High voltage synchronous machine whole digitization vector control device
A synchronous motor, fully digital technology, applied in the field of AC-DC-AC frequency conversion device, can solve the problems of complex frequency spectrum, low input power factor, low output frequency, etc.
Active Publication Date: 2011-01-26
北京合康新能变频技术有限公司
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Problems solved by technology
[0006] 1. Limited by the frequency of the power grid and the pulse number of the converter circuit, the output frequency is low;
[0007] 2. The input power factor is low;
[0008] 3. The input current has large harmonic content and complex spectrum
Method used
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Embodiment Construction
[0028] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0029] as attached figure 1 , the high-voltage synchronous motor all-digital vector control device of the present invention is composed of the following technical features and units, three-phase high-voltage input phase-shifting isolation transformer, after phase-shifting isolation step-down multi-channel AC output, input to the power with energy feedback The unit module, the power unit module inverter output to the synchronous three-phase motor; the signal fed back by the position and speed sensor installed on the three-phase motor is transmitted to the programmable logic device through the optical transmitter, and the programmable logic device is processed by serial-to-parallel conversion Finally, the signal is sent to the digital signal processing DSP for data calculation and processing; the current feedback signal is sampled by the...
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The present invention is a high voltage synch motor digitalized vector control device which comprises a high voltage input dephasing isolating transformer and a power unit module that is provided with energy feedback. The two units are connected in series to form a three-phase high voltage variable frequency output. The present invention also consists of a digital processor, a programmable logic component, a digital high voltage synchronous machine vector controller that is formed by relative surrounding circuit, a rotor position and speed feedback encoder that is connected with the controlled synchronous motor with the same axle and a monitor transducer of the output current of the frequency changer; the surrounding circuit consists of an optical fiber connector and an upper monitor system that gives frequency. The present invention has the advantages of less pollution to the grid, needless of reactive-load compensation equipment, fast response, wide range of speed regulation ratio, actuated by constant torque and quadrant operating power.
Description
technical field [0001] The invention relates to a frequency conversion control device for a synchronous motor, in particular to an AC-DC-AC frequency conversion device, which is mainly used for full-digital vector control of a high-voltage synchronous motor. Background technique [0002] In terms of high-power AC synchronous motor transmission, AC-AC frequency conversion speed regulation transmission is the main one. Generally hundreds of kilowatts to thousands of kilowatts. It has been widely used in cement, mining and mining industry, metallurgical industry, chemical industry, oil and gas industry, non-ferrous metals, etc., especially the transmission and speed regulation of large mine hoists in mines. Transmission fields such as large capacity, low speed, high overload, fast response, and four-quadrant operation are mainly used in mine hoists and main rolling mills in steel mills. Most of the applications in such systems are high-power synchronous motors. The technology...
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IPC IPC(8): H02P6/00H02P21/00H02M5/451
Inventor 沈士军
Owner 北京合康新能变频技术有限公司