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In this paper, a new sensorless detection scheme for PMSM is presented. This detection scheme consits of PMSM's mathematical model and the flux-linkage observer. The mathematical model is used to approximate the nonlinear system of PMSM. Due to the current modification scheme with error-correction fashion, as detailed in this paper, the actual rotor position and the machine speed can be estimated...
In the paper there are presented results of the sensorless control of AC drive with the permanent magnet synchronous motor. The method is based on the rotor magnetic flux components estimation. Practical realization was made by the microcomputer control system with the digital signal processor TMS320F2812. The graphical visualization of the electrical controlled drive was made by the software Lab...
This thesis shows the control process of in-wheel PMSM for electricity scooter. This motor has a mechanical complex structure, so it is difficult to install resolver or encoder position sensor. It suggested the way of vector control for PMSM motor with hall sensor. After driving with BLDC control way in low speed, the control method of motor convert into the way of vector control with MRAS speed observer...
In this paper, the BLDC motor control using rotor position sensing scheme is discussed. The implemented motor drive is controlled by an 8-bit microcontroller PIC18F4431 for driving the power inverter bridge. The use of microcontroller in the drive system will provide flexible and on-line source code modifications in accordance with the motor and circuit requirements. Hardware implementations which...
The injection of an alternating carrier allows detecting the rotor position in PM synchronous motors. It is usually injected through the PWM, being therefore limited to about 1/5 of the switching frequency. By increasing the carrier frequency beyond the switching one, the bandwidth of the position observer can be significantly increased and audible noise can be reduced, among other advantages. A method...
This paper deals a new digital demodulator algorithm for sensorless control of interior permanent magnet synchronous motors (IPMS) based on the estimation of speed and rotor angular position. To this aim a signal similar to that generated by a resolver connected to the shaft of the motor is obtained injecting high frequency stator currents. A new digital algorithm has been designed and set up to demodulate...
In this paper a back-EMF-based method is used in conjunction with three very low-cost integrated circuits based on the Hall-effect to estimate the rotor position of direct-drive PMSMs to be used for traction purpose of an electric wheelchair. A speed estimator based on rotor frame machine model (SERF) has been implemented for the PMSM drives, and then the rotor position estimation is achieved by means...
This paper presents a new digital scheme for the rotor position estimation of a sinusoidal PMSM using three symmetrical locked Hall effect position sensors and then errors are analyzed. The proposed scheme is implemented on an Altera low-cost FPGA, where placement, routing and verification arc completed. Simulation and experimental results show that a higher position precision can be achieved in stable...
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