Design and analysis of a bi-stable linear force actuator for directly-driven metering pump

Abstract

As a kind of energy converter, high quality electromagnetic linear actuator is the focus of the research. A new flow regulation method for metering pump is proposed, a novel bi-stable linear force actuator (BLFA) is investigated corresponding to reduce power consumption and enhance drive capability. A coupling model including a loss model, an electromagnetic model and a mechanical model was constructed. The influence rule of the structural parameters on force characteristic was investigated. Through structural parameter design, force versus position characteristic is high-linearity in working area and the minimum threshold value of drive force (start-up force) reaches 139 N without spring mechanism, which effectively reduces the device’s volume. Besides, power consumption in holding phase is decreased because of holding force. Moreover, an innovative pulse current excitation mode was adopted to reduce power consumption further. Experimental and simulation results validate the static and dynamic performance of BLFA. The circulating power consumption of prototype is 3.1 J, which does not change with the working frequency and has decreased by 34% compared with the traditional excitation mode. Additionally, the advantage of BLFA’s performance was also verified with directly-driven metering pump flow characteristic experiment.

Sensorless Landing Control Strategy of Bistable Permanent Magnet Actuator

“…A control-oriented dynamics mathematical model of actuator is established. The model is verified by the test bench proposed in [5,11]. The comparison between the simulation and experimental results with the same control signal are shown in Figure 4.…”

“…As a kind of energy converter, BPMA has been widely used in applications ranging from automation to transportation because of avoiding unacceptable weakening performance and reducing power consumption resulting from holding current [1][2][3]. However, the undesired impact issues of bounce and noise dramatically reduce the durability, reliability, and precision of the BPMA [4,5].…”

Multi-Objective Optimization and Analysis of Tri-Stable Permanent Magnet Actuators for Valve Application

“…In reference [11] and [12], the holding force reaches 100 N, while the startup force is less than 30 N. More seriously, the driving force at starting of stroke is minus without spring mechanism [15]. In [16], driving force was enhanced by linear force versus position characteristic, prototype's startup force reaches 130 N. Compared with ordinary bi-stable actuator with low power consumption, the bi-stable actuator with high output force density has advantage of fast response. The bistable actuator can be applied extensively in the valve control if tri-stable motion can be realized.…”

A Trajectory Planning-Based Energy-Optimal Method for an EMVT System

“…The electromagnetic field is optimized by optimizing the permanent magnet array and armature reaction. In this way, the output force is increased [Liu (2009) ;Tan, Li, Ge et al (2018)]. However, with the development of the research, the room for further reducing the energy consumption by optimizing the actuator structure is very small.…”