WO2013177899A1

WO2013177899A1 - Halbach array permanent magnet, high-efficiency, energy-saving, textile-manufacturing motor

Info

Publication number: WO2013177899A1
Application number: PCT/CN2012/083888
Authority: WO
Inventors: 夏长亮; 陈炜; 乔照威
Original assignee: 天津工业大学
Priority date: 2012-05-31
Filing date: 2012-10-31
Publication date: 2013-12-05
Also published as: CN102684400A

Abstract

A Halbach array permanent magnet, high-efficiency, energy-saving, textile-manufacturing motor comprising: a Halbach array permanent magnet textile-manufacturing motor (1), a controller (2), and a detection and sampling circuit (3). The Halbach array permanent magnet textile-manufacturing motor is integrally constituted by a converter (11) and a Halbach array permanent magnet synchronous motor (12). An output of the converter (11) is connected respectively to the Halbach array permanent magnet synchronous motor (12) and to the detection and sampling circuit (3). An output of the detection and sampling circuit is connected to the controller (2). The controller (2) is connected to the converter (11). The motor obviates a transmission between the motor and a load, reduces system energy losses, increases system conversion efficiency, and reduces system size.

Description

Halbach array permanent magnet energy efficient textile motor

The invention relates to a textile-specific motor. In particular, it relates to a Halbach array permanent magnet energy-efficient textile motor with mechatronic integration technology. Background technique

Among the major projects in China's energy-saving projects, motor and system engineering has become one of the industries with the most energy-saving potential. At present, China is actively promoting and supporting the development and implementation of high-efficiency motor and motor system energy-saving projects. At the same time, it has put forward new and higher requirements for the development and application of energy-saving special, industrial-specific motors and inverter control devices. As a large household of electricity in China, the textile industry has a running time of more than 7,000 hours, making it one of the key industries for the promotion of high-efficiency and energy-saving special motor series products.

The development of the motor system has become an integrated system integrating power electronics, motors and control. Due to the traditional discrete mode in China, the three are designed and manufactured by different manufacturers, and the production links are isolated and closed, resulting in unreasonable matching of motor system technical parameters, difficult operation coordination, and difficult to control control technology, which reduces the overall operating efficiency of the system. Therefore, the structure of the motor industry needs to be transformed from a single motor production mode to a mechatronics motor system production mode; the promotion of high-efficiency energy-saving technology requires a high-efficiency development model from the traditional purely high-efficiency development model to the motor system integration product. Conversion.

At present, due to the insufficient attention paid to the development of motor products in China's motor industry, the rapid response market's ability to expand is weak, resulting in the replacement of ordinary motors in many applications, resulting in slow progress in the industry's motor specialization rate, industry economic benefits and social benefits. The increase is low. In order to improve the load matching characteristics and realize the efficient operation of the motor system, it is necessary to focus on developing special motors and systems for different industries and applications, breaking the current situation of using the same type of motors in various applications, and increasing the market share of special motors.

In recent years, permanent magnet synchronous motors have achieved rapid development and application in the textile machinery industry due to their simple structure, high operating efficiency, high power factor and good control performance. The surface-mount permanent magnet synchronous motor usually adopts a conventional magnet structure, and the air gap magnetic density harmonic content is large, which affects the motor torque characteristics and the loss heat, so that the permanent magnet synchronous motor is limited in performance requirements and special applications.

In addition, in order to control the normal operation of the motor, the rotor position and speed signals are usually obtained by sensors mounted on the motor shaft to achieve field orientation and speed adjustment. However, the use of sensors increases the cost of the system. Some high-precision sensors even occupy a major share of the cost. The increase in system size limits its application in space-constrained applications, and the sensor requires high installation accuracy. On the one hand, the system reliability is reduced, the number of wires between the motor and the control system is increased, the system is susceptible to external interference, and its accuracy is susceptible to environmental temperature, humidity, dust, vibration, etc., therefore, for high temperature, high humidity, dusty The textile motor working environment, the application of the motor system with sensors is limited. Summary of the invention

