Controller for power device and drive controller for motor
First Claim
1. A controller for controlling a power device in response to an input signal wherein said power device includes a series connection of a first and second semiconductor device which are connected between first and second main power supply potentials with the conduction of at least said first semiconductor device being controlled by a control signal and with a common node of said first and second semiconductor device providing an output and with said input signal being generated as a function of said second main power supply potential, said controller comprising:
- first signal generating means for generating a first signal in response to said input signal;
level shift means for changing an output level of said first signal to a value which is a function of said first main power supply potential in order to produce a second signal; and
a first control signal generator means for generating said control signal for said first semiconductor device in response to said second signal,wherein said level shift means includes at least one level shifting semiconductor element between said first and second main power supply potentials wherein said semiconductor element is controlled by said first signal and said at least one level shifting semiconductor element exhibiting breakdown voltage characteristics whereby a breakdown voltage has a value not less than a voltage in the range between a value of said first and a value of said second main power supply potential.
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Accused Products
Abstract
A controller for power devices which is not required to individually insulate high and low potential portions and to include an insulated power supply is disclosed. An external controller (6) is connected to a second internal control circuit (4) which is in turn connected to a level shift circuit (5) and a gate electrode of a transistor (Q2). Power supply voltage (V1) is applied to the second internal control circuit (4) for operation thereof. The level shift circuit (5) is connected to a first internal control circuit (3) which is in turn connected to a gate electrode of a transistor (Q1) and a charge pump circuit (7). Control of a first semiconductor circuit is made through the level shift means in response to an input signal generated on the basis of a second main power supply potential, thereby achieving increased responsiveness of the power devices to a control signal and improved integration.
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Citations
17 Claims
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1. A controller for controlling a power device in response to an input signal wherein said power device includes a series connection of a first and second semiconductor device which are connected between first and second main power supply potentials with the conduction of at least said first semiconductor device being controlled by a control signal and with a common node of said first and second semiconductor device providing an output and with said input signal being generated as a function of said second main power supply potential, said controller comprising:
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first signal generating means for generating a first signal in response to said input signal; level shift means for changing an output level of said first signal to a value which is a function of said first main power supply potential in order to produce a second signal; and a first control signal generator means for generating said control signal for said first semiconductor device in response to said second signal, wherein said level shift means includes at least one level shifting semiconductor element between said first and second main power supply potentials wherein said semiconductor element is controlled by said first signal and said at least one level shifting semiconductor element exhibiting breakdown voltage characteristics whereby a breakdown voltage has a value not less than a voltage in the range between a value of said first and a value of said second main power supply potential. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A drive controller for a motor, comprising:
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a controller for controlling a power device in response to an input signal wherein said power device includes a series connection of a first and second semiconductor device which are connected between first and second main power supply potentials with the conduction of at least said first semiconductor device being controlled by a control signal and with a common node of said first and second semiconductor device providing an output and with said input signal being generated as a function of said second main power supply potential, said controller comprising; first signal generating means for generating a first signal in response to said input signal; level shift means for changing an output level of said first signal to a value which is a function of said first main power supply potential in order to produce a second signal; and a first control signal generator means for generating said control signal for said first semiconductor device in response to said second signal, wherein said level shift means includes at least one level shifting semiconductor element between said first and second main power supply potentials wherein said semiconductor element is controlled by said first signal and said at least one level shifting semiconductor element exhibiting breakdown voltage characteristics whereby a breakdown voltage has a value not lesser than a voltage in the range between a value of said first and a value of said second main power supply potential; wherein said controller is integrated on a single or a plurality of semiconductor substrates and is driven by a single operation power supply for feeding a voltage between said first and second main power supply potentials; a brake circuit in parallel with said first and second semiconductor devices for applying an electrical brake to said motor in response to a predetermined stop signal; and a converter circuit for rectifying an AC power supply to provide said first and second main power supply potentials, said first and second semiconductor devices, said controller, said brake circuit and said converter circuit being provided in the form of a module. - View Dependent Claims (15, 16, 17)
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Specification