The synchronous magnetic resistance motor rotor structure
Technical field
The utility model relates to the alternating current machine technical field, particularly a kind of synchronous magnetic resistance motor rotor structure with special shape.
Background technology
Early stage synchronous magnetic resistance motor is again armature reaction-excited machine, belongs to a machine of synchronous machine.Its feature is there is no excitation winding on rotor, and stator winding is connected AC power and produced magnetic field, because friendship, d-axis reactance there are differences and produce electromagnetic torque, thereby realize energy converting between mechanical.
As shown in Figure 1, the rotor punching structure intensity of this shape is lower, in processing and use procedure, easily causes rotor punching grid place to rupture and affects the result of motor performance.
The utility model content
Technical problem to be solved in the utility model is that a kind of synchronous magnetic resistance motor rotor structure that improves rotor structure intensity will be provided.
In order to solve above technical problem, the utility model provides a kind of synchronous magnetic resistance motor rotor structure, this rotor axially laminates fastening forming by a plurality of discoid rotor punchings along rotating shaft, the rotor punching punching has some magnetic resistance grooves, formed by grid around the magnetic resistance groove, magnetic resistance groove centre position at rotor is provided with magnetic bridge, and the width of magnetic bridge is less than or equal to the width of grid.
Hand over the ratio of axle inductance and d-axis inductance to be called the salient pole ratio in synchronous magnetic resistance motor.And the size of synchronous magnetic resistance motor electromagnetic torque directly is proportional to the salient pole ratio.Therefore salient pole is than being the direct main electromagnetic performance that affects motor.For guaranteeing the salient pole ratio of rotor, the magnetic resistance groove of outmost turns is not provided with magnetic bridge, and the width a of magnetic bridge must be less than or equal to the width b of grid.
Superior effect of the present utility model is: improved rotor structure intensity.
Description of drawings
Fig. 1 is former synchronous magnetic resistance motor rotor structural representation;
Fig. 2 is the radial section schematic diagram of synchronous magnetic resistance motor rotor structure of the present utility model;
The number in the figure explanation:
The 1-rotor core; The 2-key;
The 3-rotating shaft; 4-magnetic resistance groove;
The 5-grid; The 6-magnetic bridge.
Embodiment
See also shown in accompanying drawing, the utility model will be further described.
As shown in Figure 2, the utility model provides a kind of synchronous magnetic resistance motor rotor structure, this rotor axially laminates fastening forming by a plurality of discoid rotor punchings along rotating shaft, the rotor punching punching has some magnetic resistance grooves 4, formed by grid 5 around magnetic resistance groove 4, magnetic resistance groove 4 centre positions at rotor are provided with magnetic bridge 6, and the width of magnetic bridge 6 is less than or equal to the width of grid 5.
Hand over the ratio of axle inductance and d-axis inductance to be called the salient pole ratio in synchronous magnetic resistance motor.And the size of synchronous magnetic resistance motor electromagnetic torque directly is proportional to the salient pole ratio.Therefore salient pole is than being the direct main electromagnetic performance that affects motor.For guaranteeing the salient pole ratio of rotor, the magnetic resistance groove 4 of outmost turns is not provided with magnetic bridge, and the width a of magnetic bridge 6 must be less than or equal to the width b of grid 5.