EPE Association: EPE 1987 - 18 - Lecture Session 2.4: SIGNAL PROCESSING (IV)

EPE 1987 - 18 - Lecture Session 2.4: SIGNAL PROCESSING (IV)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 18 - Lecture Session 2.4: SIGNAL PROCESSING (IV)

   [return to parent folder]

   FEATURES OF U-PROCESSOR BASED INDUSTRIAL DRIVE SYSTEMS
By P. Mutschler; M. Voits [View]
[Download]

Abstract: Several new features are introduced in industrial microprocessor controlled drives. The tasks which have to be executed by the drive controller are explained using a new developed based dc-drive as an example. A flexible adaption to specific industrial applications is provided by using software function blocks. The microprocessor gives the chance for improved diagnostic functions. Self-test, fault detection and indication help in service, testing and troubleshooting. Man-machine communication is supported by local or remote devices. The new drive controller can work within an industrial communication network. With these new features, a drive became an autonomous and intelligent component in an automation system.

   APPLICATION OF A PROGRAMMABLE HIGH-SPEED CONTROLLER (PHSC) TO THE SIMULATION OF A DIRECT SELF CONTROLLED VSI-FED INDUCTION MOTOR
By A. Rufer [View]
[Download]

Abstract: The programmable high-speed controller (PHSC) has been used for numerical simulation of a VSI-fed-Induction-Motor drive. The motor is represented in the alpha/betastator reference frame together with the Voltage Source Inverter. Optimal performance is reached by using a new Direct Self Control (DSC) strategy also called "Depenbrock" method. The very fast numerical simulation allows to study the behaviour of the system with 100-times slow-motion representation. A description of the simulation method, of the new control strategy and a complete set of simulation results are presented.

   On Stochastic Filtering Techniques and its Applications to AC Numerical Drive Systems
By A. M. N. Lima; B. de Fornel; M. Pietrzak-David [View]
[Download]

Abstract: A systematic study about the use of stochastic filtering technique on ac numerical drive systems is proposed. The mathematical process modeling and the implementation details are discussed. Considering its optimal properties, the Kalman & Bucy algorithm is chosen as filter structure for the system. A linear discrete model for the induction motor and a schema for direct flux control is then presented.

   MICROPROCESSOR BASED CONTROL CIRCUIT FOR DC SERVO DRIVE
By V. Casellato; E. Dallago; D. Dotti [View]
[Download]

Abstract: In this paper some implementation solutions are presented with reference to drive of DC motors, based on dedicated microprocessor system. The servo drive consists of low inertia moving coil motor, controlled through a four quadrant chopper and monitored by means of tachometer, incremental encoder and current transducer. A microcomputer system, based on Z80A, supersides all the operations allowing the operator to control rotation speed, position reaching and balance holding. It also checks that a predefined current threshold is not exceeded.

   MICROPROCESSOR-CONTROLLED SERVO-MOTOR WITH ELECTRONIC COMMUTATION AND COMPARISON OF LOSSES AT DIFFERENT WAVEFORMS OF CURRENT
By Werner Demel; Philipp Klaus Sattler [View]
[Download]

Abstract: This paper deals with synchronous servo-motors with SmCo permanent magnets and compares the supplies having sinusoidal or rectangular waveform of the currents with respect to the losses, temperature and size of the motors. A sinusoidal and rectangular shape of the air gap flux density is considered additionally and the following motor operations are then under consideration:
a) rectangular current and air gap flux density (rectangular operation)
b) sinusoidal current and rectangular air gap flux density (mixed operation)
c) sinusoidal current and air gap flux-density (sinusoidal operation)
The paper illustrates that considerable losses arise in the permanent magnet by eddy currents which depend on current waveform. A special motor with a heat pipe in the shaft is presented which makes possible a better cooling of the magnets and enables a remarkable increase of rated power. Furthermore this type allows the use of the magnet material NdFeB which is very sensitive on heating.

EPE 1987 - 18 - Lecture Session 2.4: SIGNAL PROCESSING (IV)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 18 - Lecture Session 2.4: SIGNAL PROCESSING (IV)
	[return to parent folder]

	FEATURES OF U-PROCESSOR BASED INDUSTRIAL DRIVE SYSTEMS By P. Mutschler; M. Voits	[View] [Download]
Abstract: Several new features are introduced in industrial microprocessor controlled drives. The tasks which have to be executed by the drive controller are explained using a new developed based dc-drive as an example. A flexible adaption to specific industrial applications is provided by using software function blocks. The microprocessor gives the chance for improved diagnostic functions. Self-test, fault detection and indication help in service, testing and troubleshooting. Man-machine communication is supported by local or remote devices. The new drive controller can work within an industrial communication network. With these new features, a drive became an autonomous and intelligent component in an automation system.

	APPLICATION OF A PROGRAMMABLE HIGH-SPEED CONTROLLER (PHSC) TO THE SIMULATION OF A DIRECT SELF CONTROLLED VSI-FED INDUCTION MOTOR By A. Rufer	[View] [Download]
Abstract: The programmable high-speed controller (PHSC) has been used for numerical simulation of a VSI-fed-Induction-Motor drive. The motor is represented in the alpha/betastator reference frame together with the Voltage Source Inverter. Optimal performance is reached by using a new Direct Self Control (DSC) strategy also called "Depenbrock" method. The very fast numerical simulation allows to study the behaviour of the system with 100-times slow-motion representation. A description of the simulation method, of the new control strategy and a complete set of simulation results are presented.

	On Stochastic Filtering Techniques and its Applications to AC Numerical Drive Systems By A. M. N. Lima; B. de Fornel; M. Pietrzak-David	[View] [Download]
Abstract: A systematic study about the use of stochastic filtering technique on ac numerical drive systems is proposed. The mathematical process modeling and the implementation details are discussed. Considering its optimal properties, the Kalman & Bucy algorithm is chosen as filter structure for the system. A linear discrete model for the induction motor and a schema for direct flux control is then presented.

	MICROPROCESSOR BASED CONTROL CIRCUIT FOR DC SERVO DRIVE By V. Casellato; E. Dallago; D. Dotti	[View] [Download]
Abstract: In this paper some implementation solutions are presented with reference to drive of DC motors, based on dedicated microprocessor system. The servo drive consists of low inertia moving coil motor, controlled through a four quadrant chopper and monitored by means of tachometer, incremental encoder and current transducer. A microcomputer system, based on Z80A, supersides all the operations allowing the operator to control rotation speed, position reaching and balance holding. It also checks that a predefined current threshold is not exceeded.

	MICROPROCESSOR-CONTROLLED SERVO-MOTOR WITH ELECTRONIC COMMUTATION AND COMPARISON OF LOSSES AT DIFFERENT WAVEFORMS OF CURRENT By Werner Demel; Philipp Klaus Sattler	[View] [Download]
Abstract: This paper deals with synchronous servo-motors with SmCo permanent magnets and compares the supplies having sinusoidal or rectangular waveform of the currents with respect to the losses, temperature and size of the motors. A sinusoidal and rectangular shape of the air gap flux density is considered additionally and the following motor operations are then under consideration: a) rectangular current and air gap flux density (rectangular operation) b) sinusoidal current and rectangular air gap flux density (mixed operation) c) sinusoidal current and air gap flux-density (sinusoidal operation) The paper illustrates that considerable losses arise in the permanent magnet by eddy currents which depend on current waveform. A special motor with a heat pipe in the shaft is presented which makes possible a better cooling of the magnets and enables a remarkable increase of rated power. Furthermore this type allows the use of the magnet material NdFeB which is very sensitive on heating.