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Several position sensorless control methods of IPMSMs(Interior Permanent Magnet Synchronous Motors) using the observers have been proposed. In case of the full-order observers, these designs are difficult, because the order of the error equations of the observers becomes four. In this paper, for the position sensorless control of IPMSMs, a design method of the full-order observer based on the extended...
Synchronous reluctance motors (SynRMs) have attracted studies, because SynRMs have no magnets in the rotors. The position sensorless control at low speeds of SynRMs is now desired, and several methods have been proposed. In this paper, by using the high-frequency current control system, a new position sensorless control method of SynRMs at low speeds by superimposing high-frequency current whose amplitude...
Synchronous reluctance motors (SynRMs) have attracted attention, because SynRMs have no magnets in the rotor. Position sensorless control at low speeds of SynRMs is now desired, and several methods have been proposed. The new position sensorless control method of SynRMs at low speeds by estimating a high-frequency extended e.m.f.(EEMF) caused by superimposed high-frequency current has been proposed...
This paper proposes an adaptive positioning control of servo system using position sensorless controlled interior permanent magnet synchronous motor (IPMSM), in which the proposed adaptive system is based on the combination of Dynamic Certainty Equivalence (DyCE) principle and the rotor position estimation method of IPMSM with comb filters. Generally, the positioning servo system is out of the strictly...
This paper proposes a new flux estimation for permanent magnet synchronous motor sensorless control using all-path filters and band-pass filters as quasi-integrators, which can enhance the flux linkage estimation performance using all-path filters and low-path filters that the authors have already proposed. This paper also presents extremely precise rotor position estimation performances in the low-speed...
This paper proposes a direct rotor-position estimation method for IPMSMs (Interior Permanent Magnet Synchronous Motors) in low-speed regions including standstill. In general, the rotor position is estimated indirectly by converging the position estimation error into 0 by the phase-locked-loop (PLL). The indirect rotor position estimation methods require the convergence time of position estimation...
This paper proposes a direct rotor-position estimation method for IPMSMs (Interior Permanent Magnet Synchronous Motors) in low-speed regions including standstill. Proposed estimation method does not require phase-locked-loop (PLL) which degrade the response of position estimation and it can improve the response of position estimation.
Recently, synchronous reluctance motors (SynRMs) have attracted study because of their favorable properties, including limited thermal expansion of the shaft due to low heat generation by the rotor, the ability to drive at high velocity, a low degree of torque ripple and an absence of demagnetization problems. Sensorless control of SynRMs is now desired, and several methods have been proposed. These...
This paper proposes the fast initial position estimation of IPMSMs (Interior Permanent Magnet Synchronous Motors), based on intentional pulse voltage injection and comb filters. Generally, the rotor position can be estimated by detecting high-frequency current caused by injected high-frequency voltage because its response includes inductance information due to saliency. In general, sinusoidal current,...
This paper proposes improvements of speed adaptation response for Interior Permanent Magnet Synchronous Motors (IPMSMs) position sensorless vector control using a parallel feedforward compensator. Position sensorless control based on an adaptive observer is known to cause delay in the speed adaptation response since gain characteristics on the speed adaptation are reduced in high frequency range,...
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