Circuits and software are designed for the major parts of the system such as constant magnetic linkage control frequency converter and votating speed difference frequency fuzzy controller.

It is found that the performance of DSPM motor is directly affected by the phase current, so the control strategy focuses on the current control and its influences.

An on_line identification project of load torque disturbance and rotor resistance for vector controlled induction motor is proposed,and then the adaptive control project with load torque disturbance and rotor resistance variation of vector_controlled induction motor is also presented. Theoretical analysis and computer simulation demonstrate that the method is effective and simple.

Circuits and software are designed for the major parts of the system such as constant magnetic linkage control frequency converter and votating speed difference frequency fuzzy controller.

Two electroneutrality and constant-field solutions of the diffusion-migration problem in steady-state conditions on microelectrodes, where both approximations admit analytical solutions, are compared.

The drag-current density is calculated and its dependence on the constant-field strength E1 and the electromagnetic-wave intensity I is analyzed.

DNA damage was determined in non-synchronised cells by constant-field gel electrophoresis, and expressed as the fraction of DNA released.

They were converted to permeabilities by use of the constant-field equation and are in good agreement with the curves which had been calculated from conventional voltage-clamp data.

The organization of the mitochondrial genome in the IR36 indica variety of rice was analyzed using constant-field and CHEF gel electrophoresis.

The basic principle of vector control of the three dimensional motor (3DM) is described. To achieve the vector control of 3DM, three conditions must be satisfied, that is, the field orientation, constant rotor flux linkage and full controllable torque, the key being the accurate control of the stator and rotor currents. The control circuit including the inverter circuit consisting of IGBT intelligent power module is presented and a detailed analysis is made of the current loop. Experimental results are given....

The basic principle of vector control of the three dimensional motor (3DM) is described. To achieve the vector control of 3DM, three conditions must be satisfied, that is, the field orientation, constant rotor flux linkage and full controllable torque, the key being the accurate control of the stator and rotor currents. The control circuit including the inverter circuit consisting of IGBT intelligent power module is presented and a detailed analysis is made of the current loop. Experimental results are given.

Even though two Japanese authors first proposed in the seventies a theoretical method for keeping flux linkage of motor as nearly constant as possible, yet there are practical factors that make flux linkage deviate considerable from being constant. We developed a method that is much simpler than past methods for reducing such deviation. We found that the two causes of deviation are: variation of supply voltage and the existence of the resistance voltage of the stator winding of the motor. They must be compensated...

Even though two Japanese authors first proposed in the seventies a theoretical method for keeping flux linkage of motor as nearly constant as possible, yet there are practical factors that make flux linkage deviate considerable from being constant. We developed a method that is much simpler than past methods for reducing such deviation. We found that the two causes of deviation are: variation of supply voltage and the existence of the resistance voltage of the stator winding of the motor. They must be compensated for if the deviation is to be held to a minimum. The circuit for accomplishing such compensation is shown in Fig.3. Fig.3 is based on the introduction of the concept of zero voltage vector and on making its working time proportional to the total deviation due to two causes. Nonzero voltage vector working time Δ t 1 can be computed with eq.(12), where Δ , dc ·R, V 1, V cc , C, R 3, R 4,R c can be understood by a careful lood at Fig.3, K C=2C V cc /3, K i=R 1/[R c(R 1+R 2)], K A=R 3/R 4. Computer simulation appears to indicate that our simple method is feasible.

An on_line identification project of load torque disturbance and rotor resistance for vector controlled induction motor is proposed,and then the adaptive control project with load torque disturbance and rotor resistance variation of vector_controlled induction motor is also presented. Theoretical analysis and computer simulation demonstrate that the method is effective and simple.