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Permanent magnetism synchronous electric machine - compressor system high speed operation control method

A permanent magnet synchronous motor and compressor system technology, applied in the direction of single motor speed/torque control, motor generator control, AC motor control, etc., can solve problems of little significance

Inactive Publication Date: 2008-08-27
TSINGHUA UNIV
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Problems solved by technology

But because the output square wave can only increase the output voltage of the inverter by 10%, the overmodulation control is of little significance for expanding the constant torque output area of ​​the motor

Method used

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  • Permanent magnetism synchronous electric machine - compressor system high speed operation control method
  • Permanent magnetism synchronous electric machine - compressor system high speed operation control method
  • Permanent magnetism synchronous electric machine - compressor system high speed operation control method

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Embodiment Construction

[0095] Specific embodiments of the present invention are described below in conjunction with accompanying drawing:

[0096] Fig. 4 is a structural block diagram of the hardware system of the present invention. The experimental hardware of the present invention adopts the motor control development system PE-Expert of Japan Myway Company, and this platform utilizes the DSP chip V85OIA4 of NEC Company, and adopts C language programming. The hardware system is mainly composed of PC, DSP board, A / D converter, D / A converter, PWM generator and two-level voltage inverter specially designed for AC motor vector control. The system of the present invention detects the current of the PMSM stator circuit and the DC bus voltage of the inverter through the sensor, uses the development system PE-Expert to perform AD conversion, and performs position sensorless vector control in its DSP, as well as coordinate transformation, PI adjustment and other modules . A single-mode overmodulation meth...

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Abstract

Disclosed is a high-speed control method for a permanent magnet synchronous motor-compressor system, including the following steps: initial design is carried out; a motor is detected through DSP, including detecting the two-phase current of the stator of the motor, the voltage Udc of a DC generatrix; the voltage of a d-p shaft is calculated; faults of overcurrent, overpressure and undervoltage are detected; if any fault exists, the PWM pulse signals are blocked and then the control program is paused; if no fault exists, the following steps will be carried out; the rotating speed of the motor and the position of the rotor are identified in the process of speed-position estimation; the current and the voltage of the reference d-q shaft of the motor are calculated; switching signals of an inverter are acquired through haplotype over-modulation; the data are recorded and waveforms are displayed; judgment of whether to pause the control program is carried out; if not, the second step is carried out again; if yes, the control program will be paused. The control method applies haplotype over-modulation method into the permanent magnet synchronous motor-compressor system, realizing sensorless over-modulation to the synchronous motor-compressor vector control system.

Description

technical field [0001] The invention relates to a motor control technology, in particular to a motor control technology in which a permanent magnet synchronous motor is applied to a frequency conversion air conditioning system. Background technique [0002] With the active promotion of energy-saving and consumption-reducing technologies around the world, inverter air conditioners have gradually attracted the attention of the market because of their unique advantages, and the compressor system, which is compared to the heart of air conditioners, has become a hot research topic. [0003] Due to the characteristics of the power supply of the frequency converter and the particularity of the operation of the compressor, ordinary asynchronous motors (Induction Motor-IM) often have problems such as low efficiency and high noise, and it is difficult to achieve good operating performance. Permanent Magnet Synchronous Motor (PMSM) has the characteristics of simple structure, small siz...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P6/18H02P6/08H02P6/185H02P6/28H02P27/12
Inventor 刘葵孙凯黄立培
Owner TSINGHUA UNIV
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