• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 2007.05a
• /
• pp.311-315
• /
• 2007

In this paper, a new approach for the Synchronous Reluctance Motor control which ensures producing Maximum Torque per Ampere(MTPA) over the entire field weakening region is presented. In addition, This paper presents a speed sensorless control scheme of SynRM using artificial neural network. Also, by adjusting the base speed for the field weakening operation according to the flux level, the current and voltage limit, the smooth and precise transition into the field weakening operation can be achieved The proposed scheme is verified validity through simulation.

• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.54 no.4
• /
• pp.185-191
• /
• 2005

In this paper, a new approach for the Synchronous Reluctance Motor control which ensures producing Maximum Torque per Ampere(MTPA) over the entire field weakening region is presented. In addition, This paper presents a speed sensorless control scheme of SynRM using artificial neural network. Also, by adjusting the base speed for the field weakening operation according to the flux level, the current and voltage limit, the smooth and precise transition into the field weakening operation can be achieved. The proposed scheme is verified validity through simulation.

• Proceedings of the KIEE Conference
• /
• 2002.11d
• /
• pp.183-186
• /
• 2002

The paper is proposed intantaneous torque control of IPMSM for drive of wide speed range. The control scheme is based on the mathematical model of the motor and is applicable to the constant torque and field weakening operations The scheme allows the motor to be driven with maximum torque per ampere (MTPA) characteristic below base speed and it maintains the maximum voltage limit of the motor wide field weakening and the motor current limit under all conditions of operation accurately. For each control mode. a condition that determines the optimal d-axis current $i_d$ for maximum torque operation is derived. The proposed control algorithm is applied to PMSM drive system for drive of wide speed range, the operating characteristics controlled by maximum torque control are examined in detail by simulation.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.16 no.2
• /
• pp.130-136
• /
• 2011

This paper presents the torque control algorithm of a permanent magnet synchronous motor(PMSM) for an electric scooter. The volume of the in-wheel type motor is restricted due to the complicated mechanical structure in wheel of an electric scooter, so the hall sensors instead of resolver and encoder for the rotor position sensors are installed. In this paper, the rotor speed and position are estimated from the speed estimator for vector control of a PMSM with hall sensors. The motor starts to rotate at standstill in BLDC mode with 120 degree conduction. After start up, the operating mode is changed to the vector control with maximum torque per ampere(MTPA) operation at low speeds and flux weakening control at high speeds. The performance of the proposed control algorithm is verified through the experiment in the electric scooter.

• Journal of Power Electronics
• /
• v.12 no.1
• /
• pp.136-144
• /
• 2012

In this paper, the different techniques for the field weakening, also known as constant power speed range (CPSR) operation, for permanent magnet synchronous motor (PMSM) will be introduced and analysed. Field weakening of PMSM, can be done using either vector control (VC) or conventional phase in advance (CPA). Implementation of these techniques depending on some features and constrains. Most of these features and constrains came from the motor parameters. One of these constrains is the motor inductance which determining whether the motor can be driven in the CPSR or not. A new approach for the field weakening will be discussed and to be verified to overcome this constrain. The new approach will be verified through both techniques VC and CPA.

• Proceedings of the KIPE Conference
• /
• 2009.11a
• /
• pp.197-199
• /
• 2009

본 논문에서는 매입형 영구자석 동기기 (Interior Permanent Magent Synchronous Motor)를 이용한 풍력발전 시스템에서의 효과적인 단위 전류 당 최대 토크 (Maximum Torque Per Amper) 제어를 위해 필요한 파라미터인 영구자석 회전자의 초기위치 및 동기 인덕턴스를 측정하는 방법을 보인다. IPMSM을 이용한 풍력 발전 시스템의 경우 기동 토크를 제대로 발생 시키고, 돌극성으로 나타나는 릴럭턴스 토크를 효과적으로 이용하기 위해서는 정확한 회전자의 초기위치 및 인덕턴스 값이 반드시 필요하다. 제안하는 고주파 입력 시험은 역기전력 성분이 발생하지 않아서 이때의 고정자 전류를 해석하여 모터의 회전 없이 현재의 회전자의 위치 및 인덕턴스 값을 측정할 수 있다. 실험 결과를 바탕으로 제안하는 방법의 타당성을 보인다.

• 제어로봇시스템학회:학술대회논문집
• /
• 2005.06a
• /
• pp.1474-1477
• /
• 2005

This paper is proposed maximum torque per ampere of induction motor using fuzzy-neural networks controller. Operation of maximum torque per ampere is achieved when, at a given torque and speed, the slip frequency is adjusted to that so that the stator current amplitude is minimized. This paper introduces a induction motor drive system with fuzzy-neural networks controller. A neural network-based architecture is described for fuzzy logic control. The characteristic rule and their membership function of fuzzy system are represented as the processing nodes in the neural network structure. This paper is proposed the analysis as well as the simulation results to verify the effectiveness of the new method.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.8 no.3
• /
• pp.221-229
• /
• 2003

Interior permanent magnet synchronous motor (IPMSM) has become a popular choice in electric vehicle applications, due to their excellent power to weight ratio. The paper is proposed maximum torque control of IPMSM for electric vehicle drive. The control method is applicable over the entire speed range and considered the limits of the inverter's current and voltage rated value. For each control mode, a condition that determines the optimal d-axis current ${^i}_d$ for maximum torque operation is derived. The proposed control algorithm is applied to IPMSM drive system for electric vehicle drive, the operating characteristics controlled by maximum torque control are examined in detail by simulation.

• Proceedings of the KIPE Conference
• /
• 2002.07a
• /
• pp.297-299
• /
• 2002

This paper is proposed maximum torque control for electric vehicle drive. At low speeds, the reluctance torque is used to maximize the output for a given current level. This Is achieved maximum torque per ampere(MTPA) by selecting an optimal value of the direct stator current component. At high speeds, the system reaches a point at which the inverter will not be able to supply the desired voltage In this case it Is necessary to make use of an increased value the direct current component. The proposed control algorithm is applied to PMSM drive system, the operating characteristics controlled by maximum torque control are examined in detail by simulation.

• Proceedings of the KIPE Conference
• /
• 2010.07a
• /
• pp.65-66
• /
• 2010

This paper deals with PMSM control method for electric scooter. Electric scooter's motor has special structure that is hard to attach resolver or encoder. This paper suggests a method that it is performed of vector control for PMSM using hall sensor. After driving BLDC motor in low speed typically, driving mode is changed to PMSM operation and performs MTPA and flux weakness control. Proposed method is verified through simulation and testing.