WO2011143886A1

WO2011143886A1 - Disk type permanent magnetic synchronizing direct current motor set with multi-combination power

Info

Publication number: WO2011143886A1
Application number: PCT/CN2010/077398
Authority: WO
Inventors: 沈坤元
Original assignee: 苏州博尊科技有限公司
Priority date: 2010-05-19
Filing date: 2010-09-28
Publication date: 2011-11-24
Also published as: CN201717724U

Abstract

A disk type permanent magnetic synchronizing direct current motor set with multi-combination power comprises a housing (3, 5) provided with a main power shaft (7) and at least two groups of motors therein. A rotor (34) of one group of the motors is connected fixedly with the main power shaft, and the others (30, 38) are connected with the main power shaft through clutches (28, 40). In case that the motor set is used in a motor vehicle, all rotors of the motors of the motor set are connected with the main power shaft when the motor vehicle is started so as to quickly start the motor vehicle. One or two groups of motors are automatically shut down when the speed of the motor vehicle reaches a certain speed, thus enabling disengagement of the rotors of the motors from the main power shaft, and hence ensuring that each group of the motors is operated at a maximal efficiency point.

Description

Disc type permanent magnet synchronous multi-combined power DC motor group

The invention relates to a direct current motor, in particular to a dish type permanent magnet synchronous multi-combined power direct current motor unit.

Background technique

At present, the working principle of the traditional column motor has the following shortcomings:

1) The traditional column DC high-power motor is large in volume of 10 kW or more. If it is used in urban buses, it needs 60-120 kW or more. First, its volume cannot be guaranteed on the bus. It needs to be very good in design and structure. The big adjustments have greatly increased the cost of the entire vehicle. If a 60 kW DC motor is used on the bus, if a voltage of 300 volts is used at startup, a high current of 1000 amps is required to start. If the starting current of 300 volts and 1000 amps or more cannot be guaranteed, the speed increase time of the whole vehicle will be prolonged, causing a large current to release the battery for a long time. Due to the capacity limitation of the battery, the mileage of the whole vehicle is shortened. At present, the 5 kW column motor on the market has a speed of 80 km/h and a current of 100 amps. The full-speed running current is 70 amps, and it is not optimal.

2) Long-time high-current discharge will cause damage to the battery, shorten the service life of the battery, and increase the operating cost.

3) The traditional column motor itself is inefficient, so the power must be increased, resulting in an increase in volume and weight, a significant increase in the cost of raw materials, and an increase in the cost of the relative cost.

Summary of the invention

In view of the above deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a disk-type permanent magnet synchronous multi-combined power DC motor unit with small size, multiple combinations, high power, large torque and low energy consumption. In order to solve the above technical problems, the present invention uses the following technical solutions:

A disc-type permanent magnet synchronous multi-combined power DC motor unit includes a casing, a main power shaft is disposed in the casing, and at least two sets of motors are disposed in the casing, wherein a rotor and a set of the motor are The main power shaft is fixedly connected, and the rotors of the remaining sets of motors are connected to the main power shaft through a clutch.

Preferably, the iron core of the stator of the motor is a disk core formed by winding a silicon steel sheet from the inside to the outside, and the winding coil and the detecting rotor are embedded in the side groove of the disk core. a Hall element of the position, the rotor of the motor is cast from stainless steel, and a magnetic conductive steel sheet is embedded in an inner wall surface of the rotor, and a surface of the magnetic conductive steel sheet is uniformly and uniformly pasted with a plurality of magnetic steel permanent magnets The magnetic conductive steel sheet is connected to the main power shaft.

Preferably, the side groove of the disk core has an angle of 0 to 120 degrees.

Preferably, the side groove of the disc core is a V-shaped chute, and the inclination angle is 0-30 degrees.

Preferably, the magnetic steel permanent magnet is a disc V-shaped magnetic steel permanent magnet.

Preferably, the surface of the magnetic conductive steel sheet is circumferentially and uniformly hooked with 20-80 pieces of magnetic steel permanent magnets. Preferably, the material of the magnetic steel permanent magnet is a rare earth neodymium iron boron permanent magnet material.

Preferably, the number of motor pole pairs of the motor is 10-40 pairs.

Preferably, the motor uses a non-uniform air gap.

