The design and experimental analysis of high-speed switch in 1.14kV level based on novel repulsion actuator

Performance of high‐power thomson coil actuator excited by a current pulse train

“…In [7], the use of a current pulse train, resulting from a double discharge, is suggested to excite a TC. The rationale behind the suggestion is that a time varying magnetic field is required for TC operation, thus supplying a fast varying current for a longer time would be beneficial for actuator operation.…”

“…The rationale behind the suggestion is that a time varying magnetic field is required for TC operation, thus supplying a fast varying current for a longer time would be beneficial for actuator operation. For validation, a relatively low mass low‐speed TC is employed in [7]. Although technically correct, this line of thought fails to take into consideration the time varying air‐gap distance during TC operation.…”

“…The TC is normally excited by discharging a capacitor bank into the coil terminals, resulting in a single current pulse. An alternative technique proposed to improve actuator performance relies on exciting the coil using a train of current pulses [7]. This principle is illustrated in Fig.…”

Finite element analysis and efficiency improvement of the Thomson coil actuator

“…Furthermore, using this approach in combination with more complex current control, such as the current train pulse proposed in [10], may produce additional efficiency gains.…”

Modelling Thomson Coils With Axis-Symmetric Problems: Practical Accuracy Considerations

“…Due to the direction of the induced eddy currents, a repulsive magnetic force appears between coil and armature, enabling rapid armature reaction and high speed displacement. Given the relevance of the design in the operation of ultra-high speed mechanical switches, such as MV [1][2][3][4], HV DC breakers [5] and traction applications [6], considerable effort has been put into its modelling, design and optimization [6][7][8][9][10][11][12][13][14][15][16]. From the existing modelling tools, transient 2D FEA has been shown to provide accurate results for armature speeds around 10 m/s [14,15].…”