Five-phase inverter dual-phase motor system drive circuit and direct torque control method
A technology of direct torque control and five-phase inverter, which is applied in motor generator control, AC motor control, electronically commutated motor control, etc. It can solve the problems of complex calculation process and difficulty in quick response, and achieve robustness Strong, simple structure, fast response effect
Active Publication Date: 2020-12-29
CHANGAN UNIV
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According to the magnitude of the torque error, the product of the magnitude of the flux linkage error and the deviation coefficient, the respective system errors of the two three-phase motors are calculated, and the dual three-phase motor bridge can only be determined after comparing the system errors of the two three-phase motors. The actual switch state of the arm, the calculation process of this method is complicated, and it is difficult to respond quickly
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[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0029] see figure 1 , the five-phase inverter dual three-phase motor system of the present invention includes the first, second, third, fourth, and fifth inverter bridge arms L1, L2, L3, L4, L5 and the first star-shaped winding three-phase motor M1, The second star-shaped winding three-phase motor M2; the first, second, third, fourth, and fifth inverter bridge arms L1, L2, L3, L4, and L5 are connected in parallel and connected to the public DC power supply; wherein, the first inverter The bridge arm L1, the second inverter bridge arm L2, the fourth inverter bridge arm L4 and the fifth inverter bridge arm L5 are independent bridge arms, and the centers of the bridge arms are respectively connected to the first star winding three-phase motor M1 The two-phase winding A1, B1 of the two-phase winding A2, B2 of the three-phase motor M2 of the second star winding; ...
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A five-phase inverter dual-three-phase motor system drive circuit and direct torque control method, the system drive circuit includes two star-shaped winding three-phase motors, a five-leg inverter, a speed adjustment module, a PI regulator, Torque calculation module, torque regulation module, hysteresis controller and switch state selection table. The control method adopts the torque hysteresis control method. The torque error between the given torque and the actual torque is obtained after passing through the torque adjustment module. The torque adjustment module connects the switch state selection table through the hysteresis controller and obtains the two motors Inverter PWM pulse width modulation signal. The invention inherits the advantages of simple structure and strong robustness of the three-phase direct torque control method. The optimized direct torque control method improves the control accuracy and speeds up the response speed, and realizes high precision and high precision for dual three-phase motors. Fast response control, suitable for various five-phase inverter dual three-phase motor systems.
Description
technical field [0001] The invention belongs to the field of motor control, and relates to a drive circuit for a five-phase inverter dual-three-phase motor system and a direct torque control method. Background technique [0002] In recent years, with the rapid development of industries such as textiles, papermaking, steel rolling and rail transit, the optimization of multi-motor drive systems and their control methods has attracted the attention of many scholars. In a general multi-motor drive system, each three-phase motor is independently controlled by a three-phase inverter. Therefore, in order to reduce the number of switching devices used, experts proposed a new multi-motor drive control structure based on multi-phase inverters. For example, adopt five-phase inverter to control the basic structure of the system at the same time. [0003] At the same time, a new AC speed regulation technology -------- direct torque control technology (DTC) has also been born in the fie...
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IPC IPC(8): H02P21/30H02P25/22H02P27/12
CPCH02P25/22H02P27/12H02P21/30
Inventor 林海陈宇巩建英陈俊硕李耀华周熙炜陈金平龚贤武司利云
Owner CHANGAN UNIV