A motor driving apparatus that drives a motor including a plurality of windings respectively corresponding to a plurality of phases, may include a first inverter including a plurality of first switching elements, and connected to a first end of each of the windings; a second inverter including a plurality of second switching elements, and connected to a second end of each of the windings; and a controller including a current controller to produce, based on a predetermined current command of the motor, a voltage command for determining a switching duty of the first switching elements and the second switching elements, wherein the current controller is configured to produce a zero-phase component voltage command among the voltage commands by applying 3.sup.rd harmonic feedforward compensation.

A motor driving apparatus that drives a motor including a plurality of windings respectively corresponding to a plurality of phases, may include a first inverter including a plurality of first switching elements, and connected to a first end of each of the windings; a second inverter including a plurality of second switching elements, and connected to a second end of each of the windings; and a controller including a current controller to produce, based on a predetermined current command of the motor, a voltage command for determining a switching duty of the first switching elements and the second switching elements, wherein the current controller is configured to produce a zero-phase component voltage command among the voltage commands by applying 3.sup.rd harmonic feedforward compensation.

A gate driver integrated circuit includes a high-side region that operates in a first voltage domain according to a first pair of supply terminals that include a first lower supply terminal and a first higher supply terminal; a low-side region that operates in a second voltage domain according to a second pair of supply terminals; at least one termination region that electrically isolates the high-side region from the low-side region; a first electrostatic device arranged in the high-side region and connected to the first pair of supply terminals; a second electrostatic device arranged in the low-side region and connected to the second pair of supply terminals; and a third electrostatic device connected to a lower supply terminal of the first pair of supply terminals and is coupled in series with the first electrostatic device.

A gate driver integrated circuit includes a high-side region that operates in a first voltage domain according to a first pair of supply terminals that include a first lower supply terminal and a first higher supply terminal; a low-side region that operates in a second voltage domain according to a second pair of supply terminals; at least one termination region that electrically isolates the high-side region from the low-side region; a first electrostatic device arranged in the high-side region and connected to the first pair of supply terminals; a second electrostatic device arranged in the low-side region and connected to the second pair of supply terminals; and a third electrostatic device connected to a lower supply terminal of the first pair of supply terminals and is coupled in series with the first electrostatic device.

Provided is a power conversion device for suppressing a variation amount of a bus current to decrease a power loss in consideration of control of detecting the bus current during operation. In control by a power conversion part in accordance with a switching signal, a voltage vector is caused to bring a mode into a power running mode at a timing of detecting the bus current when an AC rotating machine is in a power running operation state, and the voltage vector is caused to bring the mode into a regeneration mode at a timing of detecting the bus current when the AC rotating machine is in a regeneration operation state, thereby decreasing the power loss due to the variation in the bus current.

An energy-efficient and accurate torque control system and method for multiphase nonsinusoidal PMSM with or without open-circuited phase(s) under time-varying torque and speed conditions is based on orthogonally decomposing a phase voltage vector into two components, which become primary and secondary control inputs for torque control and energy minimizer control. The primary control system includes nonlinear feedback from measured phase currents, motor angle, motor speed, and instantaneous value of reference torque and a signature vector indicating which phase(s) is/are open-circuited to establish a first-order linear relationship between reference and generated torques. The secondary control system includes an estimator to estimate a system costate from measured phase currents, motor angle, motor speed, and instantaneous value of reference torque and the signature vector and a linear programming module with equality/inequality constraints to calculate the secondary voltage input to optimally align the overall phase voltage for maximum efficiency without saturating the inverter voltage.

A gate driver integrated circuit includes a high-side region that operates in a first voltage domain according to a first pair of supply terminals that include a first lower supply terminal and a first higher supply terminal; a low-side region that operates in a second voltage domain according to a second pair of supply terminals; a low-voltage region the operates in a third voltage domain; at least one termination region that electrically isolates the high-side region from the low-side region and the low-voltage region; a first electrostatic device arranged in the high-side region and connected to the first pair of supply terminals; a second electrostatic device arranged in the low-side region and connected to the second pair of supply terminals; and a third electrostatic device connected to a lower supply terminal of the first pair of supply terminals and is coupled in series with the first electrostatic device.

In a motor drive device 120, a phase compensation amount calculation unit 110 calculates a phase compensation amount Δθ for compensating a voltage phase θv* when a control mode is switched in a control selection unit 90. The control selection unit 90 outputs the three-phase voltage command Vuvw* according to any one of the plurality of control modes based on the modulation factor Kh*, the voltage phase θv*, and the phase compensation amount Δθ. A PWM control unit 100 outputs gate signals Gun, Gup, Gvn, Gvp, Gwn, and Gwv based on the three-phase voltage command Vuvw* and a rotor position θd. The inverter 20 has a plurality of switching elements, and controls the plurality of switching elements based on gate signals Gun, Gup, Gvn, Gyp, Gwn, and Gwv to drive the AC motor 10.

A method of controlling a dual-wound synchronous machine includes: determining positive and negative virtual half-motor current commands based on first and a second motor current commands associated with the first and second winding sets; calculating positive and negative final voltage commands based on the virtual half-motor current commands, and using first and second sets of gain factors; and commanding, based on the final voltage commands, inverters to apply an output voltage to each of two winding sets and thereby causing output currents to be generated herein. The output currents each have a d- and q-axis components, and at least one of the first set of gain factors and the second set of gain factors is configured to cause the d-axis component and the q-axis component of the first output current to be decoupled from variations of d-axis and q-axis components of the second output current.

A method of controlling a dual-wound synchronous machine includes: determining positive and negative virtual half-motor current commands based on first and a second motor current commands associated with the first and second winding sets; calculating positive and negative final voltage commands based on the virtual half-motor current commands, and using first and second sets of gain factors; and commanding, based on the final voltage commands, inverters to apply an output voltage to each of two winding sets and thereby causing output currents to be generated herein. The output currents each have a d- and q-axis components, and at least one of the first set of gain factors and the second set of gain factors is configured to cause the d-axis component and the q-axis component of the first output current to be decoupled from variations of d-axis and q-axis components of the second output current.