CN110649722A - Motor with stator core made of integrated amorphous alloy and silicon steel - Google Patents

Abstract

A motor integrating amorphous alloy and silicon steel as stator iron core, comprising a motor housing, a stator and a rotor are arranged in the motor housing, the stator comprises a first stator, a second stator, a first stator, a first stator and a second stator. The two stators are arranged independently of each other, the first stator is made of amorphous alloy, the amorphous stator winding is connected to the first stator, the second stator is made of silicon steel, and the silicon steel stator winding is connected to the second stator; The outer side of the stator and the second stator are fixedly connected to the inner side of the motor housing, the central position bearing of the motor housing is connected with a rotating shaft, and the outer side of the rotating shaft is sleeved with a rotor, the rotor includes a first rotor, a second rotor, the first rotor, The positions of the second rotor correspond to the positions of the first stator and the second stator respectively, and air gaps are provided between the first rotor and the first stator and between the second rotor and the second stator.

Description

A motor integrating amorphous alloy and silicon steel as stator core

technical field

The invention relates to the field of new energy vehicles, in particular to a motor integrating amorphous alloy and silicon steel as stator iron cores.

Background technique

my country has independently developed drive motors that meet the needs of various new energy vehicles, and some of its performance indicators have reached the international advanced level of the same power level, but there is still a certain gap with foreign technologies in terms of peak speed, power density and efficiency. It is still important and necessary to develop and optimize new electric motors and their drive systems that are more efficient, reliable and cost-effective. The working efficiency of the pure amorphous iron core motor is much higher than that of the silicon steel core motor. The magnetic permeability of the iron-based amorphous alloy material is about 6 times that of the silicon steel at the power frequency, so the amorphous iron core motor is designed. The excitation current can be lower than the silicon steel core motor, which can reduce the copper consumption of the motor to a certain extent. In the application frequency range of the motor, the magnetic permeability of the iron-based amorphous alloy hardly changes with the increase of the frequency, while the magnetic permeability of the silicon steel decreases with the increase of the frequency, so the amorphous iron core motor is in high The frequency advantage will be more obvious. Amorphous motors are more energy efficient and efficient than silicon steel motors, and it is easier to achieve high motor speed, high power density or high torque density by increasing the frequency on the premise of ensuring high motor efficiency. However, the pure amorphous iron core motor has a magnetostrictive effect. When the magnetic induction intensity is relatively high and the frequency is high, it will cause relatively large noise during operation. This is unacceptable in new energy vehicles. Traditional The working efficiency and power of the motor with pure silicon steel as the iron core appear to be low when it is used as the driving motor in the new energy vehicle, neither of which can best meet the needs of the new energy vehicle.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems, and to provide a motor with a simple structure and convenient use, which integrates amorphous alloy and silicon steel as stator iron cores.

In order to achieve the above object, the technical scheme of the present invention is:

A motor integrating amorphous alloy and silicon steel as stator iron core, comprising a motor housing, a stator and a rotor are arranged in the motor housing, the stator comprises a first stator, a second stator, a first stator, a first stator and a second stator. The two stators are arranged independently of each other, the first stator is made of amorphous alloy, the amorphous stator winding is connected to the first stator, the second stator is made of silicon steel, and the silicon steel stator winding is connected to the second stator; The outer side of the stator and the second stator are fixedly connected to the inner side of the motor housing, the central position bearing of the motor housing is connected with a rotating shaft, and the outer side of the rotating shaft is sleeved with a rotor, the rotor includes a first rotor, a second rotor, the first rotor, The positions of the second rotor correspond to the positions of the first stator and the second stator, respectively, and air gaps are provided between the first rotor and the first stator and between the second rotor and the second stator.

Further, the first stator is an iron-based amorphous alloy stator, and the second stator is a silicon steel stator.

Further, the iron-based amorphous alloy stator is made of heat-treated iron-based amorphous alloy laminations.

Further, the first rotor and the second rotor are both cast copper rotors.

Further, a tachometer gear, a speed sensor, and a temperature sensor are arranged in the motor housing, and the tachometer gear, the speed sensor, and the temperature sensor are all connected with a controller circuit that controls the start of the motor.

