Power Integrations, Inc.

Emmanuel Belen Antonio

John Emmanuel Atienza Tan

Jhaebhee Mark Quiroz Calderon

John Henry Rementilla Puente

A system controller for a motor drive system comprising a phase current reconstructor configured to perform operations. The operations comprise receiving a stator current angle and a plurality of phase current sense signals from a plurality of respective devices that in operation drive the motor drive system, selecting, based on the received stator current angle, a reference table from among a plurality of reference tables that store reconstruction scaling factors for respective phase currents, obtaining, from the selected reference table, respective reconstruction scaling factors for the respective phase currents, generating, from the obtained reconstruction scaling factors, respective reconstructed phase current magnitude values for the plurality of devices, and outputting the reconstructed phase current magnitude values.

Motor phase current reconstruction

A method for aligning a motor to a goal alignment position, comprising beginning an alignment sequence, receiving a phase current of the motor, sampling the received phase current, and comparing a sample of the received phase current to a previous sample of the received phase current. The method further comprises tracking a maximum value of the phase current in response to comparing the sample of the received phase current to the previous sample of the received phase current, comparing the maximum value of the received phase current to the sample of the received phase current, detecting a decrease in the received phase current in response to comparing the maximum value to the sample; and ending the alignment sequence in response to detecting the decrease.

Motor alignment control

A motor drive system for use with a motor comprising a first high-side switch coupled to a high voltage bus and the motor. A first low-side switch coupled to the motor and a return, a turn ON and turn OFF of the first high-side switch and the first low-side switch provides a phase current for the motor. A system controller configured to receive a phase current sense signal representative of the phase current of the motor and configured to begin an alignment sequence to align the motor to a goal alignment position, wherein during the alignment sequence at least one of the first high-side switch or the first low-side switch is turned ON and OFF having an alignment duty ratio, and the system controller is configured to end the alignment sequence in response to a sensed decrease in the phase current sense signal or a first duration has elapsed.

Growing community of inventors

SANTO TOMAS, Philippines

Emmanuel Belen Antonio