Key features of the AC App – T222 Inverter platform

• Support any type of electric motor and position sensors
• Fast control loop and advanced modulation technics (OPP)
• Safety, Control, Configuration and Calibration API

System adaptation modules

• Safety Interface: Gate drivers (SPI or EPIO) and system I/O I/F
• Functional I/O interfaces: spare EPIOs, PWMs and ADC channels
• Gate driver interface: 3 or 6 phases

Parameters and configuration for calibration

• Default and customer safety fault detection and reaction
• Threshold, Min/Max, Enable/Disable, Coeff, Id/Id LUTs and more

Multiple EV system effects adding up for a more efficient vehicle

• Higher control loop and switching frequencies (>25 kHz to 100 kHz) with optimized Dead Time Compensation
• Short Circuit Withstand Time guarantee at < 300ns
• Advanced modulations (SVPWM, DPWM, 6-step PWM, OPP)
• Improve Total Harmonics Distortion (THD)
• Reduce HVDC Link Voltage Ripple

OPP (Optimized Pulse Pattern) is part of the Model-Based driven Predictive Control method that enables the delivery of unprecedented system performance in terms of energy efficiency, NVH, HVDC ripple, and more. Unlike SVPWM which is time-based, OPP has a variable number of switches that can be freely placed on any angular position of the motor.

OPP are generated for a defined set of operating points (speed/torque) using an OPP Generator / Solver delivered by Silicon Mobility. This tool uses motor loss models to find the OPPs suited for a targeted system
The generated OPPs are used online, in the AC App Inverter control software, depending on the operating points. Silicon Mobility goes even further by offering the possibility to apply the right modulation (between SVPWM, DPWM and OPP) upon the torque/speed need. This is the Adaptive PWM switching mechanism or APC.

View in details about the OPP (coming soon)

The AC App – T222 Inverter platform software can be used in two ways: either combined with a software platform (AUTOSAR or custom) within the ACU T222, or as a stand-alone software in the ACU T222 using the Auxiliary Function component. The Auxiliary Function is a recent feature of the AC App – T222 Inverter platform that allows customers to preserve their existing software platform in a remote MCU.

The Auxiliary Function reduces the integration effort when keeping a legacy software platform while benefiting from ACS performance boost.

View Article (4 min read)

By choosing the Auxiliary Function, ACU can be used in two different ways:

ACU as a companion chip

• ACU running AC App – T222 Inverter  + Bridge over CAN, viewed as a Complex Driver for AUTOSAR SW platform
• MCU running customer’s AUTOSAR SW platform
• MCU and ACU on the same board, direct connection by CAN, Safety integration optimization (no SBC)

ACU as a slave inverter controller

• ACU running AC App – T222 Inverter  + Bridge over CAN, viewed as a deported slave inverter controller
• Speed & Torque command sent by a central VCU/VDU
• Status & Safety collected by a central VCU/VDU

Safety matters to us.

We provide ISO 26262-certified safety software solutions for ASIL-D applications using ACU T222. Our suite includes essential documentation and safety work products validated for automotive safety standards, ideal for applications like electrified powertrain control.

We also provide off-the-shelf ISO 26262-certified solutions for customer design use. This offering encompasses a rich repository of functional safety documentation, including design rules, specifications, verification reports, functional and safety requirements, and Dependent Failure Analysis Reports (DFAR). These certifications validate the suitability of the ACS for car manufacturers and tier 1 automotive companies, particularly in developing safety-related applications like electrified powertrain control, following ISO 26262 standards.

AC Composer – T222 HVIC Starter Kit is based on a reference design board for inverter/electric motor control to enable AC technology evaluation, proof of concept, and rapid prototyping.

The Starter Kit includes:

• AC Composer HVIC Control Board with ACU T222.
• AC App – T222 Inverter
• Functional Vehicle Dependent Software demo code includes:
  • Remote Control Unit, XCP interface via CAN-FD
  • Diagnostics Interface
  • Basic system services inc. scheduler and CAN comm
• Post-build Measurement, configuration, calibration, and firmware update GUI software for PC Windows
• Schematics, BoM, and User’s guide for a fast configuration and calibration

Contact us for more information

SIC INVERTER platform with Analog Devices and Wolfspeed

Our best-in-class system-level power density and efficiency obtained by combining ADI’s gate drivers, power, isolation, and signal chain solutions with Wolfspeed’s efficient SiC MOSFET technology and controlling it all with Silicon Mobility’s advanced controller chip and application software.

Features

• 800VDC bus nominal (900V max)
• 360ARMS output
• 80kHz maximum control and switching frequency
• Controller board with ACU T222 & AC App – T222
  Inverter
• Supports both SVPWM and DPWM (OPP on request)
• ISO 26262 ASIL-D Certified

View full product detail

SIC INVERTER Reference Design with CISSOID

Up until now, customers only really had 2 options. The first was to develop all the hardware, then integrate with third party software into their design environment. This was extremely time consuming and required in depth knowledge of SiC-based power system design. The second option was to buy an off-the-shelf inverter that, however, does not offer the ability to fully customise for the application requirements. Now this reference design offers the best of both worlds: fast prototyping and adaptable to the application requirements.

• 1200V SiC-based power module
• Up to 350kW/850V operation
• Integrated Gate Driver board
• Control board with ultra-fast ACU T222
• Supports both SVPWM and DPWM
• ISO26262 ASIL Level D ready
• DC and phase current sensors
• DC link capacitor & EMI filter
• Liquid cooling

Contact us for more information