IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0567306
(2004-07-15)
|
등록번호 |
US-7746039
(2010-07-19)
|
우선권정보 |
DE-103 36 068(2003-08-06) |
국제출원번호 |
PCT/EP2004/007925
(2004-07-15)
|
§371/§102 date |
20071031
(20071031)
|
국제공개번호 |
WO05/018086
(2005-02-24)
|
발명자
/ 주소 |
- Hoffmann, Frank
- Sperr, Franz
- Stanke, Georg
|
출원인 / 주소 |
- Siemens Aktiengesellschaft
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
10 |
초록
▼
The invention relates to a method for the controlled application of a stator-current target value (ISnom) and a torque target value (Mnom) for a polyphase machine (4) that is supplied by an electronic power converter. According to the invention: current components (ISdnom, ISqnom) in a co-ordinate s
The invention relates to a method for the controlled application of a stator-current target value (ISnom) and a torque target value (Mnom) for a polyphase machine (4) that is supplied by an electronic power converter. According to the invention: current components (ISdnom, ISqnom) in a co-ordinate system (d, q) with a fixed rotor flux or rotating magnetic pole are calculated in accordance with a torque target value and in asynchronous machines in accordance with a rotor-flux target value (ψRnom), a calculated rotor-flux actual value (ψ<SB>R</SB>) or a rotating magnetic-pole flux; a stator-circuit frequency (ω<SB>S</SB>) is determined; a terminal-flux target value (ψKnom) is calculated in accordance with the values (ISnom, ISqnom, ψ<SB>R</SB>, ω<SB>S</SB>) by means of the machine parameters (L, R<SB>S</SB>), said terminal-flux target value being subsequently projected onto a flux-course curve, selected from stored, off-line optimised flux-course curves. This permits the state of the stator current (I<SB>S</SB>) to be regulated in relation to the rotor flux (ψ<SB>R</SB>) or rotating magnetic-pole flux by means of momentary values, facilitating a stationary and dynamic precise control of motor currents (I1,I2,I3) and thus the torques (M) of a polyphase machine (4).
대표청구항
▼
The invention claimed is: 1. A method for applying a controlled stator current set point value and a controlled torque set point value to a converter-fed rotating-field machine, comprising: computing a field-forming current component of the stator current set point value as a function of a predeter
The invention claimed is: 1. A method for applying a controlled stator current set point value and a controlled torque set point value to a converter-fed rotating-field machine, comprising: computing a field-forming current component of the stator current set point value as a function of a predetermined rotor flux set point value and a measured actual rotor flux value; computing a torque-forming current component of the stator current set point value as a function of a predetermined torque set point value, the measured actual rotor flux value and a measured torque-forming current component of a measured stator current; determining an actual stator angular frequency value as a function of a measured rotor slip frequency and of an angular frequency; by using a frequency-dependent stray inductance and a stator resistance as parameters, computing the integral the stator voltage as a manipulated variable from the computed values of the field-forming current component, the torque-forming current component, the actual stator angular frequency, and the measured rotor slip frequency; and deriving from the integral of the stator voltage a flux path curve which is selected from optimized flux path curves stored off-line. 2. The method of claim 1, further comprising the step of computing as a function of the computed field-forming current component and the torque-forming current component, of the parameters frequency-dependent stray inductance and the stator resistance, of the actual stator angular frequency, and of the actual rotor flux value a normalized steady-state stator voltage, which is normalized based on a measured intermediate circuit voltage. 3. The method of claim 1, wherein an actual terminal flux value is determined by before integrating the stator voltage, subtracting a voltage drop caused by the instantaneous stator current across the stator resistance, and after integrating the stator voltage and after transformation into a coordinate system, which is synchronized with the rotor flux, adding a voltage drop across the stator resistance caused by the set point value of the stator current, divided by the actual stator angular frequency. 4. The method of claim 2, and further computing from the normalized steady-state stator voltage in form of polar components a drive level and a voltage angle. 5. The method of claim 4, and further computing from the computed drive level a magnitude of a terminal flux at the computed fundamental actual stator angular frequency as a function of the measured intermediate circuit voltage using the following equation: Ψ _ K = a · U D · 2 π ω S wherein ψK is the terminal flux, a is the computed drive level, UD is the intermediate circuit voltage, and ωS is the stator angular frequency. 6. The method of claim 2, and further comprising the steps of determining a continuous rotor flux angle; determining an angle between the terminal flux and the rotor flux; computing from the determined continuous rotor flux angle and the determined angle between the terminal flux and the rotor flux a continuous nominal terminal flux angle using the following equation: γΨKnom=γΨR+δΨK wherein γψKnom is the continuous nominal terminal flux angle, γψR is the rotor flux angle, and δψK is the angle between the terminal flux and the rotor flux. 7. The method of claim 4, wherein the polar voltage angle is computed using the following equation: δ U = arcsin U Sdstead a · U D · 2 / π + 90 ° wherein δU is the polar voltage angle, USdstead is the torque-forming component of the normalized steady-state stator voltage, a is the computed drive level, and UD is the intermediate circuit voltage. 8. The method of claim 3, wherein the angle between a terminal flux and the rotor flux is computed using the following equation: δ Ψ K = δ u - 90 ° = arcsin U sdstead a · U D · 2 / π wherein δψK is the angle between the terminal flux and the rotor flux, δU is the polar voltage angle, USdstead is the torque-forming component of the normalized steady-state stator voltage, a is the computed drive level, and UD is the intermediate circuit voltage.
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