Controllable resistance output device, method thereof and application
A technology of an output device and an output method, which is applied in the direction of testing circuits, testing dielectric strength, etc., can solve the problems of non-intelligence, low efficiency of the detection process, and cumbersome replacement process of multiple insulation resistances, etc., and achieves simple structure and improved insulation detection. efficiency effect
Inactive Publication Date: 2015-05-06
HUIZHOU EPOWER ELECTRONICS
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Problems solved by technology
However, because the total rated voltage of the battery system of different electric vehicles is different, in the process of testing, it is usually necessary to replace several insulation resistors with different resistance values to detect different insulation levels of electric vehicles. Intelligent, making the detection process inefficient
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Embodiment 1
[0028] The invention provides a resistance output device with controllable resistance, which includes a host computer, a slave computer, a first switching device, a second switching device and a resistor array; wherein, the host computer is used to input resistance and send instructions to all The lower computer; the lower computer receives instructions from the upper computer, and controls the on and off states of the first switching device and the second switching device according to the instructions. A resistor array, comprising a plurality of insulation resistors connected in series between the positive output terminal of the resistor and the negative output terminal of the resistor; a first switch device is connected in parallel at both ends of each insulation resistor; and each insulation resistor is connected in series through a second switch device to Resistor negative output terminal; the total resistance value of the resistor array is adjusted by turning on or off the...
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The invention relates to the technical field of electronic circuits, in particular to a controllable resistance output device, a method thereof and an application. The resistance output device comprises an upper computer, a lower computer, first switching devices, second switching devices and a resistance array, the upper computer is sued for inputting a resistance value and transmitting an instruction to the lower computer, the lower computer receives the instruction of the upper computer and controls connection and disconnection of the first switching device and the second switching device, so that a total resistance value of the resistance array is adjusted, the resistance array comprises a plurality of insulation resistors which are serially connected between a resistance positive output end and a resistance negative output end, the first switching devices are parallelly connected at two ends of each insulation resistor, and each insulation resistor is serially connected to the resistance negative output end through the corresponding second switching device.
Description
technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a resistance output device with controllable resistance and its method and application. Background technique [0002] Conventional cars use fuel or natural gas as their power source, and rarely have high-voltage insulation problems, while electric cars are a complex mechatronic product. Electric vehicles use multiple batteries in series to supply power, and the voltage is generally above 300V. In the actual operation of electric vehicles, the on-board working environment is complex, vibration, sharp changes in temperature and humidity, corrosion of acid and alkali gases, etc. will cause insulation performance to decline . The insulation status of electric vehicles is determined by the insulation resistance of the positive and negative busbars of the DC battery pack to the body ground. The technical standards have clear regulations, and the insulation resistance must ...
Claims
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IPC IPC(8): G01R31/14
Inventor 刘飞文锋阮旭松龚敏明许伟聪
Owner HUIZHOU EPOWER ELECTRONICS