Torque and speed estimators to be implemented in a control strategy dedicated to TSTPI-fed BDCM drives

Major improvements of the cost-effectiveness and of the reliability of electric machine drives could be gained through the integration of reduced structure inverters. Within this approach, the three-switch three-phase delta-shaped inverter (TSTPI) turns to be an interesting candidate. In a previous work, we have found that high performance of the TSTPI fed brushless DC motor drive could be gained following the implementation of a dedicated control strategy including a torque loop in order to reduce torque ripple during sequence-to-sequence commutations. Therefore, beyond the speed, the electromagnetic torque estimation turns to be a necessity. The paper proposes BDCM speed and torque estimators which are developed taking into account the waveforms of the phase back-EMFs and the outputs of six-pulse encoder associated to the motor.

[1]  Ahmed Masmoudi,et al.  A DTC strategy dedicated to three‐switch three‐phase inverter‐fed induction motor drives , 2008 .

[2]  Jacobus Daniel van Wyk,et al.  A Comparative Investigation of a Three-Phase Induction Machine Drive with a Component Minimized Voltage-Fed Inverter under Different Control Options , 1984 .

[3]  Ahmed Masmoudi,et al.  DTC of an FSTPI‐fed induction motor drive with extended speed range , 2008 .

[4]  J. D. van Wyk,et al.  A Comparative Investigation of a Three-Phase Induction Machine Drive with a Component Minimized Voltage-Fed Inverter under Different Control Options , 1984, IEEE Transactions on Industry Applications.

[5]  B. El Badsi,et al.  On the potentialities of reduced structure inverters integrated in automotive electric motor drives , 2009, 2009 8th International Symposium on Advanced Electromechanical Motion Systems & Electric Drives Joint Symposium.

[6]  Ahmed Masmoudi,et al.  On the analysis and control of a three‐switch three‐phase inverter‐fed brushless DC motor drive , 2007 .

[7]  J. Holtz,et al.  Sensorless vector control of induction motors at very low speed using a nonlinear inverter model and parameter identification , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[8]  Jianwen Shao,et al.  A novel microcontroller-based sensorless brushless DC (BLDC) motor drive for automotive fuel pumps , 2002 .

[9]  Mehrdad Ehsani,et al.  Advanced BLDC motor drive for low cost and high performance propulsion system in electric and hybrid vehicles , 2001, IEMDC 2001. IEEE International Electric Machines and Drives Conference (Cat. No.01EX485).