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Sensorless rotor initial angle detection apparatus and method for permanent magnet direct drive motor

A technology of permanent magnet direct drive and motor rotor, which is applied to the control of electromechanical transmission devices, control of generators, motor generator control, etc. It can solve problems such as the inability to detect the initial angle of the motor rotor, and achieve fast detection speed, good stability, small error effect

Active Publication Date: 2016-02-10
HANGZHOU WAHAHA PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this invention is that the initial angle of the motor rotor cannot be detected

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  • Sensorless rotor initial angle detection apparatus and method for permanent magnet direct drive motor
  • Sensorless rotor initial angle detection apparatus and method for permanent magnet direct drive motor
  • Sensorless rotor initial angle detection apparatus and method for permanent magnet direct drive motor

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0057] Such as figure 1 The illustrated embodiment is a sensorless permanent magnet direct drive motor rotor initial angle detection device, including an inverter circuit 1, three current sensors 2 and a single-chip microcomputer 3, and the inverter circuit includes 3 groups of field effect transistors 4 , 3 groups of field effect tubes are electrically connected to the motor 5 through 3 wires respectively, and 3 current sensors are respectively located on the 3 wires; the single-chip microcomputer includes an ADC detection processing unit 31, an instruction generation unit 32, an angle identification unit 33, and an IPARK unit 34. SVPWM unit 35, PARK unit 36 ​​and CLARKE unit 37; instruction generation unit, IPARK unit, SVPWM unit and 3 groups of field effect transistors are connected in sequence; 3 current sensors, ADC detection processing un...

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Abstract

The invention discloses a sensorless rotor initial angle detection apparatus and method for a permanent magnet direct drive motor. The detection apparatus comprises an inverter circuit, three current sensors and a single chip microcomputer; the inverter circuit comprises three groups of field-effect transistors; the three group of field-effect transistors are electrically connected with a motor through three wires separately; the three current sensors are positioned on the three wires; and the single chip microcomputer comprises an ADC detection processing unit, an instruction generation unit, an angle identification unit, an IPARK unit, an SVPWM unit, a PARK unit and a CLARKE unit. The sensorless rotor initial angle detection apparatus and method have the characteristic of low computation cost, high detection speed, low pulse jitter, low error and good stability.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a sensorless permanent magnet direct drive motor rotor initial angle detection device and method with fast detection speed, small error and good stability. Background technique [0002] With the development of sensorless technology for permanent magnet motors, sensorless methods based on back EMF are widely used. However, when the motor is stationary or at low speed, the back EMF of the motor is very small, and it is very difficult to obtain angle information from the back EMF. , the identification of the initial rotor angle can not only make the motor start stably, but also make the torque of the motor reach the maximum value when starting. For this reason, in recent years, the key technology of the sensorless startup process has become a research hotspot. [0003] At present, there are constant space voltage vector method and saliency method for rotor sensorless initial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/18
Inventor 白政巧祝闽曲强郝兆礼刘砚徐敏珍
Owner HANGZHOU WAHAHA PRECISION MACHINERY