dc-fan-control-dc-motor-control-smartfan

DC Fan & Motor Speed Controls

 

Control Resources offers off-the-shelf fan & motor control and alarm products for 2, 3, and 4-wire fans that operate at 12, 24, and 48 VDC as well as a DC brush motor drive for high-voltage (up to 280 VDC) motors. SmartFan DC controls regulate speed based on temperature, analog (voltage or current) control signal or I2C communications link and trigger alarms based on temperature or fan fail (Hall Effect) signal. Standard products are shown by fan and motor type below.

SmartFan DC Speed Controls for 2-wire or 3-wire Fans & Motors

SmartFan Model

dc motor speed control Omni SD

Omni SD1

dc motor speed control Multi SD

Multi SD1

Aurora1

Supply Voltage

11.5 – 30 VDC

10 – 58 VDC

10 – 75 VDC

10 – 72 VDC
12 – 48 VAC

Current Rating

20 Watts @ 70°C

4A @ 55°C

4A @ 55°C

6A @ 55°C

Fan / Motor Voltage

12 & 24 VDC

12, 24 & 48 VDC

12, 24 & 48 VDC

12, 24 & 48 VDC

Control Options

Temperature (Thermistor)

Temperature (Thermistor)

Temperature (Thermistor)

Analog (0-5V, 0-10V, 0-20mA) Remote Potentiometer

dc motor speed control Custom
Custom Design

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.

1Models above are compatible with SmartFan TachScan-3 and Tachscan-9 Fan Alarms for 3-wire fan applications:

SmartFan DC Speed Controls with built-in Alarms for 3-wire Fans & Motors

SmartFan Model

dc motor speed control Fusion-4

Fusion-4

dc motor speed control Multi-SR

Multi-SR

dc motor speed control Fusion 9

Fusion-9

Supply Voltage

9.6 – 14.4 VDC

36 – 75 VDC
Single or Dual

36 – 75 VDC
Single or Dual

36 – 75 VDC
Single or Dual

Current Rating

5A @ 75C

3A @ 55C

4A @ 55C

9A @ 55C

Fan / Motor Voltage

12 VDC

24 VDC

24 & 48 VDC

24 VDC

Fan/Motor Connections

Up to 4

Up to 4

Up to 6

Up to 9

Control Options

Temperature (Thermistor), I2C Bus

Temperature (Thermistor), I2C Bus – Single or Dual, Control Signal (PWM, DC), Dual IPMB for ATCA

Temperature (Thermistor), I2C Bus, Control Signal (PWM, DC)

Temperature (Thermistor), I2C Bus – Single or Dual, Control Signal (PWM, DC), Dual IPMB for ATCA

dc motor speed control Cusom-3
Custom Design

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.

SmartFan PWM Speed Controls with built-in Alarms for 4-wire Fans & Motors

SmartFan Model

Cirrus6_r2_PCB_1014

Cirrus-6

Cirrus-9-PWM-fan-control

Cirrus-9

Supply Voltage

10 – 60 VDC

10 – 60 VDC
20 – 76 VDC2

10 – 60 VDC
20 – 76 VDC2

Current Rating

10A @ 70C

12A @ 60C

15A @ 60C

Fan / Motor Voltage

12, 24 & 48 VDC

12, 24 & 48 VDC

12, 24 & 48 VDC

Fan/Motor Connections

Up to 2

Up to 6

Up to 9

Control Options

Temperature (Thermistor), Analog (0-10V, 0-20mA), Remote Transducer

Temperature (Thermistor), I2C Bus – Single or Dual, Control Signal (PWM, DC), Dual IPMB for ATCA

Temperature (Thermistor), I2C Bus – Single or Dual, Control Signal (PWM, DC)

Programming Options

Navigator-Programmer-SmlSmartFan Navigator Programmer or Factory set-up

Navigator-Programmer-SmlSmartFan Navigator Programmer, I2C Bus or Factory set-up

I2C Bus or Factory set-up

Custom Design

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.

