Rotor assembly and self-starting permanent magnet synchronous reluctance motor
A technology of rotors and components, which is applied in the direction of synchronous machine parts, electric components, magnetic circuit rotating parts, etc. It can solve the problems of reducing the output torque and efficiency of the motor, the magnetic saturation of the magnetic conduction channel, and the decrease in the efficiency of the motor system. , to achieve the effect of improving output torque and efficiency and avoiding magnetic saturation
Active Publication Date: 2022-05-17
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0003] Traditional permanent magnet motors and permanent magnet synchronous reluctance motors require a driver to start and control the operation, which is costly and complicated to control, and the driver occupies a part of the loss, which reduces the efficiency of the entire motor system
[0004] The Chinese invention patent with the patent publication number CN107994698A provides a self-starting permanent magnet synchronous reluctance motor to reduce the cost of the permanent magnet. However, the structure between the permanent magnet and the magnetic conduction channel in this patent is unreasonable, which makes the magnetic conduction channel easy. Magnetic saturation occurs, reducing the output torque and efficiency of the motor
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[0035] see in conjunction Figure 1 to Figure 7 As shown, according to the embodiment of the present application, the rotor assembly includes a rotor core 1. On the cross section of the rotor core 1, the rotor core 1 is provided with a slot 2 and a permanent magnet 3, and the permanent magnet 3 is provided in a narrow In the slot 2, at least two layers are arranged along the d-axis direction. Along the radially outward direction of the d-axis, the length of the permanent magnet 3 along the q-axis direction increases, and the pole arc angle of the permanent magnet 3 decreases. The pole arc angle is The angle formed by the line between the two ends of the permanent magnet 3 and the central axis of the rotor core 1 .
[0036] The rotor assembly can reasonably limit the structure of the permanent magnet 3 by limiting the length change of the permanent magnet 3 along the d-axis direction and the change of the pole arc angle, so as to ensure the maximum utilization of the inner perm...
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The present application provides a rotor assembly and a self-starting permanent magnet synchronous reluctance motor. The rotor assembly includes a rotor core (1), on the cross section of the rotor core (1), the rotor core (1) is provided with a slit slot (2) and a permanent magnet (3), the permanent magnet (3) It is arranged in the slit groove (2), and at least two layers are arranged along the direction of the d-axis. Along the radially outward direction of the d-axis, the length of the permanent magnet (3) along the direction of the q-axis increases, and the length of the permanent magnet (3) The pole arc angle decreases gradually, and the pole arc angle is the angle formed by the connection line between the two end edges of the permanent magnet (3) and the central axis of the rotor iron core (1). According to the rotor assembly of the present application, the maximum utilization of the permanent magnets in the inner layer can be ensured, while magnetic saturation can be avoided, and the output torque and efficiency of the motor can be improved.
Description
technical field [0001] The present application relates to the technical field of motors, in particular to a rotor assembly and a self-starting permanent magnet synchronous reluctance motor. Background technique [0002] The self-starting permanent magnet synchronous reluctance motor combines the structural characteristics of the induction motor and the synchronous permanent magnet reluctance motor. The starting torque is generated by the squirrel cage induction, and the constant torque is realized by the difference between the d and q axis magnetic flux of the rotor and the torque generated by the permanent magnet. It can run at high speed and can be directly connected to the power supply to realize the starting operation. The self-starting permanent magnet synchronous reluctance motor can use the reluctance torque to increase the output torque of the motor. Compared with the self-starting permanent magnet motor, the amount of permanent magnets is reduced and the cost is red...
Claims
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IPC IPC(8): H02K1/27H02K1/272H02K21/02
CPCH02K1/27H02K1/272H02K21/02H02K2213/03
Inventor 陈彬肖勇胡余生史进飞李霞张志东
Owner GREE ELECTRIC APPLIANCES INC