Abstract:Electrically excited synchronous motor (EESM) is widely used in many large equipment drives because of its strong overload capacity, high efficiency, and adjustable power factor. The research and development of a high-performance EESM control system can realize the high combination of energy-saving speed regulation and green environmental protection and has a high social effect and economic value. In this paper, the signal injection method is used to obtain the initial rotor position information of EESM. Slidi… Show more
“…It is imperative to assume the d- q hypothetic-synchronous rotation coordinate system to estimate rotor position and speed by the pulse high-frequency voltage signal injection method. e positional relationship between d-q and d − q coordinate systems is constructed in accordance with the relationship among coordinate systems [13][14][15][16][17], as presented in Figure 1.…”
Section: Estimate Rotor Position With Pulse High-frequencymentioning
A hybrid pulse vibration high-frequency voltage signal injection method is proposed to solve the problems that the conventional sensorless control algorithm of vehicle IPMSM may generate a large estimated rotor position error and opposite directions in identifying the polarity of magnetic poles under zero-speed and high-torque starting and low-speed operation. The magnetic pole polarity is identified by the saturation effect of the flux chain by injecting a high-frequency sinusoidal voltage signal and opposite pulse voltage signal into the axis
d
^
of the assumed coordinate system simultaneously. Subsequently, the position relationship between the assumed
d
^
axis and the actual d axis is studied in accordance with the amplitude of response current to acquire the rotor position and speed information. The simulation and experimental results suggest that the algorithm is capable of accurately identifying the magnetic pole polarity and estimating the rotor position at zero speed and low speeds, starting the motor smoothly at zero speed, and then operating the motor stably at low speeds.
“…It is imperative to assume the d- q hypothetic-synchronous rotation coordinate system to estimate rotor position and speed by the pulse high-frequency voltage signal injection method. e positional relationship between d-q and d − q coordinate systems is constructed in accordance with the relationship among coordinate systems [13][14][15][16][17], as presented in Figure 1.…”
Section: Estimate Rotor Position With Pulse High-frequencymentioning
A hybrid pulse vibration high-frequency voltage signal injection method is proposed to solve the problems that the conventional sensorless control algorithm of vehicle IPMSM may generate a large estimated rotor position error and opposite directions in identifying the polarity of magnetic poles under zero-speed and high-torque starting and low-speed operation. The magnetic pole polarity is identified by the saturation effect of the flux chain by injecting a high-frequency sinusoidal voltage signal and opposite pulse voltage signal into the axis
d
^
of the assumed coordinate system simultaneously. Subsequently, the position relationship between the assumed
d
^
axis and the actual d axis is studied in accordance with the amplitude of response current to acquire the rotor position and speed information. The simulation and experimental results suggest that the algorithm is capable of accurately identifying the magnetic pole polarity and estimating the rotor position at zero speed and low speeds, starting the motor smoothly at zero speed, and then operating the motor stably at low speeds.
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