Sensorless control of PM synchronous motors and brushless DC motors - an overview and evaluation

Montesinos, D.; Galceran, S.; Blaabjerg, Frede; Sudria, A.; Gomis, Oriol

doi:10.1109/epe.2005.219492

Cited by 16 publications

(7 citation statements)

References 22 publications

(27 reference statements)

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“…By (10), this load angle oscillation makes the I-F method torque T e oscillation too. A LPF is introduced in this subsection to smooth I-F input signal.…”

Section: A Speed Command Analysismentioning

confidence: 97%

“…The second one is the torque current should be smooth at switch process. By comparing (10) and (19), it can be found that, the torque jump is proportioned to the switch load angle θ LS .…”

Section: Startup Strategymentioning

confidence: 99%

“…So far by the overview and evaluation results [10] of sensorless PMSM control, people can find that, the close speed loop methods perform better dynamic response and robustness under rapid external disturbance. But no matter BEMF or HFI based method, there are some limitations.…”

Section: Introductionmentioning

confidence: 98%

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A novel smooth transition strategy for BEMF-based sensorless drive startup of PMSM

Wang

2014

Proceeding of the 11th World Congress on Intelligent Control and Automation

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This paper proposes a novel smooth transition method, which can be applied to back electromotive force (BEMF)-based permanent magnet synchronous motors (PMSM) sensorless vector control drive. The problem with BEMF-based sensorless control of PMSM control is the inherent BEMF estimation precision before reaching a certain rotation velocity. A position open loop constant current (I-F) method, which is compared with the classical voltage-frequency (V-F) method of asynchronous motors control, is employed by applying the torque current feedback control technique to drive the motor from standstill to switch frequency. I-F strategy is analyzed first, the critical element load angle, which can influence motors switch process performance, is studied. To eliminate the switch physical parameters disturbance and achieve smooth transition, a novel strategy, that can transit the PMSM drive state from I-F, which is used during standstill and low speed rotation region, to BEMF-based sensorless FOC control smoothly, are presented. The transition strategy is furnished and its performance is shown and analyzed based on the PMSM dynamic model. At the end, an experimental platform, which is built by a high speed PMSM spindle and corresponding sensorless drive, is introduced to realize the supposed method, which can show the switch smoothness and illustrate the theoretical analysis rationality.

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“…By (10), this load angle oscillation makes the I-F method torque T e oscillation too. A LPF is introduced in this subsection to smooth I-F input signal.…”

Section: A Speed Command Analysismentioning

confidence: 97%

“…The second one is the torque current should be smooth at switch process. By comparing (10) and (19), it can be found that, the torque jump is proportioned to the switch load angle θ LS .…”

Section: Startup Strategymentioning

confidence: 99%

See 1 more Smart Citation

A novel smooth transition strategy for BEMF-based sensorless drive startup of PMSM

Wang

2014

Proceeding of the 11th World Congress on Intelligent Control and Automation

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“…The flux position is estimated from the measured current and voltages which are then manipulated and used to control the switching angle of the power electronics. Many types of flux observer have been discussed in papers and books [15][16][17][18][19][20]. In general, the steady-state first derivative of the angle gives the speed.…”

Section: Over-threshold Speed Controlmentioning

confidence: 99%

Control of a BLPM machine using an integrated torque sensor in place of a rotor position sensor

Alrifai

2013

2013 IEEE International Conference on Industrial Technology (ICIT)

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Closed-loop torque and speed control of the brushless permanent magnet (BLPM) machine requires rotor positional information to control the associated power electronic inverter. Rotor position information is acquired by position sensors or position sensorless schemes. These position sensors increase the cost and size of the BLPM drive systems and make it prone to mechanical failure due to the sensitive nature of typical rotor position sensing devices. Many researchers are investigating position sensorless schemes to address these points, however most position sensorless techniques behave poorly at stand-still and low speeds (0-300rpm); they also behave poorly due to the fact that they estimate load torque which can be difficult in undefined load applications due to control parameter changes. This paper proposes a novel idea to achieve closed-loop control of a BLPM machine by using measured shaft torque feedback from an integrated, low-cost, torque surface acoustic torque (SAW) transducer.

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“…All the solutions proposed during the last years have both advantages and drawbacks. Reference [3] gives a state of art of sensorless techniques for both PMSM and BLDC motor. Those for PMSM are generally based on algebraic manipulation of motor equations using voltage and current measurements.…”

Section: Introductionmentioning

confidence: 99%

A real-time observer for UAV's brushless motors

Koteich

Moing²,

Janot³

et al. 2013

2013 IEEE 11th International Workshop of Electronics, Control, Measurement, Signals and Their Application to Mechatronics

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Abstract-Vector control has been widely used in control of permanent magnet synchronous motors (PMSM). This technique requires an accurate knowledge of the rotor position. In many applications, such as mini-UAV, it is not possible to install any mechanical sensor. Therefore, a sensorless technique using position observer has to be implemented in order to estimate the rotor position. In this paper, we propose a new observer for PMSM sensorless control: the position estimate is generated upon electromagnetic relations (dynamics of magnetic flux in the motor) in the two-phase stationary reference frame. The implementation of the proposed observer is not a real burden; its validity is experimentally tested and satisfactory results are obtained regarding real position (and speed set-point) tracking in different operating situations.

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Sensorless control of PM synchronous motors and brushless DC motors - an overview and evaluation

Cited by 16 publications

References 22 publications

A novel smooth transition strategy for BEMF-based sensorless drive startup of PMSM

A novel smooth transition strategy for BEMF-based sensorless drive startup of PMSM

Control of a BLPM machine using an integrated torque sensor in place of a rotor position sensor

A real-time observer for UAV's brushless motors

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