Preferably, the winding coil is wound on the disk core in units of three wire enameled wires. The above technical solution has the following beneficial effects: When the disc-type permanent magnet synchronous multi-combined power DC motor unit is used on an electric vehicle, when the electric vehicle is started, all the motor rotors in the DC motor group are connected with the main power shaft. Thereby driving the electric vehicle to start quickly, so that the electric vehicle starts to accelerate faster, shortens the discharge time of the large current and speed, and reduces the power consumption. When the electric vehicle reaches a certain speed, it will automatically shut down one to two sets of motors. And disconnect the rotor of these motors from the main power shaft, The power and energy of the motor are more properly played, and each group of motors is guaranteed to work at the highest efficiency point.

The above description is only an overview of the technical solutions of the present invention, and the technical means of the present invention can be more clearly understood and implemented in accordance with the contents of the specification. Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.

DRAWINGS

Fig. 1 is a schematic view showing the appearance of a motor of the present invention.

Figure 2 is a schematic cross-sectional view of the motor of the present invention in Figure 1.

Figure 3 is a schematic exploded view of the left side of the motor of Figure 2 of Figure 2;

4 is a schematic exploded view of the motor of the present invention in FIG.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in Figures 1, 2, 3, and 4, the disc-type permanent magnet synchronous multi-combined power DC motor unit 1 1 includes a casing, and the casing is composed of a lower casing 3 and an upper casing 5, and a lower casing 3 and upper The casing 5 is provided with a fixing screw 4, and the lower casing 3 is provided with a base 1 , and the casings 3 and 5 are further provided with a synchronous multi-combined power motor stator fixing screw 6 and a fixing function, and an insulating material 14 is also provided. 17 insulation is provided, the junction box 9 is provided with a power cord, and the entire motor is fixed by a fixing screw 2 on the base 1. The motor poles of these three motors are 10-40 pairs, and the air gap is not uniform. Of course, the number of motors here can be increased or decreased as needed, but at least two, the motor generally uses a permanent magnet brushless synchronous motor.

A main power shaft 7 is arranged in the casing, and the bearings 15 and 25 on the main power shaft 7 support and transmit three sets of motors on one side or both sides of the main power shaft 7, and the first group of motors includes a rotor 30 and Set Sub 26 , the second set of electric machines comprises a rotor 34 and a stator 31 , the third set of electric machines comprising a rotor 38 and a stator 35 , the rotor fixing nuts 19 , 21 , 24 acting as fixed rotors 30 , 34 , 38 , respectively.

The rotors 30, 34, 38 are cast from stainless steel, and the inner wall surfaces of the rotors 30, 34, 38 are respectively embedded with magnetic conductive steel sheets 39, 41, 42. The surfaces of the magnetic conductive steel sheets 39, 41, 42 are surrounded and uniform. Pasted with 20-40 magnet permanent magnets 29, 33, 37. The magnetic steel permanent magnet 29 is provided with a clutch 28, and the clutch 28 is connected to the main power shaft 7 via a connecting plate 18. The magnetic steel permanent magnet 37 is provided with a clutch 40. The clutch 40 is connected to the main power shaft 7 via a connecting plate 18, and the rotor 34 is connected. Directly connected to the main power shaft 7. Magnetic steel permanent magnets 29, 33, 37 are disc V-shaped magnetic steel permanent magnets, and magnetic steel permanent magnets 29, 33, 37 are made of rare earth neodymium iron boron permanent magnet material.

The stators 26, 31, 35 of the motor are composed of stator set magnetic brackets 45, 48, 51 cores 43, 46, 49 and winding coils 44, 47, 50 wound around cores 43, 46, 49, respectively. The cores 43, 46, and 49 of the stators 26, 31, and 35 are disc cores which are formed by winding silicon steel sheets from the inside to the outside, and the sides of the cores 43, 46, and 49 are formed. Winding coils 44, 47, 50 and Hall elements for sensing the sensed position of the rotor are embedded in the slots, respectively. The side groove of the disc core has an angle of 0 to 120 degrees, and the side groove is a V-shaped chute with an inclination angle of 0-30 degrees. The side slot winding coils 44, 47, 50 are wound on the corresponding disk core in units of three wire enameled wires, respectively.

The disc type permanent magnet synchronous multi-combined power DC motor unit is connected with the main power shaft by a plurality of motors, which can effectively reduce the volume of the high power motor. For example, three sets of 20-25 watt disc motors can output 60 kW of power to the main power shaft, but the volume is only less than one third of the 60 kW conventional column motor.

