V2G isolation-type charger integration method based on open winding motor
An integrated method and open-winding technology, applied in electric vehicle charging technology, motors, charging stations, etc., can solve the problems of motor derating, additional passive components, and many switching switches, and achieve the effect of reducing hardware costs.
Active Publication Date: 2021-07-30
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology
The integrated drive topology is fault-tolerant, but the motor is derated
In addition, this solution has problems such as the need for additional passive components, more switches, and one-way flow of energy.
Method used
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Embodiment Construction
[0042] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0043] like Figure 1-5 As shown, a V2G isolated charger integration method based on an open-winding motor, its circuit structure includes the first to seventh H-bridge converters, the first to third three-phase motor windings, the first to third thin film filter Capacitor and magnetic combination high-frequency transformer, the two ends of the first electrolytic filter capacitor are respectively connected to the positive pole and the negative pole of the storage battery; it is characterized in that it also includes the first to sixth switching switches;
[0044] The A-phase output of the power grid is connected to the first switch input first end;
[0045] The B-phase output of the power grid is connected to the second input terminal of the first transfer switch;
[0046] The C-phase output of the power grid is connected to the third input terminal of the first tra...
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The invention discloses a V2G isolation-type charger integration method based on an open winding motor. According to the integration method, the open winding motor is used as a filter inductor of a charger, six change-over switches are arranged, two working modes of charging and driving are achieved through on-off of the six change-over switches, and due to the fact that all power devices are full-control devices, bidirectional flow of energy can be achieved. Compared with the prior art, the integration method only needs to add fewer change-over switches, a motor driving system divides each phase of a three-phase winding into two parts, open winding operation is adopted in the driving mode, and two windings of each phase are connected in parallel to serve as a filter inductor in the charging mode. The isolation-type charger can realize bidirectional transmission of V2G energy.
Description
technical field [0001] The invention relates to the field of charging and driving integration systems for medium and high-power electric vehicles, in particular to a V2G isolated charger integration based on an open-winding motor. Background technique [0002] Since the on-board charger is installed on the electric vehicle, not only the volume and weight of the electric vehicle are increased, but also the cost of the entire electric vehicle is increased. In order to solve this problem, integration technology is introduced. At present, according to whether the integrated charger has electrical isolation, it is divided into two categories: chargers with isolation transformers and chargers without isolation transformers. For medium and high power electric buses, the charging device must have electrical isolation in consideration of electrical safety. [0003] At present, there are two integrated solutions with isolation transformers: the first one, such as figure 1 As shown,...
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IPC IPC(8): B60L53/20B60L55/00H02J3/32H02P25/18H02P27/06H02M7/5387
CPCB60L53/20B60L55/00H02J3/322H02P25/18H02P27/06H02M7/5387H02J2310/48Y02T10/64Y02T10/70Y02T10/7072Y02T90/14
Inventor 李春杰陈心雨李洪美赵明伟马红建柴艳莉闫俊荣
Owner XUZHOU NORMAL UNIVERSITY