Auxiliary fuel pump electric control system and method for realizing soft start
A technology of fuel pump and main controller, which is applied to the starter, pump control, excitation or armature current control of a single DC motor, etc., can solve the problem of the low anti-surge ability of the electric controller and the lack of protection measures for the electronic control equipment of the body , Affect the service life of the product and other issues, to achieve the effect of low power consumption, preventing overcurrent burnout, and avoiding surge damage
Active Publication Date: 2016-09-07
KEBODA TECH CO LTD +1
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Problems solved by technology
The existing fuel pump electric controllers mostly use DC to drive the motor load, and lack the necessary protection measures for the body electric control equipment, resulting in a large inrush current of the motor load when starting, and the electric controller's ability to resist surges is low. In addition, it is easy to The problem of damage caused by excessive local temperature occurs, which affects the service life of the product
Method used
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Embodiment Construction
[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] Please refer to figure 1 . An auxiliary fuel pump electric control system 100 according to an embodiment of the present invention includes a power supply circuit 1 , a main controller 2 , a motor drive circuit 3 , a drive current feedback circuit 4 , a temperature acquisition circuit 5 and an anti-reverse connection protection circuit 6 .
[0025] The motor drive circuit 3 includes a complementary push-pull pre-stage drive circuit 31 and a switch tube. The input end of the complementary push-pull type pre-stage drive circuit 31 is electrically connected to the output end of the main controller 2, the output end is electrically connected to the control end of the switch tube, one end of the switch tube is electrically connected to an input end of the motor 200, and the switch tube The other end of the ground.
[0026] exist figure 2 In the shown embodiment, ...
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The invention discloses an auxiliary fuel pump electric control system, which comprises a power supply circuit, a main controller and a motor drive circuit; the motor drive circuit includes a complementary push-pull type front-stage drive circuit and a switch tube; The input end is electrically connected to the output end of the main controller, the output end is electrically connected to the control end of the switch tube, one end of the switch tube is electrically connected to an input end of the motor, and the other end of the switch tube is grounded; The pull-type pre-stage drive circuit outputs a PWM signal with adjustable duty ratio; the power supply circuit is used to supply power to the main controller and the motor drive circuit. The invention also discloses a method for realizing soft start by using the electric control system of the auxiliary fuel pump. The auxiliary fuel pump electric control system of the invention has strong load driving capability, low power consumption, and can realize soft start control of the oil pump motor.
Description
technical field [0001] The invention relates to an electric control system of an auxiliary fuel pump. Background technique [0002] The function of the fuel pump is to deliver the fuel stored in the fuel tank to the fuel line of the injector. The early fuel pumps were mechanical, and now they have been gradually replaced by electric fuel pumps. The electric fuel pump assembly is mainly composed of electric controller, permanent magnet motor, oil pump, filter, heater and so on. The existing fuel pump electric controllers mostly use DC to drive the motor load, and lack the necessary protection measures for the electric control equipment of the body, resulting in a large inrush current when the motor load starts, and the electric controller has a low ability to resist surges. In addition, it is easy to The problem of damage caused by excessive local temperature occurs, which affects the service life of the product. Contents of the invention [0003] The technical problem t...
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IPC IPC(8): H02P1/18H02P7/29H02H7/08F04B49/06
Inventor 唐杰沈寅李凌耀廖洪浪
Owner KEBODA TECH CO LTD