Open drain output was compared induction motor prices with the small three phase motor push-pull output

induction motor rotor electronic parts 
Specifications
1.20 years manufacturing experience 
2.competitive price,high quality 

3.Delivery Detail:within 10 days after receiving deposit 
Let's say the structure of the open collector output. The structure of the open collector output ac induction motor is shown stator in figure 1, the right of the triode collector what all don't electric motor low rpm pick up, so called open collector (on the left side of the triode is reverse phase, the input to "0", the output is "0"). In figure 1, when the www.dongfeng-motor.com input is "0" at left, in front of the triode by (equivalent to disconnect between collector and emitter E C), so the 5 v power supply by 1 k resistor to the right of the triode, the right of the triode conduction (i.e., the equivalent of a switch is closed); When the input is "1" at left, in front Electric motor of the triode conduction, and the transistor cut-off (switch). Figure 1 we will ac induction motor simplify to look like permanent magnet motors for sale figure 2. In figure 2 switch is controlled by the software, "1" disconnect, "0" when three phase motor closed. Obviously, you can see that when the switch is closed, output it directly, so the output level of 0. And when the switch is off, the output end dangling, namely the high impedance state. Level is unknown at this moment, if behind a resistive load (even if the light load) to the ground, then the output level by the load to the low level, so the circuit is not the output level.