DC Soft Start

Thread Starter

C_1

Joined Mar 26, 2013
1
Hello,

I am looking to implement a "soft start" solution on a DC starting motor and I am running out of ideas. The motor itself is capable of drawing a maximum 2000A @ 70VDC (very short period of time mind you), and therefore I am limited to the components that I can use. I originally thought an IGBT with PWM might work but cannot find much information on controlling the power in a smooth manner (to essentially limit the in rush current).

Any ideas?

Thanks!!
 

#12

Joined Nov 30, 2010
18,224
Do you know what an inrush current limiter is? This page doesn't have any 2000 amp devices, but it has educational use.
 

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THE_RB

Joined Feb 11, 2008
5,438
It's a good idea to have a max current limit (constant current limit) on the DC motor driver.

That limits startup current and torque perfectly, and also puts a max limit on peak load and fault torques etc.
 
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