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Compressor starting method and apparatus

一种压缩机、最佳启动的技术，应用在起动的装置、机器/发动机、启动器零部件等方向，能够解决信息损失、启动失败等问题

Inactive Publication Date: 2013-05-15
WEIKEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to a loss of information about the shaft angle in sensor-less drive systems, and failure to start
[0006] These issues may prompt motors and frequency converters to be dimensioned for higher power than is required for average power and / or may be required for shaft angle sensors

Method used

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  • Compressor starting method and apparatus
  • Compressor starting method and apparatus

Examples

Experimental program
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Effect test

Embodiment Construction

[0024] figure 1 A known construction of a piston compressor is shown in which a piston 1 reciprocates inside a compression cylinder 2 . In this embodiment, said piston is driven by a crankshaft or similar via a connecting rod 3 through a rotating wheel 4 . The input gas enters the cylinder from the suction pipe 5 during the opening of the input valve 6 during the suction phase, ie during the movement of the piston away from the valve creating a vacuum inside the cylinder. During the compression phase, ie during the movement of the piston towards the valve, the gas is compressed and finally discharged into the pressure pipe 7 (with the discharge valve 8 open). The angular value (0°...270°) around the wheel 4 indicates the position mark of the attachment point of the connecting rod to the wheel and indicates the mechanical position of the piston during one cycle of operation rotation.

[0025] figure 2 shows drive wheel 4 ( figure 1 ) of the shaft or the corresponding torqu...

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PUM

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Abstract

A method of and an apparatus for starting a piston type compressor (C) driven by a permanent magnet synchronous motor (M) controlled by a frequency converter (FC), the method comprising at least following steps: a) indicating the position of the piston highest pressure point and aligning the rotor of the motor (M) at the optimal starting angle prior to the actual compression operation by providing a pre-pulse to rotate the rotor of the motor (M) at least one full rotation at a certain frequency (f 2 ), during rotation measuring the load torque by means of the frequency converter as well as indicating the maximum load torque point and at the end aligning the rotor of the motor (M) at the optimal starting angle of about 180 DEG from the maximum pressure angle, and b) at the beginning of the actual compression operation setting the rotor position opposite to the maximum torque angle by feeding direct current to the stator winding and starting the motor by supplying maximum motor current to the motor to give the maximum torque and acceleration.

Description

technical field [0001] The invention relates to a method and a device for controlling a compressor. The invention relates in particular to a method and a device for starting a piston type compressor driven by a frequency converter controlled permanent magnet synchronous motor. Background technique [0002] The simplicity, reliability, and cost-effectiveness of piston-type compressors make them popular heavy-duty machines in industrial and commercial applications, such as for generating compressed air. When the compressed air volume needs to be adjusted, speed control is usually used (due to its lower energy losses) rather than eg throttle control. Speed ​​control is usually achieved by a frequency converter controlled AC motor, which may be, for example, a cage asynchronous motor or a permanent magnet synchronous motor. [0003] In this application, the motor load varies significantly based on the piston position, ie, when the piston reaches the top position, the shaft tor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/20
CPCF04B35/04F04B49/06F04B2203/0201F04B2203/0207H02P1/04H02P6/22H02P21/34
Inventor W·吉旺特T·斯奈德A·多克塔尔
Owner WEIKEN CO LTD
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