Mitsubishi Denki Kabushiki Kaisha

Mitusbishi Denki Kabushiki Kaisha

Gorab Majumdar

Tooru Iwagami

Satoshi Mori

Hisashi Kawafuji

Mitsutaka Iwasaki

Khalid Hassan Hussein

Yoshio Takagi

Sukehisa Noda

An inverter circuit to reduce a resistor for overcurrent detection and decrease the number of filters in an inverter circuit for supply polyphase power. Transistors each having a current detection terminal and a protective diode for regenerative current are adopted as switching elements on an 'L' side and their current detection terminals are connected in common to a resistor. Therefore, a voltage drop caused by a current flowing in the resisytor becomes larger when an overcurrent flows in at least one of the transistors and further when an overcurrent flows in a switching element on an 'H' side even if no overcurrent flows in any one of the transistors.

Inverter circuit

An inverter circuit to reduce a resistor for overcurrent detection and decrease the number of filters in an inverter circuit for supplying polyphase power. Transistors each having a current detection terminal and a protective diode for regenerative current are adopted as switching elements on an &ldquo;L&rdquo; side and their current detection terminals are connected in common to a resistor. Therefore, a voltage drop caused by a current flowing in the resistor becomes larger when an overcurrent flows in at least one of the transistors and further when an overcurrent flows in a switching element on an &ldquo;H&rdquo; side even if no overcurrent flows in any one of the transistors.

Semiconductor device

Growing community of inventors

Tokyo, Japan

Gorab Majumdar