Six-phase sine wave doubly salient motor and control system thereof
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A doubly salient motor and control system technology, applied in the control system, motor control, electronic commutation motor control, etc., can solve the problems of back EMF asymmetry, system inoperability, phase asymmetry, etc., and achieve back EMF waveform High sine degree, enhanced fault-tolerant operation capability, and reduced output torque ripple
Active Publication Date: 2020-06-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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There are also Chinese invention patents: a trapezoidal rotor tooth structure sinusoidal double salient pole motor and its design method, application number: 201410852974.2; Chinese invention patent: a segmented rotor tooth structure sinusoidal double salient pole motor and its design method , application number: 201610319506.8, both of which are based on the traditional three-phase double-salient pole motor to design the rotor structure to achieve sinusoidalization, but it increases the difficulty of rotor design and the complexity of the structure, and does not solve the problem of traditional three-phase electric excitation. Due to the three-phase armature winding of the excitation winding and the three-phase armature winding of the doubly salient pole motor, the stator coil of the stator winding of each phase is different from the distribution position of the excitation element, resulting in the inherent asymmetry of each phase, and the back electromotive force caused by the reluctance edge effect. Symmetry issues, which affect the sinusoidality of sinusoidal motors
[0005] The traditional three-phase electric excitation doubly salient pole motor usually adopts 6N / 4N pole structure (N is a positive integer), but the windings of this motor are mostly connected in star form, and no effective isolation is achieved between the phases. When a phase winding appears After a failure, the entire system will not work
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Embodiment 1
[0045] T-shaped rotor pole structure 12 / 10 pole six-phase sine wave electric excitation double salient pole motor, such as figure 1 As shown, it includes the stator core, rotor core, excitation components and armature winding of the same rotating shaft.
[0046] The stator core is as figure 1 As shown, there are stator poles, the stator pole structure is extremely salient, and the number of stator poles is 12. In this example, the stator pole arc coefficient is 0.317.
[0047] The rotor core is as figure 2 As shown, there are rotor poles, the rotor is extremely salient pole structure, the number of rotor poles is 10; the rotor pole arc coefficient is 0.5.
[0048] The rotor has a very T-shaped tooth structure, and the schematic diagram of its structure and eccentric air gap is shown in image 3 As shown, the rotor tooth web thickness w Equal to half the rotor pole arc width, T-flange thickness h is the rotor tooth web thickness w Half of the motor rotor is an oblique po...
Embodiment 2
[0055] Sector rotor pole structure 12 / 10 pole six-phase sine wave double salient pole motor, such as Figure 6 As shown, it includes the stator core, rotor core, excitation components and armature winding of the same rotating shaft.
[0056] The stator core is as Figure 6 As shown, there are stator poles, the stator poles are extremely salient pole structure, the number of stator poles is 12, and the stator pole arc coefficient is equal to 0.317.
[0057] The rotor core is as Figure 7 As shown, there are rotor poles, the rotor is extremely salient pole structure, the number of rotor poles is 10; the rotor pole arc coefficient is 0.5.
[0058] Schematic diagram of fan-shaped rotor pole structure and eccentric air gap image 3 As shown, the rotor has a very fan-shaped tooth structure, and its wide side b 1 Equal to rotor pole arc width, narrow side b 2 Equal to half the width of the rotor pole arc; in this case the maximum air gap δ 2 and minimum air gap δ 1 The l...
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Abstract
The invention discloses a six-phase sine wave doubly salient motor and a control system thereof, a unit motor is of a 12 / 10 pole structure, each excitation element is wound across six stator poles, and the directions of magnetic fields generated by adjacent excitation coils are opposite. The armature coils are wound on the stator poles, the winding direction is consistent with the magnetic field of a magnet exciting coil of a turn chain, and the armature coils with the phase difference of 180 degrees are mutually combined and reversely connected in series to form a six-phase armature winding.A rotor is of a fan-shaped tooth or T-shaped tooth structure and adopts an eccentric air gap pole arc, and the motor rotor is of a skewed pole structure. After the excitation element generates excitation, during rotor rotation process, counter electromotive force of sine waves is induced in the armature winding. A vector control mode can be adopted, the problem that square wave control torque pulsation of a traditional doubly salient motor is large is effectively solved, a six-phase armature winding of the motor can flexibly form a three-phase, double three-phase redundancy and six-phase faulttolerance motor drive control system, and a new choice is provided for a high-reliability and low-torque pulsation drive motor.
Description
technical field [0001] The invention relates to the technical field of special motor body design and control, in particular to a six-phase sine wave double salient pole motor and its control system. Background technique [0002] The doubly salient pole motor is a new type of motor consisting of a power electronic power converter, a controller, a permanent magnet or electromagnetic excitation unit, and a motor body with a salient pole stator and rotor structure. Doubly salient motors are divided into electric excitation doubly salient motors, permanent magnet doubly salient motors and hybrid excitation doubly salient motors, which have good application prospects in wind power, aviation and automobile industries. [0003] As a kind of reluctance motor, doubly salient motor has an inherent defect—the problem of large torque ripple, which has become the biggest obstacle to its application in the field of high-performance drive and servo. The traditional electric excitation doub...
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