Direct-current brushless motor with double independent windings

Abstract

The invention discloses a double-independent-winding direct-current brushless motor which comprises a stator iron core for winding enameled wire windings, the stator iron core is divided into two groups according to the number of winding grooves of the stator iron core and the number of poles, all odd winding grooves in the number of the grooves form a first group of motor winding grooves, and all even winding grooves in the number of the grooves form a second group of motor winding grooves. And two groups of dual-motor winding slot structures which do not interfere with each other are formed. The phenomenon that enameled wires of different motor windings are overlapped does not exist, normal work of the second winding is not affected even if one winding is damaged, natural switching is achieved in control, and the service life is doubled in the true sense.

Description

Technical Field

[0001] The invention relates to a brushless DC motor, in particular to a double-winding brushless DC motor on a double-winding motor. Background Art

[0002] Usually, brushless DC motors are needed in products such as industrial automatic door motors to drive the opening and closing of automatic doors. However, in existing applications of brushless DC motors such as industrial automatic doors, there is usually only one motor driving and controlling the automatic door. If the brushless DC motor is damaged, it is necessary to wait for a new brushless DC motor to be replaced before the industrial automatic door can be controlled again, which brings a certain degree of loss or inconvenience in manual control after a fault occurs. Some may also use spare motors, but there is a defect that the spare motor is high in cost.

[0003] The patent number ZL201711135062.3 published on March 27, 2018 discloses a dual-winding DC brushless motor, including a stator core for winding enameled wire windings, a double-layer winding is arranged in the winding slot of the stator core, and a stator core has two sets of winding structures, each set of windings represents a winding motor, and the two sets of windings represent two independent winding motors; a Hall device is arranged at each winding slot position of the stator core, each set of windings corresponds to 1 / 2 of the number of Hall devices, and the Hall device is arranged at each slot position of the stator core through a Hall connecting column. The problem of industrial automatic doors not being able to work properly due to motor failure can be solved as quickly as possible. Two DC brushless motors can be wound in the winding of a DC brushless motor. Even if one is damaged, the other can be started, thereby increasing the service life of the DC brushless motor and reducing the standby cost. However, there are overlapping factors in the enameled wire of this solution, and the motor is generally damaged by factors such as high temperature overload, which leads to damage to the enameled wire. Therefore, this may cause a safety hazard of failure of both sets of windings at the same time, thereby causing the possibility of failure to achieve the established functional requirements of the dual winding. Summary of the invention

[0004] The present invention is to solve the problems that when a DC brushless motor fails in an existing industrial automatic door, it is easy to cause inconvenience in the switch management of the industrial automatic door, or a higher spare DC brushless motor cost needs to be invested to avoid the inconvenience in the switch management of the automatic door caused by the DC brushless motor failure, or the use of a dual-winding motor has a safety hazard of two sets of windings failing at the same time, thereby causing the possibility that the established functional requirements of the dual winding cannot be achieved. A dual-winding motor is provided, in which there is no overlapping factor of enameled wires of different motor windings, and even if one set of windings is damaged, it will not affect the normal operation of the second set of windings, and natural switching is achieved in control, thereby truly doubling the life of the dual independent winding DC brushless motor.

[0005] The specific technical solution adopted by the present invention to solve the above technical problems is: a dual independent winding DC brushless motor, including a stator core for winding enameled wire windings, characterized in that: the stator core winding slots are divided into two groups according to the number of slots and the number of poles, all odd-numbered winding slots in the number of slots constitute the first group of motor winding slots, and all even-numbered winding slots in the number of slots constitute the second group of motor winding slots, forming two groups of non-interfering dual motor winding slot structures. The two groups of non-interfering dual motor winding slot structures do not have the phenomenon of overlapping factors of two different motor winding enameled wires. Even if one set of motor windings is damaged, it will not affect the normal operation of the second set of motor windings. Natural switching is achieved in control, and the life span is doubled in a real sense.

[0006] Preferably, for the 12-slot 8-pole stator core winding slot structure, a dual motor winding slot structure divided into 6-slot 8-pole and 6-slot 8-pole is adopted, wherein the 1st winding slot, the 3rd winding slot, the 5th winding slot, the 7th winding slot, the 9th winding slot and the 11th winding slot together constitute the first group of motor winding slots, and the 2nd winding slot, the 4th winding slot, the 6th winding slot, the 8th winding slot, the 10th winding slot and the 12th winding slot together constitute the second group of motor winding slots, forming two independent motor winding slots that do not interfere with each other. The rationality of the enameled wire winding distribution structure is improved, the phenomenon of overlapping factors of enameled wires of different motor windings is avoided, the failure rate is reduced, the service life of the brushless DC motor is truly improved, the standby cost is reduced, and two independent motors that do not interfere with each other are truly formed.