The technical problem to be solved by the present invention is to provide a synergistic and matching characteristic between the components of the motor system, expand the application space of the permanent magnet synchronous motor in the textile industry, and realize the high efficiency and energy saving of the Halbach array permanent magnet for achieving high efficiency and energy saving goals of the motor system. Textile motor. The technical solution adopted by the invention is: a Halbach array permanent magnet energy-efficient textile motor, comprising: a Halbach array permanent magnet textile motor, a controller and a detection and sampling circuit, wherein the Halbach array permanent magnet textile motor is composed of a converter And the Halbach array permanent magnet synchronous motor is integrally formed, the output of the converter is respectively connected to a Halbach array permanent magnet synchronous motor and a detection and sampling circuit, the output of the detecting and sampling circuit is connected to the controller, and the controller is connected Converter.

The converter adopts a dual PWM voltage source type converter, and the controller includes a driving and protection circuit, a DSP main control circuit connected to the driving and protection circuit, and a signal conditioning circuit connected to the DSP main control circuit. The signal input end of the signal conditioning circuit is connected to the output of the detection and sampling circuit, the signal output end of the DSP main control circuit is connected to the driving and protection circuit, and the output of the driving and protection circuit is connected to the converter.

The driving and protection circuit includes a driving chip U1. The signal input end of the driving chip U1 is connected to the signal output end of the DSP main control circuit, and the three signal output ends of the driving chip U1 are connected to the signal input end of the converter. .

The converter adopts a matrix converter, and the controller comprises a driving and protection circuit, a DSP main control circuit connected to the driving and protection circuit, and a signal conditioning circuit connected to the DSP main control circuit, wherein The signal input end of the signal conditioning circuit is connected to the output of the detection and sampling circuit, the signal output end of the DSP main control circuit is connected to the driving and protection circuit, and the output of the driving and protection circuit is connected to the converter.

The driving and protection circuit includes a driving chip U2. The signal input terminal IN of the driving chip U2 is connected to the signal output end of the DSP main control circuit, and the signal output end of the driving chip U2 and the ground terminal are connected to the signal of the converter. Input.

The detecting and sampling circuit is a current detecting unit, the current detecting unit adopts a current sensor U3, the IN end of the current sensor U3 is connected to the current output end of the converter, and the OUT end of the current sensor U3 is connected to the Halbach. An input end of the array permanent magnet synchronous motor 12, a power input end of the current sensor U3 is connected to an external power supply, and a signal output end Imeas of the current sensor U3 is connected to the signal conditioning circuit.

The Halbach array permanent magnet synchronous motor includes a motor shaft sequentially disposed outward from a center, a stator and an armature winding wound around the stator, an air gap, a continuous Halbach permanent magnet array, and a rotor, the armature winding The star connection and the short-distance winding are used, and the rotor is a surface-mounted permanent magnet.

The Halbach array permanent magnet synchronous motor includes a motor shaft sequentially disposed outward from a center, a stator and an armature winding wound around the stator, an air gap, a segmented Halbach permanent magnet array, and a rotor, the armature The windings are star-connected, short-distance windings, and the rotors are surface-mounted permanent magnets.

The Halbach array permanent magnet high-efficiency energy-saving textile motor of the invention has the following beneficial effects as follows:

1. The Halbach array permanent magnet synchronous motor of the invention has a good sinusoidal air gap magnetic density, reduces torque ripple, and is beneficial to improve the positioning accuracy of the motor, and the Halbach array permanent magnet synchronous motor has a magnetic focusing effect, increasing The air gap magnetic density is beneficial to increase the power density and torque density of the motor. In addition, Halbach array permanent magnet synchronous motor has good self-shielding effect of rotor magnetic circuit. Therefore, the rotor adopts non-ferromagnetic material, which reduces the volume of the motor, reduces the weight of the motor, reduces the moment of inertia, and helps improve the fast response of the motor. ability.

