That bench supply will back off the voltage if the current limit is reached until the current doesn't exceed the limit. They will not be harmed - a supply that would be damaged if you accidentally let the clip-leads touch wouldn't last long. That power supply allows you to adjust the current limit, and when that limit is hit, it acts as a constant current supply. Supplies not meant as bench supplies usually turn off entirely, requiring power to be completely removed before they will turn on again. Bare DC-DC converters may or may not have some sort of short circuit or overcurrent protection - those that don't can be damaged by excess current or short circuit.
Thank you for the reply, so is a flywheel diode needed in my situation where i am hooking up bare leads of the motor and power supply?
The flywheel diode is necessary across any motor regardless of anything else you are doing.
So where did the OP mention anything about switching?
When the motor turns off...
So where did the OP mention anything about switching?Getting ahead of yourselves fellas!
Hello, what do you mean?
Should I have a flyback diode when I hook the motor straight to the supply
Yes, a single 5408 diode is quite sufficient. It is rated at 3A continuous, and with a 150A Peak Forward Surge Current for 8.3ms. Depending on the load, the motor will likely stop in that 8ms. Even if it has enough inertia to keep spinning, it will have slowed to a point that the current through the diode will likely be way less than 3A.
In the case of a motor, when the supply power is removed, the motor becomes a generator with the polarity reversed. The flyback diode shorts out this reverse voltage generated by the motor acting as a generator. As a side benefit, this shorting out of the reverse voltage dynamically slows the motor turned generator more quickly than free spinning down.
What i noticed when I soldered and reconnected the motor to the diodes in parallel and hooked it up to the power supply( After setting the max current/constant current to 4.8 amps), that my power supply only spikes above 4 amps when i first hook it up, then levels off to 2.5 amps after a second.
1) Is the reason there is a current spike on startup because the inductor is resisting current flow? I get that inductors try to keep the current from changing by applying its own force, im just not sure why there is a sudden spike on startup? ( On turning the motor off it makes sense to me why the would be a large current spike because there is built up energy in the form of a magnetic field.
2) I am trying to learn more about flywheel diodes and what makes the diode work harder(more heat given off), Is it when power is being supplied and it is blocking current in the reverse direction? Or is it when the power is removed and the large current spike travels forward bias through the coil and diode and around and around again?