ac-fan-control-ac-motor-control-smartfan

AC Fan & Motor Speed Controls

 

Control Resources is a leading manufacturer of AC motor speed control products that control motors, fans or pumps for a variety of industry applications with current rating up to 18 amps. Our AC motor speed controls regulate motor speed based on inputs that include temperature, analog (0-20mA, 0-10VDC) signal or remote transducer control. Mounting options include DIN rail, open frame, with and without metal enclosures. Control Resources is an OEM (Original Equipment Manufacturer) supplier of fan and motor speed control and alarm products. Our products are not intended for end-user/after market applications.

When a DC fan or motor is available and DC power is available, nothing beats a DC control for energy savings, cost, size, safety or controllability. When circumstances do not permit the use of a DC fan or motor, CRI offers 3 AC motor speed control technologies to consider; TRIAC (voltage or phase control), VFD (Variable Frequency Drive), or ECM (Electronically Commutated Motor).

Standard SmartFan AC Fan & Motor Speed Control Products

Model

Current Rating

Motor Type

Control Technology

Control Options

Input Voltage Range
(AC, Single Phase)

Programming Options

stratusiiStratus II

4A @ 40ºC

1 Phase or 3 Phase Inverter duty

VFD

Temperature, analog (0-5V, 0-10V, 4-20mA), transducer, potentiometer, MODBUS, fixed speed

104 – 253 VAC

Navigator-Programmer-SmlSmartFan Navigator
Programmer

MODBUS, or
Factory set-up
AC motor speed controls NimbusNimbus

7.5A @ 40ºC

1 Phase TRIAC controllable induction motor

TRIAC

Temperature, analog (2-10V, 4-20mA), transducer, potentiometer, fixed speed

95 – 250 VAC

Dip Switches or
Factory set-up

AC motor speed controls Nimbus HPNimbus HP

18A @ 65ºC

1 Phase TRIAC controllable induction motor

TRIAC

Temperature, analog (2-10V, 4-20mA), transducer, potentiometer, Modbus, fixed speed

85 – 300 VAC

Dip Switches or
Factory set-up

AC motor speed controls Cirrus ECMCirrus-ECM

N/A

ECM

ECM

Temperature, analog (0-5V, 0-10V, 4-20mA), transducer, potentiometer, Modbus, fixed speed

22- 26 VAC

Navigator-Programmer-SmlSmartFan Navigator
Programmer

or Factory set-up
Custom AC motor speed controlCustom AC Motor
Speed Control

Control Resources specializes in customizing existing designs as well as providing all new custom controls to meet your specification. For more information visit our Custom SmartFan Controls and Alarms page or talk to one of our engineers.

Email: sales@controlres.com or call 978-486-4160.

Control Technology Overview: TRIAC, VFD & ECM AC Motor Speed Control

AC motor speed controls TRIAC Control TRIAC Control: Nimbus, Nimbus-HP

If system cost is the number one concern, choosing an induction motor [Permanent Split Capacitor (PSC) or Shaded Pole] and a compatible TRIAC control may be the way to go. TRIAC controls also tend to be more energy efficient at higher speeds than VFDs. Drawbacks of this technology include relatively high minimum speeds and potentially nonlinear control curve (input signal vs. motor speed).

Please check out our AC Motor Compatibility page for an explanation of the TRIAC AC motor speed control motor requirements and risks.

stratusii VFD Control: Stratus-II

Not all AC motors are TRIAC controllable. In many of these cases, an inverter duty motor can be successfully controlled with a Variable Frequency Drive (VFD). VFDs tend to be more energy efficient than TRIAC controls at lower speeds and can be run at lower speeds. Drawback to VFDs include, controller cost, size and potential bearing noise.

Please check out our AC Motor Compatibility page for an explanation of the Variable Frequency Drive AC motor speed control motor requirements and risks.

AC motor speed controlsECM control ECM Control: Cirrus-ECM

In recent years, the availability of ECM motors has greatly increased. These are basically DC motors with built-in transformers allowing them to be powered from the AC line. As a result, these motors are the most energy efficient and easiest (inexpensive and accurate) to control. But of course there is no such thing as a free lunch. ECM motors can be pricey and are not always available in the size required.

TRIAC, VFD & ECM AC Motor Speed Control Comparison

TRIAC / Phase Control Variable Frequency Drive ECM Control
Energy Use Good* Good* Best
Controller Accuracy Good Better Best
Low Speed Capability (<50%) Good Better Best
Motor Availability Better Best Low
Induced Bearing Noise Better Good Best
Controller Size Small Large Small
Controller Cost Low High Low
Motor Cost Low Low High

*TRIACs are often more energy efficient at higher speeds, Variable Frequency Drives are more efficient at lower speeds.

Applications – TRIAC, Variable Frequency Drives, & ECM AC Motor Speed Control

home_pump_blue
Pump Control
SmartFan AC motor speed control products are capable of controlling small AC pumps.
AC Motor Speed Control SmartFan AC controls for Clean Room Pressurization
Clean Room Pressurization
SmartFan AC motor speed control products can be used to help keep positive pressure in clean rooms.
AC Motor Speed Control SmartFan AC control for Humidity Control
Humidity Control

SmartFan AC motor speed control products
can automatically regulate fan speed when connected to a humidity sensor.
AC Motor Speed Control SmartFan AC controls for ventilation
Ventilation

SmartFan AC motor speed control products
can be used with a ceiling fan, attic ventilator or duct fan to remove hot air or noxious fumes.
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Initially designed for our own engineering lab, CRI also offers versatile, low cost test equipment for test benches, laboratories, field work and repair facilities.