Transformers & Power Magnetics for Robotics & Industrial Automation

We’ve had OEM engineers call us mid-project because their control panel keeps nuisance-tripping on startup. Nine times out of ten it comes back to a control transformer that wasn’t rated for the inrush current hitting it when a bank of contactors energizes at once. It’s a fixable problem  but not after the panel’s already built and listed.

The magnetics in an automation system aren’t exciting until they fail. Then they’re very exciting. We build industrial automation power magnetics  control transformers, low-profile transformers, solenoid coils, and drive transformers for electromagnet and actuator systems  for automation OEMs, machine builders, and integrators who’d rather spec it right the first time.

Products Built for How Automation Actually Runs

Industrial Control Transformers for PLCs & Automation Controllers

Our control transformers are built with the inrush headroom to handle contactor banks energizing on startup without the voltage dip that causes nuisance faults on PLCs, relays, and motor starters. Single-phase dry-type construction encapsulated or open-frame, with primary windings for common machine voltages and secondaries at the standard 120 VAC machine-control level or stepped down to feed 24 VDC power supplies. Designed to be ready for UL- and CSA-recognized on request, with custom VA ratings sized to your actual sealed and inrush load.

Low-Profile (LPC) Transformers for Compact Robotic Chassis

Robot and machine enclosures have gotten shallower as automation has gotten denser. Low-profile control transformers solve that same electrical ratings as a standard unit, significantly reduced height, with mounting and termination configured to your panel layout (foot, DIN rail, or panel mount). If you’ve ever had to redesign an enclosure around a transformer that didn’t fit, this is the part that fixes it.

Solenoid Coils for Actuators, Grippers & Valves

We wind industrial solenoid coils to the force profile, duty cycle, and form factor of your specific actuator  not a catalog design that technically works on paper but runs hot after six months in continuous operation. Available in AC and DC, encapsulated for harsh environments, with lead, spade, or connector terminations. Class B, F, or H insulation depending on your thermal envelope, and duty cycles from intermittent (10% / 25% ED) through continuous.

Transformers for Custom Electromagnet Systems

We don’t build complete electromagnets the magnet itself is typically built by the OEM that knows the mechanical envelope, holding force, gap geometry, and ferrous-load characteristics the application demands. What we build is the transformer that sits upstream of the magnet drive: voltage matched to your line supply, galvanically isolated from the magnet bus, and sized for the inrush that comes when a cold low-resistance magnet winding energizes. Lifting magnets, holding magnets, and end-effector electromagnets all need that upstream component, and getting it right is what keeps the rest of the system reliable across the full duty cycle.

Transformers for Electromagnetic Actuator Assemblies

The actuator assembly itself  coil, core, housing, and mechanical integration is your OEM’s product, and we don’t build it. What we do is build the transformer feeding the controller or rectifier ahead of it: voltage stepped to your electronics drive, isolation between the supply and the actuator bus, and design margin for the switching frequencies and cycle counts the actuator runs at in service. We work from your drive specification, not a generic catalog rating.

Why Automation OEMs Work with Us

• Our engineering team can help with all control transformers, coils, and power inductor components
• Wound, VPI-impregnated, assembled, and tested in-house in the USA  4–8-week lead times, no overseas hand-offs
• UL, CSA, and CE compliance documentation as required  your panel builder won’t hit surprises during listing
• Direct engineer access  the person you talk to is the one who wound your part

Frequently Asked Questions

Q1: What does a control transformer do in an automation panel?


A control transformer steps the supply voltage down to the levels your control circuit runs on  typically 120 VAC for relay and contactor coils, or feeding a 24 VDC power supply for PLC, sensor, and HMI hardware and galvanically isolates the control bus from the power side. That isolation is what keeps switching transients and motor noise off your control signals and protects sensitive electronics when something upstream misbehaves.

Q2: Why does form factor matter so much for robotic transformers?


Because robot enclosures are tight and getting tighter. Low-profile transformers are the only way to get full electrical performance into a shallow control box without compromising the rest of the design. We’ve had customers come to us after trying to make a standard transformer fit a space it was never going to  building to the envelope from the start avoids that.

Q3: What causes solenoid coils to fail early in production environments?


Usually one of three things: duty-cycle mismatch (catalog spec was written for intermittent operation, but the application runs continuous), unmanaged switching transients (back-EMF on DC coils without a proper flyback path destroys insulation over time), or ambient temperature exceeding the insulation class. We size the winding, insulation system, and termination for your actual operating conditions.

Q4: Can you build transformers that drive custom electromagnets and actuator assemblies?


Yes  that’s the side of these systems we work on. We build the drive-side and isolation transformers that sit upstream of magnet rectifiers and actuator controllers. We don’t supply the electromagnet or the assembled actuator itself; if you’re sourcing those from another OEM and need the upstream magnetics built to match  voltage, isolation, inrush headroom, duty cycle send us the magnet or actuator specification and we’ll engineer to it.

Q5: What are your lead times for custom automation magnetics?


4–8 weeks from finalized specification to delivery. Engaging us early in the design cycle is the easiest way to keep magnetics off the critical path during panel build and machine commissioning.