Method and device for controlling a sensorless field-oriented as

Details Method and device for controlling a sensorless field-oriented as Method and device for controlling a sensorless field-oriented as

1998-06-08

1999-11-30

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

'reset' systems

318803, G05B 1136

Patent

active

059948671

ABSTRACT:
A method and a device for controlling a sensorless, field-oriented asynchronous machine, wherein a manipulated variable space vector and a stator frequency are calculated, by means of a two-component current control system, from which control signals are generated using a space vector modulation process. A PI controller of an EMF control system for the d-component of a calculated EMR space vector of the field-oriented control system is deactivated and its output signal set to zero at a stator frequency, determined as a function of a calculated d-component of a calculated EMF space vector and a calculated stator frequency, that is less than or equal to a first limit frequency. Thus, the method may be used for speed control of a sensorless, field-oriented asynchronous machine down to a full stop.

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W. Zimmerman, "High-Dynamic AC Machine Control without Spped or Position Sensor," Jan./Feb. 1997, ETEP, vol. 6, No. 1, pp. 47-51.
Dr. F. Blaschke, "Regelverfahren fur Drehfeldmaschinen," VDI Bildungswerk, May 13, 1976, pp. 1-19. An English translation is provided.
von F. Blaschke, "Feldorientierjung der geberlosen Drehfeldmaschine," [Field-orientation for Sensorless Rotating Field Machines], etz, Issue 21, 1995, pp. 14-23. Described in the specification of the above-identified application.

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