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INVERTER AND CONVERTER THYRISTORS FIRING CONTROL FOR CSl-FED INDUCTION MOTOR
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| Author(s) |
G. Fekete; L. Szentirmai |
| Abstract |
Current-source inverter (CSI) -fed induction motor drive was developed recently for 4-quadrant operation without reactor (inductive coil) should be interconnected in DC circuit. New converter and inverter logic maintain revolving magnetic field even in that case if current-conduction in stator-winding of induction motor is discontinuous. The conduction ranges of appropriate thyristor-pairs are provided by code-network and within these stages synchronous signal generator carries out synchronous firing of 4 thyristors in every instant. Favourable dynamic features have also been achieved in this way. Energy is returned into the mains while induction motor works in generator action. The new drive operates at the university above: control systems incorporate r.p.m. control with subordinate current control, then slip-frequency and torque-angle control as well. Theory has been verified by oscilloscope records and oscillograms. The new system having patent pending is suitable for induction motors up to 300 kilowatts rated power without reactor in DC circuit. |
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| Filename: | Unnamed file |
| Filesize: | 3.119 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-03-12 by System |
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