Snubber circuit
First Claim
1. A snubber circuit including a protection circuit connected to a first terminal, a second terminal, and a control input terminal, comprising:
- a voltage detecting circuit including a capacitor and a diode connected in series between the first and second terminals, or between the first terminal and the control input terminal;
the protection circuit connected between the first and second terminals, configured to prevent an overvoltage between the first and second terminals in accordance with a voltage of the control input terminal; and
a voltage control circuit configured to bypass a portion of a main current flowing between the first and second terminals to the protection circuit when a voltage at both ends of the capacitor exceeds a predetermined voltage,wherein a cathode electrode of the diode is connected to a side of the first terminal, and an anode electrode of the diode is connected to a side of the second terminal or the control input terminal having a voltage lower than a voltage of the first terminal.
1 Assignment
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Accused Products
Abstract
A snubber circuit has a voltage detection circuit which detects that a voltage between first and second terminals exceeds a predetermined voltage, a protection circuit which performs control to prevent an overvoltage between the first and second terminals when the voltage detection circuit detects that the voltage between the first and second terminals exceeds the predetermined voltage, and a voltage control circuit which bypasses a portion of a main current flowing between the first and second terminals to the protection circuit when the voltage detection circuit detects that the voltage between the first and second terminals exceeds the predetermined voltage.
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Citations
16 Claims
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1. A snubber circuit including a protection circuit connected to a first terminal, a second terminal, and a control input terminal, comprising:
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a voltage detecting circuit including a capacitor and a diode connected in series between the first and second terminals, or between the first terminal and the control input terminal; the protection circuit connected between the first and second terminals, configured to prevent an overvoltage between the first and second terminals in accordance with a voltage of the control input terminal; and a voltage control circuit configured to bypass a portion of a main current flowing between the first and second terminals to the protection circuit when a voltage at both ends of the capacitor exceeds a predetermined voltage, wherein a cathode electrode of the diode is connected to a side of the first terminal, and an anode electrode of the diode is connected to a side of the second terminal or the control input terminal having a voltage lower than a voltage of the first terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification