Alternator power converter
First Claim
1. An alternator for converting direct current to alternating current comprising:
- a switching power module having a switching elements for converting power by switching, a driving circuit section for driving the switching element and a resin case for housing the switching element;
a smoothing capacitor for smoothing power output of a DC power source supplied to the switching element;
a control circuit section for outputting a control signal to the driving circuit section for control operation of the switching element;
and a cooling member for cooling the switching element, wherein, a ceramic capacitor is used as the smoothing capacitor and a smoothing capacitor board for mounting the smoothing capacitor is provided in the switching power module between an insulating board for mounting the switching element and a driving circuit board for mounting the driving circuit section, and the smoothing capacitor board functions also as an electromagnetic shielding plate for protecting the driving circuit section against switching noise from the switching element.
1 Assignment
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Accused Products
Abstract
The present invention provides an alternator having a small size and a high reliability wherein, the alternator is equipped with a switching power module 1 having a resin case 13 housing switching elements 2 and a driving circuit section 5, a smoothing capacitor 7 for smoothing a direct current output supplied to the switching elements 2, a control circuit section 6 for outputting a control signal to the driving circuit section 5 and a cooling member 24; a ceramic capacitor is used as the smoothing capacitor; a smoothing capacitor board 25 for mounting the smoothing capacitor 7 is disposed between an insulating board mounting with the switching elements 2 and a driving circuit board 18 mounting with the driving circuit section 5; and the smoothing capacitor board 25 functions also as an electromagnetic shielding plate for protecting the driving circuit section 5 against the switching noise of the switching elements.
66 Citations
3 Claims
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1. An alternator for converting direct current to alternating current comprising:
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a switching power module having a switching elements for converting power by switching, a driving circuit section for driving the switching element and a resin case for housing the switching element;
a smoothing capacitor for smoothing power output of a DC power source supplied to the switching element;
a control circuit section for outputting a control signal to the driving circuit section for control operation of the switching element;
and a cooling member for cooling the switching element, wherein, a ceramic capacitor is used as the smoothing capacitor and a smoothing capacitor board for mounting the smoothing capacitor is provided in the switching power module between an insulating board for mounting the switching element and a driving circuit board for mounting the driving circuit section, and the smoothing capacitor board functions also as an electromagnetic shielding plate for protecting the driving circuit section against switching noise from the switching element. - View Dependent Claims (2, 3)
the smoothing capacitor and smoothing capacitor board are electrically connected via a smoothing capacitor mounting member having a flexible lead portion. -
3. An alternator according to claim 1 characterized in that,
the smoothing capacitor is fixed to the smoothing capacitor board by means of a smoothing capacitor fixing member made of a material with good heat conducting properties.
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Specification