摘要:
The conventional slit is symmetrically aligned with respect to the q-axis that is a direction where the magnetic flux is difficult to flow. Because of this, the generated magnetic flux must jump over the slit, whereas its jumping over position being dependent on the rotation of the rotor. This hinders a flow of the magnetic flux. This has caused problems such as making the efficiency worse and increasing the losses. Therefore, at least one pair of slits is constructed on the rotor, which forms the salient pole so as to obtain the d-axis (where the magnetic flux is easy to flow) and the q-axis (where the magnetic flux is difficult to flow). A low magnetic resistance parts having a small magnetic resistance are formed at these slits that are asymmetrically aligned with respect to the q-axis.
摘要:
A space tension chord arch member dome reinforced with tension members and method of construction. Maximum building space is ensured by using tension chord members, which reduces the material costs and simplifies assembly of the dome. The system permits use of laminated wood for the arch members of the dome superstructure.
摘要:
An object is to provide a permanent magnet motor that highly reduces torque fluctuation, thereby reducing noise and vibration. The permanent magnet motor may be formed as follows: a length D of a permanent magnet 8 in a longitudinal direction is the same as or longer than a width A between sides of the magnetic pole tooth 3 in the circumferential direction in an end portion of the magnetic pole tooth 3, and a distance C between tip portions of a pair of the first slits 13a and 13b within the same pole is smaller than the width A between the sides of the magnetic pole tooth 3 in the circumferential direction in the end portion of the magnetic pole tooth 3. The permanent magnet motor, thus formed, may be characterized in that cut surfaces 12 face the first slits 13a and 13b.
摘要:
It is an objective to provide a permanent magnet synchronous motor that is highly efficient with low vibration and low noise. A stator 30 includes a stator core 1 that includes magnetic pole teeth 2 each formed between adjacent slots 3, and stator windings 4 that are provided in the slots 3 of the stator core 1. A rotor 40 includes a rotor core 5, a plurality of magnet retaining holes 8, permanent magnets 7 inserted in the magnet retaining holes 8, and a plurality of slits 6 in the rotor core 5 on an outer circumferential side of the magnet retaining holes 8. Among the slits 6, slits 6 in a vicinity of a magnetic pole center of the rotor core 5 are oriented in a direction where a magnetic flux generated by a permanent magnet 7 converges outside the rotor core 5, whereas slits 6 in a vicinity of a pole border portion of the rotor core 5 are oriented in another direction that is different from the direction of the plurality of slits 6 in the vicinity of the magnetic pole center of the rotor core 5.
摘要:
It is an object to obtain a highly efficient and low-cost single-phase motor and a hermetic compressor employing the motor by producing the motor in a form that allows a proper material layout, with securing a magnetic path of a coreback of a stator iron core. According to the present invention, in a single-phase motor having a stator including a stator iron core formed by laminating a plurality of electromagnetic steel sheets and provided with a slot and single-phase two-pole distributed windings composed of a main winding and an auxiliary winding contained in the slot, and a rotor placed through a gap on an inner circumference of the stator, at least five notches each having a roughly straight lined shape are provided on an outer circumference of the stator iron core, so that a quadrangle is formed by straight lines including four notches out of the at least five notches.
摘要:
It is an objective to provide a permanent magnet synchronous motor that is highly efficient with low vibration and low noise. A stator 30 includes a stator core 1 that includes magnetic pole teeth 2 each formed between adjacent slots 3, and stator windings 4 that are provided in the slots 3 of the stator core 1. A rotor 40 includes a rotor core 5, a plurality of magnet retaining holes 8, permanent magnets 7 inserted in the magnet retaining holes 8, and a plurality of slits 6 in the rotor core 5 on an outer circumferential side of the magnet retaining holes 8. Among the slits 6, slits 6 in a vicinity of a magnetic pole center of the rotor core 5 are oriented in a direction where a magnetic flux generated by a permanent magnet 7 converges outside the rotor core 5, whereas slits 6 in a vicinity of a pole border portion of the rotor core 5 are oriented in another direction that is different from the direction of the plurality of slits 6 in the vicinity of the magnetic pole center of the rotor core 5.
摘要:
It is an object to obtain a highly efficient and low-cost single-phase motor by producing the motor in a form that allows a proper material layout, with securing a magnetic path of a coreback of a stator iron core. A stator iron core 1 formed by laminating a plurality of electromagnetic steel sheets and provided with N slots, where N/2 is odd, a part of which are large slots 4 and others are small slots 3 having a shallower depth in a radial direction; a main winding 6 of 2-pole single-phase concentric winding arrangement inserted to the large slots 4 or the small slots 3; and an auxiliary winding 7 of 2-pole single-phase concentric winding arrangement inserted to the large slots 4 or the small slots 3 and arranged at a location which is dislocated by other than 90 degrees in electrical angle from the main winding 6 are included, and among the N slots, slots of which the occupying rate of winding is made smaller than others by arranging the auxiliary winding 7 at a location which is dislocated by other than 90 degrees in electrical angle from the main winding 6 are made the small slots 3, and other slots are made the large slots 4.
摘要:
There are problems in a rotor having a slit that it is difficult to increase the number of rotations of the rotor, since the centrifugal force is received at both ends of the slit, and if the connection part is made thick to increase the number of rotations, the properties of the motor is deteriorated. According to the present invention, a rotor for a synchronous motor includes a slot for generating induction torque and a slit for generating reluctance torque, the slit is filled with a filler, the slit is provided with at least one of a convex and a concave, so that the convex and the concave are formed so as to receive the centrifugal force which is generated by the rotation of the rotor and acts on a part of the rotor outside the slit and the filler so as to bulge toward the outside from the center side of the rotor by mechanical bondage of the filler and the rotor core.
摘要:
An object is to provide a permanent magnet motor that highly reduces torque fluctuation, thereby reducing noise and vibration. The permanent magnet motor may be formed as follows: a length D of a permanent magnet 8 in a longitudinal direction is the same as or longer than a width A between sides of the magnetic pole tooth 3 in the circumferential direction in an end portion of the magnetic pole tooth 3, and a distance C between tip portions of a pair of the first slits 13a and 13b within the same pole is smaller than the width A between the sides of the magnetic pole tooth 3 in the circumferential direction in the end portion of the magnetic pole tooth 3. The permanent magnet motor, thus formed, may be characterized in that cut surfaces 12 face the first slits 13a and 13b.
摘要:
It is an object to obtain a highly efficient and low-cost single-phase motor and a hermetic compressor employing the motor by producing the motor in a form that allows a proper material layout, with securing a magnetic path of a coreback of a stator iron core. According to the present invention, in a single-phase motor having a stator including a stator iron core formed by laminating a plurality of electromagnetic steel sheets and provided with a slot and single-phase two-pole distributed windings composed of a main winding and an auxiliary winding contained in the slot, and a rotor placed through a gap on an inner circumference of the stator, at least five notches each having a roughly straight lined shape are provided on an outer circumference of the stator iron core, so that a quadrangle is formed by straight lines including four notches out of the at least five notches.