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Control system for permanent magnet synchronous motor

A permanent magnet synchronous motor and control system technology, applied in the control system, vector control system, motor generator control, etc., can solve the problems of increasing reactive power loss of devices, restricting the scope of use, and grid interference, etc., to increase reactive power loss , Increase environmental adaptability, quick response effect

Inactive Publication Date: 2014-06-11
南京恒誉名翔科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the permanent magnet synchronous motor device usually requires an angular position sensor, which restricts the use range of the device, and the uncontrolled rectification in the variable frequency drive brings interference to the power grid, especially the high-order harmonic components in the current, which increase the reactive power of the device. loss

Method used

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  • Control system for permanent magnet synchronous motor

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Embodiment Construction

[0016] When the system is running, close the air switch on the external operation control panel, supply power to the rectifier circuit through the three-phase AC power supply, adjust the speed setting button on the external operation control panel, and set the speed as required, and the set speed is transmitted to the digital control circuit through the bus Form the speed command. Press the start button on the external operation control panel, and the start command is sent to the digital control circuit, so that the rectifier circuit and inverter circuit start to work, and provide three-phase power with variable frequency and voltage amplitude to the permanent magnet synchronous motor. Accelerate to the set speed according to a certain acceleration time. When it is necessary to stop the motor, press the stop button on the external operation control panel, and the stop command is sent to the digital control circuit to make the rectifier circuit and inverter circuit work, reduce...

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Abstract

The invention provides a control system for a permanent magnet synchronous motor. The control system mainly comprises a three-phase power source, a rectifying circuit, a logical circuit, the permanent magnet synchronous motor, a detection circuit, an external control panel, an external interface, a digital control circuit, a brake resistor and a power amplification circuit. The external control panel is used for setting the rotation speed of the permanent magnet synchronous motor and the time when the permanent magnet synchronous motor starts and stops and transmits the given information to the digital control circuit, and the digital control circuit controls the power amplification circuit to form voltage signals needed by control over the permanent magnet synchronous motor.

Description

Technical field: [0001] The invention relates to a motor control system, in particular to a permanent magnet synchronous motor control system. Background technique: [0002] In the industrial field, the device of motor + reducer or belt reduction wheel is widely used, but the use of the reduction mechanism seriously affects the working efficiency of the device and increases the loss of the device. Therefore, a direct drive device is designed to replace the original device. Permanent magnet synchronous motors have the characteristics of high output torque, excellent low-speed characteristics, high efficiency, and wide speed range, and are especially suitable for direct-drive actuators. However, the permanent magnet synchronous motor device usually requires an angular position sensor, which restricts the use range of the device, and the uncontrolled rectification in the variable frequency drive brings interference to the power grid, especially the high-order harmonic component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/10
Inventor 李冰李相武王瑛
Owner 南京恒誉名翔科技有限公司
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