In this paper, a novel direct torque control (NDTC) scheme utilizing composite active vectors based on discrete duty ratio modulation method is presented for permanent magnet synchronous motor (PMSM) in industrial robot servo system. The errors the PMSM driven by conventional DTC (CDTC) are compensated single vector during each period, leading to unsatisfied steady-state performance. To improve operation performance of system effectively, independently NDTC. Therefore, two should be applied...

The conventional approach to designing controllers for the phase-shifted full-bridge (PSFB) converter is design a linear compensator based on small-signal model, which cannot provide with strong robustness against parametric disturbances and consistent transient responses over wide range of operating conditions. This paper proposed fixed frequency pulse-width-modulation (PWM)-based integrated sliding mode (ISM) controller PSFB converter. By analyzing modulation full bridge, dynamic...

The active vector effects on torque and flux linkage are different in interior permanent magnet synchronous motor (IPMSM) systems at times under direct control (DTC). These may cause overcompensation or undercompensation to leading large ripples the IPMSM DTC systems. A novel duty ratio modulation strategy for is presented, which considers these differences that ignored conventional strategies. proposed aims minimizing ripple ripple, makes sure system can work an optimum state. angle, impact...

The control of Brushless DC (BLDC) motor has many challenges. A large number harmonics are generated during operation, while it is susceptible to external disturbances such as noise. torque ripple also a constraint the large-scale popularity BLDC motors in some high-end industries. Taking system research object, this paper proposes method H-infinity repetitive control. First, state space expression derived from mathematical model motor. Then, parameters low-pass filter internal mode link...

In order to solve the restrictions, imposed by position sensor, on application of permanent magnet synchronous motor (PMSM) in robot field, a rotor estimation method based super-twisting sliding mode observer (STSMO) is proposed. The built according back electromotive force (EMF) model after EMF equivalent signal obtained. this way, not only are low-pass filter and phase compensation module eliminated, but also accuracy improved. Then, Lyapunov stability analysis carried out verify SPMSM...

The motion quality of the robot is determined by dynamic response and static performance internal motors. It a simple effective way to analyze decoupling control system into multiple single motor systems. can obtain excellent which driven permanent magnet synchronous (PMSM) under direct torque (DTC) strategy, but there exit large ripples in system. In this paper, novel scheme based on space vector modulation (SVM-DTC) proposed, used new controller replace hysteresis comparator that...

In this paper, a novel direct torque control (DTC) scheme based on composite active vectors modulation (CVM) is proposed for permanent magnet synchronous motor (PMSM). The precondition of the accurate compensations error and flux linkage that errors can be compensated fully during entire period. Therefore, compensational effects in different operating conditions PMSM are analyzed firstly, then, divided into three cases according to effects. To bring strategy smoothly, effect factors used...

The active vector effects on torque and stator flux linkage are different in direct control (DTC) system. These differences may cause the over-compensation or under-compensation to leading large ripples. Aimed at making sure system can work an optimum state, a novel duty ratio modulation strategy minimising ripples is designed. Every sector divided into five small sectors, new switching table impact factors first introduced DTC Subsequently, method derived. superiority verified through...

A novel control strategy that is based on iterative calculation of structural parameters proposed for grid-connected inverter in this paper. The has a good dynamic performance, which makes it particularly suitable the application PV generation. First, second-order discretization mathematical model established dq frame. corresponding relation between signal and output current deduced formulas. Then, values formulas can be obtained through calculation, further reduce amount calculation. After...

The operation performance of permanent magnet synchronous motors (PMSMs) driven by direct torque control (DTC) are affected error compensation and flux in each period. compensational effects provided different vectors under strategies analyzed this paper. precondition accurate is applied to the proposed novel composite modulation strategy (CVM) for a PMSM DTC system. In CVM-DTC, operating conditions divided into three cases according relationships between errors actual compensations,...

In order to improve the performance of servo control system driven by a permanent magnet synchronous motor (PMSM) under novel direct torque (NDTC), which, utilizing composite active vectors, fixed sector division criterion, is proposed in this paper. The precondition accurate compensations and flux errors that where stator linkage located can be determined accurately. Consequently, adaptive criterion adopted NDTC. However, computation burden inevitably increased with using part. On other...

In order to improve the performance of servo control system, which is composed ofthe permanent magnet synchronous motor (PMSM) driven by novel direct torque based on fixed sector division criterion (FS-DTC) utilizing composite active vectors, a discrete duty ratio determination method (FS-DDTC) proposed in this paper. The accurate key obtain desired error compensational results for PMSM, related system directly. As applied master vector and slave during each period are adjacent therefore,...

To solve the modeling problem for robot servo system, an ensemble approach based on Radial Basis Function Neural Network (RBFNN) and Improved Gravitational Search Algorithm (IGSA) called RBFNN-IGSA, is presented in this paper. Firstly, RBFNN used to build system model identify parameters of recursive least squares learning process, then during training time, IGSA optimize thresholds simplify complexity counting reduce time modeling.

To address the control performance and harmonic suppression issues in maritime vessel rudder permanent magnet servo systems, a fractional-order PID controller was introduced into existing improved repetitive strategy. We used Oustaloup approximation algorithm particle swarm optimization for tuning controller. The optimized parameters substantially performance. By integrating with controller, composite strategy formed. Finally, MATLAB/Simulink simulations were conducted to compare verify...

The motion quality of the robot is determined by dynamic response and static performance internal motors. It a simple effective way to analyze decoupling control system into multiple single motor systems. can obtain excellent which driven permanent magnet synchronous (PMSM) under direct torque (DTC) strategy, but there exit large ripples flux linkage caused inverter nonlinearity in system. These are analyzed order main harmonics determined. With using adaptive notch filters (ANF) branch,...

In order to meet the demand of special high quality servo motor and driver in robot industry, control system industrial is briefly introduced. On basis ordinary system, proportional resonant (PR) technology introduced improve performance system. verify dynamic characteristics after introducing PR technology, Simulink module was used build model, kinematics simulation carried out. The results show that with has better effect than

Modern communication has been showing the trend of broadband, mobile, miniaturization and integration. The research electromagnetic compatibility (EMC) system become an important part research. For development large scale for industrial robot servo system, EMC index must be programmatic requirements according to first task set, application layer demand constraint is overall goal design, construction process should meet top quantitative design ideas technical constraints; under condition...

A digitized servo motor control system based on DSP is presented. Based the synthetic analysis of dynamic and static performance a system, studied strategy fuzzy adaptive PID controller developed, promoting its performance, at one time, carried design to filter full-digital current wreath in so as improve loop overall performances system. method combining algorithm SVPWM proposed study position velocity accuracy