Patent
Controller for induction motor
Masato c,o Mitsubishi Denki K.K. Sangyo Koyama,Akira c,o Mitsubishi Denki K.K. Imanaka,Masahiko c,o Mitsubishi Denki K.K. Iwasaki +5 more
TLDR
In this paper, an error current component which becomes zero when an actual value of a primary flux coincides with a set value inducted by a product of an exciting current command and a primary self-inductance by detecting a primary current of an inductance motor, is inducted.Abstract:
An error current component which becomes zero when an actual value of a primary flux coincides with a set value inducted by a product of an exciting current command and a primary self-inductance by detecting a primary current of an inductance motor, is inducted by an error current component processing circuit. A primary resistance compensation circuit processes a compensation amount of a primary resistance compensation amount. And a compensation voltage processing circuit processes a compensation voltage which directs the error current component to zero. A rotating speed of the induction motor can be controlled in a stable state even though a value of primary resistance of the induction motor is varied by temperature. Further, inadequate torque and excess current can be avoided.read more
Citations
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Journal ArticleDOI
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References
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Patent
Starter-generator utilizing phase controlled rectifiers to drive a dynamoelectric machine as a brushless motor in the starting mode to increase the torque output of the machine through phase angle control by reducing the machine counter EMF
TL;DR: In this article, a dynamoelectric machine is driven as a brushless DC motor to start a dynamic load such as a jet engine and as a synchronous constant frequency generator after the jet engine is ignited and brought up to speed.
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Method of controlling inverter-driven induction motor
TL;DR: In this article, the rotational speed of an induction motor is estimated based on the detected torque current component and the speed of the motor is controlled such that the estimated speed signal coincides with a speed command signal.
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TL;DR: In this article, the authors proposed an AC current control system for controlling multi-phase AC currents supplied from a power converter to a load, where the currents are detected and coordinate-transformed into orthogonal two-axis current values i d, i q in a rotating coordinate rotating at an angular frequency ω, and then compared with the references.
Patent
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Vector control method and system for an induction motor
TL;DR: In this paper, the decoupling calculation and 2-3 phase transformation are combined to simplify the system configuration and the plus and minus signs of trigonometric signals are changed according to the rotational direction to enable four-quadrant operation.