Dynamic performance analysis of permanent magnet contactor with a flux-weakening control strategy

Abstract

Influence of bending strains on radio frequency characteristics of flexible microwave switches using single-crystal silicon nanomembranes on plastic substrate Appl. Phys. Lett. 99, 153106 (2011) The effects of magnetic field on single-surface resonant multipactor J. Appl. Phys. 110, 063304 (2011) Forming-free resistive switching behavior in Nd2O3, Dy2O3, and Er2O3 films fabricated in full room temperature Appl. Phys. Lett. 99, 113509 (2011) A study on the spectral response of back-illuminated p-i-n AlGaN heterojunction ultraviolet photodetector J. Appl. Phys. 110, 053701 (2011) Redox-controlled memristive switching in the junctions employing Ti reactive electrodes AIP Advances 1, 032141 (2011) Additional information on J. Appl. Phys. A new flux-weakening control strategy for permanent magnet contactors is proposed. By matching the dynamic attraction force and the antiforce, the terminal velocity and collision energy of the movable iron in the closing process are significantly reduced. The movable iron displacement is estimated by detecting the closing voltage and current with the proposed control. A dynamic mathematical model is also established under four kinds of excitation scenarios. The attraction force and flux linkage are predicted by finite element method and the dynamics of the closing process is simulated using the 4th-order Runge-Kutta algorithm. Experiments are carried out on a 250A prototype with an intelligent control unit to verify the proposed control strategy.

Optimal design and control of a new permanent magnet AC contactor with forced breaking mechanism

“…The parallel reluctance in Fig. 3 can thus be written as The reluctance of the pole of the moving core can be calculated as Combination of (5), (10) and (11) gives an expression for the total reluctance of the magnetic path: To consider the flux leakage in the magnetic path, a position‐dependent coefficient is used, which is interpolated as the function of the position of the moving core and the thickness of the PM [15]: Thus, the flux in the moving core can be written as According to Ampere's law…”

“…PM contactors have been extensively studied [10–15]. The field distribution of the PM was investigated in [16] by using the 2D finite element method.…”

Design, Optimization, and Intelligent Control of Permanent-Magnet Contactor

“…Moraes and Perin develop an electronic control unit for reducing the contact bounce in the electromagnetic contactors [19]. Most efforts on PM contactors are, in contrary to common electromagnetic contactors, focusing on the intelligent control devices with closing phase angle selection [20], intelligent control strategy of displacement profile [21], and intelligent control strategy of flux weakening [22]. All these strategies are designed to improve the dynamic characteristic to prolong the electric lifetime of the contactors.…”

Hybrid control system for monostable polarized vacuum contactor drive

“…На теперішній час найбільш перспективними та надійними є саме мікропроцесорні системи керування. В цих пристроях застосовуються або приводи з декількома обмотками або однообмоткові приводи з керуванням за допомогою мостової схеми, утвореної чотирма силовими IGBT транзисторами або тиристорами [11][12][13][14]. Головним недоліком цих схем є використання чотирьох силових транзисторів та драйверів до них або транзистора, тиристорів і драйверів, які є коштовними елементами і підвищують вартість пристрою.…”