2. The Halbach array permanent magnet synchronous motor of the invention adopts an outer rotor structure, and the motor is directly coupled with the load, thereby eliminating the transmission mechanism between the motor and the load, reducing system energy loss, improving system conversion efficiency, and reducing system maintenance. Cost, improve system operation reliability. Since the permanent magnet is circumferentially mounted on the inner surface of the rotor, the permanent magnet is subjected to an outward force by the centrifugal force, so that it is firmly coupled to the rotor, thereby eliminating the need for special reinforcement measures and reducing Manufacturing costs. In addition, the use of the outer rotor structure improves the influence of load fluctuation on the running performance of the motor, and at the same time improves the temperature rise of the motor and improves the irreversible demagnetization capability of the permanent magnet.

3. The controller adopts sensorless control technology to obtain rotor position and speed information, eliminating mechanical sensors, saving system cost, reducing system volume, enhancing system reliability and anti-interference ability, enabling the motor to be at high temperature and humidity. The dusty textile motor runs reliably under the typical working environment. DRAWINGS

1 is a schematic structural view of a first embodiment of a Halbach array permanent magnet energy-efficient textile motor according to the present invention; FIG. 2 is a schematic structural view of a second embodiment of a Halbach array permanent magnet high-efficiency energy-saving textile motor according to the present invention; Schematic diagram of the driving circuit in the first embodiment of the Halbach array permanent magnet energy-efficient textile motor; FIG. 4 is a schematic diagram of the driving circuit in the second embodiment of the Halbach array permanent magnet energy-efficient textile motor of the present invention; FIG. 5 is a Halbach array of the present invention. FIG. 6 is a schematic structural view of a first embodiment of a Halbach array permanent magnet synchronous motor according to the present invention; FIG.

Figure 7 is a schematic view showing the structure of a second embodiment of a Halbach array permanent magnet synchronous motor in the present invention.

In the picture

1: Halbach array permanent magnet textile motor 2: controller

3: Detection and sampling circuit 11: Inverter

12: Halbach Array Permanent Magnet Synchronous Motor 13: Protection Signal

21: Drive and Protection Circuit 22: DSP Master Control Circuit

23: Signal Conditioning Circuit 24: Drive and Protection Circuit

121: rotor 122a: continuous Halbach permanent magnet array

122b: Segmented Halbach permanent magnet array 123: air gap

124: armature winding 125: armature winding

126: Motor shaft

The Halbach array permanent magnet energy-efficient textile motor of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings. As shown in FIG. 1 and FIG. 2, the Halbach array permanent magnet high-efficiency energy-saving textile motor of the present invention comprises: a Halbach array permanent magnet textile motor 1, a controller 2, and a detecting and sampling circuit 3, wherein the Halbach array permanent magnet textile motor 1 is composed of a converter 11 and a Halbach array permanent magnet synchronous motor 12, and the output of the converter 11 is respectively connected to a Halbach array permanent magnet synchronous motor 12 and a detection and sampling circuit 3, and the detection and sampling circuit 3 The output is connected to the controller 2, and the controller 2 is connected to the converter 11. The controller described in the present invention uses the sensorless control technology to obtain the rotor position and speed information, and generates a signal for controlling the power component of the converter to be turned on and off according to the actually detected stator current and voltage signals, thereby realizing the motor speed. The converter 11 and the Halbach array permanent magnet synchronous motor 12 are integrated, and have reasonable and accurate technical parameter matching characteristics.

As shown in FIG. 1, the converter 11 uses a dual PWM voltage source type converter, and the controller 2 includes a driving and protection circuit 21, a DSP main control circuit 22 connected to the driving and protection circuit 21, and And DSP main control circuit 22 Connected signal conditioning circuit 23, wherein the signal input end of the signal conditioning circuit 23 is connected to the output of the detection and sampling circuit 3, and the signal output end of the DSP main control circuit 22 is connected to the driving and protection circuit 24, the driving The output of the protection circuit 21 is connected to the converter 11.

In order to improve the system operation precision and processing speed, the DSP chip in this embodiment uses TI's TMS320F281X series or TMS320F2833X series products for signal processing and control functions, such as A/D conversion, rotor position and speed estimation, current and speed. Double closed loop control, etc.

