High-Current Distribution
Implementing heavy copper (4oz to 14oz+) and busbar integration to handle 1000A+ DC sources.
PCB DESIGN SERVICESPower Electronics
Power Electronics
PCB Design.
Modern power electronics systems demand more than simple interconnects; they require a holistic electromagnetic and thermal engineering strategy where the PCB is a functional element of the circuit. At Qmax Systems, we treat power electronics PCB design as a discipline of balancing high-current density, extreme voltage gradients, and rapid switching transients (di/dt and dv/dt).
Our engineering team specializes in First-Time-Right PCB design, prioritizing early risk identification to eliminate the costly re-spins often associated with high-power R&D. Whether your project involves 800V EV architectures or kW-level plasma generators, our designs are optimized for reliability, safety, and manufacturability from day one.
Introduction to Power Electronics PCB Engineering
Power circuits operate in environments where parasitic inductance and thermal bottlenecks can compromise the entire system. Unlike standard digital boards, Power Electronics PCBs must manage:
Creepage and Clearance
Adhering to IEC 60601, UL 62368-1, and IPC-2221 standards for high-voltage isolation up to 1500VDC.
Switching Noise Mitigation
Reducing conducted (CE) and radiated emissions (RE) in high-frequency SiC and GaN MOSFET applications.
Thermal Considerations
Utilizing metal substrates (IMS), thermal via arrays, and specialized cooling interfaces to prevent junction temperature violations.
Industries Served
Our power electronics expertise supports sectors requiring high-reliability and high-efficiency energy conversion:
Industrial Automation
Intelligent motor controllers, 3-phase induction systems, and high-power LF ozone generators.
Renewable Energy & EV
800V Battery Management Systems (BMS), Onboard Chargers (OBC), solar PFC controllers, smart meters, and PF controllers.
Datacenters
50KW Class 3-phase Smart PDUs with integrated power monitoring.
Aerospace & Defense
Ruggedized power modules and high-reliability 1500VDC systems for heavy machinery.
Why Choose Qmax Systems?
Engineering-Led Design
All PCB designers at Qmax are Electrical Engineers capable of understanding circuit functionality and perform circuit analysis.
First-Time-Right Philosophy
We utilize a structured 25-year evolved process and checklists covering HV safety, EMI, thermal, and manufacturability.
Compliance-Ready Layout
We focus on CE, FCC, UL, and IEC certification requirements starting from Day 1.
IP Ownership
The customer retains 100% ownership of all native CAD files, libraries, and simulation data.
4. Applications & Real Project Experience
Qmax Systems has a proven track record of delivering high-power hardware for complex industrial and automotive applications.
| Application | Technical Challenges & Qmax Approach |
|---|---|
| PF Controllers for Load Banks | High voltage PF correction with low THD. Designed optimized PFC loops with controlled switching noise and EMI filtering. |
| 50kW 3-Phase Smart PDU | Bus bar integration for high current distribution. Thermal management using copper planes + mechanical integration. |
| 800V Battery Management System | HV isolation, active balancing, precision sensing under high noise environment. |
| 3-Phase CLLC Onboard Charger | High-frequency resonant operation. Minimized loop inductance and optimized magnetics placement. |
| BLDC / PMSM Motor Controller | High di/dt switching, gate driver isolation, low EMI layout, thermal path optimization. |
| Smart Energy Meter | High accuracy measurement with isolation and surge protection (EFT/ESD). |
| 3-Phase Induction Motor Controller | High current switching, robust grounding, EMI suppression techniques. |
| 1kW LF Ozone Generator | High power analog + switching coexistence. CE/IEC compliance achieved. |
| 1.2kW RF Plasma Generator | RF + power electronics coexistence. Reduced radiated emissions through shielding and layout discipline. |
| 1500VDC Systems (Heavy Equipment) | Extreme clearance/creepage design, HV safety, insulation coordination. |
Complimentary Schematic Review
Every power electronics engagement includes a complimentary schematic review to identify architectural risks before layout begins:
HV/LV Isolation Strategy
Reviewing opto-isolation, creepage paths, and magnetic barriers.
Magnetics & Filtering
Validating transformer winding geometries and EMI filter stages like Pi-filters and Common Mode Chokes.
Component Lifecycle
Checking for EOL or "At Risk" components to ensure long-term production stability.
Complimentary Session
1-Hour Complimentary Engineering Consultation
We offer a free technical session with our senior engineers to discuss your power electronics challenges, surface hidden layout risks, and align the design path before execution.
Format
1:1 Engineer Review
Focus
Risk Reduction
Outcome
Faster Design Decisions
Frequently asked questions.
How do you handle high-current requirements in small form factors?
We utilize heavy copper PCBs (up to 14oz+), busbar integration, and thermal via arrays to maximize current-carrying capacity while maintaining a compact footprint.
What standards do you follow for high-voltage isolation?
We strictly adhere to IPC-2221B for generic design and IEC 60601 (Medical) or UL 62368-1 for specific safety clearances and creepage distances.
How do you mitigate switching noise in SiC or GaN designs?
By minimizing loop inductance in the gate drive and power loops, implementing Pi-filters, and using 3D EM simulation to identify and suppress high-frequency harmonics.
Do you design custom magnetics for power converters?
Yes. We specify core materials, winding geometries, and litz wire for custom inductors and transformers to optimize efficiency and thermal performance.
How is thermal management validated?
We perform 3D Thermal Analysis to identify hotspots and optimize the interface between the PCB, components, and heatsinks or enclosures.
Can you assist with boards that failed EMI (CE/RE) testing?
Yes. We provide "rescue" services, using near-field probes to locate noise sources and redesigning layouts to ensure compliance with CE/FCC standards.
Do you support busbar-to-PCB integration?
Absolutely. We design the mechanical and electrical interfaces for high-current busbars, ensuring reliable connections for industrial PDUs and motor drives.
What materials are recommended for high-power applications?
Beyond standard FR-4, we utilize metal-clad substrates (IMS) for heat dissipation or high-Tg materials for high-temperature environments.
How do you manage THD in PFC controllers?
We focus on precision current sensing layout and low-impedance feedback paths to ensure the controller maintains high power factor and low Total Harmonic Distortion.
Do you provide fabrication support?
Yes. We act as a direct technical liaison with fabrication houses to resolve stackup, material queries, and DFM issues before production.
PCB Programs