[0007] Preferably, in the first group of motor winding slots, the first winding slot is used as the U1 phase slot of the first motor, the fifth winding slot is used as the V1 phase slot of the first motor, and the third winding slot is used as the W1 phase slot of the first motor; in the second group of motor winding slots, the second winding slot is used as the U2 phase slot of the second motor, the sixth winding slot is used as the V2 phase slot of the second motor, and the fourth winding slot is used as the W2 phase slot of the second motor. The rationality of the enameled wire winding distribution structure is improved, the phenomenon of overlapping factors of enameled wires of different motor windings is avoided, the failure rate is reduced, the service life of the brushless DC motor is truly improved, the standby cost is reduced, and two independent motors that do not interfere with each other are truly formed.

[0008] Preferably, for the 12-slot 8-pole stator core winding structure, each group of motor windings includes three-phase wires constituting the motor windings, and the 12 winding slots on the stator core are numbered counterclockwise, wherein the three-phase wires of the first group of motor windings are Fa phase / Fb phase / Fc phase; the Fa phase is wound in the 1st winding slot and then wound sequentially to the 7th winding slot, the Fc phase is wound in the 3rd winding slot and then wound sequentially to the 9th winding slot, and the Fb phase is wound in the 5th winding slot and then wound sequentially to the 11th winding slot, and after the above winding, the phase wire ends after being wound through the 7th winding slot, the 9th winding slot and the 11th winding slot are connected together; the three-phase wires of the second group of motor windings are Fa1 phase / Fb1 phase Phase / Fc1 phase, Fa1 phase is wound in the second winding slot and then wound in sequence to the eighth winding slot, Fc1 phase is wound in the fourth winding slot and then wound in sequence to the tenth winding slot, Fb1 phase is wound in the sixth winding slot and then wound in sequence to the twelfth winding slot, and after the above winding, the phase wire ends wound through the eighth winding slot, the tenth winding slot and the twelfth winding slot are connected together. Improve the rationality of the enameled wire winding distribution structure, avoid the phenomenon of overlapping factors of enameled wires of different motor windings, reduce the failure rate, truly improve the service life of the brushless DC motor, reduce the standby cost, and truly form two independent motors that do not interfere with each other.

[0009] Preferably, the relationship between the number of slots and the number of poles of the stator core is: 360÷number of stator slots×P=30×K; wherein K is a natural number, and P is the number of pole pairs of the motor. This improves the structural diversity and flexibility of the motor for industrial automatic doors.

[0010] The beneficial effects of the present invention are as follows: there is no overlapping of the enameled wires of two different motor windings in the two sets of non-interfering dual-motor winding slot structures, and even if one set of motor windings is damaged, it will not affect the normal operation of the second set of motor windings. Natural switching is achieved in control, and the lifespan is truly doubled. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0012] Figure 1 The present invention is a schematic cross-sectional view of the double winding structure of the stator core part of the double independent winding DC brushless motor.

[0013] Figure 2 It is a winding expansion diagram of the double independent winding DC brushless motor of the present invention. DETAILED DESCRIPTION

[0014] Figure 1 , Figure 2In the embodiment shown, a dual independent winding DC brushless motor includes a stator core for winding enameled wire windings, which is divided into two groups according to the number of slots and the number of poles of the stator core winding slots, all odd winding slots in the slot number constitute a first group of motor winding slots, and all even winding slots in the slot number constitute a second group of motor winding slots, forming two groups of dual motor winding slot structures that do not interfere with each other. For a 12-slot 8-pole stator core winding slot structure, a dual motor winding slot structure divided into 6 slots 8 poles and 6 slots 8 poles is adopted, wherein the 1st winding slot, the 3rd winding slot, the 5th winding slot, the 7th winding slot, the 9th winding slot and the 11th winding slot together constitute the first group of motor winding slots, and the 2nd winding slot, the 4th winding slot, the 6th winding slot, the 8th winding slot, the 10th winding slot and the 12th winding slot together constitute the second group of motor winding slots, forming two independent motor winding slots that do not interfere with each other. The two sets of motor windings are independently separated and located in the same stator core winding slot structure. Even if one set of motors is damaged, it will not affect the second set of motors. Natural switching is achieved in control, truly realizing the design effect of doubling the life of the dual-winding DC brushless motor.

[0015] In the first group of motor winding slots, the first winding slot is used as the U1 phase slot of the first motor, the fifth winding slot is used as the V1 phase slot of the first motor, and the third winding slot is used as the W1 phase slot of the first motor; in the second group of motor winding slots, the second winding slot is used as the U2 phase slot of the second motor, the sixth winding slot is used as the V2 phase slot of the second motor, and the fourth winding slot is used as the W2 phase slot of the second motor.

