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The motor experts
With over 75 years in the industry, we know motors and inverters! Whether you’re looking for electric motors, inverters, transformers, phase converters or other motor accessories, we have chosen products that we know won’t let you down.
Our aim is to offer a great product range, the best possible service, and fast delivery, all at a great price. Some of the UK’s biggest firms trust us with their equipment, so you can trust us for your electric motors and inverter needs.
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Why choose RJW Motors & Inverters?
- We beat any genuine quote
- Same-day expert quotes available
- Trusted by leading UK businesses
- Reliable products from proven brands
Avoid delays, reduce downtime and get the right equipment you need first time.
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Get a fast, competitive quote on industrial motors
With over 75 years of industry experience, we supply high-performance electric motors, inverters, transformers, phase converters and other motor accessories to businesses across the UK.
We stock products that we know won’t let you down.
Our aim is to offer a great product range, the best possible service and fast delivery, all at a great price. Whether you’re replacing equipment, upgrading systems, or sourcing for a new project, our experts will recommend the right solution for you.
Frequently Asked Questions
What types of electric motors are available?
RJW Motors and Inverters supply single-phase units running 0.12kW to 3kW on a standard 230V supply and three-phase motors that extend to 7.5kW, with TEC starting at 0.18kW and Brook Crompton covering the full range.
B56 imperial frames suit machine tools with rolled steel casings in drip-proof or totally enclosed options. Mounting styles include foot (B3), C face (B14), and D flange (B5) configurations.
How do I specify the correct motor for my application?
Electric motors have kW ratings you can match to your load demands, with single-phase limited to 3kW whilst three-phase extends to higher power outputs.
Environmental factors matter, too, with food processing needing washdown protection, dusty locations requiring totally enclosed fan cooling, and space constraints influencing mounting choices between foot, face or flange configurations.
Single-phase vs three-phase motors?
230V domestic supply restricts single-phase motors to 3kW maximum output. 400V industrial connections let three-phase units deliver consistent torque above 0.75kW with superior efficiency.
Capacitors complicate single-phase starting, especially on larger motors. Three-phase designs start directly, maintain cooler temperatures, and handle continuous duty without additional components.
What is the life expectancy of an electric motor?
It’s normal for an electric motor to last 15-20 years when it is appropriately specified for your application.
Aggressive environments significantly reduce lifespan – chemical vapours attack windings, dust blocks cooling vents. Choosing the correct enclosure type from the start protects your investment better than any maintenance routine.
How do I select the appropriate motor speed?
Your driven equipment determines pole selection – fans typically need 2800-3000rpm two-pole motors, pumps suit 1400-1500rpm four-pole units, and conveyors often use 950-1000rpm six-pole designs. Direct coupling requires exact speed matching.
Variable speed drives offer flexibility when fixed speeds won’t suffice. Belt reduction from faster motors sometimes provides better control than direct-drive arrangements.
Where can I find more information or assistance?
RJW Motors and Inverters provide technical support on 0800 999 0200. Our facility stocks the electric motors covered above, plus compatible drives and accessories.
Access wiring diagrams and dimensions online or email [email protected] for quotations.