US5708346A — Method and control apparatus for controlling an A…

Claim 1

Independent Claim 328 words

A method for controlling an AC-machine having a rotor and a stator that includes a stator winding for combined generation of a torque and a transverse force F which acts perpendicular to the rotor and whose magnitude and direction can be adjusted as desired, the stator winding including a drive winding with a pole pair number p 1 and a control winding with a pole pair number p 2 that is defined by p 2 =p 1 ±1, wherein the drive winding of the stator winding is supplied with a drive current i S1 for generating a drive flux which can be represented in an electrical p 1 -plane by its magnitude and its argument, the p 1 -plane being associated with the pole pair number p 1 of the drive winding, and the control winding of the stator winding is supplied with a control current i S2 independently of the drive current i S1 , which control current i S2 generates a control flux which can be represented in an electrical p 2 -plane by its magnitude and its argument, the p 2 -plane being associated with the pole pair number p 2 of the control winding, the method comprising the steps of a) determining an argument γ S .sup.(p1) of the drive flux in the p 1 -plane, b) determining, in a coordinate system (T) that is rotating with an angle that corresponds to said argument γ S .sup.(p1) of the drive flux, the control current i S2 * (T,p2) in the p 2 -plane necessary for a desired transverse force F*, c) transforming said control current i S2 * (T,p2) by a coordinate rotation about a rotation angle p.sup.(p2) into a coordinate system (S) fixed to the stator, said rotation angle being defined by p.sup.(p2) =p o .sup.(p2) +γ S .sup.(p1) wherein p o .sup.(p2) denotes a constant angle describing a given relative rotation between the control winding and the drive winding in the stator.

Claim 2

Independent Claim 328 words

A method for controlling an AC-machine having a rotor and a stator that includes a stator winding for combined generation of a torque and a transverse force F which acts perpendicular to the rotor and whose magnitude and direction can be adjusted as desired, the stator winding including a drive winding with a pole pair number p 1 and a control winding with a pole pair number p 2 that is defined by p 2 =p 1 ±1, wherein the drive winding of the stator winding is supplied with a drive current i S1 for generating a drive flux which can be represented in an electrical p 1 -plane by its magnitude and its argument, the p 1 -plane being associated with the pole pair number p 1 of the drive winding, and the control winding of the stator winding is supplied with a control current i S2 independently of the drive current i S1 , which control current i S2 generates a control flux which can be represented in an electrical p 2 -plane by its magnitude and its argument, the p 2 -plane being associated with the pole pair number p 2 of the control winding, the method comprising the steps of a) determining an argument γ S .sup.(p1) of the drive flux in the p 1 -plane, b) determining, in a coordinate system (T) that is rotating with an angle that corresponds to said argument γ S .sup.(p1) of the drive flux, the control current i S2 * (T,p2) in the p 2 -plane necessary for a desired transverse force F*, c) transforming said control current i S2 * (T,p2) by a coordinate rotation about a rotation angle p.sup.(p2) into a coordinate system (S) fixed to the stator, said rotation angle being defined by p.sup.(p2) =p o .sup.(p2) +γ S .sup.(p1) wherein p o .sup.(p2) denotes a constant angle describing a given relative rotation between the control winding and the drive winding in the stator.

Claim 3

Dependent Claim 89 words

A method in accordance with claim 1, wherein the control current i S2 * (T,p2) in the coordinate system (T) is determined component-wise as a vector ##EQU20## in accordance with the relationships defined by ##EQU21## where i) desired force vector ##EQU22## ii) i S1q .sup.(F,p1) is a torque-forming drive current component in flow coordinates in the p 1 -plane, iii) ψ 1 is a magnitude of the drive flux, and iv) L 2 , K Fx , K Fy , K Sx , and K Sy are machine parameters.