[0016] For the 12-slot 8-pole stator core winding structure, each group of motor windings includes three-phase wires constituting the motor windings, and the 12 winding slots on the stator core are numbered counterclockwise, wherein the three-phase wires of the first group of motor windings are Fa phase / Fb phase / Fc phase respectively; the Fa phase is wound in the 1st winding slot and then wound sequentially to the 7th winding slot, the Fc phase is wound in the 3rd winding slot and then wound sequentially to the 9th winding slot, and the Fb phase is wound in the 5th winding slot and then wound sequentially to the 11th winding slot. After the above winding, the phase wire ends after winding through the 7th winding slot, the 9th winding slot and the 11th winding slot are connected together; the three-phase wires of the second group of motor windings are Fa1 phase / Fb1 phase Phase / Fc1 phase, Fa1 phase is wound in the second winding slot and then wound in sequence to the eighth winding slot, Fc1 phase is wound in the fourth winding slot and then wound in sequence to the tenth winding slot, Fb1 phase is wound in the sixth winding slot and then wound in sequence to the twelfth winding slot, and after the above winding, the phase wire ends wound through the eighth winding slot, the tenth winding slot and the twelfth winding slot are connected together. The relationship between the number of slots and the number of poles of the stator core is: 360÷number of stator slots×P=30×K; where K is a natural number and P is the number of pole pairs of the motor.

[0017] The above content and structure describe the basic principle, main features and advantages of the product of the present invention, which should be understood by those skilled in the art. The above examples and descriptions are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dual independent winding DC brushless motor, comprising a stator core for winding enameled wire windings, characterized in that: The stator core winding slots are divided into two groups according to the number of slots and poles. All odd-numbered winding slots in the slot number constitute the first group of motor winding slots, and all even-numbered winding slots in the slot number constitute the second group of motor winding slots, forming two groups of dual motor winding slot structures that do not interfere with each other.

2. The dual independent winding DC brushless motor according to claim 1, characterized in that: For the 12-slot 8-pole stator core winding slot structure, a dual motor winding slot structure divided into 6-slot 8-pole and 6-slot 8-pole is adopted, wherein the 1st winding slot, the 3rd winding slot, the 5th winding slot, the 7th winding slot, the 9th winding slot and the 11th winding slot together constitute the first group of motor winding slots, and the 2nd winding slot, the 4th winding slot, the 6th winding slot, the 8th winding slot, the 10th winding slot and the 12th winding slot together constitute the second group of motor winding slots, forming two independent motor winding slots that do not interfere with each other.

3. The dual independent winding DC brushless motor according to claim 2, characterized in that: In the first group of motor winding slots, the first winding slot is used as the U1 phase slot of the first motor, the fifth winding slot is used as the V1 phase slot of the first motor, and the third winding slot is used as the W1 phase slot of the first motor; In the second group of motor winding slots, the 2nd winding slot is used as the U2 phase slot of the second motor, the 6th winding slot is used as the V2 phase slot of the second motor, and the 4th winding slot is used as the W2 phase slot of the second motor.

4. The dual independent winding DC brushless motor according to claim 1, characterized in that: For the 12-slot 8-pole stator core winding structure, each group of motor windings includes three-phase wires constituting the motor windings, and the 12 winding slots on the stator core are numbered counterclockwise, wherein the three-phase wires of the first group of motor windings are Fa phase / Fb phase / Fc phase respectively; the Fa phase is wound in the 1st winding slot and then wound sequentially to the 7th winding slot, the Fc phase is wound in the 3rd winding slot and then wound sequentially to the 9th winding slot, and the Fb phase is wound in the 5th winding slot and then wound sequentially to the 11th winding slot. After the above winding, the phase wire ends after winding through the 7th winding slot, the 9th winding slot and the 11th winding slot are connected together; the three-phase wires of the second group of motor windings are Fa1 phase / Fb1 phase Phase / Fc1 phase, Fa1 phase is wound in the 2nd winding slot and then sequentially wound into the 8th winding slot, Fc1 phase is wound in the 4th winding slot and then sequentially wound into the 10th winding slot, Fb1 phase is wound in the 6th winding slot and then sequentially wound into the 12th winding slot. After the above winding, the phase wire ends after winding through the 8th winding slot, the 10th winding slot and the 12th winding slot are connected together.

5. The dual independent winding DC brushless motor according to claim 1, characterized in that: The relationship between the number of slots and the number of poles of the stator core is: 360÷number of stator slots×P=30×K; wherein K is a natural number, and P is the number of pole pairs of the motor.

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