DC Power Regulator – Compatible with Cirrus and TachScan products

SmartFan Model

Supply Voltage

Current Rating

Fan / Motor Voltage

Fan / Motor Connections

Control Options

Storm DC Power Regulator for Cirrus 4-wire fan controls and TachScan fan alarms

20 – 76 VDC Single or Dual

16A @ 75°C

12 or 24 VDC output (jumper selectable)

Based on Cirrus selection

Based on Cirrus selection

SmartFan Fan Monitoring & Fan Failure Alarms

tachscan9
SmartFan TachScan-3 and TachScan-9 fan failure alarms can be used to monitor between 1-9 AC or DC fans/motors equipped with a built-in hall effect devise. TachScan-3 and TachScan-9 can be used as standalone fan monitors or used in conjunction with most of the 2 wire controls listed above.
For details, visit Fan Monitoring & Fan Failure Alarms Page.

2, 3 and 4-Wire Fans/Motors Explained

2-wire fans/motors are basic DC fans/motors with positive and negative power leads. SmartFan 2-wire controls regulate fan/motor speed by varying the voltage to the fan/motor. Several SmartFan models offer a temperature alarm output. Multiple fans/motors can be connected in parallel up to the current rating of the model.

3-wire fans/motors have a tach pulse or alarm (rotation/locked rotor) lead in addition to the positive and negative power leads. SmartFan 3-wire controls regulate fan/motor speed and monitor tach pulses to provide pass/fail signals. Some 3-wire fans have an alarm output for the third lead instead of a tach pulse. Standard alarm products can be easily modified for use with these fans. 3-wire fans are very common, so qualifying fans from different fan manufacturers is typical.

4-wire fans/motors have a speed control lead as a fourth wire. SmartFan 4-wire controls pass the supply voltage directly to the fan/motor, and then regulate fan speed by providing a control signal. The controls monitor tach pulses from the fans/motors and provide pass/fail signals.There are three significant advantages to using 4-wire fans.

  • If you have a regulated supply voltage, the speed of the fan/motor can be adjusted by the speed control signal eliminating the need for a buck or buck/boost voltage regulator on the control board greatly reducing control board cost and size.
  • A 2-wire or 3-wire fan/motor can typically operate down to about ½ speed without concern for the fan/motor stalling. A 4-wire fan/motor can be operated at less than ½ speed and can even be turned off using the speed control signal.
  • Fan manufacturers are offering these fans with significantly higher performance features (RPM, pressure, flow) compared to 2- and 3-wire fans.

Disadvantages for these fans include availability, price and compatibility between fan manufacturers to allow qualifying of multiple fans.

Applications for DC motor speed control and fan speed control

DC Motor Speed Control DC & AC Controls for electronics cooling applications

Electronics Cooling

All of Control Resources’ DC & AC Controls can be used in electronics cooling applications for fan speed control to regulate temperature and reduce acoustical noise. Typical OEM applications include file servers, ATE products, storage subsystems, medical devices and telecommunications equipment.

 

DC Motor Speed Control Medical

Medical Instruments & Power Supplies

The SmartFan Wisp is a temperature based fan speed control and temperature alarm circuit contained in a 1/2″D x 3″L probe that can be mounted in the exhaust or inlet of any heat producing equipment. For controlling multiple fans, low air volume applications or unusual fan types, the Wisp is a cost effective choice.

DC Motor Speed Control fan controls for telecommunications

Telecommunications Equipment

Control Resouces specializes in fan speed control for telecommunication applications. The SmartFan Multi SD, Multi SR, Vortex, and Fusion were specifically designed for telecommunications cooling applications. Features available with the Multi SD, Multi SR, Vortex, and Fusion include:

  • Accepting diode OR’d dual power feeds from 10 to 75 VDC
  • Soft start and current limiting
  • Speed control for 12, 24, or 48 VDC fans
  • Speed control based on temperature (thermistor), PWM DC signal or via a serial communication (I2C) bus
  • Multiple programmable alarm and fan status outputs
  • Voltage boost circuit that will maintain required voltage to the fan even when the supply voltage drops below what is needed
  • Managed or intelligent FRU ATCA compliance

Benefits of using SmartFan DC motor speed control and fan speed control include acoustical noise reduction, engergy savings, environmental (humidity, temperature, pressure, flow) regulation, greater system reliability and improved safety.

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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.