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This paper presents a novel pattern matching based position sensorless control method for IPMSMs. A target IPMSM for the proposed method is designed such that it has high power and torque density, while also being significantly influenced by magnetic saturation. As previously reported in papers [][], for IPMSMs, heavy magnetic saturation affects the spatial distribution of phase inductances according...
This paper presents a new position sensorless control method for high power density IPMSMs that has non-sinusoidal inductance spatial distribution. In standstill and low speed region, high-frequency signal injection method is generally utilized for rotor position estimation. However, to apply conventional method for high power density IPMSMs having non-sinusoidal inductance spatial distribution is...
This paper describes a novel rotor position estimation method for IPMSM at low speed without any signal injection. The basic idea of proposed method is using derivative currents in zero vector state, because the derivative currents include the rotor position information. This paper presents the relationship between rotor position and current response at zero vector mathematically. By this relationship,...
This paper presents a new position sensorless control based on pattern matching method, suitable for high-power density IPMSM. As previously reported [1], the fundamental effectiveness of the pattern matching method was confirmed. Applicable operating point of first implementation of the proposal had been, however, only for light-load condition. To confirm the effectiveness of proposal, we have carried...
This paper discusses a voltage limiter based on a maximum torque control frame for interior permanent magnet synchronous motors. The maximum torque control frame can separate a current vector into two components: t-axis and f-axis. The t- and f-axis represents torque and flux components, respectively. We have already shown the effectiveness of the t-axis current change for the maximum torque response...
This paper deals with an amplitude adjusting method for a signal injection in position sensorless controls of IPMSM (Interior Permanent Magnet Synchronous Motor) drives. Signal injection is necessary for position estimation at standstill and low speeds. Response signals to the injected signals have position information caused by a saliency of the IPMSMs. The position information appears in inductances...
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