Electric vehicle control apparatus
First Claim
1. An electric vehicle control apparatus, which includes at least a main thyristor for chopping a direct current flowing through an electric vehicle driving DC motor and a flywheel diode connected in parallel with said DC motor to form a path for conducting a flywheel current therethrough when said main thyristor is nonconductive, and which is fixed onto an electric vehicle body, comprising:
- (A) a base member of said electric vehicle control apparatus fixed onto said vehicle body being in close contact therewith;
(B) a heat sink made of a metallic plate and fixed onto a portion of said base member through a thin sheet of an insulating material intervening therebetween, said heat sink has a substantially square shape;
(C) at least two substantially bare semiconductor pellets fixed directly onto said heat sink, each of said pellets being mounted on said heat sink, each of said pellets being mounted on said heat sink near one of four corners of said heat sink, and small capacity semiconductor devices are mounted on said heat sink near the remaining one of said four corners, said pellets constituting at least said main thyristor, said flywheel diode and a plugging diode;
(D) a plurality of connecting terminals each constituted by an L-shaped metallic bar which is mounted on one of said pellets and extends horizontally away from the pellet to which it is mounted and then bends upward leaving a suitable length of the horizontal portion thereof; and
(E) at least one auxiliary electric device fixed onto said base member.
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Accused Products
Abstract
An electric vehicle control apparatus fixed onto an electric vehicle body and including at least a main semiconductor device and a flywheel diode comprises a base member thereof fixed onto said vehicle body being in close contact therewith, a heat sink made of a metallic plate and fixed onto a portion of said base member through a thin sheet of an insulating material intervening therebetween, at least two pellets fixed directly onto said heat sink which pellets constitute at least said main semiconductor device and said flywheel diode, connecting terminals each thereof mounted on each of said pellets, and at least one auxiliary electric device fixed onto said heat sink.
18 Citations
12 Claims
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1. An electric vehicle control apparatus, which includes at least a main thyristor for chopping a direct current flowing through an electric vehicle driving DC motor and a flywheel diode connected in parallel with said DC motor to form a path for conducting a flywheel current therethrough when said main thyristor is nonconductive, and which is fixed onto an electric vehicle body, comprising:
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(A) a base member of said electric vehicle control apparatus fixed onto said vehicle body being in close contact therewith; (B) a heat sink made of a metallic plate and fixed onto a portion of said base member through a thin sheet of an insulating material intervening therebetween, said heat sink has a substantially square shape; (C) at least two substantially bare semiconductor pellets fixed directly onto said heat sink, each of said pellets being mounted on said heat sink, each of said pellets being mounted on said heat sink near one of four corners of said heat sink, and small capacity semiconductor devices are mounted on said heat sink near the remaining one of said four corners, said pellets constituting at least said main thyristor, said flywheel diode and a plugging diode; (D) a plurality of connecting terminals each constituted by an L-shaped metallic bar which is mounted on one of said pellets and extends horizontally away from the pellet to which it is mounted and then bends upward leaving a suitable length of the horizontal portion thereof; and (E) at least one auxiliary electric device fixed onto said base member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric vehicle control apparatus, which includes at least a main thyristor for chopping a direct current flowing through an electric vehicle driving DC motor and a flywheel diode connected in parallel with said DC motor to form a path for conducting a flywheel current therethrough when said main thyristor is nonconductive, and which is fixed onto an electric vehicle body, comprising:
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a base member of said electric vehicle control apparatus fixed onto said vehicle body being in close contact therewith, a heat sink made of a metallic plate and fixed onto a portion of said base member through a thin sheet of an insulating material intervening therebetween, said heat sink has a substantially square shape, at least two substantially bare semiconductor pellets fixed directly onto said heat sink, each of said pellets being mounted on said heat sink near one of four corners of said heat sink, and small capacity semiconductor devices are mounted on said heat sink near the remaining one of said four corners, said pellets constituting at least said main thyristor, said flywheel diode and a plugging diode, a plurality of connecting terminals each constituted by an L-shaped metallic bar which is mounted on one of said pellets and extends horizontally away from the pellet to which it is mounted and then bends upward leaving a suitable length of the horizontal portion thereof, and at least one auxiliary electric device fixed onto said base member, said pellets being molded with an insulating synthetic resn material, wherein each of said L-shaped metallic bars constituting each one of said connecting terminals projects from a side of each of said molded members molded with said insulating synthetic resin material.
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Specification