High-voltage direct-current power source energy bleed-off control circuit with failure feedback function
A high-voltage DC power supply and energy discharge technology, applied in the direction of electrical components, output power conversion devices, etc., can solve problems such as potential safety hazards, and achieve the effects of ensuring safe and reliable work, reducing component costs, and avoiding heating and burning
Pending Publication Date: 2018-01-19
上海鼎充新能源技术有限公司
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to solve the potential safety hazards caused by the lack of state detection feedback signal in the current high-voltage DC discharge circuit, and improve the reliability of the output voltage discharge of the DC charging pile, the invention provides an improved discharge circuit controlled by the traditional IGBT The high-voltage DC energy discharge control circuit with failure feedback adds a failure feedback detection part to realize closed-loop control, which can not only control the discharge circuit, but also avoid the risk of burning the discharge resistor due to failure of key components
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The invention discloses a high-voltage DC power supply energy discharge control circuit with failure feedback applied to electric vehicle charging piles.
[0020] Existing electric vehicle charging piles such as figure 2 As shown, it includes a charging control unit 1 , a discharge circuit 2 , a DC power supply module 3 , and a contactor 4 , and an electric vehicle 5 to be charged is connected to the output end of the contactor 4 .
[0021] The DC power module 3 , the contactor 4 and the electric vehicle 5 are sequentially connected in series to form a charging circuit, and the input end of the DC power module 3 is connected to the power grid. The DC power module 3 converts the three-phase power from the grid into a DC voltage that can be used to charge the electric vehicle 5. The function of the contactor 4 is to disconnect the DC power module 3 and the electric vehicle 5 at any time, and protect the electric vehicle during abnormal charging. 5 from charging damage. ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a high-voltage direct-current power source energy bleed-off control circuit with a failure feedback function, and relates to a bleed-off circuit. The circuit comprises resistors R9, R10, R11, R12 and R13, a bleeder resistor R14, a direct-current power source VDD, a voltage-stabilizing diode Q1, a triode V2, a photoelectric coupler U1, a resistor string X1, an IGBT module V1and a current transformer T1. Compared with the scheme that a high-voltage relay is utilized, the cost of elements in the design is reduced, and meanwhile, the space occupied by the elements is reduced. According to the circuit, the function required in the safety standard that the voltage of a power supply interface is reduced to 60 VDC or below within one second after a charging connector is switched off is well achieved. Compared with the scheme that a one-way isolation low-voltage direct-current power source is used for driving a high-voltage IGBT to control the on-off state of a bleederresistor loop, a line with the failure feedback function is utilized, and whether the elements lose efficacy or not is judged according to a charging signal sent by a CPU control unit and a received signal of the current transformer.
Description
technical field [0001] The invention relates to a discharge circuit, in particular to a high voltage DC power supply energy discharge control circuit with failure feedback. Background technique [0002] The standard "GBT18487.1-2015 General Requirements for Charging Systems" in the DC charging pile clearly requires that the charging pile has a discharge circuit to ensure that the voltage of the power supply interface drops below 60VDC within 1S after the charging connector is disconnected. [0003] At present, the accidents of the discharge power resistor burning due to the unreasonable design of the discharge circuit frequently occur in the market. At present, there are two types of high-voltage DC power supply energy discharge circuits that have been applied to DC charging piles in the mainstream. One is to use an isolated low-voltage DC power supply to drive a high-voltage IGBT to control the on-off of the discharge resistor circuit. An additional DC voltage is required. ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/32
Inventor 黄戬陈建华田绍民陈盼王相云田树春夏建中吕鸿
Owner 上海鼎充新能源技术有限公司