Motion Control - ElmoMC

Dragonfly

Ultralight Current Mode Servo Amplifier

Ideal for trapezoidal commutation

The Dragonfly is a series of ultralight ExtrIQ current mode servo amplifiers for DC brush and brushless motors.

Weighing only 0.76 oz (21.5 g), the Dragonfly can withstand extended environmental conditions and can support up to 3.3 amps continuous current. This high power density servo amplifier can deliver up to 480 W of peak power or 240 W of continuous power.

The servo amplifier offers significant operating features, including excellent output linearity and zero dead band performance. The Dragonfly is a PCB mounted device that enables efficient, cost saving implementation.

Miniature Military Analog Amplifier for brush and brushless motors

Standards

Dragonfly Documentation

Feature

Units

3/60

2.5/100

Minimum supply voltage

VDC

11

20

Nominal supply voltage

VDC

50

85

Maximum supply voltage

VDC

59

95

Maximum continuous power output

W

190

240

Efficiency at rated power

%

Up to 99%

Maximum output voltage

 

93% of DC bus voltage at f=32 kHz

DC and trapezoidal commutation continuous current limit (Ic)

A

3.3

2.5

Peak current limit

A

2 x Ic

Weight

g (oz)

21.5 g (0.76 oz)

Dimensions

mm in)

51 x 12.5 x 42 (2" x 0.49" x 1.65")

Mounting method

 

PCB mount

Product Catalog Number

Feature

Units

 Specification

PWM switching frequency

kHz

32 ± 5% default on motor

Switching method

 

Advanced Unipolar PWM

Current loop bandwidth

kHz

Up to 4

Maximum case temperature

°C (°F)

87 °C (188 °F)

Storage temperature

°C (°F)

-40° C – 100°C (-40 °F – 212 °F)

Ambient temperature

°C (°F)

Non-operating: -50 °C to +100 °C (-58 °F to 212 °F)

Operating: -40 °C to +70 °C (-40 °F to 160 °F)

Temperature shock

°C (°F)

-40 °C to +70 °C (-40 °F to 160 °F) within 3 min

Maximum humidity

%

Non-operating: up to 95% relative humidity non-condensing at 35 °C (95 °F)

Operating: up to 95% relative humidity non-condensing at 25 °C (77 °F) up to 90% relative humidity non-condensing at 42 °C (108 °F)

Maximum altitude

m (ft)

Non-operating: No limit

Operating: -400 m to 155,000 m (-1,300 ft to 510,000 ft)

Vibration

Hz

20 Hz - 2000 Hz, 14.6 g

Mechanical shock

 

Non- operating: ±40 g (1.41 oz), Half sine, 11 msec

Operating: ±20 g (.71 oz), Half sine, 11 msec

Accessories
Evaluation Board

An evaluation board that uses standard terminal plugs and
D-sub connectors is available. It is accompanied by documentation that describes how to set up the board, and by a complete set of cables.

For more information click here.