Power supply for motor usable with an electric vehicle
First Claim
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1. An electric vehicle for generating at least part of a driving force by a motor, comprising:
- a driving circuit for driving said motor;
a power source unit for supplying electrical power to said motor, said power source unit being regeneratively charged by said motor;
a large-capacity capacitor that stores an electrical charge and supplies electrical power to said motor, said large-capacity capacitor being regeneratively charged by said motor;
a first sensor for detecting a voltage of said power source unit;
a second sensor for detecting a voltage of said large-capacity capacitor; and
means for distributing a regenerative power of said motor to said large-capacity capacitor and said power source unit, an amount of regenerative power distributed to said large-capacity capacitor and an amount of regenerative power distributed to said power source unit being determined in response to voltage detected by said first sensor and said voltage detected by said second sensor, so as to regeneratively charge said power source unit and said large-capacity capacitor.
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Abstract
A large-capacity capacitor (C1, C2) is connected in series and/or parallel with a battery (11). A voltage sensor (9, 10) is provided to the battery and/or the large-capacity capacitor to detect their terminal voltages. Input and output currents are limited between at least one of a motor driving circuit and the large-capacity capacitor and the battery on the basis of the detection signals from the voltage sensor. When the terminal voltage of the large-capacity capacitor is equal to or higher than a predetermined value, a current flowing from the motor driving circuit to the large-capacity capacitor is limited.
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Citations
22 Claims
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1. An electric vehicle for generating at least part of a driving force by a motor, comprising:
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a driving circuit for driving said motor; a power source unit for supplying electrical power to said motor, said power source unit being regeneratively charged by said motor; a large-capacity capacitor that stores an electrical charge and supplies electrical power to said motor, said large-capacity capacitor being regeneratively charged by said motor; a first sensor for detecting a voltage of said power source unit; a second sensor for detecting a voltage of said large-capacity capacitor; and means for distributing a regenerative power of said motor to said large-capacity capacitor and said power source unit, an amount of regenerative power distributed to said large-capacity capacitor and an amount of regenerative power distributed to said power source unit being determined in response to voltage detected by said first sensor and said voltage detected by said second sensor, so as to regeneratively charge said power source unit and said large-capacity capacitor. - View Dependent Claims (2, 3, 4, 8, 9, 10, 14, 21)
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5. An electric vehicle for generating at least part of a driving force by a motor, comprising:
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a driving circuit for driving said motor; a power source unit for supplying electrical power to said motor, said power source unit being regeneratively charged by said motor; a large-capacity capacitor that supplies electrical power to said motor, said large-capacity capacitor being regeneratively charged by said motor; a first sensor for detecting a first voltage of said large-capacity capacitor; a second sensor for detecting a second voltage of said power source unit; means for limiting a regenerative power from said driving circuit in response to said detected first voltage and said detected second voltage when said detected first voltage is greater than a first predetermined value and said detected second voltage is greater than a second predetermined value; and means for distributing an electrical power from said driving circuit to said large-capacity capacitor and said driving circuit, an amount of electrical power distributed to said large-capacity capacitor and an amount of electrical power distributed to said driving circuit being determined in response to said detected first voltage and said detected second voltage. - View Dependent Claims (6, 15, 18, 22)
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7. An electric vehicle for generating at least part of a driving force by a motor, comprising:
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a driving circuit for said motor; a source of electrical power; a first large-capacity capacitor connected in series with said source of electrical power; a first sensor for detecting a terminal voltage of said first large-capacity capacitor; a second large-capacity capacitor connected in parallel with said source of electrical power; a second sensor for detecting a terminal voltage of said second large-capacity capacitor; first current-limiting means for limiting a current flowing from said driving circuit to said first large-capacity capacitor when said terminal voltage detected by said first sensor is not less than a predetermined value; and second current-limiting means for limiting a current flowing from at least one of said driving circuit, said first large-capacity capacitor, and said source of electrical power into said second large-capacity capacitor when said terminal voltage detected by said second sensor is not less than a predetermined value. - View Dependent Claims (11, 12, 13)
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16. An apparatus for generating at least part of a driving force by a motor, comprising:
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means for driving said motor; means for supplying electrical power to said motor, said supplying means being regeneratively charged by said motor; means for smoothing said electrical power supplied by said supplying means, said smoothing means being connected between said supplying means and said driving means; means for storing an electrical charge, said storing means supplying electrical power to said motor, said storing means being regeneratively charged by said motor; means for detecting a voltage of said storing means; and means for distributing a regenerative power of said motor to said storing means and said supplying means, an amount of regenerative power distributed to said storing means and an amount of regenerative power distributed to said supplying means being determined in response to said voltage detected by said detecting means, so as to regeneratively charge said supplying means and said storing means. - View Dependent Claims (17, 19, 20)
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Specification