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Precise speed control of an Interior Permanent Magnet Synchronous Motor (IPMSM) drive becomes a complex issue due to complex coupling among its winding currents and the rotor speed as well as the nonlinear nature of the developed torque. The system nonlinearity becomes severe when the IPMSM drive operates in the field weakening region. The main purpose of this paper is to present the implementation...
A chattering-free robust nonlinear controller is proposed for the speed control of an IPMSM drive system to compensate for the parameter uncertainties and load disturbances. First, the input-output feedback linearization technique is used with a load torque estimator. Next, the upper bounds of the uncertainties are defined in design of the chattering-free robust controller. After that, in order to...
This paper proposes a new voltage control technique for IPMSM drives to extend DC-link voltage utilization for flux weakening operation. The presented method does not require look-up-table and motor parameter for flux weakening operation. The difference between the switching period and summation of active switching times for PWM control of inverter is used to modify the d-axis current reference under...
The paper describes a Direct-Flux Vector Control (DFVC) scheme suitable for synchronous Permanent Magnet (PM) drives employed in applications that require motor flux-weakening operation, as happens for traction drives. The proposed controller operates in stator flux reference frame and can be easily adapted for Surface-mounted PM (SPM) and Interior PM (IPM) motors. The stator flux is directly controlled...
Drives based on permanent magnet synchronous machines become more and more popular in many industrial applications. In most application traditional control algorithms are used leading to problems with the drive operation optimization. The paper presents a method of field weakening implementation in model based predictive control scheme.
Since the efficiency is very important in automotive applications, in this paper a new minimum-copper-loss control scheme, over full speed range for an IPMSM drive used for hybrid electric vehicle application under both current and voltage limits is presented. This paper presents an algorithm to get the smallest current vector command in both field-weakening and deep field-weakening regions for a...
This paper presents an analysis of two different control strategies applied to a bidirectional dc-dc boost converter in a permanent magnet synchronous motor drive for hybrid electric vehicles. A constant rated voltage-fed inverter and a variable voltage control strategy that takes into account the motor mechanical speed to adjust the dc-dc converter output voltage are considered. Moreover, single...
The paper deals with a new scalar control algorithm for industrial IPMSM drives able to perform an effective energy saving strategy. According to the motor operating point and using a polynomial relationship between torque angle and stator current phase, such a control exploits the conditions of Maximum Torque per Ampere (MTPA), Flux Weakening (FW) or Maximum Torque per Voltage (MTPV). The paper provides...
This paper proposes an algorithm to generate the optimum d- and q-axes current references for PMSMS (permanent magnet synchronous motor with sinusoidal excitation) drive system for wide speed range that is fed by frequency converter that has no regenerative unit. The algorithm offers optimum torque capability for PMSMS despite significant changes in the dc link voltage and machine parameters and it...
To solve the problems of large flux and torque ripples and inconstant switching frequency in direct torque control (DTC) for permanent magnet synchronous motors (PMSM) and to eliminate speed sensor since it deteriorates system reliability and increases the cost of system, a novel speed sensorless DTC method based on space vector modulation (SVM) is proposed in this paper. This method is based on the...
This paper proposes a control method suitable for limited armature voltage and current in a permanent-magnet synchronous motor drive system based on direct torque control. First, this paper proposes torque-limiting and flux-weakening control that is suitable for a direct torque control based motor drive system. The proposed method utilizes a mathematical model in a rotating reference frame synchronized...
AC drives in industrial applications are rapidly increasing. It has replaced the DC motors in motion control applications and possibly makes DC motors relatively obsolete by the beginning of the next century. For high performance drives that require rapid dynamics and precise regulation, the need of vector control is becoming an urgent demand. In order to provide a method of decoupling the two components...
In this paper, a robust field-weakening control strategy for IPMSM drives is proposed to achieve fast response and minimum copper loss. First, the classification of three operation regions for positive speed operation is adopted. It is seen that current limit and voltage limit will affect the maximum torque capability and minimum copper loss operation. Second, in order to achieve minimum copper loss...
Low-power PMSMS (permanent magnet synchronous motor with sinusoidal excitation) drive systems are standard equipped with PWM inverter which employ a diode rectifier front-end (has not a regenerative unit) to supply the ac power from the mains to the dc link. This paper proposes an algorithm to generate the optimum d- and q-axis reference currents for four quadrant operation of PMSMS drive system,...
This paper proposes an algorithm to generate the optimum d- and q-axes current references for PMSMS (permanent magnet synchronous motor with sinusoidal excitation) drive system for wide speed range that is fed by frequency converter that has not regenerative unit. The algorithm offers optimum torque capability for PMSMS despite significant changes in the dc link voltage and machine parameters and...
At present, vector control (VC) has been widely used in the interior permanent magnet synchronous motor (IPMSM). However, for the difference between direct and quadrature inductances and the difference of control characteristics between d-q axes current loop PI regulators, the dynamic decoupling can not be achieved, which affects the torque dynamic response and the quick startup of motor. For this...
We propose in this paper a new adaptive backstepping servo control algorithm that satisfies the maximum torque per ampere condition for interior permanent magnet synchronous motor drive systems using implicit and symbolic computation approach. The proposed design method, compared to conventional ones, possesses more degrees of freedom and flexibility in designing the control and parameter estimation...
In order to research the influence of hidden layer neurons of artificial neural network (ANN) and switching frequency of power switches on the performance of permanent magnet synchronous motor(PMSM), a algorithm of space vector pulse width modulation based on artificial neural network (ANN-SVPWM) is proposed. The simulation and experiment of closed-loop PMSM control system are done. The results show...
The objective of this paper is to model and simulate a three-phase Voltage Source Pulse Width Modulation (PWM) Rectifier Based on Direct Current Control feeding an indirect vector controlled Induction Motor Drive (VCIM) and 3-Level SVM based PMSM Drive. Based on the mathematical model of PWM rectifier, the dual close loop engineering design with decoupled feed-forward control is applied in the three...
This paper proposes a new speed sensorless direct torque and flux controlled interior permanent magnet synchronous motor (IPMSM) drive. Closed-loop control of both the torque and stator flux linkage are achieved by using two proportional-integral (PI) controllers. The reference voltage vectors are generated by a space vector modulation (SVM) unit. The drive uses an adaptive sliding mode observer for...
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