Common Types Of Inverters

1. Small and Medium Power
Small and medium-sized power inverters are one of the important links in household independent AC photovoltaic systems, and their reliability and efficiency are crucial for promoting photovoltaic systems, effectively using energy, and reducing system costs? Therefore, photovoltaic experts from various countries have been working hard to develop inverter power sources suitable for household use, in order to promote the better and faster development of the industry.
2. Multiple series type
The application of multiple series inverters in electric vehicles has many advantages. The series structure greatly increases the variety of output voltage vectors, enhancing the flexibility of control and improving the accuracy of control; At the same time, it reduces the fluctuation of the neutral point voltage of the motor. The bypass feature of the inverter can improve the flexibility of charging and regenerative braking control.
With people's increasing concern for the urban environment, the development of electric vehicles has received a rare opportunity. In urban transportation, electric buses have become a priority for development due to their large load capacity and high comprehensive benefits. Most electric buses use three-phase AC motors. Due to the high power of the motor, the components in the three-phase inverter need to withstand high voltage and current stress. The high dv/dt also causes severe electromagnetic radiation and requires good heat dissipation.
The high-power inverter with multiple series structures reduces the voltage stress borne by a single device and reduces the requirements for the device; Reduced dv/dt values, reduced electromagnetic radiation, and greatly reduced device heating; Due to the increased variety of output levels, the control performance is better.
Multiple series inverters are suitable for high-power electric vehicle drive systems. Adopting a multiple series connection structure can reduce the danger caused by multiple batteries being connected in series, reduce the switching stress of the device, and reduce electromagnetic radiation. But the number of batteries required has doubled.
The variety of output voltage vectors in the multi series structure is greatly increased, thereby enhancing the flexibility of control and improving the accuracy of control; Simultaneously reduce the fluctuation of motor neutral point voltage. To maintain the balance of battery power in each group, it is necessary to ensure that the discharge time of the batteries is consistent during operation. By bypass, the battery pack can be flexibly charged and the torque of regenerative braking can be controlled.