Compared with the prior art, the present invention has the following advantages and positive effects:

The present invention combines the advantages of an amorphous iron core motor and a silicon iron core motor by arranging the first stator made of amorphous alloy and the second stator made of silicon steel respectively in the motor housing. When the new energy vehicle is in a low-speed driving condition, the vehicle requires the drive motor to have low output torque, low speed and low power. At this time, the advantages of the amorphous stator at low frequencies cannot be reflected, and the output power of the amorphous stator part is limited. , so only the power-on control of the second stator can satisfy the driving requirement. Since the amorphous stator has the characteristics of high frequency and low loss that the silicon steel stator does not have, when the new energy vehicle is in a high-speed driving condition, the vehicle requires the drive motor to have a small output torque, high speed and low power. Therefore, only the first stator is tested. Power-on control, in the state of high frequency and low power, the magnetic induction intensity inside the amorphous stator is weak, the magnetostrictive effect is small, and the noise is low. When under heavy load conditions such as starting, climbing a long slope, and overtaking at high speed, the vehicle requires the motor to maintain high torque and high power output. At this time, the first stator and the second stator start output at the same time, so that the entire motor can output the maximum torque and maximum power. . Through the combined application of stators made of two materials, the overall efficiency of the drive system is improved and the peak power density is increased. Amorphous material has a much larger magnetic permeability than silicon steel, so it can greatly reduce the excitation current of the motor, thereby reducing the copper loss of the motor and less copper used in the winding, which further improves the motor efficiency and reduces the the overall cost of the motor. At the same time, the amorphous alloy stator has a lower density than silicon steel, so the stator weight of the motor is also reduced. Overall, this hybrid motor reduces the unloaded weight of new energy vehicles, reduces motor costs, increases the cruising range of new energy vehicles, and optimizes the full range of work efficiency of new energy vehicles.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the present invention. Inside.

As shown in FIG. 1 , a motor integrating amorphous alloy and silicon steel as a stator core includes a motor housing 1, and a stator and a rotor are arranged in the motor housing 1. The stator includes a first stator 2, a rotor, and a rotor. The second stator 3, the first stator 2 and the second stator 3 are arranged independently of each other, the first stator 2 is an iron-based amorphous alloy stator, and the iron-based amorphous alloy stator is made of heat-treated iron-based amorphous alloy laminations The first stator 2 is connected with an amorphous stator winding 10; the second stator 3 is a silicon steel stator, and the second stator 3 is connected with a silicon steel stator winding 4. The inner side of the casing 1 is fixedly connected, the central position of the motor casing 1 is connected with a rotating shaft 8 through a bearing 7, and the outer side of the rotating shaft 8 is sleeved with a rotor, the rotor includes a first rotor 5, a second rotor 6, the first rotor 5, The second rotors 6 are all cast copper rotors. The first rotor 5 and the second rotor 6 correspond to the positions of the first stator 2 and the second stator 3 respectively. An air gap 9 is provided between the two rotors 6 and the second stator 3 .

The hybrid stator material drive motor consists of two kinds of stators, so the motor has 6 wires, which are the three-phase outgoing wires of the silicon steel stator and the three-phase outgoing wires of the amorphous stator. The outgoing wire is connected with the amorphous stator drive circuit. Motor control is realized by outputting 3 different PWM combinations to drive 6 IGBT power tubes according to the vector control algorithm.

Both the amorphous stator winding and the silicon steel stator winding are independent windings, which are respectively connected to the amorphous stator and the silicon steel stator. The two stators and their windings are not mechanically coupled, and torque is coupled through a rotating shaft. The three-phase outlet is the amorphous stator winding and the silicon steel winding outlet. Since these two windings belong to the amorphous stator and the silicon steel stator, respectively, the number of turns and the number of parallel wires of the windings are also different. The material consumption of amorphous stator and silicon steel stator is also different, and the optimal ratio is calculated mainly according to the characteristics of vehicle motor working conditions. The end of the motor is also equipped with a tachometer gear, a speed sensor, and two temperature sensors, which are necessary signals for high-performance motor vector control. A tachometer gear, a speed sensor, and two temperature sensors are connected to the controller line that controls the motor.

