A DC slow start device and method
A slow-start, DC power technology, applied in electric vehicles, transportation and packaging, electric vehicle charging technology, etc., can solve the problems of low system reliability and large manual misoperation
Active Publication Date: 2021-08-10
KEHUA DATA CO LTD +1
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Problems solved by technology
This method is always completed by manual operation, the system reliability is low, and the possibility of manual misoperation is high
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[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0034] The embodiment of the present invention discloses a DC slow start device, see figure 1 As shown, it includes a first switch S1, a buffer unit including a series connected second switch S2 and a buffer resistor R, and a mechanical striker P;
[0035] Wherein, the first switch S1 is connected to a bus bar and a DC power supply, and the buffer unit is connected in parallel with the first switch S1;
[0036] In addition, the second switch S2 and the snubbe...
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The present application discloses a DC slow start device and method, including a first switch, a buffer unit including a second switch in series and a buffer resistor, and a mechanical striker; wherein, the first switch is connected to a bus bar and a DC power supply, and the buffer The unit is connected in parallel with the first switch; the mechanical striker is specifically used to extend and lock when the voltage difference between the bus bar and the DC power supply is greater than a preset value, so as to prevent the first switch from being closed. contraction when the voltage difference is less than or equal to the preset value, so as to allow the first switch to be closed. The present invention proposes a mechanical striker-electrical equipment interlocking device, which locks the first switch at a lower cost and avoids affecting the entire system by closing the first switch in advance. The application of the invention can avoid the influence of misoperation on the system, improve system reliability, reduce system design cost, reduce maintenance cost and time caused by damage, and improve system economic benefit.
Description
technical field [0001] The invention relates to the field of wireless charging of electric vehicles, in particular to a DC slow start device and method. Background technique [0002] In the prior art, when the inverter is started in a DC cold state, the voltage of the electrolytic capacitor of the bus bar is almost zero. At this time, if the switch S1 between the DC input terminal and the bus bar is directly closed, a large inrush current will be generated, which is harmful to the The fuse F and the electrolytic capacitor are irreversibly damaged, and may also affect the power supply of the DC input terminal. Therefore, the DC cold start requires a slow start step. In the case of DC input power supply, first close the switch S2, and the DC power passes through the switch S2, Resistor R charges the bus capacitor. When the difference between the electrolytic capacitor voltage and the DC input voltage is less than 10V, switch S1 is closed and S2 is disconnected. As long as the...
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IPC IPC(8): B60L53/12
CPCB60L53/12Y02T10/70Y02T10/7072Y02T90/14
Inventor 苏先进陆佩芳洪开慧方福春苏志伟倪丹张远忠王思聪赵厚钦邵俊云张永鑫周思岑
Owner KEHUA DATA CO LTD