wave inverter with MPPT controller manufacturer will show you how to improve inverter efficiency

  • Categories:Industry news
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  • Time of issue:2022-09-06
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(Summary description)The manufacturer of pure sine wave inverter with MPPT controller tells you that there are currently three technical routes: one is to use control methods such as space vector pulse width modulation to reduce losses.

Pure sine wave inverter with MPPT controller manufacturer will show you how to improve inverter efficiency

(Summary description)The manufacturer of pure sine wave inverter with MPPT controller tells you that there are currently three technical routes: one is to use control methods such as space vector pulse width modulation to reduce losses.

  • Categories:Industry news
  • Author:
  • Origin:
  • Time of issue:2022-09-06
  • Views:0
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The manufacturer of pure sine wave inverter with MPPT controller tells you that there are currently three technical routes: one is to use control methods such as space vector pulse width modulation to reduce losses; the other is to use silicon carbide components to reduce the internal resistance of power devices; Using three-level, five-level and other multi-level electrical topologies and soft switching technology, the voltage across the power device is reduced, and the switching frequency of the power device is reduced.

Cheapest pure sine wave inverter with MPPT controller supplier(s) china
1. Voltage space vector pulse width modulation
The pure sine wave inverter with MPPT controller manufacturer tells you that it is an all-digital control method, which has the advantages of high DC voltage utilization and easy control, and is widely used in inverters. The utilization rate of DC voltage is high, and a lower DC bus voltage can be used under the same output voltage, thereby reducing the voltage stress of the power switching device, reducing the switching loss on the device, and improving the conversion efficiency of the inverter. improvement. In the space vector synthesis, there are a variety of vector sequence combination methods. Through different combinations and sorting, the effect of reducing the switching times of the power device can be obtained, thereby further reducing the switching loss of the inverter power device.
2. Components using silicon carbide materials
The manufacturer of pure sine wave inverter with MPPT controller tells you that the impedance per unit area of ​​silicon carbide devices is only one percent of that of silicon devices. For power devices such as IGBTs made of silicon carbide materials, the on-state impedance is reduced to ten times that of ordinary silicon devices. One part, silicon carbide technology can effectively reduce the diode reverse recovery current, thereby reducing the switching loss on the power device, and the current capacity required by the main switch can also be reduced accordingly. Therefore, the silicon carbide diode is used as the main switch. Anti-parallel diodes are a way to improve inverter efficiency. Compared with the traditional fast recovery silicon anti-parallel diode, after adopting the silicon carbide anti-parallel diode, the diode reverse recovery current is significantly reduced, and the total conversion efficiency can be improved by 1%. After adopting the fast IGBT, the conversion efficiency of the whole machine can be improved by 2% due to the accelerated switching speed. When combining SiC inverse parallel diodes with fast IGBTs, the efficiency of the inverter will be further improved.
3. Soft switching and multi-level technology
The pure sine wave inverter with MPPT controller manufacturer tells you that the soft switching technology uses the resonance principle to make the current or voltage in the switching device change according to a sinusoidal or quasi-sinusoidal law. When the current naturally crosses zero, the device is turned off; when the voltage naturally crosses zero , turn on the device. Thereby, the switching loss is reduced, and at the same time, the problems of inductive turn-off and capacitive turn-on are greatly solved. When the voltage across the switch tube or the current flowing through the switch tube is zero, it is turned on or off, so that there is no switching loss in the switch tube. The three-level inverter topology is mainly used in high-voltage and high-power applications. Compared with the traditional two-level structure, the three-level inverter output increases the zero level, and the voltage stress of the power device is halved. The manufacturer of pure sine wave inverter with MPPT controller tells you that because of this advantage, under the same switching frequency, the three-level inverter can use a smaller output filter inductance than the two-level structure, and the inductance loss, cost and volume can be effective. Under the same output harmonic content, the three-level inverter can use a lower switching frequency than the two-level structure, the switching loss of the device is smaller, and the conversion efficiency of the inverter is improved.

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