Texas Instruments Corporation

Texas Instruments Incorporated Deutschland, Gmbh

Martin Staebler

Anant Shankar Kamath

Thomas Anton Leyrer

William Cronin Wallace

Navaneeth Kumar Narayanasamy

Matthieu Chevrier

Kristen N Mogensen

Sadia Arefin Khan

Vikas Kumar Thawani

Ferdinand Von Molo

Baher S Haroun

Ralf Peter Brederlow

Tobias Bernhard Fritz

Peter Fundaro

Jiri Panacek

A multi-channel digital isolator includes a digital isolator and an interlock circuit. The isolator includes a transmitter having a transmitter output, a receiver having a receiver input and a receiver output, an isolation barrier coupled between the transmitter output and the receiver input, and an output buffer having a buffer input and configured to output an isolated signal. The transmitter is configured to transmit an input signal across the isolation barrier. The interlock circuit has an interlock input coupled to the receiver output and an interlock output coupled to the buffer input. The interlock module is configured to prevent overlapping active states between the first isolated signal and a complementary isolated signal. In some implementations, the digital isolator also includes a dead-time insertion circuit.

Multi-channel digital isolator with integrated configurable pulse width modulation interlock protection

A motor system with an input for coupling to a motor control signal that, when presented in a predetermined state, indicates a motor receiving power should be disabled from rotating. The system also includes controller circuitry for providing a disabling signal to motor rotation, independent of processor software control signaling and the power, in response to the control signal.

Hardware based motor drive controller

A method includes receiving a chip select signal at an SPI client device. The method also includes, responsive to receiving the chip select signal, transmitting a first bit of an SPI transmission to an SPI host device, where the first bit of the SPI transmission is transmitted with a delay based at least in part on a loop propagation delay of an SPI channel. The method includes receiving a clock signal at the SPI client device. The method also includes, responsive to receiving the clock signal, transmitting a second bit of the SPI transmission to the SPI host device.

Propagation delay compensation for SPI interfaces

In described examples, a measurement circuit includes an isolated power supply that generates an output signal in response to an input signal. A signal processing circuit is coupled to the isolated power supply and generates a first signal in response to a sense signal. A load manipulator circuit is coupled to the signal processing circuit and the isolated power supply. The load manipulator circuit receives the first signal. A detect circuit is coupled to the isolated power supply and generates a second signal in response to the input signal.

Data transfer through an isolated power supply

An integrated communications subsystem (ICSS) includes a pulse-width modulator which drives a power stage, such as a motor. The pulse-width modulator is configured shut off the power stage when the pulse-width modulator receives a trip signal from a logic circuit of the ICSS. The logic circuit can easily be reprogrammed to send a trip signal only when certain error conditions are detected. Moreover, the ICSS contains one or more filters which can adjust the sensitivity of the logic circuit to error signals, enabling the ICSS to distinguish between true errors which require shutdown and glitches, which can be ignored during operation of the ICSS.

Managing pulse-width modulation trip signals from multiple sources

A sort buffer includes a phase sector determination circuit, a phase sector update circuit, and a phase sector completion circuit. The phase sector determination circuit is configured to determine a phase sector corresponding to a phase of a first sine and cosine sample pair received from an encoder or resolver. The phase sector update circuit is configured to determine whether a second sine and cosine sample pair corresponding to the phase sector is stored in a lookup table (LUT) and, in response to a determination that a second sine and cosine sample pair corresponding to the phase sector is not stored in the LUT, store the first sine and cosine sample pair in the LUT. The phase sector completion circuit is configured to determine whether the LUT has stored, for each of a plurality of phase sectors, a corresponding sine and cosine sample pair.

Motor drive phase sector buffer, offset and gain error circuitry

A motor drive circuit includes a first serializer-deserializer (SER-DES) module that converts first SER-DES input signals into a first SER-DES output serial data stream. The first SER-DES input signals relate to motor control inputs or motor drive power outputs. A second SER-DES module converts a second SER-DES input serial data stream corresponding to the first SER-DES output serial data stream into second SER-DES output signals. The second SER-DES input signals relate to motor drive power outputs or motor control inputs. A serial isolation channel provides a galvanic isolation barrier between the first SER-DES module and the second SER-DES module. The serial isolation channel communicates the first SER-DES output serial data stream across the galvanic isolation barrier to provide the second SER-DES input serial data stream.

Serializer-deserializer for motor drive circuit

Correcting offset and gain drift related angle errors with motor position detectors

In a procedure for the digital evaluation of the analogue output signals from a resolver with at least two stator windings, arranged perpendicular to each other on a stator, and at least one rotor winding on a rotor able to rotate in relation to the stator, a sinusoidal signal is applied to the rotor winding and sine, respectively cosine shaped signals, depending on the angular position of the stator in relation to the rotor, are extracted from the stator windings. These signals are further processed after conversion into digital signals by application of the inverse tangential function, in order to compute an angular value for the relative angular position between the rotor and the stator. This angular value is affected by a propagation delay time error, which is compensated for by the introduction of a control loop. Because of the inclusion of the control loop, both the angular velocity of the rotor as well as its relative angular position can be obtained without degradation by propagation time delay errors.

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Freising, Germany

Martin Staebler