Claim 4

Dependent Claim 53 words

A method in accordance with claim 2, wherein parameters corresponding to magnitude ψ 1 of the drive flux, argument γ S .sup.(p1) of the drive flux and the torque-forming drive current i S1q .sup.(p1) are computed with the aid of machine equations from measurement parameters and from observed parameters and corresponding desired values.

Claim 5

Dependent Claim 55 words

A method in accordance with claim 2, wherein parameters corresponding to magnitude ψ 1 of the drive flux, argument γ S .sup.(p1) of the drive flux and the torque-forming drive current i S1q .sup.(p1) are computed with the aid of machine equations from either measurement parameters or from observed parameters or from corresponding desired values.

Claim 6

Dependent Claim 62 words

A method in accordance with claim 1, wherein the control current i S2 * (T,p2) is determined component-wise in the coordinate system (T) as the vector ##EQU23## in accordance with the simplified relationships defined by ##EQU24## where i) desired force vector ##EQU25## ii) ψ 1 is a magnitude of the drive flux, and iii) K Fx and K Fy are machine parameters.

Claim 7

Dependent Claim 90 words

A method in accordance with claim 1, wherein a transverse force vector regulation is superimposed on a transverse force vector control of the AC-machine, with the actual value of the transverse force vector being directly measured by force sensors or determined from other measurement parameters via a means for parameter identification, and subsequently being compared with a desired value to obtain a control deviation, the control deviation being supplied to a regulator and the regulator output being connected to the control input of the AC-machine for the transverse force control.

Claim 8

Dependent Claim 114 words

A method in accordance with claim 1, wherein a regulation of rotor position is superimposed on a transverse force vector control of the AC-machine with an actual value of the position (in the x-direction and in the y-direction) being directly measured by distance sensors or being determined from other measured parameters via a means for parameter identification, and subsequently being compared with a desired value (in the x-direction and in the y-direction) to obtain a control deviation, with the control deviation (in the x-direction and in the y-direction) being supplied to a regulator and with an output of the regulator being connected to a control input of the AC-machine for the transverse force control.

Claim 9

Dependent Claim 33 words

A method in accordance with claim 1, wherein, with the aid of transverse force vector control, forces are exerted on the rotor via which the bending deflection of the rotor is statically influenced.

Claim 10

Dependent Claim 43 words

A method in accordance with claim 1, wherein, with the aid of transverse force vector control, forces are exerted on the rotor via which eigen or self oscillations of the rotor are passively and/or actively damped, excited or influenced in some other manner.

Claim 11

Dependent Claim 33 words

A method in accordance with claim 1, wherein, with the aid of transverse force vector control, forces are exerted on the rotor via which the bending deflection of the rotor is dynamically influenced.

Claim 12

Dependent Claim 18 words

A method in accordance with claim 10, wherein the bending deflection of the rotor is also dynamically influenced.

Claim 13

Dependent Claim 32 words

A method in accordance with claim 1 wherein parameters corresponding to magnitude ψ 1 of the drive flux and argument γ S .sup.(p1) of the drive flux are determined by flux measurement.

Claim 14

Dependent Claim 33 words

A method in accordance with claim 1 wherein parameters corresponding to magnitude ψ 1 of the drive flux and argument γ S .sup.(p1) of the drive flux are determined by partial flux measurement.

Claim 15

Dependent Claim 296 words

Apparatus for controlling an AC-machine, the AC-machine having a rotor and a stator that includes a stator winding for combined generation of a torque and a transverse force F which acts perpendicular to the rotor and whose magnitude and direction can be adjusted as desired, the stator winding including a drive winding with a pole pair number p 1 and a control winding with a pole pair number p 2 that is defined by p 2 =p 1 ±1, wherein the drive winding of the stator winding is supplied with a drive current i S1 for generating a drive flux which can be represented in an electrical p 1 -plane by its magnitude and its argument, the p 1 -plane being associated with the pole pair number p 1 of the drive winding, and the control winding of the stator winding is supplied with a control current i S2 independently of the drive current i S1 , which control current i S2 generates a control flux which can be represented in an electrical p 2 -plane by its magnitude and its argument, the p 2 -plane being associated with the pole pair number p 2 of the control winding, the apparatus comprising: a) a current supply module for supplying a control winding, and a supply module for supplying a drive winding, b) a signal processing module in which i) parameters γ S .sup.(p1), defined as an argument of the drive flux in the p 1 -plane, 4 1 , defined as the magnitude of the drive flux, are determined, ii) a desired value for the control current i S2 * (T,p2) is determined, and iii) the control current i S2 * (T,p2) serves as a desired value of the current supply module for the control winding.

