Semiconductor switch and power conversion system provided with semiconductor switch
First Claim
1. A semiconductor switch comprising:
- a main element having reverse conductivity and serving as a voltage-driven switching element having a high withstand voltage;
an auxiliary element serving as a voltage-driven switching element having a withstand voltage lower than that of the main element; and
a high-speed freewheel diode having a withstand voltage equal to that of the main element;
wherein a negative pole of the main element is connected to a negative pole of the auxiliary element to define a positive pole of the main element as a positive pole terminal and a positive pole of the auxiliary element as a negative pole terminal, and the high-speed freewheel diode is parallel-connected between the positive pole terminal and the negative pole terminal so that a direction from the negative pole terminal toward the positive pole terminal constitutes a forward direction.
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Abstract
A semiconductor switch is provided with a main element having reverse conductivity and serving as a voltage-driven switching element having a high withstand voltage, an auxiliary element serving as a voltage-driven switching element having a withstand voltage lower than that of the main element, and a high-speed freewheel diode having a withstand voltage equal to that of the main element, wherein a negative pole of the main element is connected to a negative pole of the auxiliary element to define the positive pole of the main element as a positive pole terminal and the positive pole of the auxiliary element as a negative pole terminal, and the high-speed freewheel diode is parallel-connected between the positive pole terminal and the negative pole terminal so that a direction from the negative pole terminal toward the positive pole terminal constitutes a forward direction.
140 Citations
14 Claims
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1. A semiconductor switch comprising:
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a main element having reverse conductivity and serving as a voltage-driven switching element having a high withstand voltage; an auxiliary element serving as a voltage-driven switching element having a withstand voltage lower than that of the main element; and a high-speed freewheel diode having a withstand voltage equal to that of the main element; wherein a negative pole of the main element is connected to a negative pole of the auxiliary element to define a positive pole of the main element as a positive pole terminal and a positive pole of the auxiliary element as a negative pole terminal, and the high-speed freewheel diode is parallel-connected between the positive pole terminal and the negative pole terminal so that a direction from the negative pole terminal toward the positive pole terminal constitutes a forward direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification