In recent years, electro-hydraulic proportional valves have been widely used due to their simple structure, stable performance, high energy efficiency, and eco-friendliness [
1‐
3]. With the development of automobile, aerospace and other industries, higher and higher demands are placed on the characteristics of their controlled valve body which is key control component, and response speed is one of the important indicators. In industrial production, electro-mechanical converters are usually used to drive pilot valves or directly drive electro-hydraulic proportional valves. Their output characteristics determine the performance of proportional valves. The research conducted by scholars at home and abroad on electromechanical converter mainly focuses on the research of control strategy, the development of new electromechanical converters and the way to improve the response characteristics of electromagnetic valves. Among them, the response characteristics of electromagnetic valve are improved by control strategy. For example, Ahn developed a new PWM signal algorithm. Amirante et al. used the proposed boosted PWM technique to improve the open loop control technology [
4,
5], which could effectively improve the response characteristics of electromagnetic valve. Refs. [
6‐
9] analyzed and studied the current, turns per coil, PWM frequency, mechanical parameters and other key parameters of electromagnet influencing the output force of electromagnetic valve. Through observation experiments, Sun et al. [
10] concluded that electromagnetic energy conversion was influenced by the rate of change of drive current. Too big current change would reduce the efficiency of conversion of electromagnetic energy into mechanical energy, thus accelerating power consumption. Thompson Corporation studied the structure and size parameters of the electromagnetic valve through a large number of experiments, and optimized the dynamic and static characteristics, volume and weight of the electromagnetic valve [
11,
12]. Other studies optimized structural design or the dynamic characteristics of electromagnetic valve by selecting soft magnetic materials with different B–H curves [
13‐
16]. For example, Wang et al. [
17] used AL-Fe material to prove by experiment that new soft magnetic material could significantly improve the performance of high-speed electromagnetic digital valve. Cheng et al. [
18] designed the corresponding magnetic circuit based on the application of soft magnetic alloy material. Control rod hydraulic drive mechanism (CRHDM) of Institute of Nuclear and New Energy Technology, Tsinghua University innovates the mechanical structure. Its key part consists of three linear electromagnetic valves, so that it can obtain a large electromagnetic force in a short time [
19]. In addition, new materials such as piezoelectric ceramics (PTZ) and giant magnetostrictive material (GMM) are selected. The electromechanical conversion element composed of PTZ has a high precision and a high response speed, but due to disadvantages such as relatively big hysteresis, the need to develop the corresponding compensation power supply, a small displacement and a high cost, currently the level of commercialization is not high [
20,
21]. Some studies use the electromagnetic parameters to estimate the displacement without the displacement sensor [
22‐
25] or control valve with modern control method [
26‐
28]. In order to improve the dynamic response characteristics of the displacement of the electromechanical converter, this paper proposed a new type of electromechanical converter with double push rods and analyzed and studied its dynamic and static characteristics.