Boots – shoes – and leggings
Patent
1991-11-27
1994-04-26
Smith, Jerry
Boots, shoes, and leggings
364148, 318799, 363 36, H02P 540
Patent
active
053072596
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a process for compensating a phase and amplitude response between a multiphase setpoint and actual value and circuit for implementing the process.
Specifying a command variable W, for example in accordance with a timing function W(t)=W sin (.alpha.t) on a known control loop consisting of setpoint adjuster, comparator, controller, controlled system and measuring transducer produces in the controlled variable a phase and amplitude shift in relation to the command variable W. With increasing frequency of the command variable W, the phase and amplitude response varies between setpoint and actual value. An undesired phase and amplitude response between setpoint and actual value is also produced in the case of multiphase control loops. A multiphase control loop represents, for example, a conventional current control for a three-phase current drive with voltage-controlled convertor. The amplitude and phase of actual value can be measured or determined without distortion in this multiphase control loop.
The phase and amplitude response is determined by the response characteristic of the control loop. If this response characteristic is known, the phase and amplitude response of the control loop can be compensated by a correction device in the command channel. If, by contrast, the response characteristic of the controlled system is a function of the disturbance variable or dependent on controlled variables which are not known or cannot be measured, the said type of phase and amplitude response can be compensated only insufficiently by means of a correction device in the command channel.
The textbook "Stromrichter zur Drehzahlsteuerung von Drehfeldmaschinen" (Static convertors for speed control of polyphase machines), Part III, Convertors, by Erich Eder, 1975, pages 102 to 111 discloses resolvers by means of which a two-phase system having two orthogonal currents is formed from a three-phase system. A current vector which rotates can be formed from these two orthogonal currents. The modulus of this current vector and the rotary angle are formed by means of a C/P transformer (Cartesian/polar).
SUMMARY OF THE INVENTION
It is the object of the invention to specify a process for compensating a phase and amplitude response between a multiphase setpoint and actual value, the phase and amplitude response being produced by a response characteristic of a controlled system which depends on a disturbance variable, and a circuit arrangement for implementing this process according to the invention.
This object is attained by a process for compensating a phase and amplitude response between a multiphase setpoint and an actual value (i.sub.Rw, i.sub.Sw, i.sub.Tw and i.sub.Rx, i.sub.Sx, i.sub.Tx) consisting of the following steps: and a rotary angular setpoint value (.epsilon..sub.w) of a setpoint value vector (i.sub.w) formed from the multiphase setpoint value (i.sub.Rw, i.sub.Sw, i.sub.Tw), and a rotary angular actual value (.epsilon..sub.x) of an actual value vector (i.sub.x) formed from the multiphase actual value (i.sub.Rx, i.sub.Sx, i.sub.Tx), with the modulus actual value (.vertline.i.sub.w .vertline.) from whose modulus differential value (.vertline.i.sub.w .vertline.)-.vertline.i.sub.x .vertline.) there is generated a modulus manipulated variable (.vertline.i.sub.wxy .vertline.) which when added to the modulus setpoint value (.vertline.i.sub.w .vertline.) produces a compensating modulus setpoint value (.vertline.i.sub..sub.K.sup.w .vertline.), the rotary angular actual value (.epsilon..sub.x) from whose angular differential value (.epsilon..sub.w -.epsilon..sub.x) there is generated an angular setpoint value (.epsilon..sub.wxy) which when added to the angular setpoint value (.epsilon..sub.w) produces a compensating angular setpoint value (.epsilon..sub.Kw), i.sub.SKw i.sub.TKw) of the compensating setpoint value vector (i) formed from the compensating modulus setpoint value (.vertline.i.sub.K.sup.w .vertline.), and the compensating rotary angular setpoint value (.epsi
REFERENCES:
patent: 4238715 (1980-12-01), Parsch et al.
patent: 4418308 (1983-11-01), Bose
patent: 4451771 (1984-05-01), Nagase et al.
IECON '84 Proceedings, 1984 Int. Conf. on Ind. Elec. Cont. and Instr., vol. 1, Oct. 26, 1984, IEEE, New York, U.S., pp. 572-574; T. Kuga et al.: "Sinusoidal Cyclo-Converter for Mine Hoist Drive".
Erich Eder: "Stromrichter zur Drehzahlsteuerung von Drehfeldmaschinen", Part 3, Umrichter, 1975, pp. 102-111.
Hugel Harald
Schwesig Gunter
Garland Steven R.
Siemens Aktiengesellschaft
Smith Jerry
LandOfFree
Process for compensating a phase and amplitude response between does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for compensating a phase and amplitude response between , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for compensating a phase and amplitude response between will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1716397