Modular High-Current Generator for Electromagnetic Forming With Energy Recovery

Abstract

A 10 kJ electromagnetic forming (EMF) modulator with energy recovery based on two resonant power modules, each containing a 4.5 kV/30-kA silicon controlled rectifier, a 1.11-mF capacitor bank and an energy recovery circuit, working in parallel to allow a maximum actuator discharge current amplitude and rate of 50 kA and 2 kA/µs was successfully developed and tested. It can be plugged in standard single phase 230 V/16 A mains socket and the circuit is able to recover up to 32% of its initial energy, reducing the charging time of conventional EMF systems by up to 68%.

Design and Experiments of Electromagnetic Heating Forming Technology

“…The simulation of EIH is carried out firstly, and then forming simulation is carried out. According to [38], the EIH process includes (12)-( 14) and ( 17)- (18) as follows.…”

“…Besides, some studies have been focused on improving the efficiency of the forming process by optimizing the equipment. Luis proposed a new high-current generator with energy recovery based on two resonant power modules, which improves the efficiency of EMF system by up to 32% and reduces charging time in comparison by 68%, and energy can be maximized by adding more modules [18]. Moghadam proposed a new pulsed power supply system based on Z-source full-bridge inverter that has the flexibility in terms of controlling energy and charging the capacitor to provide a proper pulse for EMF, while there is a voltage limitation resulting from the limited use of semiconductor switches [19].…”

Cylinder‐based hybrid rotary nanogenerator for harvesting rotational energy from axles and self‐powered tire pressure monitoring

“…[15][16][17][18][19][20] Plenty of various TENGs has been demonstrated to grab diverse types of mechanical energy, such as vibration, rotation, translational motion, sliding, and so on. [27][28][29] Hence, the hybridization of the two generators is imperative which can realize complementarity. Pint-sized EMGs are quite sensitive to operating frequency and have non-negligible disadvantages of large mass and low output voltage, while TENGs usually possess a relatively high output voltage with a low current.…”

“…Pint-sized EMGs are quite sensitive to operating frequency and have non-negligible disadvantages of large mass and low output voltage, while TENGs usually possess a relatively high output voltage with a low current. [27][28][29] Hence, the hybridization of the two generators is imperative which can realize complementarity. Concretely, by combining of a TENG and EMG, the individual advantages can be integrated while the disadvantages are avoided.…”