A High Reliability and High Efficiency Control Driver Based on Three-level Topology
A drive, three-level technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problem that the control drive can only stop, affect the efficiency of the control drive, affect the reliability of the product, etc., to achieve easy judgment method and high function Rich, reliable effects
Active Publication Date: 2020-07-14
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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Problems solved by technology
combine figure 1 , when one IGBT switch tube fails, the control driver can only stop, which affects the reliability of the product
[0003] In recent years, there has been research on the three-level redundant topology, but it increases the number of IGBT switch tubes, increases the loss during the working process, and affects the efficiency of the control driver
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[0034] The present invention provides a high-reliability and high-efficiency control driver topology structure based on a three-level topology. The three-level driver with a T-type topology is improved, and a fault recovery loop is formed by adding switches to achieve fault recovery. reliability.
[0035] Combine figure 2 , The control driver topology includes a T-type three-phase drive bridge, 3 bus support capacitors, and six switches. The T-type three-phase drive bridge uses the existing T-type three-phase drive bridge structure to invert the DC power into AC power to drive the three-phase motor , The first bus support capacitor C1 is connected in parallel with the power supply through the first switch T15 to provide power for the T-type three-phase drive bridge structure. The second bus support capacitor C2 and the third bus support capacitor C3 are connected in series and then connected in parallel with the first bus support capacitor C1 , The second switch T13 is connected...
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The invention relates to a high-reliability and high-efficiency control driver based on a three-level topology. The driver comprises a T-type three-phase drive axle, a bus support capacitor and 6 switches. Through different logic combination of the switches, a heterogeneous circuit combination form of an original T-type circuit topology is selected so as to form a new three-phase bridge-type topology and achieve a purpose of controlling a three-phase motor. When a failure detector circuit detects a correlation fault, under different gating combinations of switch tubes, the T-type circuit topology can be switched into a traditional three-phase full-bridge circuit topology so that three-phase full-bridge control of a motor can be realized. Compared to a previous three-level redundancy topology structure, during a normal work process, by using the driver of the invention, the number of the switch tubes is not increased, fault switching is convenient, a control mode is flexible, system functions are abundant and reliability is high; and under the condition of guaranteeing low-noise performance of a system, system losses are not increased, high efficiency of the system is ensured, thereis no interference and hardware cost increases very little.
Description
Technical field [0001] The invention relates to a high-reliability and high-efficiency control driver based on a three-level topology, belonging to the field of drivers. Background technique [0002] The T-type three-level topology has the characteristics of low harmonics and high efficiency, which has a relatively obvious effect on reducing the vibration and noise during the operation of the motor, and has gradually attracted people's attention. In actual applications, the reliability is still less considered. Combine figure 1 When an IGBT switch tube fails, the control driver can only be shut down, which affects the reliability of the product. [0003] In recent years, there have been researches on the three-level redundant topology, but it has increased the number of IGBT switch tubes, increased the loss in the working process, and affected the efficiency of the control driver. How to improve the reliability of the driver without increasing the switching tube and without affec...
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IPC IPC(8): H02P27/06
CPCH02P27/06
Inventor 于洋雷鹏苑利维赵国平魏思维
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS