EPE Association: EPE 2015 - DS3f: Motion Control, Robotics, Special Drives

EPE 2015 - DS3f: Motion Control, Robotics, Special Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 04: Electrical Machines and Drive Systems > EPE 2015 - DS3f: Motion Control, Robotics, Special Drives

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   Asymmetrical Multilevel Inverter with Staircase Modulation for Variable Frequency Drives in Fractional Horsepower Applications
By Jesus Sergio ARTAL-SEVIL [View]
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Abstract: Nowadays, the great use of small induction motors in domestic applications and other industrial applications justify the development of new servo-drives and motor designs. The main objective should be to improve the efficiency and to consume energy with a clean absorption of current harmonic from the mains. Thereby, this paper presents an application for the speed control of a small single/two phase induction motor. A new topology of cascaded multilevel inverter together with several half-bridge cells in series using a reduced number of switches and insulated gate driver circuits is proposed. Hybrid multilevel converter is controlled through a staircase modulation in order to minimize the switching losses. Waveforms generated by the system are composed in the motor windings to obtain a voltage with variable amplitude and frequency; the objective is to supply small electric power drives. The two parameters of the waveforms -amplitude and frequency- in the motor winding are easily regulated through the phase shift. The staircase modulation can be easily implemented in the multilevel inverter due to its unique structure and relatively simple control. Compared with the carrier-based PWM schemes, the staircase modulation is characterized by low switching losses since all the elements operate at the fundamental frequency. This new drive provides advantages as a straightforward control method, simplicity of the design, easily regulated starting torque and its low cost. As a whole, the design leads to a robust, compact, cheap unit, easy to manufacture. In summary, a new control type for angle phase is proposed through the staircase modulation for adjustable speed drive in fractional horsepower small single/two-phase induction motors.

   Real-time Position Sensorless Estimation of Position and Force of Solenoid Actuator for Haptic Devices
By Sakahisa NAGAI [View]
[Download]

Abstract: Haptic devices are receiving a lot of attention, especially in robotics and medical field. Position and force of actuators are needed to communicate the haptic information. This paper aims to realize sensorless estimation of position and force of solenoid actuators for haptic devices. The simultaneous estimation of position and force is conducted by applying DC and superposed AC voltage to the solenoid actuator. From the DC signals, the force is estimated. From the AC signals, the position is estimated. Experiments of the estimation were conducted to validate this proposal. The proposal succeeded in realizing high precision position estimation with an accuracy of 50 µm. The simultaneous estimation of the position and force was accurately achieved in real time. This technique is useful, as the application field of the solenoid actuators is enhanced.

   Sensorless Pump Control Strategy for Hydraulic Systems of Heating Applications Driven by Robust Encoderless PMSM Drive
By Martin SIROVY [View]
[Download]

Abstract: The paper presents developed algorithms for energy efficient sensorless control of pump for hydraulic systems of heating applications. It is presented the complex solution including both robust encoderless PMSM drive control and intelligent master control of hydraulic performance of the pump ensuring transformation of the pump natural hydraulic curve which leads to significant energy savings in the heating applications. Proposed solution has been proved on the laboratory model of the heating system. Achieved results and comparison to fixed speed heating pump are presented including limitations of the developed algorithm and perspective ways of further research.

   Simultaneous Thrust and Attractive force Control of Linear Induction Motor Driven by Power Source with Frequency Component Synchronous with Motor Speed
By Toshimitsu MORIZANE [View]
[Download]

Abstract: In this paper, a novel maglev transportation system of the Linear Induction Motor (LIM) is introduced. It is proposed that two different frequency components are used to achieve the simultaneous and independent thrust and attractive force control of the LIM. One of the frequency components is synchronous with motor (fm) that is used to control the levitation of LIM. The other frequency is drive frequency (fd) that generates the traction force of LIM. The proposed control method makes the design of the controller more easily, because fm frequency component produces only attractive force. Hence, the controller for thrust force and the controller for attractive force can be independent separately in the proposed system. This paper especially analyzes the proposed method by the simulation and the experimental results.

