Electric motor car controller
First Claim
1. An electric motor car controller for smoothing DC power collected from an overhead wire via a filter reactor and a filter capacitor, converting the DC power into AC power with a power converter, driving a vehicle-driving AC motor, and calculating a voltage command to be applied to the power converter based on a d-axis current command value and a q-axis current command value commanded by a voltage coordinate converter, the electric motor car controller comprising:
- a voltage detector for detecting a voltage across the filter capacitor;
an energy amount calculator for calculating an amount of energy of the filter capacitor from the voltage detected by the voltage detector;
a frequency band component detector for extracting a given frequency band component contained in the amount of energy;
a frequency band component coefficient unit for multiplying the frequency band component by a given coefficient and outputting a q-axis current command correcting value; and
a q-axis current command correcting value adder for correcting the q-axis current command value by adding the q-axis current command correcting value to the q-axis current command value.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric motor car controller includes a voltage detector for detecting the voltage across a filter capacitor, an energy amount calculator for calculating the amount of energy of the filter capacitor from the output of the voltage detector, a frequency band component detector for extracting a given frequency band component included in the amount of energy, a frequency band component coefficient unit for multiplying the frequency band component by a coefficient and outputting a q-axis current command correcting value, and a q-axis current command correcting value adder for adding a q-axis current command correcting value to the q-axis current command value to correct the q-axis current command value.
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Citations
8 Claims
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1. An electric motor car controller for smoothing DC power collected from an overhead wire via a filter reactor and a filter capacitor, converting the DC power into AC power with a power converter, driving a vehicle-driving AC motor, and calculating a voltage command to be applied to the power converter based on a d-axis current command value and a q-axis current command value commanded by a voltage coordinate converter, the electric motor car controller comprising:
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a voltage detector for detecting a voltage across the filter capacitor;
an energy amount calculator for calculating an amount of energy of the filter capacitor from the voltage detected by the voltage detector;
a frequency band component detector for extracting a given frequency band component contained in the amount of energy;
a frequency band component coefficient unit for multiplying the frequency band component by a given coefficient and outputting a q-axis current command correcting value; and
a q-axis current command correcting value adder for correcting the q-axis current command value by adding the q-axis current command correcting value to the q-axis current command value. - View Dependent Claims (2, 3, 4)
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5. An electric motor car controller for smoothing DC power collected from an overhead wire via a filter reactor and a filter capacitor, converting the power into AC power with a power converter, driving a vehicle-driving AC motor, and calculating a voltage command to be applied to the power converter based on a d-axis current command value and a q-axis current command value commanded by a voltage coordinate converter, the electric motor car controller comprising:
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a current detector for detecting an electrical current passing through the filter reactor;
an energy amount calculator for calculating an amount of energy of the filter reactor from the current detected by the current detector;
a frequency band component detector for extracting a given frequency band component included in the amount of energy;
a phase compensator for multiplying the frequency band component by a given coefficient, providing phase compensation of the component, and outputting a q-axis current command correcting value; and
a q-axis current command correcting value adder for correcting the q-axis current command value by adding the q-axis current command correcting value to the q-axis current command value. - View Dependent Claims (6, 7, 8)
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Specification