• on Miscellaneous Electronics
  • Published in issue 7/2013 on page 56
About the article

Big Amps DC Motor Driver

Big Amps DC Motor Driver
This simple circuit is designed for use with all kinds of DC motors up to 40 amps. Basically it’s just a simple oscillator driving a bunch of power MOSFETs, but it works a treat.
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Products
Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

COMPONENT LIST
Resistors
R1 = 10kOhm, 5%, 0.25W
P1 = 100kOhm, 20%, linear potentiometer, 0.2W
Capacitors
C1 = 470µF 35V, 20%, 3.5mm lead spacing
C2 = 10µF 25V, 20%, 2mm lead spacing
C3 = 100nF, 50V, 20%, ceramic, 5mm lead spacing
C4 = 22nF, 100V, 20%, ceramic, 5mm lead spacing
Semiconductors
D1,D2 = 1N4148
D3 = RURP8100
T1-T4 = IRFP150N
IC1 = 40106
IC2 = 78L12
Miscellaneous
4 pcs. FastOn spade terminal (tab), straight, PCB mount, 0.2''(5.1mm) lead spacing
Heatsink, 1.9K/W, 100 x 40 x 50 mm, Fischer Elektronik type SK 92/50 SA
TO-3P silicone elastomer insulation (T1-T4)
TO-220 device insulating kit; mica sheet + bush (D3)
PCB # 120406-1 v1.0
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