Mitigation techniques of conducted emi in multilevel inverter drives

Kempski, A.; Smoleński, Robert; Kot, E.

doi:10.1109/cpe.2005.1547570

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…This topology has been proposed for specialist applications. For instance in [13], this topology is used to overcome the magnetic saturation problem in common mode chokes for passive compensation of common mode voltage in a PWM drive system. In [11], the same topology with a special modulation method is used to generate a five-level output voltage with only one power source used to supply both the standard inverter and the H-Bridges.…”

Section: Test Pulses Using the H-bridgementioning

confidence: 99%

Sensorless control of induction motors using multi-level converters

2012

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This study describes a sensorless speed control scheme for induction motors supplied by a multi-level inverter. The scheme exploits the low DC link voltage used in some of the multi-level converter configurations which employ H-Bridges. The rotor position is tracked by measuring the rate of change of motor stator currents when low-voltage test vectors are applied using the H-Bridges. In this way, the motor current distortion introduced by the sensorless control scheme is reduced compared to that seen when using a two-level converter. The proposed approach could therefore be applied to high-power motor drives, and automotive drive systems. The study presents a theoretical derivation of the algorithm and experimental results which show the improvement in the motor current quality achieved using the new technique compared to sensorless techniques implemented on a two-level inverter. Current distortion introduced using two-level convertersBoth the INFORM and FPE sensorless control methods track the rotor slotting saliency in an induction motor by deriving an estimate of the drive's incremental inductance. This is achieved by measuring the motor current derivatives (di/dt) in response to specific voltage vectors applied to the motor. The INFORM [4] method applies these test vectors as specific pulses during the zero or null vectors of the normal PWM waveform. As these test vectors introduce a voltage

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Section: Test Pulses Using the H-bridgementioning

confidence: 99%

Sensorless control of induction motors using multi-level converters

2012

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“…The implementation of this sensorless technique in such applications requires modification to the control software only. [6,7]. Three H Bridges have been connected to a standard inverter.…”

Section: Abmentioning

confidence: 99%

Sensorless control of high power induction motors using multilevel converters

Saleh¹,

Sumner²,

Asher³

et al. 2010

5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010)

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Compensation of Interference Sources Inside Power Electronic Interfaces

Smoleński

2012

Conducted Electromagnetic Interference (EMI) in Smart Grids

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The most suitable way, to eliminate simultaneously all side effects connected with the application of power electronic converters in Smart Grid systems, is the compensation of the interference sources inside of the power electronic interface. In such situation the compensation of the interference sources prevents both the spreading of the interference over extensive circuits and the uncontrolled aggregation of the interference generated by a group of converters, facilitating development of the compatible system. CM Compensator for InvertersThe CM voltage source cancellation in inverter-fed systems [25] can be done using active [54] as well as the passive CM voltage compensators proposed by 37,38]. Compensation in the active series filter is realized by the addition of the common mode voltage of the opposite polarity to each phase. It has been realized using the emitter follower (T 1 , T 2 ). The common mode voltage is detected on Y -connected capacitors (C det ) and added to the phase voltages by a common mode transformer, Fig. 5.1.The equivalent circuit for CM component is presented in Fig. 5.2. The series compensation is realized by addition of the compensating voltage U C by means of the CM adding transformer fed by the voltage-controlled voltage source.The original arrangement proposed by Ogasawara and Akagi for CM voltage, bearing voltage and bearing current elimination was designed using bipolar transistors for a 3 × 200 V, 60 Hz supply of a frequency converter. Each transistor of the emitter follower has to operate under full DC-link voltage conditions (282 V) [38].In the presented investigations the concept of the series active filter for a 3×400 V,

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Mitigation techniques of conducted emi in multilevel inverter drives

Cited by 4 publications

References 6 publications

Sensorless control of induction motors using multi-level converters

Sensorless control of induction motors using multi-level converters

Sensorless control of high power induction motors using multilevel converters

Compensation of Interference Sources Inside Power Electronic Interfaces

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