Vector Control of an Induction Motor Fed by a PWM Inverter with Output LC Filter

Salomaki, J.; Luomi, J.

doi:10.1080/09398368.2006.11463611

Cited by 26 publications

(10 citation statements)

References 1 publication

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“…adding any extra measurements to the AC drive [6]- [8]. The control performance is close to that of a drive without the filter.…”

Section: Introductionmentioning

confidence: 61%

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Influence of Inverter Output Filter on Maximum Torque and Speed of PMSM Drives

Salomaki¹,

Hinkkanen²,

Luomi³

2008

IEEE Trans. on Ind. Applicat.

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Abstract-The paper deals with the maximum torque and speed of permanent magnet synchronous motor (PMSM) drives when the inverter output voltage is filtered by an LC filter with a cut-off frequency well below the switching frequency. According to steady-state analysis, the filter affects the performance of the motor drive especially at high speeds. The stator current is not equal to the inverter current, and due to the inverter current and inverter voltage limits, the torque-maximizing stator current locus differs from that of a drive without the filter. A field-weakening method is proposed for PMSM drives with an inverter output filter. The method is implemented and tested in a 2.2-kW PMSM drive. The experimental results agree well with the analysis, and validate the high-speed performance of the proposed field-weakening method.Index Terms-Permanent magnet synchronous motor (PMSM) drives, inverter output filter, field-weakening control, vector control.

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“…adding any extra measurements to the AC drive [6]- [8]. The control performance is close to that of a drive without the filter.…”

Section: Introductionmentioning

confidence: 61%

“…(ii) the value defined by the stator current limit according to (6); or (iii) the value defined by the inverter current limit according to (7)- (9) assuming R s = 0.…”

Section: A Field-weakening Control Algorithmmentioning

confidence: 99%

Influence of Inverter Output Filter on Maximum Torque and Speed of PMSM Drives

Salomaki¹,

Hinkkanen²,

Luomi³

2008

IEEE Trans. on Ind. Applicat.

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“…For practical reasons, however, no extra hardware should be added to the frequency converter, and the drive should preferably work without a speed sensor. A full-order observer was recently presented for induction motor drives with an LC filter [6], allowing the estimation of the motor current and voltage without additional current or voltage measurements. The control of the system is based on cascaded control loops.…”

Section: Introductionmentioning

confidence: 99%

Sensorless control of induction motor drives equipped with inverter output filter

Salomaki¹,

Hinkkanen²,

Luomi³

2005

IEEE International Conference on Electric Machines and Drives, 2005.

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This paper deals with the speed sensorless vector control of an induction motor in a special case where the output voltage of the PWM inverter is filtered by an LC filter. The system states are estimated by means of an adaptive fullorder observer, and no additional voltage, current or speed measurements are needed. The rotor speed adaptation is based on the estimation error of the inverter output current. Dynamic analysis is used to find an observer gain that enables a wide operation region, including very low and very high speeds. A torque-maximizing control method is applied in the fieldweakening region. Simulation and experimental results show that the performance is comparable to that of a drive without the LC filter.0-7803-8987-5/05/$20.00 ©2005 IEEE.

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“…[3]Fu ll Order Observer The most essential part of the control is a full-order observer, which is implemented in the estimated rotor flu x reference frame, i.e., in a reference frame where = + 0. the observer is defined as = + + ( − ) Where estimated states are marked by the symbol "^" and…”

Section: Iiprinciple Of Control S Ystemmentioning

confidence: 99%

“…In addition, a PI-type rotor flu x controller is used. [3] Observability The observability of the system can be investigated using 2 3 [ ]…”

Section: Iiprinciple Of Control S Ystemmentioning

confidence: 99%