The discussion revolves around the feasibility of constructing an H-bridge using different types of relays, specifically focusing on the use of 2 SPDT relays and 1 DPDT relay. Participants explore various configurations and their implications for motor operation, including bi-directional control.
Participants express differing views on the configurations that can successfully form an H-bridge, with no consensus reached on the optimal relay setup or the operational reliability of the proposed configurations.
Participants note specific conditions under which certain motors may not operate bi-directionally, highlighting the importance of motor type and relay configuration in achieving desired outcomes.
skeptic2 said:
Bob S said:
On certain motors, like fractional HP induction motors (capacitor start, split phase, repulsion start), there is a starting coil and a running coil. If you try to reverse the motor at full speed, it won't. It has to slow down until the centrifugal switch engages, and preferably until it stops before you reverse it.ramonegumpert said:
ramonegumpert said:Hi experts,
Is it possible to form a h-bridge using 2 spdt relays?
What i can find on the net are h-bridges using 4 spst relays or using other types of relays.
sincerely
Ramone