Over modulation method and system for three level space vector
A space vector, three-level technology, applied in the field of AC drive, can solve the problems of many system resources, limited algorithm accuracy, and cumbersome implementation steps.
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[0089] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0090] In order to facilitate those skilled in the art to better implement the present invention, the working principle of the three-level inverter is briefly introduced first. see image 3 , is the main circuit topology diagram of a typical diode neutral point clamped three-level inverter.
[0091] Such as image 3 As shown, each bridge arm of the inverter output of the diode neutral point clamped (NPC: Neutral Point Clamped) three-level inverter is composed of V 1 ~V 4 It consists of four turn-off power devices. By controlling each phase power device V 1 ~V 4 The turn-on and turn-off of each phase, and under the condition that at most two adjacent power devices of each phase are turned on at any time, each phase can obtain thre...
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