The invention uses iron-based amorphous alloy and silicon steel sheet as the stator core material of the motor, and there are independent windings belonging to the amorphous stator and windings belonging to the silicon steel stator inside the motor. The two windings are not mechanically coupled. Iron-based amorphous alloy laminations require certain heat treatment, which is suitable for the production and performance of amorphous radial flux motors.

The present invention combines the advantages of an amorphous iron core motor and a silicon iron core motor by arranging the first stator made of amorphous alloy and the second stator made of silicon steel respectively in the motor housing. When the new energy vehicle is in a low-speed driving condition, the vehicle requires the drive motor to have low output torque, low speed and low power. At this time, the advantages of the amorphous stator at low frequencies cannot be reflected, and the output power of the amorphous stator part is limited. , so only the power-on control of the second stator can satisfy the driving requirement. Since the amorphous stator has the characteristics of high frequency and low loss that the silicon steel stator does not have, when the new energy vehicle is in a high-speed driving condition, the vehicle requires the drive motor to have a small output torque, high speed and low power. Therefore, only the first stator is tested. Power-on control, in the state of high frequency and low power, the magnetic induction intensity inside the amorphous stator is weak, the magnetostrictive effect is small, and the noise is low. Under heavy load conditions such as starting, climbing long slopes, and high-speed overtaking, the vehicle requires the motor to maintain high torque and high power output. At this time, the first stator and the second stator start output at the same time, so that the entire motor can output maximum torque and maximum power. . Through the combined application of stators made of two materials, the overall efficiency of the drive system is improved and the peak power density is increased. Amorphous material has a much larger magnetic permeability than silicon steel, so it can greatly reduce the excitation current of the motor, thereby reducing the copper loss of the motor and less copper used in the winding, which further improves the motor efficiency and reduces the the overall cost of the motor. At the same time, the amorphous alloy stator has a lower density than silicon steel, so the stator weight of the motor is also reduced. Overall, this hybrid motor reduces the unloaded weight of new energy vehicles, reduces motor costs, increases the cruising range of new energy vehicles, and optimizes the full range of work efficiency of new energy vehicles.

Amorphous alloy motors have superior performance and have good market application prospects. Compared with traditional silicon steel sheet motors, amorphous alloy motors have excellent electromagnetic properties, especially in high-speed and high-frequency applications. But there are almost no amorphous alloy drive motors that can really be used in new energy vehicles. Therefore, the present invention makes the amorphous alloy truly applied to the new energy drive motor by combining silicon steel material and amorphous alloy as the motor of the stator core. Through the application of this combined material, combined with the design of a special control system, the It greatly improves the overall efficiency of the drive system and makes great contributions to the sustainable development of new energy vehicles.

Claims (5)

1. The utility model provides an integrated metallic glass and silicon steel are stator core's motor, includes motor casing, is provided with stator, rotor in the motor casing, its characterized in that: the stator comprises a first stator and a second stator which are arranged independently, the first stator is made of amorphous alloy, an amorphous stator winding is connected to the first stator, the second stator is made of silicon steel, and a silicon steel stator winding is connected to the second stator; the outer sides of the first stator and the second stator are fixedly connected with the inner side of the motor shell, a rotating shaft is connected to the center of the motor shell through a bearing, a rotor is sleeved on the outer side of the rotating shaft and comprises a first rotor and a second rotor, the first rotor and the second rotor correspond to the first stator and the second stator in position respectively, and air gaps are formed between the first rotor and the first stator and between the second rotor and the second stator.

2. The motor of claim 1 in which the stator core is formed of an integrated amorphous alloy and silicon steel, wherein: the first stator is an iron-based amorphous alloy stator, and the second stator is a silicon steel stator.

3. The motor of claim 2 in which the stator core is formed of an integrated amorphous alloy and silicon steel, wherein: the iron-based amorphous alloy stator is made of an iron-based amorphous alloy lamination subjected to heat treatment.

4. The motor of claim 1 in which the stator core is formed of an integrated amorphous alloy and silicon steel, wherein: the first rotor and the second rotor are both cast copper rotors.

5. The motor of claim 1 in which the stator core is formed of an integrated amorphous alloy and silicon steel, wherein: the motor shell is internally provided with a speed measuring gear, a speed sensor and a temperature sensor which are all connected with a controller circuit for controlling the motor to run.

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