EPE 2015 - DS3f: Motion Control, Robotics, Special Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 04: Electrical Machines and Drive Systems > EPE 2015 - DS3f: Motion Control, Robotics, Special Drives
	[return to parent folder]

	Asymmetrical Multilevel Inverter with Staircase Modulation for Variable Frequency Drives in Fractional Horsepower Applications By Jesus Sergio ARTAL-SEVIL	[View] [Download]
Abstract: Nowadays, the great use of small induction motors in domestic applications and other industrial applications justify the development of new servo-drives and motor designs. The main objective should be to improve the efficiency and to consume energy with a clean absorption of current harmonic from the mains. Thereby, this paper presents an application for the speed control of a small single/two phase induction motor. A new topology of cascaded multilevel inverter together with several half-bridge cells in series using a reduced number of switches and insulated gate driver circuits is proposed. Hybrid multilevel converter is controlled through a staircase modulation in order to minimize the switching losses. Waveforms generated by the system are composed in the motor windings to obtain a voltage with variable amplitude and frequency; the objective is to supply small electric power drives. The two parameters of the waveforms -amplitude and frequency- in the motor winding are easily regulated through the phase shift. The staircase modulation can be easily implemented in the multilevel inverter due to its unique structure and relatively simple control. Compared with the carrier-based PWM schemes, the staircase modulation is characterized by low switching losses since all the elements operate at the fundamental frequency. This new drive provides advantages as a straightforward control method, simplicity of the design, easily regulated starting torque and its low cost. As a whole, the design leads to a robust, compact, cheap unit, easy to manufacture. In summary, a new control type for angle phase is proposed through the staircase modulation for adjustable speed drive in fractional horsepower small single/two-phase induction motors.

	Real-time Position Sensorless Estimation of Position and Force of Solenoid Actuator for Haptic Devices By Sakahisa NAGAI	[View] [Download]
Abstract: Haptic devices are receiving a lot of attention, especially in robotics and medical field. Position and force of actuators are needed to communicate the haptic information. This paper aims to realize sensorless estimation of position and force of solenoid actuators for haptic devices. The simultaneous estimation of position and force is conducted by applying DC and superposed AC voltage to the solenoid actuator. From the DC signals, the force is estimated. From the AC signals, the position is estimated. Experiments of the estimation were conducted to validate this proposal. The proposal succeeded in realizing high precision position estimation with an accuracy of 50 µm. The simultaneous estimation of the position and force was accurately achieved in real time. This technique is useful, as the application field of the solenoid actuators is enhanced.

	Sensorless Pump Control Strategy for Hydraulic Systems of Heating Applications Driven by Robust Encoderless PMSM Drive By Martin SIROVY	[View] [Download]
Abstract: The paper presents developed algorithms for energy efficient sensorless control of pump for hydraulic systems of heating applications. It is presented the complex solution including both robust encoderless PMSM drive control and intelligent master control of hydraulic performance of the pump ensuring transformation of the pump natural hydraulic curve which leads to significant energy savings in the heating applications. Proposed solution has been proved on the laboratory model of the heating system. Achieved results and comparison to fixed speed heating pump are presented including limitations of the developed algorithm and perspective ways of further research.

	Simultaneous Thrust and Attractive force Control of Linear Induction Motor Driven by Power Source with Frequency Component Synchronous with Motor Speed By Toshimitsu MORIZANE	[View] [Download]
Abstract: In this paper, a novel maglev transportation system of the Linear Induction Motor (LIM) is introduced. It is proposed that two different frequency components are used to achieve the simultaneous and independent thrust and attractive force control of the LIM. One of the frequency components is synchronous with motor (fm) that is used to control the levitation of LIM. The other frequency is drive frequency (fd) that generates the traction force of LIM. The proposed control method makes the design of the controller more easily, because fm frequency component produces only attractive force. Hence, the controller for thrust force and the controller for attractive force can be independent separately in the proposed system. This paper especially analyzes the proposed method by the simulation and the experimental results.