Control method, device, drive system and storage medium of three-phase inverter
A technology of three-phase inverter and control method, which is applied in the direction of control system, AC motor control, electrical components, etc., and can solve the problem of deviation from the set output power, etc.
Active Publication Date: 2020-07-07
QINGDAO HAIER SMART TECH R & D CO LTD +1
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Problems solved by technology
Due to the lack of large-capacity smoothing capacitors on the bus of the PMSM drive system without electrolytic capacitors, the DC bus voltage output by the unidirectional rectifier bridge will periodically pulsate, causing the control method of Space Vector Pulse Width Modulation SVPWM (SpaceVectorPulseWidthModulation) to enter periodically overmodulation area
[0003] The current overmodulation control method changes the actual output power of the inverter, making the actual output power deviate from the set output power
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[0052]The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. Herein, various embodiments may be referred to individually or collectively by the term "invention", which is for convenience only and is not intended to automatically limit the scope of this application if in fact more than one invention is disclosed. A single invention or inventive concept. Herein, relational terms such as first and second etc. are used only to distinguish one entity or operation from another witho...
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An embodiment of the invention discloses a method for controlling a three-phase inverter, and belongs to the technical field of motor driving. The control method is applied in an overmodulation process of a controller of a three-phase inverter, and the method comprises: according to a first set voltage equivalent section of a first section of a SVPWM regular hexagon, a set output voltage vector, and a set output current vector direction, determining an equivalent voltage vector end point in the first set voltage equivalent section of the first section of the SVPWM regular hexagon; and according to the equivalent voltage vector end point, adjusting input pulse of the three-phase inverter. Using the technical scheme, when the SVPWM is in an overmodulated manner, actual output power of the three-phase inverter would not deviate from the set output power. Embodiments of the invention also disclose a control device of the three-phase inverter, a driving system, and a storage medium.
Description
technical field [0001] The invention relates to the technical field of motor drive, in particular to a control method, device, drive system and storage medium of a three-phase inverter. Background technique [0002] The PMSM (Permanent Magnet Synchronous Motor) drive system without electrolytic capacitors has less energy storage in the DC bus, and the output power of the inverter can affect the input power of the grid side. Therefore, controlling the output power of the inverter can indirectly improve the current waveform of the grid side. Due to the lack of large-capacity smoothing capacitors on the bus of the PMSM drive system without electrolytic capacitors, the DC bus voltage output by the unidirectional rectifier bridge will periodically pulsate, causing the control method of Space Vector Pulse Width Modulation SVPWM (SpaceVectorPulseWidthModulation) to enter periodically overmodulation area. [0003] The current overmodulation control method changes the actual output ...
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IPC IPC(8): H02P27/12
CPCH02P27/12
Inventor 王堃许升虞朝丰谢军宋洪强徐文冰高山吴远刚
Owner QINGDAO HAIER SMART TECH R & D CO LTD