The dual PWM voltage source converter topological structure used in this embodiment is an AC-DC-AC inverter circuit form, and the rectifier side and the inverter side are both PWM full control bridge circuits, and the control mode is flexible, and both can be realized. Vector control. Since the energy can flow in both directions, the system has good four-quadrant operating characteristics. The intermediate DC link connecting the rectifier side and the inverter side PWM circuit uses a large capacitor filter to obtain a smooth DC voltage. Controlling the PWM rectifier circuit allows the input current to be close to a sine wave and the input power factor is adjustable, thus enabling the input voltage to operate in phase. The rectification side control strategy mainly includes direct current control and indirect current control. The main difference is whether to introduce AC current feedback. Direct current control is achieved by introducing AC current feedback to track the input current command value to achieve an input power factor of 1. There are mainly hysteresis current control, fixed switching frequency current control, predictive current control and direct power control. Indirect current control controls the magnitude and phase of the input current by controlling the amplitude and phase of the input voltage, which is also known as phase and amplitude control. The inverter side control strategy mainly includes constant voltage frequency ratio control, slip frequency control, vector control, and direct torque control.

When the converter 11 adopts a dual PWM voltage source type converter as shown in FIG. 1, the driving and protection circuit 21 adopts an integrated IGBT driving module, as shown in FIG. 3, including a driving chip U1. The driving chip of the model M57962AL of the MITSUBISH company is used to form an IGBT driving circuit. The signal input terminal 14 of the driving chip U1 is connected to the signal output end of the DSP main control circuit 22, and the three signal output ends of the driving chip U1. C, G, E are connected to the signal input terminal of the converter 11.

As shown in FIG. 2, the converter 11 uses a matrix converter, the converter 11 uses a matrix converter, and the controller 2 includes a driving and protection circuit 24 connected to the driving and protection circuit 24. The DSP main control circuit 22 and the signal conditioning circuit 23 connected to the DSP main control circuit 22, wherein the signal input end of the signal conditioning circuit 23 is connected to the output of the detection and sampling circuit 3, and the signal of the DSP main control circuit 22 The output is coupled to a drive and protection circuit 24, and the output of the drive and protection circuit 24 is coupled to the converter 11.

The matrix converter topology used in this embodiment is a form of AC-AC frequency conversion circuit, which is composed of 9 bidirectional power switching elements, and each phase load can be connected with any one of the power sources. Simultaneous modulation of the output voltage and input current is achieved by a first order power conversion. It is also possible to achieve two-way flow of energy to ensure that the motor is operated in four quadrants. The output voltage is sinusoidal and the frequency is not affected by the grid frequency. The sinusoidal input current can be modulated, and the input power factor is independent of the load power factor, enabling unity power factor operation or reactive power compensation operation. There is no intermediate DC link and filter capacitor, compact structure, small size, high transmission energy density and high efficiency.

When the converter 11 is a matrix converter as shown in FIG. 2, the driving and protection circuit 24 is as shown in FIG. 4, and includes a driving chip U2, such as a driving chip of the model number TC4429 of the MICROCHIP company. In the IGBT driving circuit, the signal input terminal IN of the driving chip U2 is connected to the signal output end of the DSP main control circuit 22, and the signal output terminal G of the driving chip U2 and the grounding terminal GND are connected to the signal input end of the converter 11.

The protection circuit mainly involves an overvoltage protection circuit, an overcurrent protection circuit, a logic protection circuit, and an optocoupler isolation protection. The detection and sampling circuit 3 described in this embodiment uses sensorless control technology to obtain rotor position and velocity information. There are mainly sensorless control methods based on the ideal model of the motor and sensorless control methods based on signal injection. The basic principle is: The former obtains rotor position and velocity information according to the relationship between rotor position, speed and voltage, current, such as direct calculation method, back potential integration method, model reference adaptive method and observer method; the latter utilizes motor structure Physical characteristics, calculate rotor position and velocity information based on harmonic signals of voltage and current when the rotor is in different positions. In addition, intelligent control methods such as neural networks, fuzzy control, expert systems, adaptive control, etc. can also be used to estimate rotor position and velocity information.