Generally, the external characteristics of the motor used in electric vehicles are: Under the rated speed Nmr, it works in constant torque mode, and above the rated speed, it works in constant power mode. Corresponding motor The number options include: motor rated power Pmr, motor maximum power Pmmax, motor rated speed Nmr and motor maximum speed Nmmax. For example, the start of three motors is: 20 kW χ 3 = 60 kW, voltage 300 volts, starting current 84 A X 3 = 252 amps per set, which is less than 50% of the starting current of a conventional column motor.

In addition, the disc-type permanent magnet synchronous multi-combined power DC motor group can quickly start the electric vehicle, which shortens the discharge time of the large current and speed. Especially when a certain speed is reached, one to two sets of motors can be automatically turned off by the clutch, so that the power and energy of the motor can be more properly played, so that each group of motors can be guaranteed to work at the highest efficiency point. If the three sets of motors are running at the highest efficiency point, the motor's current is 50 amps x 3 = 150 amps, and the current is only 50 amps to 100 amps when the group is turned off or the two groups are turned off. This is a traditional column. The motor can't be reached, because the 50A "100A current combined power motor is twice or three times the power of the traditional column motor. The disc type permanent magnet synchronous multi-combined power DC motor unit is higher than the start and speed. The conventional column motor is twice as large, especially when the vehicle starts and accelerates, the current discharge amount of the motor is the largest. Therefore, the current saving of the disc type permanent magnet synchronous multi-combined power DC motor group when starting the speed increase is also a conventional column motor. Doubled.

Furthermore, the disc permanent magnet synchronous multi-combined power DC motor group mainly uses a permanent magnet brushless synchronous motor, which has no excitation copper loss, high efficiency, high power factor, small volume, high power density, and frequency conversion speed regulation. The basic speed control mode of permanent magnet brushless synchronous motor. At the same time, the high-tech DC-disc motor controller is matched with it, and the information collection method of the high-tech high-speed computer chip is used to make the combined power disc DC motor work optimally.

The above is a detailed description of a warm water circulating water bath gasifier provided by an embodiment of the present invention. For those skilled in the art, according to the idea of the embodiment of the present invention, there will be a change in the specific embodiment and application range. In summary, the contents of this manual should not be construed as The invention is not intended to be limited by the scope of the invention.

Claims

A disc-type permanent magnet synchronous multi-combined power DC motor unit includes a casing, wherein the casing is provided with a main power shaft, wherein: the casing is further provided with at least two sets of motors, wherein one set of motors The rotor is fixedly coupled to the main power shaft, and the rotors of the remaining sets of motors are coupled to the main power shaft via a clutch.

The disc-type permanent magnet synchronous multi-combined power direct current motor unit according to claim 1, wherein: the iron core of the stator of the motor is a disc iron formed by winding a silicon steel sheet from the inside to the outside. a core, a side coil of the disk core is embedded with a winding coil and a Hall element for detecting a sensing position of the rotor, the rotor of the motor is cast from stainless steel, and a magnetic conductive steel piece is embedded in the inner wall surface of the rotor The surface of the magnetic conductive steel sheet is surrounded and uniformly hooked with a plurality of magnetic steel permanent magnets, and the magnetic conductive steel sheet is connected to the main power shaft.

The disc type permanent magnet synchronous multi-combined power direct current motor unit according to claim 1, wherein: the angle of the side groove of the disc core is 0 to 120 degrees.

The disc type permanent magnet synchronous multi-combined power direct current motor unit according to claim 1, wherein: the side groove of the disc core is a V-shaped chute, and the inclination angle is 0-30 degrees.

A disc-type permanent magnet synchronous multi-combined power direct current motor unit according to claim 1, wherein: said magnetic steel permanent magnet is a disc V-shaped magnetic steel permanent magnet.

The disc-type permanent magnet synchronous multi-combined power direct current motor unit according to claim 1, wherein: the surface of the magnetic conductive steel sheet is circumferentially and uniformly pasted with 20-80 pieces of magnetic steel permanent magnets. The disc-type permanent magnet synchronous multi-combined power direct current motor unit according to claim 1, wherein: the material of the magnetic steel permanent magnet is a rare earth neodymium iron boron permanent magnet material.

The disc type permanent magnet synchronous multi-combined power direct current motor unit according to claim 1, wherein: the motor has a pole number of 10-40 pairs. A disc-type permanent magnet synchronous multi-combined power direct current motor unit according to claim 1, wherein: said motor uses a non-uniform air gap.

A disc type permanent magnet synchronous multi-combined power direct current motor unit according to claim 2, wherein: said winding coil is wound on said disc core in units of three line enameled wires.