Claim 16

Dependent Claim 296 words

Apparatus for controlling an AC-machine, the AC-machine having a rotor and a stator that includes a stator winding for combined generation of a torque and a transverse force F which acts perpendicular to the rotor and whose magnitude and direction can be adjusted as desired, the stator winding including a drive winding with a pole pair number p 1 and a control winding with a pole pair number p 2 that is defined by p 2 =p 1 ±1, wherein the drive winding of the stator winding is supplied with a drive current i S1 for generating a drive flux which can be represented in an electrical p 1 -plane by its magnitude and its argument, the p 1 -plane being associated with the pole pair number p 1 of the drive winding, and the control winding of the stator winding is supplied with a control current i S2 independently of the drive current i S1 , which control current i S2 generates a control flux which can be represented in an electrical p 2 -plane by its magnitude and its argument, the p 2 -plane being associated with the pole pair number p 2 of the control winding, the apparatus comprising: a) a current supply module for supplying a control winding, and a supply module for supplying a drive winding, b) a signal processing module in which i) parameters γ S .sup.(p1), defined as an argument of the drive flux in the p 1 -plane, 4 1 , defined as the magnitude of the drive flux, are determined, ii) a desired value for the control current i S2 * (T,p2) is determined, and iii) the control current i S2 * (T,p2) serves as a desired value of the current supply module for the control winding.

Claim 17

Dependent Claim 44 words

Apparatus for controlling an AC-machine in accordance with claim 14 wherein the supply module of the drive winding includes a control apparatus via which the torque or the speed of rotation and also the drive flux of the machine can be adjusted as desired.

Claim 18

Dependent Claim 22 words

Apparatus for controlling an AC-machine in accordance with claim 15, wherein the control apparatus operates in accordance with a characteristic control method.

Claim 19

Dependent Claim 23 words

Apparatus for controlling an AC-machine in accordance with claim 15, wherein the control apparatus operates in accordance with a field oriented control method.

Claim 20

Dependent Claim 45 words

Apparatus for controlling an AC-machine in accordance with claim 14 comprising additional means for transverse force vector control which include: a) force sensors or a status observer for determining an actual value of the transverse force, and b) a regulator for regulating the transverse force.

Claim 21

Dependent Claim 42 words

Apparatus for controlling an AC-machine in accordance with claim 14 comprising additional means for the transverse force vector regulation, which include: a) position sensors or a status observer for determining the rotor position, and b) a regulator for regulating the rotor position.

Claim 22

Dependent Claim 50 words

Apparatus for controlling an AC machine in accordance with claim 14, comprising additional means for requlating bending deflection of the rotor, which include: a) position sensors or a status observer for determining the bending deflection of the rotor, and b) a regulator for regulating the bending deflection of the rotor.

Claim 23

Dependent Claim 44 words

Apparatus for controlling an AC-machine in accordance with claim 14, comprising additional means for damping self oscillations of the rotor, which include: a) sensors or a status observer for determining oscillations of the rotor, and b) a regulator for regulating out the rotor oscillations.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2001-01-12	2001-07-14	2002-01-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2005-01-12	2005-07-14	2006-01-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2009-01-12	2009-07-14	2010-01-13	$7700.00	Window Closed / Lapsed

Method and control apparatus for controlling an AC-machine

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