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Method for adjusting the efficiency of a synchronous machine

A technology of AC synchronous motors and synchronous motors, applied in the direction of single motor speed/torque control, sustainable manufacturing/processing, climate sustainability, etc., can solve problems such as lack of adjustment control efficiency

Active Publication Date: 2014-10-15
IRISMAN MH EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time, this kind of motor does not have the function of adjusting and controlling the efficiency. It is desired to maintain a constant efficiency under different operating conditions, so as to reduce the energy loss of the motor as much as possible.

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  • Method for adjusting the efficiency of a synchronous machine
  • Method for adjusting the efficiency of a synchronous machine
  • Method for adjusting the efficiency of a synchronous machine

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Embodiment Construction

[0020] The above-mentioned purpose of the present invention and its structural and functional characteristics will be described according to the preferred embodiments of the accompanying drawings.

[0021] see figure 1 shows that the present invention provides a method for adjusting and controlling the efficiency of an AC synchronous motor. figure 1 In is a vector diagram showing the electric vectors in the stator windings of each phase of a wound rotor AC synchronous machine. In this diagram we get the following formula:

[0022] V=E+(R+jXs)I (1)

[0023] Among them, V is the phase voltage, E is the induced electromotive force, R is the resistance of the phase winding, Xs is the synchronous reactance of the phase winding, and I is the phase current.

[0024] (1) It can also be written as V=E+ZsI, where Zs=R+jXs is the impedance of the synchronous phase winding.

[0025] In addition, according to figure 1 The vector diagram shown shows that the efficiency of an AC synchro...

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Abstract

Method for adjusting the efficiency of a synchronous machine, in particular of a synchronous motor, comprising: calculating the efficiency of the synchronous machine in a preset operating condition; measuring a phase current (I) in the windings of the stator of the synchronous machine in said preset operating condition; calculating the size of an angle (+-) between a phase voltage (V) and an induced electromotive force (E) in the windings of the stator of the synchronous machine in said preset operating condition; measuring a phase current (I') in said windings of the stator in an operating condition that is different from said preset condition; calculating the size of the angle (+-') between said phase voltage (V) and said induced electromotive force in said operating condition different from said preset condition; regulating the value of said phase voltage (V) and of said excitation current in such a manner as to return the value of the size of said angle to the value calculated in said preset operating condition.

Description

technical field [0001] The invention relates to a method for adjusting and controlling the efficiency of an AC synchronous motor, and in particular to a method for adjusting and controlling the efficiency of an AC synchronous motor with a wound rotor used as electric traction. Background technique [0002] The tuning control of the AC synchronous motor can be advantageously combined with tuning to control the torque or speed of the AC synchronous motor according to the Italian Angelo Gaetani patent (IT1329820). In the field of electric traction motion, it is known to use DC motors, excited in series, in parallel or individually, so that the torque or the speed can be fully modulated and controlled. Although these motors have excellent speed control or torque drive, the aforementioned motors have considerable problems with power distribution. Because the current value on the brush must ensure a limited value, and the measures taken due to safety conditions, so as to avoid th...

Claims

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Application Information

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IPC IPC(8): H02P6/08
CPCH02P6/08Y02P80/10
Inventor 安吉洛·蓋塔倪
Owner IRISMAN MH EQUIP