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Control method for preventing diesel locomotive auxiliary electricity generation circuit from overvoltage

A technology for auxiliary power generation and diesel locomotives, which is applied in the control system, control of generators, control of generators through magnetic field changes, etc., can solve problems affecting locomotive control, speed regulation hysteresis, diesel engine speed regulation, etc.

Active Publication Date: 2014-03-26
CRRC DALIAN CO LTD
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Problems solved by technology

However, this will affect the speed regulation of the diesel engine, and there will be a phenomenon such as speed regulation hysteresis, which will make the driver and passengers mistakenly believe that the diesel engine speed regulation is faulty, which will affect the control of the locomotive.

Method used

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  • Control method for preventing diesel locomotive auxiliary electricity generation circuit from overvoltage
  • Control method for preventing diesel locomotive auxiliary electricity generation circuit from overvoltage

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Embodiment Construction

[0011] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0012] see figure 1 , the control method for preventing the overvoltage of the diesel locomotive auxiliary power generation circuit in this embodiment, its system operation principle is: after the system is started, it first enters frame 1.2 to detect the PWM duty ratio, the last duty ratio and the preset duty ratio P % comparison (P% is pre...

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Abstract

The invention relates to a control method for preventing a diesel locomotive auxiliary electricity generation circuit from overvoltage. A voltage base value of the auxiliary electricity generation circuit is set, an actual voltage value of the auxiliary electricity generation circuit is detected, the difference between the voltage base value and the actual voltage value is put into a PI to be adjusted and calculated, and a PI calculation result is used for generating a PWM wave form to drive an auxiliary generator exciting current. The control method is characterized in that the PWM duty ratio is detected, when the PWM duty ratio is larger than a preset value P%, the voltage base value is adjusted, and PWM output is limited. The problem that overvoltage happens on the diesel locomotive auxiliary electricity generation circuit because the rotating speed of a diesel engine is promoted when the diesel engine is low in rotating speed and an air compressor works is solved, and not only is safety of an electrical system ensured, but also the needs for operating a diesel locomotive are met.

Description

technical field [0001] The invention relates to a control method for preventing overvoltage of an auxiliary power generation circuit of a diesel locomotive, belonging to the technical field of railway locomotives. Background technique [0002] The auxiliary power generation circuit of the diesel locomotive converts part of the mechanical power output by the locomotive diesel engine into electrical power through the AC auxiliary generator, and converts the AC power into DC power through the rectifier bridge, and provides it to the locomotive control system and some electrical systems. When the diesel engine stops running, it relies on the locomotive's own battery pack to provide electric energy for the locomotive control system and some electrical systems. However, the capacity of the battery pack is limited, and the time it can support the operation of the locomotive control system and some electrical systems is also limited. Therefore, under normal circumstances, after the...

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Application Information

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IPC IPC(8): H02P9/26
CPCH02P9/30H02P9/305
Inventor 管明华谭志勇姜捷付明祥宋维胜
Owner CRRC DALIAN CO LTD
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