 Hello and welcome to ST industrial motor control, especially low voltage high power applications. Before starting I would like to introduce myself, I am Salvala Mantilla, technical marketing manager at ST, in charge of defining and executing the strategy for new business generation for all power transistors, including silicon carbide technologies, covering EMEA industrial market. Well, in this session we will go through ST low voltage industrial solution for 48V industrial drives. We will go through four main topics. First, a short introduction on what is required and what is expected from 48V drive system. The second part describes ST solution, ST eval CTM009V1, a 5kW low voltage inverter for industrial motors. In the third part we will see how does the ST solution using STF7 MOSFETs perform from several point of views. And finally, there will be a short summary. So, what do we require from battery operated low voltage drives? First, high end performance is required to achieve requested power output and efficiency. Second, reliability and robustness is needed to withstand the requirements from industrial environment and sustain operation at high power and high current output. Third, this being said, safety still needs to be ensured and this being helped by having low voltage application. In addition, battery operated low voltage drive systems usually provide improved performance by cost ratio. Such systems can be found in different applications from forklifts to golf carts, from robots to vacuum cleaners. So, what do we need to build such a system? Here we can see the drive system structure in several blocks. The three main parts are power, driver and control stages. Power stage has to be able to deliver the needed power and so MOSFETs are being used in parallel to enable requested current capability. This requires reliability, robustness and special attention to design and layout as well. As several more transistors are used, high performance gate drivers are needed to be able to achieve proper switching of all transistors. These gate drivers usually include smart protections such as a smart shutdown, interlocking or integrated comparators to improve safety of the application. Control stage then include the brain of the system which comprises of control algorithm and usually additional safety procedures. These three main blocks are supported by additional parts such as current sensing, battery protection, position sensing and power management to ensure proper operation of the system. ST is able to deliver in all the parts of the drive system and support the full bill of material. For power stage ST offers low voltage F7 MOSFET series in a variety of packages. To drive these MOSFETs ST has gate drivers with high current capability and smart protections such as smart shutdown, interlocking or integrated comparators. For control stage a 32-bit microcontroller can be used from a wide ST portfolio. Let's take a closer look at ST F7 MOSFET series. ST offers low voltage MOSFETs from 40V to 100V for motor control. This family provides extremely low on resistance resulting in low conduction losses and improved efficiency. MOSFET body diode is optimized for better switching performances. Capacitance ratio has been optimized to improve EMI emissions. This makes ST family great technology for low voltage motor control. Here you see an overview of a seven portfolio divided according to voltage level. Several packages are available as shown on the Y-axis while X-axis presents some resistance range of the devices. To look up all devices and have more search options you can use ST MOSFET Finder, an app available for your mobile phone where you can select proper devices for your application on step-by-step basis or just visit ST.com. Using mentioned F7 family and more, ST offers evaluation board for 5kW low voltage drive system, ST EVAL CTM009B1. This board features a modular system to connect together all parts of battery operated low voltage drive and maintains high flexibility for evaluation purposes. Additionally, it is fully compatible with ST motor control ecosystem. Let's take a closer look at the ST EVAL CTM009B1. It is a stackable solution providing four main modules, power stage, bulk capacitor, gate driver and current sensing boards. The board is equipped with motor control connector which enables easy interfacing between control and power boards. It is fully compatible with ST motor control foc library for both sensor red and sensor less operations. Several protections are also included in the solution such as overcurrent protection and undervoltage lockout. You can find more documentation such as schematics or usual manual by following the link to our dedicated ST pages. The key components are 100V F7 MOSFETs used in parallel to achieve a given output power, L6491 high-performance half-bridge driver to ensure proper driving and two switching regulators for power management. The board is also available with automotive grade components and you can follow the link at the bottom to find more details on it. Let's describe each module in more details. We are starting with power board which is manufactured on insulated metal substrate to have better heat dissipation. There are 36 MOSFETs in total, 6 transistors in parallel for each switch position. The board presents a symmetrical power path for optimized switching and independent DC bus connections. Shunt resistors and NTCs are implemented for protection purposes. Snubber circuitry for each switch is on board to decrease the stressing of devices. Moving on the driver board, it can provide up to 4A sync source driving current. Power supply section provides all the necessary voltages for the circuitry. Independent driving paths enable proper driving for MOSFETs used in parallel, while having optimized the turn-on and turn-off resistors. Additional protections are available together with adjustable dead time. You can see highlighted connectors which provide easy interface between power stage, sensing circuitry and control stage. Current sensing board offers galvanically separated current sensors for improved signal to noise ratio and high immunity to external interference. Accuracy is below 1% at 200A. The board can read up to 3 phase currents and even DC bus current if 4th insulated current sensor is present. The last part is the bulk capacitor board, which reduces current ripple and suppresses voltage spikes on this link. The board is designed to withstand current ripple even when operating with low inductance motors. Now that we described the system, let's take a look how the system is performing in real test. Main goal was to check how well the MOSFETs were performing in parallel operation, which includes focus on layout optimization and is as well directly related to balanced current sharing. There are several requirements to achieve proper operation for MOSFETs in parallel, such as right device spec selection, proper device placement on board so that they don't thermally drift away, proper routing to reduce parasitic inductances and several more to further improve the overall layout. The results of these efforts can be seen on the next slides. You can see that the current sharing between the 6 MOSFETs is quite well balanced, allowing proper operations. Indeed, there is not huge difference between current magnitudes and the MOSFETs are being loaded in similar way. The similar goes for body diodes. As you can see, the reverse recovery currents are quite well balanced as well, thus maintaining the load balance set for each MOSFET in parallel. Previous results are further supported by thermal performance of the board, which was measured at 4.5 kW at wood power. From the picture, as well as from the table, you can see that the temperature is quite well balanced and is safely below maximum temperature. The maximal temperature of the devices didn't go over 105 degrees Celsius. To conclude, ST provides flexible modular solution for high-power low-voltage motor drive with high performance, reliability and robustness. This solution is powered by full ST bill of material and part of this solution is F7 low-voltage MOSFET family, which provides widespread range suited for motor control. We are at the end of this presentation. Thank you for your attention and feel free to contact us at any time. We'll be happy to get in contact with you. Thanks and bye-bye.