Inductor driving circuit
AssigneeMitsubishi Heavy Industries, Ltd.
InventorHiroshi Kawashima
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Abstract
In an inductor driving circuit, a DC voltage is applied between a positive terminal and a negative terminal. A series connection of an inductor and a transistor is provided between the positive terminal and the negative terminal. A gate control circuit is configured to turn on the transistor in response to the application of the DC voltage and turn off the transistor in response to the stop of the application of the DC voltage. A diode is connected between a source and a drain of the transistor to have a cathode connected to the positive terminal and an anode connected to the negative terminal. A feedback diode has a cathode connected to the positive terminal and an anode connected to the negative terminal.
Claims13
An inductor driving circuit, comprising:
- a positive terminal and a negative terminal, between which a DC voltage of a DC power supply is to be applied;
- a switching element provided between said DC power supply and said positive terminal and configured to apply, when turned on, said DC voltage between said positive terminal and said negative terminal and to terminate, when turned off, the application of the DC voltage;
- an inductor and a transistor connected in series between said positive terminal and said negative terminal;
- a gate control circuit configured to
- turn on said transistor in response to the application of said DC voltage to form a current path through said switching element, said inductor and said transistor, and
- turn off said transistor in response to a termination of the application of said DC voltage;
- a diode directly connected between a source and a drain of said transistor and having a cathode connected to said positive terminal and an anode connected to said negative terminal;
- an attenuation resistor connected between said source and said drain of said transistor;
- and
- a feedback diode having a cathode connected to said positive terminal and an anode connected to said negative terminal to form an attenuation current loop through said inductor, said attenuation resistor, and said feedback diode, when the application of the DC voltage is terminated by said switching element.
An inductor driving circuit, comprising:
- a positive terminal and a negative terminal, between which a DC voltage of a DC power supply is to be applied;
- a switching element provided between said DC power supply and said positive terminal and configured to apply, when turned on, said DC voltage between said positive terminal and said negative terminal and to terminate, when turned off, the application of the DC voltage;
- an inductor and a transistor that are connected in series between said positive terminal and said negative terminal;
- a gate control circuit configured to
- turn on said transistor in response to the application of said DC voltage to form a current path through said switching element, said inductor and said transistor, and
- turn off said transistor in response to a termination of the application of said DC voltage;
- a diode directly connected between a source and a drain of said transistor, wherein a cathode of said diode is connected to one of said source and said drain of said transistor and an anode of said diode is connected to the other of said source and said drain of said transistor, and wherein said one of said source and said drain of said transistor is on a side of the positive terminal whereas the other of said source and said drain of said transistor is on a side of the negative terminal;
- an attenuation resistor connected between said source and said drain of said transistor;
- and
- a feedback diode having a cathode connected to said positive terminal and an anode connected to said negative terminal to form an attenuation current loop through said inductor, said attenuation resistor, and said feedback diode, when the application of the DC voltage is terminated by said switching element,
- wherein said feedback diode and said diode are provided separately from each other and parallel to each other between said positive terminal and said negative terminal.
Dependencies are inferred from the claim text.