Electromagnetic metering pump drive circuit and drive control method

CN114679076BActive Publication Date: 2026-06-05RES INST OF ZHEJIANG UNIV TAIZHOU

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: RES INST OF ZHEJIANG UNIV TAIZHOU
Filing Date: 2022-03-17
Publication Date: 2026-06-05

AI Technical Summary

Technical Problem

Existing electromagnetic metering pumps have a long demagnetization process, high power consumption, unstable flow rate, limited maximum pumping pressure, and the electromagnetic coil reset parameters affect the flow rate, thus limiting the improvement of product performance.

Method used

A closed-loop control method is adopted, consisting of AC power supply, full-bridge circuit, switching transistor drive circuit, current sampling circuit and signal processing module. By driving the switching transistor with a complementary PWM waveform with a dead time, excitation and active demagnetization are achieved. Combined with current closed-loop control, the energy recovery and demagnetization process of the electromagnetic coil are optimized.

Benefits of technology

The maximum stroke and pump flow rate of the electromagnetic metering pump have been increased, while power consumption and heat dissipation requirements have been reduced, flow stability has been maintained, the range of pump pressure models has been expanded, and power efficiency has been improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a driving circuit and a control method of an electromagnetic metering pump, and the method comprises the following steps: calculating the starting pulse sequence number of each step in a stroke cycle, the starting current of active demagnetization, the starting time of active demagnetization, the starting duty ratio of a demagnetization process and other operation parameters according to system settings and hardware parameters; K1 is turned off, and K2 and K3 are directly turned on; K1 and K2 are driven by using complementary PWM waveforms with an inserted dead zone, and K3 remains to be turned on; K1 remains to be turned off, K2 and K3 remain to be turned on; K1 remains to be turned off, K2 remains to be turned on, and K3 is driven in a PWM mode; liquid suction, structure recovery and detection of stroke parameters; the active demagnetization function of the driving control electromagnetic pump and the electromagnetic coil is used, the electromagnetic pump has the characteristics of short demagnetization time and meets high-speed driving, the driving control method meets convenient configuration of driving parameters of a controller, effectively expands the maximum stroke and the maximum pump-out pressure range, and simultaneously reduces the design requirement of a pump body heat dissipation structure.

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