off topic Regenerative braking
Archiver
Posts: 46,084
I know what the concept of regenerative braking is but does anyone
know what the circuit would look like?
thanks
kevin
know what the circuit would look like?
thanks
kevin
Comments
>I know what the concept of regenerative braking is but does anyone
>know what the circuit would look like?
>thanks
>kevin
Hi Kevin -
Take look at this web page for a basic description and diagram of
regen braking: http://www.4qdtec.com/bridge.html
Regards,
Bruce Bates
that services golf carts and see if they would let you look at some
service manuals. I believe that EZ-Go, Yamaha, and Club Car all make
electric models that offer regenerative braking.
Tim
> I know what the concept of regenerative braking is but does anyone
> know what the circuit would look like?
> thanks
> kevin
running, and connect it's leads together. It acts more like a generator
than a motor and this action cause it slow down faster or 'regenerate'
power. This switching of power can be done with many different kinds of
devices.
Regards,
Leroy
K Jones wrote:
>
> I know what the concept of regenerative braking is but does anyone
> know what the circuit would look like?
> thanks
> kevin
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and Body
of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Typically there are two ways to do regenerative braking in industrial
systems for both AC and DC motors run off adjustable speed drive technology.
The first method involves using a set of thyristors that are set up to
transmit energy back into the AC power system when regenerative power is
detected. This is typically done with a current detector and sometimes used
in conjunction with a voltage detector.
The other way is simply to put in a power mosfet or IGBT switch in series
with a resistor. This connects across the DC supply bus located in the
drive. A voltage detector is the primary sensing element and sometimes a
current sensor is also used in conjunction with it. The method is simple but
can waste a lot of energy with respect to mobile applications.
There are also two or three other circuit configurations out there that
could be used to help supply regenerative energy back into a storage battery
system as well. This circuit would consist of mosfets/IGBT's and would steer
the excess electrical current back into the battery.
Great stamp applications with respect to control of the system.
HTH de
Gerry Shand
gshand@h...
With enough time, energy and/or money, anything is possible
> Message: 2
> Date: Wed, 31 Oct 2001 23:30:36 -0000
> From: "K Jones" <kj62@y...>
> Subject: off topic Regenerative braking
>
> I know what the concept of regenerative braking is but does anyone
> know what the circuit would look like?
> thanks
> kevin
>I know what the concept of regenerative braking is but does anyone
>know what the circuit would look like?
>thanks
>kevin
The easiest implementation would be to put a bridge rectifier
across each electric motor, with the AC terminals connected to
the motor terminals. The + and - terminals would connect to
the battery terminals + to + and - to -.
Electronic braking would imply a similar setup with a bridge rectifier,
but instead of connecting the + and - terminals to the battery, you
would connect the + terminal to the Collector and the - terminal to
the Emitter of an NPN transistor capable of handling the currents
produced by the motor acting as a generator. Then, across the Base
collector, the easiest method would be to use the output of an
Opto-Isolator to control the ON/OFF ratio of the NPN transistor...
In this case you would want to use PWM to control the "braking"
transistors ON/OFF ratio.
Beau Schwabe IC Mask Designer
National Semiconductor Wired Communications Division
500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071