EMC consultancy & engineering
Is your product checked for electromagnetic interference (EMI)? Is electromagnetic compatibility (EMC) like black magic to you? Obtaining a CE-marking for your new product design is of the utmost importance. Any fault in this field can be dangerous for users and bystanders of your device. It can even cause disruption or damage to other devices nearby.
EMI can quickly become a burden, especially when you’re including wireless communication systems in your products (WiFi, BLE, Sigfox, Lora or cellular systems like 4G, LTE-M, NB-IoT …).
Sounds familiar to you? The extensive design experience of Verhaert’s EMC consultants will guide you to solve your problem.
Product compliance is more than just EMC. You can benefit from our experience in functional safety and environmental testing.
Guus Colman, Consultant EmbeddedLab at Verhaert Masters in Innovation
VERSATILE SKILLS & SERVICES
Finding which standards your device needs can be complicated. Get guidance in setting up a list of applicable standards and match them with design guidelines.
360° system review
Tackle EMC and safety early in the design process. Speed up and de-risk your development with Verhaert’s 360° system review: a schematics, layout and mechanical review.
Advice during preparation
All test campaigns require a specific preparation. Verhaert helps to prepare your technical construction file and build your test set-up, in order to get the minimum number of tests.
Test lab set-up
Get in contact with test labs and notified bodies to set up EMC, RED, functional safety and environmental test campaigns.
Use our tools and experience to quickly identify failures, during and after the test campaign. We offer multiple solutions with a minimal impact on your prototype.
Design a compliant product
As integrated product development company Verhaert can design your compliant product or collaborate with you to fill the gaps in know-how.
What sets us apart?
50 years of compliant product design
Product compliance has a major role in Verhaert’s projects. Chances are that we encountered your challenge earlier.
Verhaert has no products of its own. We provide independent advice with only your interests in mind.
Experience in various markets
Benefit from our experience in product compliance in various markets: medical, consumer, industry, energy, building, mobility …
Recent challenging projects
During an in-house pre-compliance test of this IVD measurement device, an ESD-pulse on an isolated heater tray resulted in an operational error. In a lean dedicated test campaign, Verhaert identified the cause and solved it.
Smart add-on sensor to read power consumption and production on a traditional Ferraris meter. Design development from scratch to a full compliant ready-for-market product within a period of 8 months.
A green-yellow wire is essential to connect touchable conductive parts to the safety Earth. It behaves as an inductor at higher frequencies, rendering it useless as equipotential connection. When you select a bad wire length, the wire can work as transmitting or receiving antenna. Equipotentiality only exists with respect to a frequency range (e.g. DC to low frequencies for the safety Earth connection). The type and length of the connection defines in which frequency range the systems can be considered as equipotential.
You can create a clean mechanical design by tying cables together, however it can also disrupt your product’s operation. There are multiple methods to provide interference between cables: resistive, capacitive and inductive coupling. The 2 last options depend on the distance between the cables. Communication and analog lines are often very susceptible and power cables can emit large EM-fields. So intelligent cable segregation is important to prevent self-disturbance within your product. In IEC TR 61000-5-2 multiple cable classes are described going from highly susceptible to highly emissive, together with minimal spacing to prevent EMC problems.
The origin of radiated emission is a signal source at a certain frequency combined with a radiating antenna. The amount of energy in a square wave is mainly defined by the amount of power in its fundamental frequency. However, the band – in which powerful harmonic frequencies are present – are mainly defined by the rise and fall times, which mainly depend on the driver technology used.
If you take into account that a trace of 3,75 cm is a possible quarter wavelength antenna at 1 GHz on FR4, it’s clear that even an 8-bit microcontroller can cause high frequency radiated emission.
You can indeed self-certify your product in most applications. In the declaration of your product’s conformity, you need to state – on your sole responsibility – that your product complies with all applicable legislation (EMC, safety, RED …). It’s advisable to gather proof to support these claims.
Only an end-user can combine CE-compliant products into a system (such as a home cinema system) without needing to comply with CE. If however, you intend to sell a system, this needs to comply with all applicable legislation. This is harder to achieve than CE-compliance for each of its separate parts.
For example, you combine 4 ventilators into a ventilation system and bring it to the market as one entity. As the system performs the same functionality as a single ventilator, the legislation remains the same. This means that the limits for e.g. radiated emission are the same. In this example, the ventilators of the ventilation system can emit 4 times less than a single ventilator to meet the EMC-requirements.
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