DEVICE FOR CANCELING UNDESIRABLE MAGNETIC FIELD AROUND ON-LINE ELECTRIC VEHICLE, METHOD OF MANUFACTURING THE SAME, AND ON-LINE ELECTRIC VEHICLE CAPABLE OF CANCELING UNDESIRABLE MAGNETIC FIELD
First Claim
1. A method of manufacturing a device for canceling an undesirable magnetic field around an on-line electric vehicle, the method comprising:
- calculating a primary magnetic field generated by a current flowing through a power line which supplies power to the vehicle equipped with a power acquisition device;
calculating a first undesirable magnetic field which is a part of the primary magnetic field and does not induce a current in a power acquisition coil provided in the power acquisition device;
calculating a second undesirable magnetic field which is generated by the current induced in the power acquisition coil;
obtaining an entire undesirable magnetic field by calculating a vector sum of the first and second undesirable magnetic fields;
obtaining a number of turns of a coil to be wound around one end or both ends of the power acquisition device which maximally cancels the entire undesirable magnetic field; and
winding the coil around the end or ends of the power acquisition device in accordance with the obtained number of turns, and short-circuiting each coil.
1 Assignment
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Accused Products
Abstract
A method, for manufacturing a device for canceling an undesirable magnetic field around an on-line electric vehicle, the method comprising, calculating a primary magnetic field generated by a current flowing through a power line, calculating a first undesirable magnetic field, calculating a second undesirable magnetic field, obtaining an entire undesirable magnetic field by calculating a vector sum of the first and second undesirable magnetic fields, obtaining a number of turns of a coil to be wound around one end or both ends of the power acquisition device which maximally cancels the entire undesirable magnetic field, and winding the coil around the end or ends of the power acquisition device in accordance with the obtained number of turns, and short-circuiting each coil.
3 Citations
13 Claims
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1. A method of manufacturing a device for canceling an undesirable magnetic field around an on-line electric vehicle, the method comprising:
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calculating a primary magnetic field generated by a current flowing through a power line which supplies power to the vehicle equipped with a power acquisition device; calculating a first undesirable magnetic field which is a part of the primary magnetic field and does not induce a current in a power acquisition coil provided in the power acquisition device; calculating a second undesirable magnetic field which is generated by the current induced in the power acquisition coil; obtaining an entire undesirable magnetic field by calculating a vector sum of the first and second undesirable magnetic fields; obtaining a number of turns of a coil to be wound around one end or both ends of the power acquisition device which maximally cancels the entire undesirable magnetic field; and winding the coil around the end or ends of the power acquisition device in accordance with the obtained number of turns, and short-circuiting each coil. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for canceling an undesirable magnetic field around an on-line electric vehicle, the device comprising:
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a power acquisition device mounted on the vehicle equipped with a power acquisition coil for inducing a current by using a primary magnetic field generated by a power line; and a coil, wound around one end or both ends of the power acquisition device, for generating a magnetic field which is opposite from an entire undesirable magnetic field represented by a vector sum of a first undesirable magnetic field which is a part of the primary magnetic field and does not induce the current in the power acquisition coil and a second undesirable magnetic field which is generated by the current induced in the power acquisition coil, thereby canceling the entire undesirable magnetic field, wherein each coil is short-circuited. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An on-line electric vehicle capable of canceling an undesirable magnetic field, the vehicle comprising:
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a power acquisition device including a power acquisition coil for inducing a current by using a primary magnetic field generated by a power line, wherein the induced current is an Alternating Current (AC) signal; a rectifier for rectifying the AC signal; an inverter, connected to the rectifier, for converting the rectified AC signal to an target AC signal having a target voltage and frequency and outputting the target AC signal; a driving means for receiving the target AC signal and generating a rotating force; and a coil, wound around one end or both ends of the power acquisition device, for generating a magnetic field which is opposite from an entire undesirable magnetic field represented by a vector sum of a first undesirable magnetic field which is a part of the primary magnetic field and does not induce the current in the power acquisition coil and a second undesirable magnetic field which is generated by current induced in the power acquisition coil, thereby canceling the entire undesirable magnetic field, wherein each coil is short-circuited.
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Specification