Auxiliary converter with multiple protections
An auxiliary converter and multiple protection technology, applied in the electronic field, can solve the problems of auxiliary converter lacking protection circuit, high failure rate, and increasing locomotive operating costs, so as to reduce maintenance and operation costs, reduce failure rate, and avoid damage effect
Active Publication Date: 2017-11-21
CRRC YONGJI ELECTRIC CO LTD
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Problems solved by technology
[0005] The invention provides an auxiliary converter with multiple protections, which is used to solve the problems of lack of protection circuit in the existing auxiliary converter, high failure rate, and increased operating cost of the locomotive
Method used
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Embodiment Construction
[0014] figure 1 It is a schematic structural diagram of Embodiment 1 of a converter with multiple protections provided by the present invention. Such as figure 1 As shown, the converter 10 with multiple protections includes: a first protection circuit 100 , an inverter circuit 110 , a second protection circuit 120 and a control circuit 130 .
[0015] Wherein, the first protection circuit 100, the inverter circuit 110 and the second protection circuit 120 are connected in sequence, and are respectively connected to the control circuit 130; the first protection circuit 100 includes a first switch 101, a first resistor 102 and the second resistor 103. One end of the first switch 101 and the first resistor 102 are respectively connected to the input end of the DC voltage, the other end of the first resistor 102 is connected to one end of the second resistor 103, and the other end of the second resistor 103 One end and the other end of the first switch 101 are respectively conne...
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An auxiliary converter having multi-protection comprises a first protection circuit (100), an inverter circuit (110), a second protection circuit (120) and a control circuit (130). The first protection circuit (100), the inverter circuit (110) and the second protection circuit (120) are sequentially connected, and are respectively connected to the control circuit (130). The first protection circuit (100) comprises a first switch (101), a first resistor (102) and a second resistor (103). One end of each of the first switch (101) and the first resistor (102) is connected to a direct-current voltage input end, and the other end of the first resistor (102) is connected to one end of the second resistor (103). The other end of the second resistor (103) and the other end of the first switch (101) are respectively connected to a positive input end of the inverter circuit (110). A control end of the first switch (101) is connected to the control circuit (130). The auxiliary converter effectively protects and controls an input voltage and an output voltage of an inverter circuit and controls an input current of the inverter circuit, thus effectively avoiding a damage of a large pre-charge current, greatly reducing a fault rate of the auxiliary converter and reducing a locomotive maintenance and operation cost.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to an auxiliary converter with multiple protections. Background technique [0002] The auxiliary converter on the high-speed EMU is to invert the 3000-volt (V) direct current in the middle link of the traction converter into a three-phase 380V, 50 Hz (Hz) alternating current and supply it to the air-conditioning compressor and ventilation on the high-speed EMU. Equipment, air compressors and chargers and other power electronic equipment for power supply. Auxiliary converters are the main power supply equipment on high-speed EMUs, which are related to the operation performance of high-speed EMUs, requiring high power supply and high reliability. [0003] The existing auxiliary converter circuit mainly includes: a step-down chopper circuit, a high-frequency transformer, a rectifier circuit and an inverter circuit. Among them, the step-down chopper circuit inverts the high-voltag...
Claims
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IPC IPC(8): H02M1/32
CPCH02M1/32
Inventor 姬惠刚张桂成高永军武彩生朱剑波唐子辉刘峰东蒋学君丁巧娅宜雷
Owner CRRC YONGJI ELECTRIC CO LTD