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US 7,609,016 B2Granted
Systems and methods for driving a motor
AssigneeInfineon Technologies AG
InventorRichard Alan Kraus
Life of this patent
Estimating the term…
Abstract
A control system includes a controller configured to provide a drive signal, and a switching device configured to generate an output control signal as a function of the drive signal in an on-state mode of operation. The control system also includes a timing network configured to receive the drive signal and output a gated signal to the switching device, wherein the gated signal maintains a relationship with a predetermined threshold during the on-state of operation of the switching device.
Claims15
A control system, comprising:
- a controller configured to provide a drive signal having a period associated therewith;
- a switching device configured to generate an output control signal as a function of the drive signal in an on-state mode of operation;
- and
- a timing network configured to receive the drive signal and output a gated signal to the switching device, wherein, when the drive signal is asserted, the gated signal maintains a relationship with a predetermined threshold to enable the switching device to alternate between a high-side current state of operation and a low-side current state of operation;
- and
- wherein, when the drive signal is continuously de-asserted for more than one period, the gated signal decays to maintain another, different relationship with the predetermined threshold.
3 more elements
A system for driving a motor, comprising:
- a controlling device configured to provide a drive signal having a drive cycle;
- a timing network configured to receive the drive signal and generate a gated signal as a function of the drive signal;
- and
- a switching device having an operational threshold and configured to receive both the drive signal and the gated signal;
- wherein, when the drive signal is asserted, the gated signal enables the switching device to deliver a high-side current and a low-side current as a function of the drive signal;
- and wherein, when the drive signal is continuously de-asserted for more than one drive cycle, the gated signal disables significant current from the switching device;
- wherein the controlling device is coupled to both the switching device and the timing network via a single primary electrical connection.
4 more elements
A method for driving a motor with a current switching device, comprising:
- receiving a drive signal at the current switching device, wherein the current switching device drives the motor in response thereto, wherein the drive signal comprises a pulse width modulation signal associated with a period and comprising a first state and a second state during an on-state of the motor;
- and
- processing the drive signal with a timing network to generate a gated signal with a decay region, the decay region starting at an initial de-assertion of the drive signal during the on-state of the motor and engineered to cross a predetermined threshold at a predetermined time that is multiple periods removed from the de-assertion to place the current switching device in an off-state during an off-state of the motor.
A high current half-bridge, comprising:
- a controller configured to provide a drive signal having a period associated therewith;
- a p-channel high-side metal oxide semiconductor field effect transistor for providing a high-side current and voltage;
- an n-channel low-side metal oxide semiconductor field effect transistor for providing a low-side current and voltage;
- a driver integrated circuit for selectively control the p-channel high-side metal oxide semiconductor field effect transistor and the n-channel low-side metal oxide semiconductor field effect transistor during an on-state as a function of the drive signal, and
- a timing network for providing a gated signal to the driver integrated circuit as a function of the drive signal, where the drive signal, when asserted, puts the driver integrated circuit in the on-state, and where the drive signal, when continuously de-asserted for multiple periods, puts the driver integrated circuit in an off-state.
2 more elements
Dependencies are inferred from the claim text.