Electro-hydraulic control system and method based on frequency-conversion speed regulation
A hydraulic control system, electro-hydraulic composite technology, applied in the direction of control/adjustment system, non-electric variable control, flow control of electric devices, etc., can solve the problem of limited overcurrent and overload capacity of power electronic devices, slow response speed of frequency converter and motor , Motor acceleration and deceleration time is long and other problems, to achieve the effect of low energy loss, fast response speed, and accelerated response speed
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[0038] Such as figure 1 As shown, the frequency converter 1 is connected to the hydraulic pump 3 through the motor 2, the hydraulic control system 5 and the energy control unit 6 are connected to the output port of the hydraulic pump 3 in parallel, the frequency converter 1, the motor 2, the hydraulic control system 5, and the energy adjustment unit 6 The detection signals are respectively connected to the detection feedback unit 4, the feedback signal of the detection feedback unit 4 is connected to the controller 7, and the control signal output by the controller 7 controls the frequency converter 1, the hydraulic control system 5, and the energy adjustment unit 6 respectively.
[0039] 1) The hydraulic control system is a valve control system, relying on hydraulic control valves (electro-hydraulic proportional valves, etc.) to control the speed and pressure of the system;
[0040] 2) The hydraulic pump is an ordinary hydraulic pump, which can be a quantitative pump or a var...
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