The detecting and sampling circuit 3 is a current detecting unit. As shown in FIG. 5, the current detecting unit uses a current sensor U3, and the IN end of the current sensor U3 is connected to a current output end of the inverter 11, The OUT terminal of the current sensor U3 is connected to the input end of the Halbach array permanent magnet synchronous motor 12. The power input terminal of the current sensor U3 is connected to an external power supply, and the signal output terminal Imeas of the current sensor U3 is connected to the signal conditioning circuit 23. This embodiment uses a current sensor of the LAM model LAH25-NP.

The Halbach array permanent magnet synchronous motor of the invention is a Halbach array permanent magnet synchronous motor designed according to the relevant standards of the textile motor and its special requirements, and has the characteristics of: 1 high operating efficiency and power factor; 2 not only at the rated operating point High efficiency, and high efficiency in a wide operating range; 3 strong overload capability.

As shown in FIG. 6, the Halbach array permanent magnet synchronous motor 12 includes a motor shaft 126 sequentially disposed outward from the center, a stator 125, and an armature winding 124 wound around the stator 125, an air gap 123, and a continuous Halbach. The permanent magnet array 122a and the rotor 121 are formed by a star connection and a short-distance winding, and the rotor 121 is a surface-mounted permanent magnet.

As shown in FIG. 7, the Halbach array permanent magnet synchronous motor 12 includes a motor shaft 126 sequentially disposed outward from the center, a stator 125, and an armature winding 124 wound around the stator 125, an air gap 123, and a segmented type. The Halbach permanent magnet array 122a and the rotor 121, the armature winding 124 is a star-connected, short-distance winding, and the rotor 121 is a surface-mounted permanent magnet.

In the Halbach array permanent magnet synchronous motor 12 of the present invention, the rotor 121 is a surface-mounted permanent magnet, that is, the Halbach array permanent magnet 122a or 122b directly faces the air gap 123 to establish a main magnetic field. There are two implementations of the Halbach array permanent magnets, namely, the Halbach array permanent magnet 122a in FIG. 3 and the Halbach array permanent magnet 122b in FIG. 4. The former is to magnetize a permanent magnet ring that is not magnetized in a continuous manner according to a certain regularity. The latter is a combination of a plurality of pre-magnetized permanent magnets in a certain order.

The Halbach array permanent magnet synchronous motor used in the invention has good self-shielding function of the rotor magnetic circuit. Therefore, the rotor adopts a non-ferromagnetic material, which reduces the volume of the motor, reduces the weight of the motor, reduces the moment of inertia, and improves the motor. Fast response capability. At the same time, the Halbach array permanent magnet synchronous motor has good air gap magnetic sinusoidality, reduces torque ripple, improves the positioning accuracy of the motor, and has a magnetic focusing effect, and the air gap magnetic density is large, which improves the power density of the motor and Torque density.

The armature winding 124 of the stator 125 of the Halbach array permanent magnet synchronous motor used in the present invention adopts a short-distance winding mode to attenuate the harmonic potential of the winding.

The Halbach array permanent magnet synchronous motor used in the invention is designed as an outer rotor structure, that is, the rotor 121 is located outside the stator 125, and the motor can be directly coupled with the load, the intermediate transmission mechanism is omitted, the transmission loss is reduced, and the system conversion efficiency is improved. At the same time, the system maintenance cost is reduced and the system operation reliability is improved. In addition, since the Halbach array permanent magnets 122a or 122b are circumferentially mounted on the inner surface of the rotor, when the motor rotates, the permanent magnet is subjected to the influence of the centrifugal force. The external force is firmly bonded to the rotor, eliminating the need for special reinforcement measures and reducing manufacturing costs. Moreover, the outer rotor structure is used to improve the running stability and anti-interference ability of the motor, improve the temperature rise of the motor, and improve the anti-reversible demagnetization capability of the permanent magnet.

