Our expertise
in the field of industry

  • SELVA offers global solutions covering every stage of the products and electronic systems value chain :
  • Specifications definition / Bill of specifications
  • Design / Redesign, safety operating analysis (FMECA)
  • Demonstrator / Prototyping
  • Production Engineering / Design For eXcellence (DFX) expertise (DFM, DFT)
  • Manufacturing (PCBA)
  • Post assembly Coating, varnishing, potting and burning in
  • Full assembly and testing (design and manufacturing of test benches)
  • Operating conditions maintenance / After-sales
  • Lifecycle management solutions
  • Certifications and standards
  • ISO 9001 Quality
  • EN 9100 Aeronautics
  • IPC A600/A610/A620 Class 3
  • Examples of applications
  • Industrial robot
  • Machine tool
  • Human Machine Interface (HMI)
  • Control boards
  • Embedded calculators
  • Switchgear monitoring
You have a project ? Contact us

Our achievements
in industry sector

Control of 300W brushless motor electric actuators

This system is used for the control of quarter-turn or sash hydraulic valves.

This valve actuator uses a 300W brushless motor, which is controlled by 3 MOSFET half H-bridges, synchronization is ensured by 3 Hall Effect sensors.

A power of 300W/24V is applied to the brushless motor. 2 power supply versions are possible:
– AC mains power supply from 85 to 265VAC 50 to 60Hz, undertaken by a PFC stage and a Flyback stage with resonant snubber
– DC power supply, DC voltage from 24 to 60VDC, undertaken by a Flyback stage with resonant snubber

Sensor position inputs (0-10V and 4-20mA), ensuring the correct valve positioning.

The product architecture is based on an STM32 microcontroller.

A BLE module with a proprietary profile allows remote control and monitoring, using an Android application.

Our strengths

  • Brushless motor control 300W
  • Power supply AC DC 300 X (PFC + Flyback)
  • Power supply DC DC 300W Flyback
  • BLE communication (Bluetooth Low Energy)
  • Proprietary profile

Heating and warming solution

This innovative product required the collaboration of several companies: SELVA electronic design office, a Mechanical design office, a designer and an operational safety consulting company.

The product ensures a temperature maintenance within a restricted range of variation, in order to guarantee an authentic soft-boiled egg tasting.

From a technical point of view, this project runs with NTC temperature sensors and a discrete component servo system.

A two-input temperature regulator, working with an hysteresis motor, allows to control the system and to reach the highest level of security.

An independent thermal fuse ensures the product safety in case of failure (Max temperature safety rate 200 °C).

The cost target has been taken into account from the beginning of the design in order to make the right technical and industrialization choices.

Our strengths

  • Collaborative project management
  • Cost optimization
  • Mass production standardisation

Automated forklift trucks

This autonomous robot system is used to automate warehouse operations.

The system utilises embedded computer modules on a bespoke motherboard.
The motherboard includes many peripherals, such as: an 8 port Ethernet hub, 4x RS422 outputs, RS485, CAN bus and many more.

A second subassembly allows the connection of sensors.
It is possible to connect several sensors such as 0-10V, 4-20mA, incremental encoder, CAN bus, strain gauge.
Communication to a central controller uses a 10/100 Ethernet connection.
The power supply of the measurement board uses a 150W Flyback converter.

Our strengths

  • Interface sensors (ANA, TOR, CAN BUS, RS232 etc.)
  • Topology: 150W Flyback
  • STM32 Microcontroller
  • Embedded PC interface
  • Ethernet Hub
  • System security element (Watchdog)