Texas Instruments Corporation

Rujun Ji

Jun Zhang

Yi Zhou

Hao Meng

Ge Shen

Cong Deng

Lichang Cheng

Kangcheng Xu

Methods and apparatus to determine a position of a rotatable shaft of a motor are disclosed. An example apparatus to determine a position of a rotatable shaft of a motor includes a sensor printed circuit board (PCB) structured to be mounted to a motor, the sensor PCB including a plurality of capacitive sensors, the plurality of capacitive sensors having respective ones of a plurality of capacitances that independently change as a conductor moves relative to the sensor PCB in conjunction with a rotatable shaft of the motor during an operation of the motor, and a controller electrically coupled to the sensor PCB, the controller configured to determine a position of the rotatable shaft based on the plurality of capacitances.

Methods and apparatus to determine a position of a rotatable shaft of a motor

An electric energy meter for a poly-phase electricity network includes a power transformer having a primary side and a secondary side, a first analog front end (AFE) unit is coupled to the secondary side of the power transformer, and a microcontroller coupled to the primary side of the power transformer. The first AFE unit is to be coupled to a first phase of the poly-phase electricity network. The microcontroller is configured to transmit a digitized request signal to, and to receive a measurement signal from, the first AFE unit via the power transformer. More specifically, the first AFE unit, upon receiving the digitized request signal, is to extract information from the digitized request signal.

Bi-directional electric energy meter

Example capacitive-sensing rotary encoders and methods are disclosed herein. An example apparatus includes a rotary encoder structured to be mounted to a motor, the rotary encoder including a plurality of circumferential capacitive sensor arrays, each of the plurality of capacitive sensor arrays having an output representing a binary bit of a rotary encoder output, the rotary encoder output changing as a conductor rotates responsive to a rotatable shaft of the motor relative to the rotary encoder.

Capacitive-sensing rotary encoders and methods

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Shanghai, China

Rujun Ji