Dual-motor and eight-switch inverter driving system and control method thereof
A drive system, eight-switch technology, applied in the direction of motor control, multiple motor speed/torque control, control system, etc., can solve the problems of large power consumption, many components, and high cost
Active Publication Date: 2018-05-29
天津天海轮毂电机科技有限公司
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[0003] With the optimization of the body design and control algorithm of the permanent magnet synchronous motor, traditionally, the dual permanent magnet synchronous motor is controlled and driven by a twelve-switch inverter, which requires many devices, high power consumption, and high cost
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[0044] The present invention is described in further detail below in conjunction with accompanying drawing:
[0045] Such as Figure 1 to Figure 3 As shown, a dual-motor eight-switch inverter drive system includes a three-phase permanent magnet synchronous motor M1, a three-phase permanent magnet synchronous motor M2, a three-phase eight-switch inverter, a speed comparator and a PI controller connected in sequence , reference current generator, current comparator, current function module, hysteresis controller and PWM pulse generating unit;
[0046] The three-phase eight-switch inverter includes three bridge arms connected in parallel and connected to the same DC power supply. Two of the bridge arms are composed of three power switches in series, and the other bridge arm is composed of two power switches in series. Three-phase eight-switch The two adjacent power switches in each bridge arm of the inverter are an intermediate node, and the two armature windings of the three-ph...
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The invention discloses a dual-motor and eight-switch inverter driving system and a control method thereof. The dual-motor and eight-switch inverter driving system comprises three inverter bridge armsand two permanent-magnet synchronous motors, wherein the three inverter bridge arms comprise eight power switch tubes, the three inverter bridge arms are connected in parallel and then are connectedwith a public DC power supply, three-phase armature windings of the two permanent-magnet synchronous motors are connected to a bridge arm of a three-phase inverter according to control requirement, apower switch state of a three-phase eight-switch inverter is given out by a pulse width modulation (PWM) generation unit, and rapid reconstruction of different circuit topologies can be achieved by the three-phase eight-switch inverter according to an output signal of the PWM generation unit. By control of the dual-motor and eight-switch inverter, the power switches are reduced on the premise thatthe two permanent-magnet synchronous motors are enabled to synchronously run according to the working requirement, and the power consumption of the inverter driving system is reduced; and meanwhile,the two permanent-magnet synchronous motors are completely consistent in working property during synchronous running, the circuit structure of the inverter motor control system is simplified, the system stability is improved, and the economic cost is reduced.
Description
technical field [0001] The invention belongs to the field of permanent magnet synchronous motor system control, and in particular relates to a dual-motor eight-switch inverter drive system and a control method thereof. Background technique [0002] Permanent magnet synchronous motor (PMSM) is a synchronous motor that generates a synchronous rotating magnetic field by permanent magnet excitation. It has the characteristics of high power efficiency, high power factor, low heat generation, large allowable overload current, and high reliability; multi-phase motor drive system It has the characteristics of low voltage, high power output, high power density, small torque fluctuation, and stable operation. Therefore, the multi-motor drive system and its control method have always been concerned by people, and it is hoped that a method to optimize it can be obtained. [0003] With the optimization of the body design and control algorithm of the permanent magnet synchronous motor, tr...
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IPC IPC(8): H02P6/04H02P6/17
CPCH02P6/04H02P6/17H02P2207/05
Inventor 林海石伟闫茂德巩建英龚贤武陈俊硕李耀华周熙炜陈金平司利云
Owner 天津天海轮毂电机科技有限公司