Machine Design

45-mm brushless motors

Two new iBLDC (intelligent brushless dc) motors with four-quadrant speed controls in the 45-mm frame size, have been reduced in size by 25%, while maintaining the same power and torque capabilities.

The new BG45x15SI was reduced in length from 120 to 88 mm (4.7 to 3.5 in.), while the length of the more-powerful BG45x30SI was reduced from 135 to 103 mm (5.3 to 4.0 in.).

The new BG45SI motors feature digital control and power electronics and the motor connector has been updated for space saving and convenience in mounting and connection. With a 12 or 24-V power source, at a nominal speed of 3,000 rpm, the BG45x30SI is continuous- duty rated for 80 W (¹/”•-hp) power output. The motors can achieve peak powers of four times the continuous duty rating and, therefore, a starting torque of up to 100 N-cm (142 oz-in.) is possible.

The motor target speed can be set using an analog ±10-Vdc input signal or be selected via digital inputs using simple start-up software.

The drive has four digital inputs — two for selecting the four operating conditions: rotation clockwise/counterclockwise, stop with free running, and stop with holding torque. The other two are for selecting the motor speed with acceleration and deceleration ramps.

Dunkermotor USA Inc.
A div. of Dunkermotoren GmbH
2511 Technology Dr.
Suite 105
Elgin, IL 60124
(224) 293-1300

© 2012 Penton Media, Inc.

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