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Position sensor-free vector control device for built-in permanent magnetic synchronous motor

A permanent magnet synchronous motor, vector control technology, applied in vector control systems, motor generator control, control of electromechanical transmissions, etc., can solve problems such as system runaway, achieve good low-speed operation performance, strong robustness, and achieve magnetic field The effect of precise directional control

Active Publication Date: 2012-02-22
哈尔滨工大正元信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the excessive position observation error caused by the load disturbance process, the position observation value converges to the S pole direction and the system is out of control, and the low-speed operation control performance of the built-in permanent magnet synchronous motor without position sensor cannot be effectively improved. problem, providing a built-in permanent magnet synchronous motor sensorless vector control device

Method used

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  • Position sensor-free vector control device for built-in permanent magnetic synchronous motor
  • Position sensor-free vector control device for built-in permanent magnetic synchronous motor
  • Position sensor-free vector control device for built-in permanent magnetic synchronous motor

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specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination Figure 1 to Figure 4 Describe this embodiment mode, a built-in permanent magnet synchronous motor position sensorless vector control device described in this embodiment mode, it includes a speed controller unit 100, a first current controller unit 101, a second current controller unit 102, a high Frequency voltage signal generation unit 103, direct-axis voltage superposition unit 104, coordinate rotation inverse transformation unit 105, power converter unit 106, low-pass filter unit 108, three-phase to two-phase coordinate transformation unit 109, coordinate rotation transformation unit 110, High-frequency current signal processing unit 111, rotor position observer unit 112, speed calculation unit 113 and current detection sensor 114,

[0018] After the speed given command signal A1 and the estimated speed value B1 pass through the speed controller unit 100, the quadrature-axis torque current given value D1 is...

specific Embodiment approach 2

[0036] Specific Embodiment 2: This embodiment further describes Embodiment 1. The high-frequency current signal processing unit 111 includes a three-phase stationary to two-phase rotating coordinate transformation unit 201, a cosine function calculation unit 202, a No. 1 band-pass filter unit 203, No. 2 band-pass filter unit 204, No. 1 multiplication unit 205, No. 2 multiplication unit 206, No. 1 low-pass filter unit 207, No. 2 low-pass filter unit 208, current root-mean-square calculation unit 209, subtraction unit 210 and division operation unit 211,

[0037] The stator current sampling signal O1 is adjusted by the three-phase stationary to two-phase rotating coordinate transformation unit 201 to output the quadrature-axis current component A2 and the direct-axis current component B2. The value of the transformation angle C1 is 45°, twice the high-frequency voltage electrical angle After passing through the cosine function operation unit 202, the high-frequency signal E2 is ...

specific Embodiment approach 3

[0046] Embodiment 3: This embodiment further describes Embodiment 1. The rotor position observer unit 112 includes a No. 1 integral computing unit 301, a No. 2 integral computing unit 302, a No. 3 integral computing unit 303, a No. 4 integral computing unit 304, No. 1 gain unit 305, No. 2 gain unit 306, No. 3 gain unit 307, No. 4 gain unit 308, torque calculation unit 309, No. 1 addition unit 310, No. 2 addition unit 311,

[0047] The rotor position error signal R1 also passes through the No. 3 gain unit 307 to obtain the No. 3 gain signal A3, and the rotor position error signal R1 also passes through the No. 4 gain unit 308 to obtain the No. 4 gain signal I3.

[0048] The rotor position error signal R1 passes through the No. 1 integral operation unit 301 to obtain the No. 1 integral signal B3, and the No. 1 integral signal B3 passes through the No. 2 gain unit 306 to obtain the No. 2 gain signal C3, and the No. 2 gain signal C3 passes through the No. 2 integral operation unit ...

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Abstract

The invention discloses a position sensor-free vector control device for a built-in permanent magnetic synchronous motor and belongs to the field of motor control. The position sensor-free vector control device aims to solve the problems that overlarge position observation error is caused during load disturbance, the system is out of control when a position observed value is restrained to an S-pole direction and the position sensor-free low-speed running control performance of the built-in permanent magnetic synchronous motor cannot be improved effectively in the prior art. The position sensor-free vector control device comprises a rotating speed controller unit, a first current controller unit, a second current controller unit, a high-frequency voltage signal generation unit, a straight shaft voltage superposition unit, a coordinate spinning inverse transformation unit, a power converter unit, a low-pass filter unit, a three phase to two phase coordinate transformation unit, a coordinate spinning transformation unit, a high-frequency current signal processing unit, a rotor position observer unit, a rotating speed calculation unit and a current detection sensor. The control devicecan avoid a phenomenon that the system is out-of-control when the position observed value is restrained to the S-pole direction.

Description

technical field [0001] The invention relates to a position sensorless vector control device for a built-in permanent magnet synchronous motor, which belongs to the field of motor control. Background technique [0002] The built-in permanent magnet synchronous motor has the advantages of high efficiency, energy saving and wide speed range, and has been widely used in the fields of electric vehicle drive, ship propulsion, numerical control system and household appliances. The vector control of high-performance permanent magnet synchronous motor requires rotor position and speed information, which is usually obtained by installing a mechanical position sensor. However, the installation of the position sensor brings a series of problems, such as increased system cost, reduced reliability, increased size, and reduced anti-interference ability. In order to further broaden the application field of permanent magnet synchronous motor control system, a variety of mechanical sensorles...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P21/18H02P21/24
Inventor 王高林杨荣峰于泳徐殿国李刚张国强吴芳
Owner 哈尔滨工大正元信息技术有限公司
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