The present invention has been described in detail with reference to the embodiments, the preferred embodiments or the specific embodiments of the present invention. It is understood that the present invention is described by way of example only. Changes may be made in certain details, including combinations and combinations of components, and such variations and applications are intended to be within the scope of the invention.

Claims

Rights request

A Halbach array permanent magnet energy-efficient textile motor, characterized by comprising: a Halbach array permanent magnet textile motor (1), a controller (2) and a detection and sampling circuit (3), said Halbach array permanent magnet The textile motor (1) is composed of a converter (11) and a Halbach array permanent magnet synchronous motor (12), and the output of the converter (11) is respectively connected to a Halbach array permanent magnet synchronous motor (12) and detection and The sampling circuit (3), the output of the detecting and sampling circuit (3) is connected to the controller (2), and the controller (2) is connected to the converter (11).

2. The Halbach array permanent magnet energy efficient textile motor according to claim 1, wherein the converter (11) employs a dual PWM voltage source type converter, and the controller (2) includes a drive. And a protection circuit (21), a DSP main control circuit (22) connected to the driving and protection circuit (21), and a signal conditioning circuit (23) connected to the DSP main control circuit (22), wherein the signal conditioning circuit The signal input end of (23) is connected to the output of the detection and sampling circuit (3), and the signal output end of the DSP main control circuit (22) is connected to the driving and protection circuit (24), and the driving and protection circuit (21) The output is connected to the converter (11).

The Halbach array permanent magnet energy-efficient textile motor according to claim 2, wherein the driving and protection circuit (21) comprises a driving chip U1, and the signal input end of the driving chip U1 is connected to the DSP main Control circuit

At the signal output of (22), the three signal outputs (C, G, E) of the driver chip U1 are connected to the signal input of the converter (11).

4. The Halbach array permanent magnet energy efficient textile motor according to claim 1, wherein said converter (11) employs a matrix converter, and said controller (2) comprises a driving and protection circuit ( 24) a DSP main control circuit (22) connected to the driving and protection circuit (24) and a signal conditioning circuit (23) connected to the DSP main control circuit (22), wherein the signal conditioning circuit (23) The signal input end is connected to the output of the detection and sampling circuit (3), the signal output end of the DSP main control circuit (22) is connected to the driving and protection circuit (24), and the output connection connection of the driving and protection circuit (24) is changed. (11).

The Halbach array permanent magnet energy-efficient textile motor according to claim 2, wherein the driving and protection circuit (24) comprises a driving chip U2, and the signal input terminal IN of the driving chip U2 is connected to the DSP. The signal output end of the main control circuit (22), the signal output end (G) of the driving chip U2 and the ground end (GND) are connected to the signal input end of the converter (11).

The Halbach array permanent magnet energy-efficient textile motor according to claim 1, wherein the detecting and sampling circuit (3) is a current detecting unit, and the current detecting unit adopts a current sensor U3, The IN terminal of the current sensor U3 is connected to the current output terminal of the converter (11), and the OUT terminal of the current sensor U3 is connected to the input end of the Halbach array permanent magnet synchronous motor 12, and the power input terminal of the current sensor U3 is connected to the external power supply. The power supply, the signal output end Imeas of the current sensor U3 is connected to the signal conditioning circuit (23).

7. The Halbach array permanent magnet energy efficient textile motor according to claim 1, wherein the Halbach array permanent magnet synchronous motor (12) comprises a motor shaft (9) and a stator arranged in order from the center outward. (8) and an armature winding (7), an air gap (123), a continuous Halbach permanent magnet array (122a), and a rotor (121) wound around the stator (8), wherein the armature winding (7) is adopted The star connection, the short-distance winding, the rotor (121) uses a surface mount permanent magnet.

8. The Halbach array permanent magnet energy efficient textile motor according to claim 1, wherein the Halbach array permanent magnet synchronous motor (12) comprises a motor shaft (9) and a stator arranged in sequence from the center outward. (8) and an armature winding (7), an air gap (123), a segmented Halbach permanent magnet array (122a), and a rotor (121) wound around the stator (8), the armature winding (7) The star connection, short-distance winding, the rotor (121) uses a surface mount permanent magnet.