Smart control of electromagnetically driven dosing pumps
Research Task/Objectives
Dosing pump and test build-up of electronics
Electromagnetically driven dosing pumps are well suited for delivering and metering any kind of liquid in vehicles. By using an uncontrolled excitation, the pump mostly has an undesired noise occurrence and unnecessary energy consumption, which depend on the operating conditions.
The research’s objective is the reduction of the noise occurrence and energy consumption by using a smart control, independent from varying operating conditions and by maintaining the simple pump design. Therefore, the armature position is estimated only by the evaluation of electrical parameters and delivers the input signal for a velocity control.
Approach/Results
Noise reduction by reduced end stop velocities
The project’s focus is a practical realization of the entire method for reduction of the end stop velocity in electronics. Previously, a cosimulation of system and FEM model has offered an investigation of the position estimation depending on a modified excitation required for the noise reduction.
A tiny microcontroller-based electronic, which is developed at the Institute of Fluid Power, contains the algorithm of the position estimation and velocity control. By using the smart electronic, a noise reduction up to 11 dB and a reduction of the energy consumption up to 18 % at nominal supply voltage were achieved at a selected dosing pump. A miniaturization of the cost-efficient electronic offers an integration of the intelligence into the pump connector.
Funded by the BMWi within the ZIM programme (no. KF2452603RU3) in cooperation with Thomas Magnete GmbH.