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We supply a wide range of different types of motors including synchronous and asynchronous AC motors, brushed and brushless DC motors, and EC motors
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E. Preston Electrical

Motors

What are the different types of Motors?

AC Motors (Alternating Current)

Synchronous Motors:

  • Excited Synchronous Motor: Requires a separate DC supply for the rotor.
  • Reluctance Motor: Uses magnetic reluctance to generate torque.
  • Hysteresis Motor: Utilizes hysteresis in the rotor material for smooth operation.

Asynchronous (Induction) Motors:

  • Squirrel Cage Induction Motor: Commonly used due to its simplicity and durability
  • Slip Ring (Wound Rotor) Induction Motor: Allows for control of the rotor resistance

DC Motors (Direct Current)

Brushed DC Motors:

  • Series Wound DC Motor: High starting torque, used in traction applications.
  • Shunt Wound DC Motor: Constant speed, used in applications requiring stable speed.
  • Compound Wound DC Motor: Combines series and shunt characteristics.

Brushless DC Motors:

  • Permanent Magnet DC Motor (PMDC): Uses permanent magnets for the rotor.
  • Coreless or Ironless DC Motors: Lightweight and efficient 

EC Motors (Electronically Commutated)

  • Energy Efficiency: EC motors consume less power compared to traditional AC motors, making them ideal for HVAC systems and industrial applications.
  • Brushless Design: Unlike conventional DC motors, EC motors use electronic commutation instead of carbon brushes, reducing wear and maintenance.
  • Integrated Electronics: They have built-in controllers that optimize performance and allow for variable speed control.
  • Compact & Versatile: EC motors are commonly used in fans, pumps, refrigeration systems, and ventilation units
Motor 3

What Do We Supply?

We supply a wide range of motors for a variety of applications.
These include:
AC Motors
DC Bushless Motors
DC Brush Motors
EC Brushless Motors
High-power Density Motors
Stepper Motors
Servo Motors

Why Choose E. Preston?

Since our inception in 1980, our business focus has been on providing two things: a reputation for outstanding customer service, and an unbeatable range and stock of electrical and electronic components.

We feel we have achieved that at E Preston, and that probably explains our company growth over the years. We do not want to become complacent though, and we always work hard to exceed customers’ expectations when they deal with us, if we can.

Our service is unashamedly a little old fashioned, ensuring we follow up on promises to customers, and phoning back when we said we were going to. We also do our best to ensure the customer receives their order next day. You can also talk to us about flexible payment terms, if needed.

Please contact us if you need technical assistance about them or any of our products – our team of expert operatives will be happy to help.

to discuss your needs.

Featured Products

Manufacturers

News

September 29, 2026

Schurter DSTH DIP Switch

Image

DSTH DIP Switch

Schurter DSTH Switch Pic

DSTH DIP Switch: Robust Standard Profile and 2.54mm Pitch THT (through-hole technology) Switch

  • 2.54mm standard pitch
  • Robust THT design
  • Extended actuator for easy switching
  • Available in 3 colours: black, red, blue

The DSTH DIP Switch is a robust, standard-profile and 2.54 mm pitch THT (through-hole
technology) switch. It enables electronic devices to be configured directly at hardware level. Addresses, communication parameters, logic states and operating modes can be set easily and
clearly, without modifying software or firmware.

Electrically, the DSTH uses SPST contacts and offers 2~10, 12 multiply positions. Ratings are 25 mA at
24 V for frequently changing switching states and 100 mA at 50 V for constant switching states. Initial
contact resistance is ≤ 50 mΩ and ≤ 100 mΩ after the specified tests. Further specifications include a
dielectric strength of 500 V AC for one minute, 2,000 mechanical switching cycles and an operating force
of ≤ 8 N. The operating temperature range extends from -40 °C to +85 °C.

Typical applications include PLC controls, industrial servers, medical devices, robotics, air-conditioning
systems and household appliances. In these applications, the DSTH can be used for RS485 and
Modbus addressing, BIOS/CMOS settings, as well as the configuration of hardware parameters,
functions and operating modes. Combining proven performance, competitive cost and fast availability,
DSTH is an ideal solution for OEMs seeking a reliable alternative to premium-priced standard DIP switch
brands.

Schurter DSTH Switch App

Enquiry Form: https://www.epreston.co.uk/contact/

Home Page: https://www.epreston.co.uk/epblog/

MORE
September 29, 2026

Eaton Moeller AFDD Arc Fault Detection Device

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AFDD Arc Fault Detection Device

Moeller AFDD Pic

Eaton’s AFDD provides comprehensive protection against
electrical fires triggered by arc faults. This all-in-one
device combines the functions of a residual-current
circuit breaker, miniature circuit breaker, and arc fault
detection, protecting against electric shock, overcurrent,
short circuits, and arc faults. Through continuous electronic
cable monitoring, the device detects arc faults and trips
automatically to reduce the risk of residential electrical
fires. It provides electricians with a more efficient,
standards-compliant solution for enhanced safety.

Core Features:

  • Advanced protection: combines arc‑fault detection, overcurrent & short‑circuit protection and earth‑fault (RCCB) functionality.
  • Rated breaking capacity 6 kA and 10 kA
  • Rated currents up to 40 A
  • Tripping characteristics B, C
  • Tripping indicators show status and trip cause, saving fault‑finding time
  • AFDD busbar as accessory supports easy and flexible installation
Moeller AFDD

Single Module AFDD
Eaton’s single-module AFDD range delivers all-in-one protection in a compact design. Engineered for residential and commercial applications, it enables space-saving distribution boards and seamless upgrades of existing installations, while supporting compliance with BS 7671 AFDD requirements.

Moeller AFDD Single Pic

Features:

  • Arc fault, overload, short circuit & residual current protection
  • Only 18 mm width
  • 6 & 10kA
  • 6 - 40A
  • B & C Characteristic
  • Type A
  • Idn 30mA

Types

  • Type -A: Protects against AC and pulsating DC residual currents.
  • Type -Li/A: As Type -A, but in addition it is short-time delayed. Highly reliable against unwanted tripping.
  • Type -G/A: 10 ms time delay in order to avoid unwanted nuisance tripping (e.g. during thunderstorms).
  • Type -F: Higher immunity against smooth DC currents and enhanced surge current proof capabilities.

Enquiry Form: https://www.epreston.co.uk/contact/

Home Page: https://www.epreston.co.uk/epblog/

MORE
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