A Method for Observing Rotor Radial Offset of Bearingless Flux Switching Motor
A magnetic flux switching motor and bearingless technology, which is applied in the direction of electronically commutated motor control, electronic commutator, motor control, etc., can solve the problems of reducing the reliability of drive control, increasing the cost of drive system hardware, and high sensor cost. The effect of reducing connection, improving precision and reducing cost
Active Publication Date: 2019-04-02
FUZHOU UNIV
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Problems solved by technology
Obviously, this direct measurement method has the following disadvantages: 1) The cost of the sensor is high, which increases the hardware cost of the entire drive system; 2) There is a weak current connection between the sensor and the drive controller, which reduces the reliability of the drive control
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[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0041] Such as figure 1Shown is a schematic diagram of a bearingless flux switching motor, which adopts a power and suspension double-winding structure. A, B, and C are three-phase power windings, and a, b, and c are three-phase suspension windings. After deducting the suspension winding, the cross-section of the motor Same as the usual stator permanent magnet flux switching motor, the stator is also composed of 12 U-shaped iron core punches 1, and a tangentially magnetized magnet is sandwiched between two adjacent U-shaped iron core punches 1. permanent magnet 2. In order to reduce the magnetic saturation degree of the iron core and facilitate the modulation of the air gap magnetic field, the height of the permanent magnet along the radial direction is reduced. The 12 coils constituting the three-phase suspension winding are arranged end to end accor...
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The invention relates to a rotor radial offset observation method for a bearing-less magnetic flux switching motor. Rotor radial offset required in a suspension control algorithm is replaced by observation values <delta>x and <delta>y to realize radial-displacement-sensor-free control of the bearing-less magnetic flux switching motor, so that reliability of suspension control is improved. In a driving system adopting full digital control, the rotor radial offset observation method is adopted, and the rotor radial offset can be accurately observed without additional hardware, so that radial-displacement-sensor-free operation of the motor is realized, the cost of the driving system is lowered, and the operating reliability of the driving system is improved; and by adoption of the rotor radial offset observation method, the difficulty in accurate observation of the rotor radial offset of the bearing-less magnetic flux switching motor without a rotor radial offset physical sensor can be solved.
Description
technical field [0001] The invention relates to a method for observing the radial offset of the rotor of a bearingless magnetic flux switching motor. Background technique [0002] The traditional permanent magnet synchronous motor adopts the permanent magnet structure of the rotor, and the permanent magnet is located in the inner cavity of the stator. Since the temperature of the inner cavity of the stator is usually high, and the temperature is not easy to dissipate, the permanent magnet has the risk of temperature rise and demagnetization. For this reason, scholars have proposed a stator permanent magnet flux switching motor. The permanent magnet is on the stator, and the temperature of the permanent magnet is easy to dissipate, which effectively reduces the risk of permanent magnet temperature rise and demagnetization. [0003] The stator permanent magnet flux switching motor supported by mechanical bearings has mechanical wear of the bearings, which limits the applicati...
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IPC IPC(8): H02P6/182H02P6/18
CPCH02P6/182H02P6/188H02P2203/09
Inventor 周扬忠方飞郑梦飞钟天云
Owner FUZHOU UNIV