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The control system based on a sinusoidal tracking current controller and the primary flux linkage estimation on the stationary reference frame is proposed in interior permanent magnet synchronous motor (IPMSM). This control system is low-parameter sensitivity and it is superior to the disturbance suppression characteristics than a PI current controller. This paper constitutes a similar control system...
This paper proposes a sensorless vector control method based on Primary flux linkage and sinusoidal current tracking control for Interior permanent magnet synchronous motor. The proposed sensorless vector control can control torque at different speeds. Furthermore, the proposed sensorless vector control method estimates the primary flux linkage vector. At various speeds, it is possible to control...
This paper proposes a frequency separation type current control system for a grid-connected single-phase five-level inverter. The proposed control system realizes high tracking performance and high disturbance suppression performance. To obtain high tracking performance to the sinusoidal reference signal, a repetitive controller is applied to the current controller. The current controller with a repetitive...
This paper proposes a new current control method for an interior permanent magnet synchronous motor (IPMSM). In the case of ac motor control, two‐axis current feedback control is performed to control the voltage amplitude and phase. When the inverter voltage is saturated, current control is achieved by controlling the voltage phase. Conventional techniques require switching the mode of the control...
This paper proposes a method of dynamic parameter tuning for a sensorless force control system with I-P(Integral-Proportional) current controllers. All free parameters of the whole system are determined theoretically by pole assignment method. This paper describes that gain of current controllers and estimation bandwidth of a disturbance observer have to be set according to stiffness of target environment,...
This paper studies an integrated design method of sensorless force control and current control systems. The force control gain, the estimation bandwidth and quality factor of a 1st-order disturbance observer, the proportional and integral gain of an I-P current controllers are determined analytically and numerically by Pole assignment method and Coefficient diagram method(CDM). In the case of Pole...
In this paper, Class-G power amplifiers for motion control are developed. General Class-B power amplifier cannot be used for driving high-power actuators because of power efficiency. On the other hand, due to PWM, typical Class-D power amplifier generates switching noise as well as desired current, though the power efficiency is very high. The switching noise cased by PWM inverter degrades the control...
The servo system of a permanent magnet (PM) motor is always required to maintain fine torque and speed response. The current-control system is designed by using the electric parameters of the PM motor. However, motor parameters vary and the current sensors have offset values. When each U-phase and V-phase current sensor has an offset value, the PM motor servo system has the torque ripple and cannot...
It is very important to identify the electrical parameters accurately for the servo system of PM motor, that keep the fine torque response and the fine speed response. Generally, the electrical parameters of PM motor are identified by using the motor voltage and motor current. However, current sensor often has the offset value. In this case, the servo system of PM motor has the torque ripple and can...
This paper proposes a new switching control method of a space voltage vector modulation (SVM) inverter for a speed servo system of a vector controlled induction motor. The proposed switching control method shortens the control lag time of the SVM inverter and improves the current control characteristics of the servo system. Moreover, by using PI controllers considering the voltage saturation and the...
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