This item is no longer available to purchase.


(Silicon Chip Magazine August ‘13) This Induction Motor Speed Controller is suitable for motors up to 1.5kW (2HP) and can be used to control speed over a wide range. It will save big dollars with swimming pool pumps and will be great for running machinery at different speeds. Even better, it will control 3-phase motors as well!

Important Note For Kit Buyers:
This product is supplied in component form and requires soldering, drilling, and assembly. We recommend users are familiar with at least basic electronic principles and have the ability to solder.


  • Controls single-phase or 3-phase induction motors
  • Runs from a single-phase 230VAC, 10A power point
  • Over-current, over-temperature, under-voltage, over-voltage and short circuit protection
  • EMI (electromagnetic interference) filtering for reduced radio interference
  • Inrush current limiting
  • Isolated control circuitry for safety
  • Adjustable speed ramp up/down
  • Pool pump mode
  • Tool spin-up mode
  • Can run 3-phase motors in either direction
  • Optional external speed control pot with run, reverse and emergency stop switches
  • Motor run/ramping and reverse indicator LEDs
  • Fault indicator LED
  • Open collector output provides either fault or up-to-speed indication

Why buy an Altronics Kit?
Altronics kits are premium do-it-yourself projects designed to be assembled with ease. However, basic electronics knowledge and soldering skills are essential to construct our kits. A difficulty rating is provided to help determine if your ability is sufficient to build the kit project. Please note, once assembly has been commenced we are unable to honor any warranty claims. Please see the full details here.

Information & Downloads


  • Motor power: up to 1.5kW (2 horsepower)
  • Maximum output voltage (single or 3-phase motor): ~230V RMS
  • Continuous output current: 8.5A RMS (single-phase), 5A RMS (3-phase)
  • Short-term overload current: 13A RMS (single-phase), 7.5A RMS (3-phase)
  • Switching frequency: 16kHz
  • Quiescent power: 28W
  • Speed ramp period adjustment: 1-30s to full speed
  • Continuous input current: up to 8.7A RMS
  • Speed control range: 1-100% or 1-150% (0.5Hz to 50Hz or 75Hz) in 0.05Hz steps
  • Efficiency: up to 96%
  • Speed control signal: 0-3.3V
  • Up-to-speed/fault output sink: 12V/200mA
    • *Specifications are subject to change without notice.

Warranty & Returns


We offer 12 months warranty on this product from its date of purchase. This is available from Altronics stores, online purchases or Altronics resellers. In accordance with our full warranty terms we will repair, replace or refund if goods you have purchased from us are defective.


Not withstanding our warranty policy, if you are dissatisfied with our goods or service you may return the goods within 14 days of our despatch date. Simply contact us for a return authorisation number and we will refund your purchase in full, less transport costs on receipt of goods. All returned goods must be in as sold condition including all packaging, instructions, invoices etc.