scholarly journals Advanced deep flux weakening operation control strategies for IPMSM

2021 ◽  
Vol 11 (5) ◽  
pp. 3798
Author(s):  
Pham Quoc Khanh ◽  
Ho Pham Huy Anh
Keyword(s):  
Control Method ◽  
Hybrid Control ◽  
Control Strategies ◽  
Permanent Magnet Synchronous Motor ◽  
Control Methods ◽  
Motor Speed ◽  
Reference Velocity ◽  
Interior Permanent Magnet ◽  
Voltage Limit ◽  
Flux Weakening

This paper proposes an advanced flux-weakening control method to enlarge the speed range of interior permanent magnet synchronous motor (IPMSM). In the deep flux weakening (FW) region, the flux linkage decreases as the motor speed increases, increasing instability. Classic control methods will be unstable when operating in this area when changing load torque or reference speed is required. The paper proposes a hybrid control method to eliminate instability caused by voltage limit violation and improve the reference velocity-tracking efficiency when combining two classic control methods. Besides, the effective zone of IPMSM in the FW is analyzed and applied to enhance stability and efficiency following reference velocity. Simulation results demonstrate the strength and effectiveness of the proposed method.

scholarly journals Regenerative Battery Charging Control Method for PMSM Drive without a DC/DC Converter

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1126
Author(s):  
Ko ◽  
Park ◽  
Lee
Keyword(s):  
Control Method ◽  
Permanent Magnet Synchronous Motor ◽  
Voltage Control ◽  
Control Methods ◽  
Motor Speed ◽  
Battery Charging ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Charging Control ◽  
Low Pass

This paper illustrates regenerative battery charging control method of the permanent magnet synchronous motor (PMSM) drive without DC/DC converter. Conventional control methods for battery current and voltage control methods generally use a bidirectional DC/DC converter for regenerative control. The reason to use this DC/DC converter is the DC-Link current ripple of the inverter of is affected by switching of the inverter and the motor speed. This problem causes to use a low pass filter (LPF) for sensing the DC-link current, however, it occurs deteriorating the control performance. In this paper, battery current and voltage control methods using only the motor drive are illustrated. To control the DC-link current, power control is performed using the look-up table (LUT) data that are extracted from the experiment. In addition, an applicable method for the variable DC-link voltage of the proposed regenerative control method is illustrated.

scholarly journals Four-Level Hysteresis-Based DTC for Torque Capability Improvement of IPMSM Fed by Three-Level NPC Inverter

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1558 ◽  
Author(s):  
Samer Saleh Hakami ◽  
Kyo-Beum Lee
Keyword(s):  
High Speed ◽  
Control Strategies ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Simple Algorithm ◽  
Torque Control ◽  
Motor Speed ◽  
Average Value ◽  
Stator Current ◽  
Interior Permanent Magnet

Direct torque control (DTC) is considered one of the simplest and fastest control strategies used in motor drives. However, it produces large torque and flux ripples. Replacing the conventional two-level hysteresis torque controller (HTC) with a four-level HTC for a three-level neutral-point clamped (NPC) inverter can reduce the torque and flux ripples in interior permanent magnet synchronous motor (IPMSM) drives. However, the torque will not be controlled properly within the upper HTC bands when driving the IPMSM in the medium and high-speed regions. This problem causes the stator current to drop, resulting in poor torque control. To resolve this problem, a simple algorithm based on a torque error average calculation is proposed. Firstly, the proposed algorithm reads the information of the calculated torque and the corresponding torque reference to calculate the torque error. Secondly, the average value of torque error is calculated instantaneously as the reference torque changes. Finally, the average value of the torque error is used to indicate the operation of the proposed algorithm without the need for motor speed information. By using the proposed algorithm, the torque can be controlled well in all speed regions, and thus, a better stator current waveform can be obtained. Simulation and experimental results validate the effectiveness of the proposed method.

Mode Selecting Control of Interior Permanent Magnet Synchronous Motor for Full Speed Range Operation

2010 ◽  
Vol 43 ◽  
pp. 21-27 ◽  
Author(s):  
Zhi Hong Wu ◽  
Si Bei Wu ◽  
Yuan Zhu ◽  
Guang Yu Tian
Keyword(s):  
State Transition ◽  
Permanent Magnet Synchronous Motor ◽  
Operating Conditions ◽  
Constant Torque ◽  
Speed Range ◽  
Interior Permanent Magnet ◽  
Full Speed ◽  
Source Voltage ◽  
Transition Scheme ◽  
Flux Weakening

The paper presents a new method for mode selecting which includes constant torque mode and flux-weakening mode. The proposed method modifies the working modes not by LUT (look-up table), but by the size of T0. Attractive features of this state transition technique include no dependency on the machine parameters, the least calculated quantities, making full use of the source voltage of the battery, and smooth and fast transition into and out of the flux-weakening mode. Simulation results at various operating conditions are presented to verify the feasibility of the proposed mode transition scheme.

scholarly journals Structure-variable sliding mode control of interior permanent magnet synchronous motor in electric vehicles with improved flux-weakening method

2018 ◽  
Vol 10 (1) ◽  
pp. 168781401770435 ◽  
Author(s):  
Bin Liu ◽  
Yue Zhao ◽  
Hui-Zhong Hu
Keyword(s):  
Permanent Magnet ◽  
Electric Vehicles ◽  
Direct Current ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Interior Permanent Magnet ◽  
Integral Controller ◽  
Bus Voltage ◽  
Flux Weakening

A kind of flux-weakening control method based on speed loop structure-variable sliding mode controller is proposed for interior permanent magnet synchronous motor in electric vehicles. The method combines maximum torque per ampere with vector control strategy to control electric vehicle’s interior permanent magnet synchronous motor. During the flux-weakening control phase, the anti-windup integral controller is introduced into the current loop to prevent the current regulator from entering the saturated state. At the same time, in order to further improve the utilization rate of the direct current bus voltage and expand the flux-weakening regulating range, a space vector pulse-width modulation over-modulation unit is employed to contravariant the direct current bus voltage. Comparing with the conventional proportional–integral controller, the proposed sliding mode control algorithm shows that it has more reliable control performance. In addition, more prominent flux-weakening performance of the proposed flux-weakening method is illustrated by numerical simulation comparison.

Sign in / Sign up

Export Citation Format

Share Document